RFC 3986, RFC 7595. Mirror of the IANA URI Schemes registry (uri-schemes-1). 451 records in the 2026-10-16 snapshot.
| Name | Status | Template / URI | Description / References |
|---|---|---|---|
| aaa | Permanent | -- | Diameter Protocol rfc: rfc6733 |
| aaas | Permanent | -- | Diameter Protocol with Secure Transport rfc: rfc6733 |
| about | Permanent | -- | about rfc: rfc6694 |
| acap | Permanent | -- | application configuration access protocol rfc: rfc2244 |
| acct | Permanent | -- | acct rfc: rfc7565 |
| acd | Provisional | -- | acd person: Michael_Hedenus |
| ace | Provisional | -- | ace person: Frank_Bryan |
| aceap | Provisional | -- | aceap person: Frank_Bryan |
| acedp | Provisional | -- | acedp person: Frank_Bryan |
| aceep | Provisional | -- | aceep person: Frank_Bryan |
| acelp | Provisional | -- | acelp person: Frank_Bryan |
| aceup | Provisional | -- | aceup person: Frank_Bryan |
| acr | Provisional | -- | acr person: OMA-OMNA |
| adiumxtra | Provisional | -- | adiumxtra person: Dave_Thaler |
| adt | Provisional | -- | adt person: SAP_SE |
| aet | Provisional | -- | aet person: Tad_MacPherson |
| afp | Provisional | -- | afp person: Dave_Thaler |
| afs | Provisional | -- | Andrew File System global file names rfc: rfc1738 |
| agtp | Provisional | -- | agtp person: Chris_Hood |
| aim | Provisional | -- | aim person: Dave_Thaler |
| alter | Provisional | -- | alter draft: draft-morrison-alter-uri-scheme-03 |
| amss | Provisional | -- | amss person: RadioDNS_Project |
| android | Provisional | -- | android person: Adam_Barth uri: https://developer.android.com/guide/topics/manifest/manifest-intro |
| appdata | Provisional | -- | appdata person: urischemeowners_at_microsoft.com |
| apt | Provisional | -- | apt person: Dave_Thaler |
| ar | Provisional | -- | ar person: Arweave_Team |
| ari | Provisional | -- | ari draft: draft-ietf-dtn-ari-04 |
| ark | Provisional | -- | ark person: ARK_agency uri: https://n2t.net/ark:/21206/10015 |
| ars | Provisional | -- | ars draft: draft-juwan-ars-uri-00 |
| arv | Provisional | -- | arv person: Sander_Saar |
| at | Provisional | -- | at
(see person: Bluesky_PBLLC person: Paul_Frazee |
| attachment | Provisional | -- | attachment person: Dave_Thaler |
| aw | Provisional | -- | aw person: Dave_Thaler |
| barion | Provisional | -- | barion person: Bíró_Tamás |
| bb | Historical | -- | bb person: IESG |
| beshare | Provisional | -- | beshare person: Dave_Thaler |
| bitcoin | Provisional | -- | bitcoin person: Dave_Thaler |
| bitcoincash | Provisional | -- | bitcoincash person: Corentin_Mercier |
| bl | Provisional | -- | bluetooth (shortened) person: Daniel_Cowling |
| blob | Provisional | -- | blob person: W3C_WebApps_Working_Group person: Chris_Rebert |
| bluetooth | Provisional | -- | bluetooth person: Daniel_Cowling |
| bolo | Provisional | -- | bolo person: Dave_Thaler |
| brid | Provisional | -- | brid person: Jürgen_Grupp person: Michael_Ranft person: Sophie_Schenkel |
| browserext | Provisional | -- | browserext person: Mike_Pietraszak |
| cabal | Provisional | -- | cabal person: Frédéric_Wang person: Cabal_Club |
| caip | Provisional | -- | caip person: Patrick_Collins |
| calculator | Provisional | -- | calculator person: urischemeowners_at_microsoft.com |
| callto | Provisional | -- | callto person: Alexey_Melnikov |
| canactid | Provisional | -- | canactid draft: draft-schrock-canonical-action-identifier-05 |
| cap | Permanent | -- | Calendar Access Protocol rfc: rfc4324 |
| cast | Provisional | -- | cast person: Adam_Barth uri: https://developers.google.com/cast/docs/registration |
| casts | Provisional | -- | casts person: Adam_Barth uri: https://developers.google.com/cast/docs/registration |
| chrome | Provisional | -- | chrome person: Dave_Thaler |
| chrome-extension | Provisional | -- | chrome-extension person: Dave_Thaler |
| cid | Permanent | -- | content identifier rfc: rfc2392 |
| cm | Provisional | -- | cm person: Jan_Zdráhal |
| coap | Permanent | -- | coap rfc: rfc7252 |
| coap+tcp | Permanent | -- | coap+tcp
(see rfc: rfc8323 |
| coap+ws | Permanent | -- | coap+ws
(see rfc: rfc8323 |
| coaps | Permanent | -- | coaps rfc: rfc7252 |
| coaps+tcp | Permanent | -- | coaps+tcp
(see rfc: rfc8323 |
| coaps+ws | Permanent | -- | coaps+ws
(see rfc: rfc8323 |
| com-eventbrite-attendee | Provisional | -- | com-eventbrite-attendee person: Bob_Van_Zant |
| content | Provisional | -- | content person: Dave_Thaler |
| content-type | Provisional | -- | content-type person: Donald_Eastlake |
| crid | Permanent | -- | TV-Anytime Content Reference Identifier rfc: rfc4078 |
| cstr | Provisional | -- | cstr person: Wang_Shu |
| cttps | Provisional | -- | cttps person: Saso_Ahmed |
| cvs | Provisional | -- | cvs person: Dave_Thaler |
| dab | Provisional | -- | dab person: RadioDNS_Project |
| dat | Provisional | -- | dat person: Frédéric_Wang person: Paul_Frazee |
| data | Permanent | -- | data rfc: rfc2397 |
| dav | Permanent | -- | dav rfc: rfc4918 |
| dhttp | Provisional | -- | dhttp
(see person: Qi_Zhou |
| diaspora | Provisional | -- | diaspora person: Dennis_Schubert |
| dict | Permanent | -- | dictionary service protocol rfc: rfc2229 |
| did | Provisional | -- | did person: W3C_Decentralized_Identifier_Working_Group person: Manu_Sporny person: Ivan_Herman |
| dilithium3 | Provisional | -- | dilithium3 person: Juan_Jose_Todoli_de_Torres |
| dis | Provisional | -- | dis person: Christophe_Meessen |
| dlna-playcontainer | Provisional | -- | dlna-playcontainer person: DLNA |
| dlna-playsingle | Provisional | -- | dlna-playsingle person: DLNA |
| dnp | Provisional | -- | dnp person: Shuai_Wang |
| dns | Permanent | -- | Domain Name System rfc: rfc4501 |
| dntp | Provisional | -- | dntp person: Hans-Dieter_A._Hiep |
| doi | Permanent | -- | doi uri: https://doi.org/10.1000/292 person: Pierre-Anthony_Lemieux person: DOI_Foundation |
| donau | Provisional | -- | donau draft: draft-grothoff-donau-02 |
| dpp | Provisional | -- | dpp person: Gaurav_Jain person: Wi-Fi_Alliance |
| drm | Provisional | -- | drm person: RadioDNS_Project |
| drop | Historical | -- | drop person: IESG |
| dtmi | Provisional | -- | dtmi person: urischemeowners_at_microsoft.com |
| dtn | Permanent | -- | DTNRG research and development rfc: rfc9171 |
| dvb | Provisional | -- | dvb draft: draft-mcroberts-uri-dvb-09 |
| dvx | Provisional | -- | dvx person: Clemens_Bastian |
| dweb | Provisional | -- | dweb person: Frédéric_Wang person: Protocol_Labs |
| ed2k | Provisional | -- | ed2k person: Dave_Thaler |
| eid | Provisional | -- | eid person: eSIM_Group_GSM_Association |
| elsi | Provisional | -- | elsi person: Kimmo_Lindholm |
| embedded | Provisional | -- | embedded person: Peter_Hoddie |
| ens | Provisional | -- | ens person: Ricky_Bloomfield person: Bradley_Nelson |
| esim | Provisional | -- | esim person: eSIM_Group_GSM_Association |
| ethereum | Provisional | -- | ethereum person: Frédéric_Wang person: ligi |
| example | Permanent | -- | example rfc: rfc7595 |
| ez | Provisional | -- | ez person: Roy_Fang |
| facetime | Provisional | -- | facetime person: Dave_Thaler |
| fax | Historical | -- | fax rfc: rfc2806 rfc: rfc3966 |
| feed | Provisional | -- | feed person: Dave_Thaler |
| feedready | Provisional | -- | feedready person: Mirko_Nosenzo |
| fido | Provisional | -- | fido person: Adam_Langley |
| file | Permanent | -- | Host-specific file names rfc: rfc8089 |
| filesystem | Historical | -- | filesystem person: W3C_WebApps_Working_Group person: Chris_Rebert |
| finger | Provisional | -- | finger person: Dave_Thaler |
| first-run-pen-experience | Provisional | -- | first-run-pen-experience person: urischemeowners_at_microsoft.com |
| fish | Provisional | -- | fish person: Dave_Thaler |
| fm | Provisional | -- | fm person: RadioDNS_Project |
| ftp | Permanent | -- | File Transfer Protocol rfc: rfc1738 |
| fuchsia-pkg | Provisional | -- | fuchsia-pkg person: Adam_Barth uri: https://fuchsia.googlesource.com/fuchsia/ |
| gcx | Provisional | -- | gcx person: Tad_MacPherson |
| gdsi | Provisional | -- | gdsi person: Jan_Zdráhal |
| geo | Permanent | -- | Geographic Locations rfc: rfc5870 |
| gg | Provisional | -- | gg person: Dave_Thaler |
| git | Provisional | -- | git person: Dave_Thaler |
| gitoid | Provisional | -- | gitoid person: Ed_Warnicke |
| gizmoproject | Provisional | -- | gizmoproject person: Dave_Thaler |
| go | Permanent | -- | go rfc: rfc3368 |
| gopher | Permanent | -- | The Gopher Protocol rfc: rfc4266 |
| graph | Provisional | -- | graph person: Alastair_Green |
| grd | Historical | -- | grd person: IESG |
| gsos | Provisional | -- | gsos person: Raphael_Shin uri: https://www.iana.org/assignments/uri-schemes/prov/gsos.pdf |
| gtalk | Provisional | -- | gtalk person: Dave_Thaler |
| h323 | Permanent | -- | H.323 rfc: rfc3508 |
| ham | Provisional | -- | ham rfc: rfc7046 |
| hcap | Provisional | -- | hcap person: urischemeowners_at_microsoft.com |
| hcp | Provisional | -- | hcp person: Alexey_Melnikov |
| hs20 | Provisional | -- | hs20 person: Bruno_Tomas |
| http | Permanent | -- | Hypertext Transfer Protocol rfc: rfc9110 |
| https | Permanent | -- | Hypertext Transfer Protocol Secure rfc: rfc9110 |
| hxxp | Provisional | -- | hxxp draft: draft-salgado-hxxp-01 |
| hxxps | Provisional | -- | hxxps draft: draft-salgado-hxxp-01 |
| hydrazone | Provisional | -- | hydrazone person: Matthias_Merkel uri: https://tech.hydrazone.pro/uri/specification/hydrazone.txt |
| hyper | Provisional | -- | hyper person: Frédéric_Wang person: Paul_Frazee |
| i0 | Provisional | -- | i0 person: Ember_Ana |
| iax | Permanent | -- | Inter-Asterisk eXchange Version 2 rfc: rfc5456 |
| ibi | Provisional | -- | ibi person: Gerald_Jean_Francis_Banon |
| ibi- | Provisional | -- | ibi- person: Gerald_Jean_Francis_Banon |
| icap | Permanent | -- | Internet Content Adaptation Protocol rfc: rfc3507 |
| icon | Provisional | -- | icon draft: draft-lafayette-icon-uri-scheme-01 |
| ilstring | Provisional | -- | ilstring person: OPC_Foundation uri: https://webstore.iec.ch/en/publication/77973 |
| im | Permanent | -- | Instant Messaging rfc: rfc3860 |
| imap | Permanent | -- | internet message access protocol rfc: rfc5092 |
| info | Permanent | -- | Information Assets with Identifiers in Public Namespaces.
rfc: rfc4452 |
| interaction | Provisional | -- | interaction person: W3C_Verifiable_Credentials_Working_Group |
| iotdisco | Provisional | -- | iotdisco person: Peter_Waher uri: https://www.iana.org/assignments/uri-schemes/prov/iotdisco.pdf |
| ipfs | Provisional | -- | ipfs person: Frédéric_Wang person: Protocol_Labs |
| ipn | Permanent | -- | ipn rfc: rfc9758 |
| ipns | Provisional | -- | ipns person: Frédéric_Wang person: Protocol_Labs |
| ipp | Permanent | -- | Internet Printing Protocol rfc: rfc3510 |
| ipps | Permanent | -- | Internet Printing Protocol over HTTPS rfc: rfc7472 |
| iqa | Provisional | -- | iqa draft: draft-li-rttp-iqa-addressing-00 |
| irc | Provisional | -- | irc person: Dave_Thaler |
| irc6 | Provisional | -- | irc6 person: Dave_Thaler |
| ircs | Provisional | -- | ircs person: Dave_Thaler |
| iris | Permanent | -- | Internet Registry Information Service rfc: rfc3981 |
| iris.beep | Permanent | -- | iris.beep rfc: rfc3983 |
| iris.lwz | Permanent | -- | iris.lwz rfc: rfc4993 |
| iris.xpc | Permanent | -- | iris.xpc rfc: rfc4992 |
| iris.xpcs | Permanent | -- | iris.xpcs rfc: rfc4992 |
| isostore | Provisional | -- | isostore person: urischemeowners_at_microsoft.com |
| itms | Provisional | -- | itms person: Dave_Thaler |
| jabber | Permanent | -- | jabber person: Peter_Saint-Andre |
| jar | Provisional | -- | jar person: Dave_Thaler |
| jms | Provisional | -- | Java Message Service rfc: rfc6167 |
| keyparc | Provisional | -- | keyparc person: Dave_Thaler |
| lastfm | Provisional | -- | lastfm person: Dave_Thaler |
| lbry | Provisional | -- | lbry person: Alex_Grintsvayg |
| ldap | Permanent | -- | Lightweight Directory Access Protocol rfc: rfc4516 |
| ldaps | Provisional | -- | ldaps person: Dave_Thaler |
| leaptofrogans | Permanent | -- | leaptofrogans rfc: rfc8589 |
| lid | Provisional | -- | lid person: IS4 |
| linkid | Provisional | -- | linkid person: Christian_Nyffenegger |
| locus | Provisional | -- | locus draft: draft-subthought-locus-uri-scheme-00 |
| lorawan | Provisional | -- | lorawan person: OMA-DMSE |
| lpa | Provisional | -- | lpa person: eSIM_Group_GSM_Association |
| lvlt | Provisional | -- | lvlt person: Alexander_Shishenko |
| machineProvisioningProgressReporter | Provisional | -- | Windows Autopilot Modern Device Management status updates person: urischemeowners_at_microsoft.com |
| magnet | Provisional | -- | magnet person: Dave_Thaler |
| mailserver | Historical | -- | Access to data available from mail servers rfc: rfc6196 |
| mailto | Permanent | -- | Electronic mail address rfc: rfc6068 |
| maps | Provisional | -- | maps person: Dave_Thaler |
| market | Provisional | -- | market person: Dave_Thaler |
| matrix | Provisional | -- | matrix person: Hubert_Chathi |
| mdoc | Provisional | -- | mdoc person: ISO_IEC_JTC1_SC17 |
| mdoc-openid4vp | Provisional | -- | mdoc-openid4vp person: ISO_IEC_JTC1_SC17 |
| message | Provisional | -- | message person: Dave_Thaler |
| microsoft.windows.camera | Provisional | -- | microsoft.windows.camera person: urischemeowners_at_microsoft.com |
| microsoft.windows.camera.multipicker | Provisional | -- | microsoft.windows.camera.multipicker person: urischemeowners_at_microsoft.com |
| microsoft.windows.camera.picker | Provisional | -- | microsoft.windows.camera.picker person: urischemeowners_at_microsoft.com |
| mid | Permanent | -- | message identifier rfc: rfc2392 |
| mms | Provisional | -- | mms person: Alexey_Melnikov |
| modem | Historical | -- | modem rfc: rfc2806 rfc: rfc3966 |
| mongodb | Provisional | -- | mongodb person: Ignacio_Losiggio person: Mongo_DB_Inc |
| moz | Provisional | -- | moz person: Joe_Hildebrand |
| mqtt | Provisional | -- | mqtt person: Mike_Bishop |
| mqtts | Provisional | -- | mqtts person: Mike_Bishop |
| ms-access | Provisional | -- | ms-access person: urischemeowners_at_microsoft.com |
| ms-appinstaller | Provisional | -- | ms-appinstaller person: urischemeowners_at_microsoft.com |
| ms-browser-extension | Provisional | -- | ms-browser-extension person: urischemeowners_at_microsoft.com |
| ms-calculator | Provisional | -- | ms-calculator person: urischemeowners_at_microsoft.com |
| ms-drive-to | Provisional | -- | ms-drive-to person: urischemeowners_at_microsoft.com |
| ms-enrollment | Provisional | -- | ms-enrollment person: urischemeowners_at_microsoft.com |
| ms-excel | Provisional | -- | ms-excel person: urischemeowners_at_microsoft.com |
| ms-eyecontrolspeech | Provisional | -- | ms-eyecontrolspeech person: urischemeowners_at_microsoft.com |
| ms-gamebarservices | Provisional | -- | ms-gamebarservices person: urischemeowners_at_microsoft.com |
| ms-gamingoverlay | Provisional | -- | ms-gamingoverlay person: urischemeowners_at_microsoft.com |
| ms-getoffice | Provisional | -- | ms-getoffice person: urischemeowners_at_microsoft.com |
| ms-help | Provisional | -- | ms-help person: Alexey_Melnikov |
| ms-infopath | Provisional | -- | ms-infopath person: urischemeowners_at_microsoft.com |
| ms-inputapp | Provisional | -- | ms-inputapp person: urischemeowners_at_microsoft.com |
| ms-launchremotedesktop | Provisional | -- | ms-launchremotedesktop person: urischemeowners_at_microsoft.com |
| ms-lockscreencomponent-config | Provisional | -- | ms-lockscreencomponent-config person: urischemeowners_at_microsoft.com |
| ms-media-stream-id | Provisional | -- | ms-media-stream-id person: urischemeowners_at_microsoft.com |
| ms-meetnow | Provisional | -- | ms-meetnow person: urischemeowners_at_microsoft.com |
| ms-mixedrealitycapture | Provisional | -- | ms-mixedrealitycapture person: urischemeowners_at_microsoft.com |
| ms-mobileplans | Provisional | -- | ms-mobileplans person: urischemeowners_at_microsoft.com |
| ms-newsandinterests | Provisional | -- | ms-newsandinterests person: urischemeowners_at_microsoft.com |
| ms-officeapp | Provisional | -- | ms-officeapp person: urischemeowners_at_microsoft.com |
| ms-people | Provisional | -- | ms-people person: urischemeowners_at_microsoft.com |
| ms-personacard | Provisional | -- | ms-personacard person: urischemeowners_at_microsoft.com |
| ms-powerpoint | Provisional | -- | ms-powerpoint person: urischemeowners_at_microsoft.com |
| ms-project | Provisional | -- | ms-project person: urischemeowners_at_microsoft.com |
| ms-publisher | Provisional | -- | ms-publisher person: urischemeowners_at_microsoft.com |
| ms-recall | Provisional | -- | ms-recall person: urischemeowners_at_microsoft.com |
| ms-remotedesktop | Provisional | -- | ms-remotedesktop person: urischemeowners_at_microsoft.com |
| ms-remotedesktop-launch | Provisional | -- | ms-remotedesktop-launch person: urischemeowners_at_microsoft.com |
| ms-restoretabcompanion | Provisional | -- | ms-restoretabcompanion person: urischemeowners_at_microsoft.com |
| ms-screenclip | Provisional | -- | ms-screenclip person: urischemeowners_at_microsoft.com |
| ms-screensketch | Provisional | -- | ms-screensketch person: urischemeowners_at_microsoft.com |
| ms-search | Provisional | -- | ms-search person: urischemeowners_at_microsoft.com |
| ms-search-repair | Provisional | -- | ms-search-repair person: urischemeowners_at_microsoft.com |
| ms-secondary-screen-controller | Provisional | -- | ms-secondary-screen-controller person: urischemeowners_at_microsoft.com |
| ms-secondary-screen-setup | Provisional | -- | ms-secondary-screen-setup person: urischemeowners_at_microsoft.com |
| ms-settings | Provisional | -- | ms-settings person: urischemeowners_at_microsoft.com |
| ms-settings-airplanemode | Provisional | -- | ms-settings-airplanemode person: urischemeowners_at_microsoft.com |
| ms-settings-bluetooth | Provisional | -- | ms-settings-bluetooth person: urischemeowners_at_microsoft.com |
| ms-settings-camera | Provisional | -- | ms-settings-camera person: urischemeowners_at_microsoft.com |
| ms-settings-cellular | Provisional | -- | ms-settings-cellular person: urischemeowners_at_microsoft.com |
| ms-settings-cloudstorage | Provisional | -- | ms-settings-cloudstorage person: urischemeowners_at_microsoft.com |
| ms-settings-connectabledevices | Provisional | -- | ms-settings-connectabledevices person: urischemeowners_at_microsoft.com |
| ms-settings-displays-topology | Provisional | -- | ms-settings-displays-topology person: urischemeowners_at_microsoft.com |
| ms-settings-emailandaccounts | Provisional | -- | ms-settings-emailandaccounts person: urischemeowners_at_microsoft.com |
| ms-settings-language | Provisional | -- | ms-settings-language person: urischemeowners_at_microsoft.com |
| ms-settings-location | Provisional | -- | ms-settings-location person: urischemeowners_at_microsoft.com |
| ms-settings-lock | Provisional | -- | ms-settings-lock person: urischemeowners_at_microsoft.com |
| ms-settings-nfctransactions | Provisional | -- | ms-settings-nfctransactions person: urischemeowners_at_microsoft.com |
| ms-settings-notifications | Provisional | -- | ms-settings-notifications person: urischemeowners_at_microsoft.com |
| ms-settings-power | Provisional | -- | ms-settings-power person: urischemeowners_at_microsoft.com |
| ms-settings-privacy | Provisional | -- | ms-settings-privacy person: urischemeowners_at_microsoft.com |
| ms-settings-proximity | Provisional | -- | ms-settings-proximity person: urischemeowners_at_microsoft.com |
| ms-settings-screenrotation | Provisional | -- | ms-settings-screenrotation person: urischemeowners_at_microsoft.com |
| ms-settings-wifi | Provisional | -- | ms-settings-wifi person: urischemeowners_at_microsoft.com |
| ms-settings-workplace | Provisional | -- | ms-settings-workplace person: urischemeowners_at_microsoft.com |
| ms-spd | Provisional | -- | ms-spd person: urischemeowners_at_microsoft.com |
| ms-stickers | Provisional | -- | ms-stickers person: urischemeowners_at_microsoft.com |
| ms-sttoverlay | Provisional | -- | ms-sttoverlay person: urischemeowners_at_microsoft.com |
| ms-transit-to | Provisional | -- | ms-transit-to person: urischemeowners_at_microsoft.com |
| ms-useractivityset | Provisional | -- | ms-useractivityset person: urischemeowners_at_microsoft.com |
| ms-uup | Provisional | -- | ms-uup person: urischemeowners_at_microsoft.com |
| ms-virtualtouchpad | Provisional | -- | ms-virtualtouchpad person: urischemeowners_at_microsoft.com |
| ms-visio | Provisional | -- | ms-visio person: urischemeowners_at_microsoft.com |
| ms-walk-to | Provisional | -- | ms-walk-to person: urischemeowners_at_microsoft.com |
| ms-whiteboard | Provisional | -- | ms-whiteboard person: urischemeowners_at_microsoft.com |
| ms-whiteboard-cmd | Provisional | -- | ms-whiteboard-cmd person: urischemeowners_at_microsoft.com |
| ms-widgetboard | Provisional | -- | ms-widgetboard person: urischemeowners_at_microsoft.com |
| ms-widgets | Provisional | -- | ms-widgets person: urischemeowners_at_microsoft.com |
| ms-word | Provisional | -- | ms-word person: urischemeowners_at_microsoft.com |
| msnim | Provisional | -- | msnim person: Alexey_Melnikov |
| msrp | Permanent | -- | Message Session Relay Protocol rfc: rfc4975 |
| msrps | Permanent | -- | Message Session Relay Protocol Secure rfc: rfc4975 rfc: rfc8873 |
| mss | Provisional | -- | mss person: Jarmo_Miettinen |
| mt | Permanent | -- | Matter protocol on-boarding payloads that are encoded for use in QR Codes and/or NFC Tags person: Connectivity_Standards_Alliance |
| mtqp | Permanent | -- | Message Tracking Query Protocol rfc: rfc3887 |
| mtrust | Provisional | -- | mtrust person: Egbert_von_Frankenberg |
| mumble | Provisional | -- | mumble person: Dave_Thaler |
| mupdate | Permanent | -- | Mailbox Update (MUPDATE) Protocol rfc: rfc3656 |
| musik | Provisional | -- | musik person: Alexander_Forselius_2 |
| mvn | Provisional | -- | mvn person: Dave_Thaler |
| mvrp | Provisional | -- | mvrp
(see person: Antonio_Walker |
| mvrps | Provisional | -- | mvrps
(see person: Antonio_Walker |
| news | Permanent | -- | USENET news rfc: rfc5538 |
| nfs | Permanent | -- | network file system protocol rfc: rfc2224 |
| ni | Permanent | -- | ni rfc: rfc6920 |
| nih | Permanent | -- | nih rfc: rfc6920 |
| nntp | Permanent | -- | USENET news using NNTP access rfc: rfc5538 |
| nostr | Provisional | -- | nostr person: Alex_Gleason uri: https://github.com/nostr-protocol/nostr |
| notes | Provisional | -- | notes draft: draft-dconmy-notes-uri-scheme-02 |
| npamp | Provisional | -- | npamp draft: draft-bubblefish-npamp-00 |
| num | Provisional | -- | Namespace Utility Modules person: Elliott_Brown uri: https://www.numprotocol.com/specification |
| ocf | Provisional | -- | ocf person: Dave_Thaler |
| oid | Provisional | -- | oid draft: draft-larmouth-oid-iri-04 |
| onenote | Provisional | -- | onenote person: urischemeowners_at_microsoft.com |
| onenote-cmd | Provisional | -- | onenote-cmd person: urischemeowners_at_microsoft.com |
| opaquelocktoken | Permanent | -- | opaquelocktokent rfc: rfc4918 |
| openid | Provisional | -- | OpenID Connect person: OpenID_Foundation_Artifact_Binding_Working_Group uri: https://openid.net/specs/openid-connect-core-1_0-31.html#SelfIssuedRequest |
| openpgp4fpr | Provisional | -- | openpgp4fpr person: Wiktor_Kwapisiewicz |
| opns | Provisional | -- | opns person: Alexander_Taytelbaum |
| ord | Provisional | -- | ord person: Alexander_Taytelbaum |
| ordmail | Provisional | -- | ordmail person: Alexander_Taytelbaum |
| otpauth | Provisional | -- | otpauth person: Frédéric_Wang person: Thomas_Habets |
| p1 | Historical | -- | p1 person: IESG |
| pack | Historical | -- | pack draft: draft-shur-pack-uri-scheme-05 |
| palm | Provisional | -- | palm person: Dave_Thaler |
| paparazzi | Provisional | -- | paparazzi person: Dave_Thaler |
| payment | Historical | -- | payment person: IESG |
| payto | Provisional | -- | payto rfc: rfc8905 |
| pkcs11 | Permanent | -- | PKCS#11 rfc: rfc7512 |
| pkg | Provisional | -- | pkg person: Philippe_Ombredanne |
| platform | Provisional | -- | platform person: Dave_Thaler |
| pop | Permanent | -- | Post Office Protocol v3 rfc: rfc2384 |
| pres | Permanent | -- | Presence rfc: rfc3859 |
| prospero | Historical | -- | Prospero Directory Service rfc: rfc4157 |
| proxy | Provisional | -- | proxy person: Dave_Thaler |
| psyc | Provisional | -- | psyc person: Dave_Thaler |
| pttp | Provisional | -- | pttp person: Tony_Deng person: Tuan_Hoang person: Bob_Hinkle person: Mark_Chen |
| pwid | Provisional | -- | pwid person: Eld_Zierau |
| qb | Provisional | -- | qb person: Jan_Pokorny |
| query | Provisional | -- | query person: Dave_Thaler |
| quic-transport | Provisional | -- | quic-transport draft: draft-vvv-webtransport-quic-00 |
| redis | Provisional | -- | redis person: Chris_Rebert |
| rediss | Provisional | -- | rediss person: Chris_Rebert |
| reload | Permanent | -- | reload rfc: rfc6940 |
| res | Provisional | -- | res person: Alexey_Melnikov |
| resource | Provisional | -- | resource person: Dave_Thaler |
| rmi | Provisional | -- | rmi person: Dave_Thaler |
| rsync | Provisional | -- | rsync rfc: rfc5781 |
| rtmfp | Provisional | -- | rtmfp rfc: rfc7425 |
| rtmp | Provisional | -- | rtmp person: Dave_Thaler |
| rtsp | Permanent | -- | Real-Time Streaming Protocol (RTSP) rfc: rfc2326 rfc: rfc7826 |
| rtsps | Permanent | -- | Real-Time Streaming Protocol (RTSP) over TLS rfc: rfc2326 rfc: rfc7826 |
| rtspu | Permanent | -- | Real-Time Streaming Protocol (RTSP) over unreliable datagram transport rfc: rfc2326 |
| rttp | Provisional | -- | rttp draft: draft-li-rttp-iqa-addressing-00 |
| sarif | Provisional | -- | sarif person: OASIS_Open person: Michael_C_Fanning person: David_Keaton |
| secondlife | Provisional | -- | query person: Dave_Thaler |
| secret-token | Provisional | -- | secret-token rfc: rfc8959 |
| seki | Provisional | -- | seki person: Jim_Jeang |
| service | Permanent | -- | service location rfc: rfc2609 |
| session | Permanent | -- | session rfc: rfc6787 |
| sftp | Provisional | -- | query person: Dave_Thaler |
| sgn | Provisional | -- | sgn person: Dave_Thaler |
| shc | Provisional | -- | shc person: Josh_Mandel |
| shelter | Provisional | -- | shelter person: okTurtles_Foundation |
| shttp (OBSOLETE) | Permanent | -- | Secure Hypertext Transfer Protocol rfc: rfc2660 uri: https://datatracker.ietf.org/doc/status-change-http-experiments-to-historic |
| sieve | Permanent | -- | ManageSieve Protocol rfc: rfc5804 |
| simpleledger | Provisional | -- | simpleledger person: James_Cramer |
| simplex | Provisional | -- | simplex person: Evgeny_Poberezkin |
| sip | Permanent | -- | session initiation protocol rfc: rfc3261 |
| sips | Permanent | -- | secure session initiation protocol rfc: rfc3261 |
| skype | Provisional | -- | skype person: Alexey_Melnikov |
| smb | Provisional | -- | smb person: Dave_Thaler |
| smp | Provisional | -- | smp person: Evgeny_Poberezkin |
| sms | Permanent | -- | Short Message Service rfc: rfc5724 |
| smtp | Provisional | -- | smtp draft: draft-melnikov-smime-msa-to-mda-03 |
| snews | Historical | -- | NNTP over SSL/TLS rfc: rfc5538 |
| snmp | Permanent | -- | Simple Network Management Protocol rfc: rfc4088 |
| sns | Provisional | -- | sns person: Alexander_Taytelbaum |
| soap.beep | Permanent | -- | soap.beep rfc: rfc4227 |
| soap.beeps | Permanent | -- | soap.beeps rfc: rfc4227 |
| soldat | Provisional | -- | soldat person: Dave_Thaler |
| spacify | Provisional | -- | spacify person: Alexander_Forselius |
| spiffe | Provisional | -- | spiffe person: Evan_Gilman |
| spotify | Provisional | -- | spotify person: Dave_Thaler |
| ssb | Provisional | -- | ssb person: Frédéric_Wang person: Secure_Scuttlebutt_Consortium |
| ssh | Provisional | -- | ssh person: Dave_Thaler |
| sss | Provisional | -- | sss person: David_Roy_Thomason |
| starknet | Provisional | -- | starknet person: Abraham_Makovetsky |
| steam | Provisional | -- | steam person: Dave_Thaler |
| stun | Permanent | -- | stun rfc: rfc7064 |
| stuns | Permanent | -- | stuns rfc: rfc7064 |
| submit | Provisional | -- | submit draft: draft-melnikov-smime-msa-to-mda-03 |
| svn | Provisional | -- | svn person: Dave_Thaler |
| swh | Provisional | -- | swh person: Software_Heritage person: Stefano_Zacchiroli |
| swid | Provisional | -- | swid (see rfc: rfc9393 |
| swidpath | Provisional | -- | swidpath (see rfc: rfc9393 |
| tag | Permanent | -- | tag rfc: rfc4151 |
| taler | Provisional | -- | taler draft: draft-grothoff-taler-01 |
| tcxp | Provisional | -- | tcxp uri: https://github.com/typed-context-protocol/charter uri: https://www.w3.org/community/typed-context-protocol/ |
| teamspeak | Provisional | -- | teamspeak person: Dave_Thaler |
| teapot | Provisional | -- | teapot person: Karwan_Stark |
| teapots | Provisional | -- | teapots person: Karwan_Stark |
| tel | Permanent | -- | telephone rfc: rfc3966 rfc: rfc5341 |
| teliaeid | Provisional | -- | teliaeid person: Peter_Lewandowski |
| telnet | Permanent | -- | Reference to interactive sessions rfc: rfc4248 |
| tftp | Permanent | -- | Trivial File Transfer Protocol rfc: rfc3617 |
| things | Provisional | -- | things person: Dave_Thaler |
| thismessage | Permanent | -- | multipart/related relative reference resolution rfc: rfc2557 |
| thzp | Historical | -- | thzp person: IESG |
| tii | Provisional | -- | tii person: Naoto_Fujie |
| tip | Permanent | -- | Transaction Internet Protocol rfc: rfc2371 |
| tn3270 | Permanent | -- | Interactive 3270 emulation sessions rfc: rfc6270 |
| tool | Provisional | -- | tool person: Matthias_Merkel |
| tttps | Provisional | -- | TLS TimeToken Secure Protocol (TTTPS). A cryptographic
temporal ordering proof protocol augmenting TLS 1.3 with Proof-of-Time records. draft: draft-helmprotocol-tttps-04 |
| turn | Permanent | -- | turn rfc: rfc7065 |
| turns | Permanent | -- | turns rfc: rfc7065 |
| tv | Permanent | -- | TV Broadcasts rfc: rfc2838 |
| udp | Provisional | -- | udp person: Dave_Thaler |
| unreal | Provisional | -- | unreal person: Dave_Thaler |
| upn | Provisional | -- | upn person: Gerald_Jean_Francis_Banon |
| upt | Historical | -- | upt person: IESG |
| urn | Permanent | -- | Uniform Resource Names rfc: rfc8141 registry: urn-namespaces |
| ust | Provisional | -- | ust person: Evgenii_Cherniakhovskii person: THE_LAB uri: https://github.com/thelabmd/UST-Protocol/blob/main/spec/UST-1.0.md |
| ut2004 | Provisional | -- | ut2004 person: Dave_Thaler |
| uuaid | Provisional | -- | uuaid person: Madhankumar_Kuppusamy person: UUAID_Foundation |
| uuid-in-package | Provisional | -- | uuid-in-package person: Kunihiko_Sakamoto |
| v-event | Provisional | -- | v-event draft: draft-menderico-v-event-uri-00 |
| vemmi | Permanent | -- | versatile multimedia interface rfc: rfc2122 |
| ventrilo | Provisional | -- | ventrilo person: Dave_Thaler |
| ves | Provisional | -- | ves person: Jim_Zubov |
| videotex | Historical | -- | videotex draft: draft-mavrakis-videotex-url-spec-01 rfc: rfc2122 rfc: rfc3986 |
| view-source | Provisional | -- | view-source person: Mykyta_Yevstifeyev |
| vnc | Permanent | -- | Remote Framebuffer Protocol rfc: rfc7869 |
| vscode | Provisional | -- | vscode person: urischemeowners_at_microsoft.com |
| vscode-insiders | Provisional | -- | vscode-insiders person: urischemeowners_at_microsoft.com |
| vsls | Provisional | -- | vsls person: urischemeowners_at_microsoft.com |
| w3 | Provisional | -- | w3
(see person: Qi_Zhou |
| wais | Historical | -- | Wide Area Information Servers rfc: rfc4156 |
| wasm | Provisional | -- | wasm person: W3C_WebAssembly_Community_Group |
| wasm-js | Provisional | -- | wasm-js person: W3C_WebAssembly_Community_Group |
| wcr | Provisional | -- | wcr person: Jason_Dzubak |
| web+ap | Provisional | -- | web+ap person: Soni_L. |
| web+interaction | Provisional | -- | web+interaction person: W3C_Verifiable_Credentials_Working_Group |
| web3 | Provisional | -- | web3 person: Qi_Zhou |
| webcal | Provisional | -- | webcal person: Dave_Thaler |
| wifi | Provisional | -- | wifi person: Wi-Fi_Alliance person: Jun_Tian |
| wpid | Historical | -- | wpid person: Eld_Zierau |
| ws | Permanent | -- | WebSocket connections rfc: rfc6455 |
| wss | Permanent | -- | Encrypted WebSocket connections rfc: rfc6455 |
| wtai | Provisional | -- | wtai person: Dave_Thaler |
| wyciwyg | Provisional | -- | wyciwyg person: Dave_Thaler |
| xcompute | Provisional | -- | xcompute person: Graham_Orr |
| xcon | Permanent | -- | xcon rfc: rfc6501 |
| xcon-userid | Permanent | -- | xcon-userid rfc: rfc6501 |
| xfire | Provisional | -- | xfire person: Dave_Thaler |
| xftp | Provisional | -- | xftp person: Evgeny_Poberezkin |
| xmlrpc.beep | Permanent | -- | xmlrpc.beep rfc: rfc3529 |
| xmlrpc.beeps | Permanent | -- | xmlrpc.beeps rfc: rfc3529 |
| xmpp | Permanent | -- | Extensible Messaging and Presence Protocol rfc: rfc5122 |
| xrcp | Provisional | -- | xrcp person: Evgeny_Poberezkin |
| xri | Provisional | -- | xri person: Dave_Thaler |
| ymsgr | Provisional | -- | ymsgr person: Dave_Thaler |
| z39.50 | Historical | -- | Z39.50 information access rfc: rfc1738 rfc: rfc2056 |
| z39.50r | Permanent | -- | Z39.50 Retrieval rfc: rfc2056 |
| z39.50s | Permanent | -- | Z39.50 Session rfc: rfc2056 |
| ztdnaid | Provisional | -- | ztdnaid person: Dick_Brooks |