Uniform Resource Identifier (URI) Schemes

Last Updated
Available Formats



Plain text

Registry included below

Uniform Resource Identifier (URI) Schemes

Registration Procedure(s)
Expert Review for Permanent and Historical registrations, 
First Come First Served for Provisional registrations
Graham Klyne
[RFC7595][RFC Errata 4420]
Available Formats

URI Scheme Template Description Status Reference Notes
aaa Diameter Protocol Permanent [RFC6733]
aaas Diameter Protocol with Secure Transport Permanent [RFC6733]
about about Permanent [RFC6694]
acap application configuration access protocol Permanent [RFC2244]
acct acct Permanent [RFC7565]
acr prov/acr acr Provisional [OMA-OMNA]
adiumxtra prov/adiumxtra adiumxtra Provisional [Dave_Thaler]
afp prov/afp afp Provisional [Dave_Thaler]
afs Andrew File System global file names Provisional [RFC1738]
aim prov/aim aim Provisional [Dave_Thaler]
apt prov/apt apt Provisional [Dave_Thaler]
attachment prov/attachment attachment Provisional [Dave_Thaler]
aw prov/aw aw Provisional [Dave_Thaler]
barion prov/barion barion Provisional [Bíró_Tamás]
beshare prov/beshare beshare Provisional [Dave_Thaler]
bitcoin prov/bitcoin bitcoin Provisional [Dave_Thaler]
blob prov/blob blob Provisional [W3C_WebApps_Working_Group][Chris_Rebert]
bolo prov/bolo bolo Provisional [Dave_Thaler]
callto prov/callto callto Provisional [Alexey_Melnikov]
cap Calendar Access Protocol Permanent [RFC4324]
chrome prov/chrome chrome Provisional [Dave_Thaler]
chrome-extension prov/chrome-extension chrome-extension Provisional [Dave_Thaler]
cid content identifier Permanent [RFC2392]
coap coap Permanent [RFC7252]
coaps coaps Permanent [RFC7252]
com-eventbrite-attendee prov/com-eventbrite-attendee com-eventbrite-attendee Provisional [Bob_Van_Zant]
content prov/content content Provisional [Dave_Thaler]
crid TV-Anytime Content Reference Identifier Permanent [RFC4078]
cvs prov/cvs cvs Provisional [Dave_Thaler]
data data Permanent [RFC2397]
dav dav Permanent [RFC4918]
dict dictionary service protocol Permanent [RFC2229]
dlna-playcontainer prov/dlna-playcontainer dlna-playcontainer Provisional [DLNA]
dlna-playsingle prov/dlna-playsingle dlna-playsingle Provisional [DLNA]
dns Domain Name System Permanent [RFC4501]
dntp prov/dntp dntp Provisional [Hans-Dieter_A._Hiep]
dtn DTNRG research and development Provisional [RFC5050]
dvb dvb Provisional [draft-mcroberts-uri-dvb]
ed2k prov/ed2k ed2k Provisional [Dave_Thaler]
example example Permanent [RFC7595]
facetime prov/facetime facetime Provisional [Dave_Thaler]
fax fax Historical [RFC2806][RFC3966]
feed prov/feed feed Provisional [Dave_Thaler]
feedready prov/feedready feedready Provisional [Mirko_Nosenzo]
file Host-specific file names Permanent [RFC1738]
filesystem historic/filesystem filesystem Historical [W3C_WebApps_Working_Group][Chris_Rebert]
finger prov/finger finger Provisional [Dave_Thaler]
fish prov/fish fish Provisional [Dave_Thaler]
ftp File Transfer Protocol Permanent [RFC1738]
geo Geographic Locations Permanent [RFC5870]
gg prov/gg gg Provisional [Dave_Thaler]
git prov/git git Provisional [Dave_Thaler]
gizmoproject prov/gizmoproject gizmoproject Provisional [Dave_Thaler]
go go Permanent [RFC3368]
gopher The Gopher Protocol Permanent [RFC4266]
gtalk prov/gtalk gtalk Provisional [Dave_Thaler]
h323 H.323 Permanent [RFC3508]
ham ham Provisional [RFC7046]
hcp prov/hcp hcp Provisional [Alexey_Melnikov]
http Hypertext Transfer Protocol Permanent [RFC7230, Section 2.7.1]
https Hypertext Transfer Protocol Secure Permanent [RFC7230, Section 2.7.2]
iax Inter-Asterisk eXchange Version 2 Permanent [RFC5456]
icap Internet Content Adaptation Protocol Permanent [RFC3507]
icon icon Provisional [draft-lafayette-icon-uri-scheme]
im Instant Messaging Permanent [RFC3860]
imap internet message access protocol Permanent [RFC5092]
info Information Assets with Identifiers in Public Namespaces. [RFC4452] (section 3) defines an "info" registry of public namespaces, which is maintained by NISO and can be accessed from [http://info-uri.info/]. Permanent [RFC4452]
iotdisco prov/iotdisco iotdisco Provisional [Peter_Waher][http://www.iana.org/assignments/uri-schemes/prov/iotdisco.pdf]
ipn ipn Provisional [RFC6260]
ipp Internet Printing Protocol Permanent [RFC3510]
ipps Internet Printing Protocol over HTTPS Permanent [RFC7472]
irc prov/irc irc Provisional [Dave_Thaler]
irc6 prov/irc6 irc6 Provisional [Dave_Thaler]
ircs prov/ircs ircs Provisional [Dave_Thaler]
iris Internet Registry Information Service Permanent [RFC3981]
iris.beep iris.beep Permanent [RFC3983]
iris.lwz iris.lwz Permanent [RFC4993]
iris.xpc iris.xpc Permanent [RFC4992]
iris.xpcs iris.xpcs Permanent [RFC4992]
itms prov/itms itms Provisional [Dave_Thaler]
jabber perm/jabber jabber Permanent [Peter_Saint-Andre]
jar prov/jar jar Provisional [Dave_Thaler]
jms Java Message Service Provisional [RFC6167]
keyparc prov/keyparc keyparc Provisional [Dave_Thaler]
lastfm prov/lastfm lastfm Provisional [Dave_Thaler]
ldap Lightweight Directory Access Protocol Permanent [RFC4516]
ldaps prov/ldaps ldaps Provisional [Dave_Thaler]
magnet prov/magnet magnet Provisional [Dave_Thaler]
mailserver Access to data available from mail servers Historical [RFC6196]
mailto Electronic mail address Permanent [RFC6068]
maps prov/maps maps Provisional [Dave_Thaler]
market prov/market market Provisional [Dave_Thaler]
message prov/message message Provisional [Dave_Thaler]
mid message identifier Permanent [RFC2392]
mms prov/mms mms Provisional [Alexey_Melnikov]
modem modem Historical [RFC2806][RFC3966]
ms-help prov/ms-help ms-help Provisional [Alexey_Melnikov]
ms-settings prov/ms-settings ms-settings Provisional [urischemeowners_at_microsoft.com]
ms-settings-airplanemode prov/ms-settings-airplanemode ms-settings-airplanemode Provisional [urischemeowners_at_microsoft.com]
ms-settings-bluetooth prov/ms-settings-bluetooth ms-settings-bluetooth Provisional [urischemeowners_at_microsoft.com]
ms-settings-camera prov/ms-settings-camera ms-settings-camera Provisional [urischemeowners_at_microsoft.com]
ms-settings-cellular prov/ms-settings-cellular ms-settings-cellular Provisional [urischemeowners_at_microsoft.com]
ms-settings-cloudstorage prov/ms-settings-cloudstorage ms-settings-cloudstorage Provisional [urischemeowners_at_microsoft.com]
ms-settings-emailandaccounts prov/ms-settings-emailandaccounts ms-settings-emailandaccounts Provisional [urischemeowners_at_microsoft.com]
ms-settings-language prov/ms-settings-language ms-settings-language Provisional [urischemeowners_at_microsoft.com]
ms-settings-location prov/ms-settings-location ms-settings-location Provisional [urischemeowners_at_microsoft.com]
ms-settings-lock prov/ms-settings-lock ms-settings-lock Provisional [urischemeowners_at_microsoft.com]
ms-settings-nfctransactions prov/ms-settings-nfctransactions ms-settings-nfctransactions Provisional [urischemeowners_at_microsoft.com]
ms-settings-notifications prov/ms-settings-notifications ms-settings-notifications Provisional [urischemeowners_at_microsoft.com]
ms-settings-power prov/ms-settings-power ms-settings-power Provisional [urischemeowners_at_microsoft.com]
ms-settings-privacy prov/ms-settings-privacy ms-settings-privacy Provisional [urischemeowners_at_microsoft.com]
ms-settings-proximity prov/ms-settings-proximity ms-settings-proximity Provisional [urischemeowners_at_microsoft.com]
ms-settings-screenrotation prov/ms-settings-screenrotation ms-settings-screenrotation Provisional [urischemeowners_at_microsoft.com]
ms-settings-wifi prov/ms-settings-wifi ms-settings-wifi Provisional [urischemeowners_at_microsoft.com]
ms-settings-workplace prov/ms-settings-workplace ms-settings-workplace Provisional [urischemeowners_at_microsoft.com]
msnim prov/msnim msnim Provisional [Alexey_Melnikov]
msrp Message Session Relay Protocol Permanent [RFC4975]
msrps Message Session Relay Protocol Secure Permanent [RFC4975]
mtqp Message Tracking Query Protocol Permanent [RFC3887]
mumble prov/mumble mumble Provisional [Dave_Thaler]
mupdate Mailbox Update (MUPDATE) Protocol Permanent [RFC3656]
mvn prov/mvn mvn Provisional [Dave_Thaler]
news USENET news Permanent [RFC5538]
nfs network file system protocol Permanent [RFC2224]
ni ni Permanent [RFC6920]
nih nih Permanent [RFC6920]
nntp USENET news using NNTP access Permanent [RFC5538]
notes prov/notes notes Provisional [Dave_Thaler]
oid prov/oid oid Provisional [draft-larmouth-oid-iri]
opaquelocktoken opaquelocktokent Permanent [RFC4918]
pack historic/pack pack Historical [draft-shur-pack-uri-scheme]
palm prov/palm palm Provisional [Dave_Thaler]
paparazzi prov/paparazzi paparazzi Provisional [Dave_Thaler]
pkcs11 PKCS#11 Permanent [RFC7512]
platform prov/platform platform Provisional [Dave_Thaler]
pop Post Office Protocol v3 Permanent [RFC2384]
pres Presence Permanent [RFC3859]
prospero Prospero Directory Service Historical [RFC4157]
proxy prov/proxy proxy Provisional [Dave_Thaler]
psyc prov/psyc psyc Provisional [Dave_Thaler]
query prov/query query Provisional [Dave_Thaler]
redis prov/redis redis Provisional [Chris_Rebert]
rediss prov/rediss rediss Provisional [Chris_Rebert]
reload reload Permanent [RFC6940]
res prov/res res Provisional [Alexey_Melnikov]
resource prov/resource resource Provisional [Dave_Thaler]
rmi prov/rmi rmi Provisional [Dave_Thaler]
rsync rsync Provisional [RFC5781]
rtmfp prov/rtmfp rtmfp Provisional [RFC7425]
rtmp prov/rtmp rtmp Provisional [Dave_Thaler]
rtsp Real-time Streaming Protocol (RTSP) Permanent [RFC2326][RFC-ietf-mmusic-rfc2326bis-40]
rtsps Real-time Streaming Protocol (RTSP) over TLS Permanent [RFC2326][RFC-ietf-mmusic-rfc2326bis-40]
rtspu Real-time Streaming Protocol (RTSP) over unreliable datagram transport Permanent [RFC2326]
secondlife prov/secondlife query Provisional [Dave_Thaler]
service service location Permanent [RFC2609]
session session Permanent [RFC6787]
sftp prov/sftp query Provisional [Dave_Thaler]
sgn prov/sgn sgn Provisional [Dave_Thaler]
shttp Secure Hypertext Transfer Protocol Permanent [RFC2660]
sieve ManageSieve Protocol Permanent [RFC5804]
sip session initiation protocol Permanent [RFC3261]
sips secure session initiation protocol Permanent [RFC3261]
skype prov/skype skype Provisional [Alexey_Melnikov]
smb prov/smb smb Provisional [Dave_Thaler]
sms Short Message Service Permanent [RFC5724]
smtp prov/smtp smtp Provisional [draft-melnikov-smime-msa-to-mda]
snews NNTP over SSL/TLS Historical [RFC5538]
snmp Simple Network Management Protocol Permanent [RFC4088]
soap.beep soap.beep Permanent [RFC4227]
soap.beeps soap.beeps Permanent [RFC4227]
soldat prov/soldat soldat Provisional [Dave_Thaler]
spotify prov/spotify spotify Provisional [Dave_Thaler]
ssh prov/ssh ssh Provisional [Dave_Thaler]
steam prov/steam steam Provisional [Dave_Thaler]
stun stun Permanent [RFC7064]
stuns stuns Permanent [RFC7064]
submit prov/submit submit Provisional [draft-melnikov-smime-msa-to-mda]
svn prov/svn svn Provisional [Dave_Thaler]
tag tag Permanent [RFC4151]
teamspeak prov/teamspeak teamspeak Provisional [Dave_Thaler]
tel telephone Permanent [RFC3966]
teliaeid prov/teliaeid teliaeid Provisional [Peter_Lewandowski]
telnet Reference to interactive sessions Permanent [RFC4248]
tftp Trivial File Transfer Protocol Permanent [RFC3617]
things prov/things things Provisional [Dave_Thaler]
thismessage perm/thismessage multipart/related relative reference resolution Permanent [RFC2557]
tip Transaction Internet Protocol Permanent [RFC2371]
tn3270 Interactive 3270 emulation sessions Permanent [RFC6270]
turn turn Permanent [RFC7065]
turns turns Permanent [RFC7065]
tv TV Broadcasts Permanent [RFC2838]
udp prov/udp udp Provisional [Dave_Thaler]
unreal prov/unreal unreal Provisional [Dave_Thaler]
urn Uniform Resource Names Permanent [RFC2141][IANA registry urn-namespaces]
ut2004 prov/ut2004 ut2004 Provisional [Dave_Thaler]
vemmi versatile multimedia interface Permanent [RFC2122]
ventrilo prov/ventrilo ventrilo Provisional [Dave_Thaler]
videotex historic/videotex videotex Historical [draft-mavrakis-videotex-url-spec][RFC2122][RFC3986]
view-source prov/view-source view-source Provisional [Mykyta_Yevstifeyev]
wais Wide Area Information Servers Historical [RFC4156]
webcal prov/webcal webcal Provisional [Dave_Thaler]
ws WebSocket connections Permanent [RFC6455]
wss Encrypted WebSocket connections Permanent [RFC6455]
wtai prov/wtai wtai Provisional [Dave_Thaler]
wyciwyg prov/wyciwyg wyciwyg Provisional [Dave_Thaler]
xcon xcon Permanent [RFC6501]
xcon-userid xcon-userid Permanent [RFC6501]
xfire prov/xfire xfire Provisional [Dave_Thaler]
xmlrpc.beep xmlrpc.beep Permanent [RFC3529]
xmlrpc.beeps xmlrpc.beeps Permanent [RFC3529]
xmpp Extensible Messaging and Presence Protocol Permanent [RFC5122]
xri prov/xri xri Provisional [Dave_Thaler]
ymsgr prov/ymsgr ymsgr Provisional [Dave_Thaler]
z39.50 Z39.50 information access Historical [RFC1738][RFC2056]
z39.50r Z39.50 Retrieval Permanent [RFC2056]
z39.50s Z39.50 Session Permanent [RFC2056]


ID Name Contact URI Last Updated
[Alexey_Melnikov] Alexey Melnikov mailto:alexey.melnikov&isode.com 2012-09-12
[Bíró_Tamás] Bíró Tamás mailto:tamas.biro&sensenet.com 2014-05-16
[Bob_Van_Zant] Bob Van Zant mailto:bob&veznat.com 2011-11-14
[Chris_Rebert] Chris Rebert mailto:iana.url.schemes&chrisrebert.com 2015-07-21
[Dave_Thaler] Dave Thaler mailto:dthaler&microsoft.com 2012-09-23
[DLNA] DLNA mailto:admin&dlna.org 2012-01-04
[Hans-Dieter_A._Hiep] Hans-Dieter A. Hiep mailto:info&aexiz.com 2015-08-05
[Mirko_Nosenzo] Mirko Nosenzo mailto:mirko.n&incomedia.eu 2013-09-20
[Mykyta_Yevstifeyev] Mykyta Yevstifeyev mailto:evnikita2&gmail.com 2011-05-25
[OMA-OMNA] OMNA – Open Mobile Naming Authority of the Open Mobile Alliance mailto:OMA-OMNA&mail.openmobilealliance.org 2014-12-19
[Peter_Lewandowski] Peter Lewandowski mailto:peter.lewandowski&cygate.se 2014-09-12
[Peter_Saint-Andre] Peter Saint-Andre mailto:stpeter&jabber.org 2012-12-04
[Peter_Waher] Peter Waher mailto:Peter.Waher&clayster.com 2015-08-07
[urischemeowners_at_microsoft.com] urischemeowners at microsoft.com mailto:urischemeowners&microsoft.com 2015-07-30
[W3C_WebApps_Working_Group] W3C WebApps Working Group mailto:public-webapps&w3.org 2015-07-17