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Uniform Resource Identifier (URI) Schemes

per [RFC4395]

[RFC4395] defines an IANA-maintained registry of URI Schemes. These registries include the Permanent and Provisional URI Schemes.

Permanent URI Schemes

URI Scheme
Description
Reference
aaa Diameter Protocol [RFC6733]
aaas Diameter Protocol with Secure Transport [RFC6733]
about about [RFC6694]
acap application configuration access protocol [RFC2244]
cap Calendar Access Protocol [RFC4324]
cid content identifier [RFC2392]
crid TV-Anytime Content Reference Identifier [RFC4078]
data data [RFC2397]
dav dav [RFC4918]
dict dictionary service protocol [RFC2229]
dns Domain Name System [RFC4501]
file Host-specific file names [RFC1738]
ftp File Transfer Protocol [RFC1738]
geo Geographic Locations [RFC5870]
go go [RFC3368]
gopher The Gopher Protocol [RFC4266]
h323 H.323 [RFC3508]
http Hypertext Transfer Protocol [RFC2616]
https Hypertext Transfer Protocol Secure [RFC2818]
iax Inter-Asterisk eXchange Version 2 [RFC5456]
icap Internet Content Adaptation Protocol [RFC3507]
im Instant Messaging [RFC3860]
imap internet message access protocol [RFC5092]
info Information Assets with Identifiers in Public Namespaces [RFC4452]
ipp Internet Printing Protocol [RFC3510]
iris Internet Registry Information Service [RFC3981]
iris.beep iris.beep [RFC3983]
iris.xpc iris.xpc [RFC4992]
iris.xpcs iris.xpcs [RFC4992]
iris.lwz iris.lwz [RFC4993]
jabber jabber [Saint-Andre]
ldap Lightweight Directory Access Protocol [RFC4516]
mailto Electronic mail address [RFC6068]
mid message identifier [RFC2392]
msrp Message Session Relay Protocol [RFC4975]
msrps Message Session Relay Protocol Secure [RFC4975]
mtqp Message Tracking Query Protocol [RFC3887]
mupdate Mailbox Update (MUPDATE) Protocol [RFC3656]
news USENET news [RFC5538]
nfs network file system protocol [RFC2224]
ni ni [RFC6920]
nih nih [RFC6920]
nntp USENET news using NNTP access [RFC5538]
opaquelocktoken opaquelocktokent [RFC4918]
pop Post Office Protocol v3 [RFC2384]
pres Presence [RFC3859]
reload reload [RFC-ietf-p2psip-base-26]
rtsp real time streaming protocol [RFC2326]
service service location [RFC2609]
session session [RFC6787]
shttp Secure Hypertext Transfer Protocol [RFC2660]
sieve ManageSieve Protocol [RFC5804]
sip session initiation protocol [RFC3261]
sips secure session initiation protocol [RFC3261]
sms Short Message Service [RFC5724]
snmp Simple Network Management Protocol [RFC4088]
soap.beep soap.beep [RFC4227]
soap.beeps soap.beeps [RFC4227]
tag tag [RFC4151]
tel telephone [RFC3966]
telnet Reference to interactive sessions [RFC4248]
tftp Trivial File Transfer Protocol [RFC3617]
thismessage multipart/related relative reference resolution [RFC2557]
tn3270 Interactive 3270 emulation sessions [RFC6270]
tip Transaction Internet Protocol [RFC2371]
tv TV Broadcasts [RFC2838]
urn Uniform Resource Names (click for registry) [RFC2141]
vemmi versatile multimedia interface [RFC2122]
ws WebSocket connections [RFC6455]
wss Encrypted WebSocket connections [RFC6455]
xcon xcon [RFC6501]
xcon-userid xcon-userid [RFC6501]
xmlrpc.beep xmlrpc.beep [RFC3529]
xmlrpc.beeps xmlrpc.beeps [RFC3529]
xmpp Extensible Messaging and Presence Protocol [RFC5122]
z39.50r Z39.50 Retrieval [RFC2056]
z39.50s Z39.50 Session [RFC2056]

Provisional URI Schemes

URI Scheme
Description
Reference
adiumxtra adiumxtra [Thaler]
afp afp [Thaler]
afs Andrew File System global file names [RFC1738]
aim aim [Thaler]
apt apt [Thaler]
attachment attachment [Thaler]
aw aw [Thaler]
beshare beshare [Thaler]
bitcoin bitcoin [Thaler]
bolo bolo [Thaler]
callto callto [Melnikov]
chrome chrome [Thaler]
chrome-extension chrome-extension [Thaler]
com-eventbrite-attendee com-eventbrite-attendee [Van Zant]
content content [Thaler]
cvs cvs [Thaler]
dlna-playsingle dlna-playsingle [DLNA]
dlna-playcontainer dlna-playcontainer [DLNA]
dtn DTNRG research and development [RFC5050]
dvb dvb [draft-mcroberts-uri-dvb]
ed2k ed2k [Thaler]
facetime facetime [Thaler]
feed feed [Thaler]
finger finger [Thaler]
fish fish [Thaler]
gg gg [Thaler]
git git [Thaler]
gizmoproject gizmoproject [Thaler]
gtalk gtalk [Thaler]
hcp hcp [Melnikov]
icon icon [draft-lafayette-icon-uri-scheme]
ipn ipn [RFC6260]
irc irc [Thaler]
irc6 irc6 [Thaler]
ircs ircs [Thaler]
itms itms [Thaler]
jar jar [Thaler]
jms Java Message Service [RFC6167]
keyparc keyparc [Thaler]
lastfm lastfm [Thaler]
ldaps ldaps [Thaler]
magnet magnet [Thaler]
maps maps [Thaler]
market market [Thaler]
message message [Thaler]
mms mms [Melnikov]
ms-help ms-help [Melnikov]
msnim msnim [Melnikov]
mumble mumble [Thaler]
mvn mvn [Thaler]
notes notes [Thaler]
oid oid [draft-larmouth-oid-iri]
palm palm [Thaler]
paparazzi paparazzi [Thaler]
platform platform [Thaler]
proxy proxy [Thaler]
psyc psyc [Thaler]
query query [Thaler]
res res [Melnikov]
resource resource [Thaler]
rmi rmi [Thaler]
rsync rsync [RFC5781]
rtmp rtmp [Thaler]
secondlife query [Thaler]
sftp query [Thaler]
sgn sgn [Thaler]
skype skype [Melnikov]
smb smb [Thaler]
soldat soldat [Thaler]
spotify spotify [Thaler]
ssh ssh [Thaler]
steam steam [Thaler]
svn svn [Thaler]
teamspeak teamspeak [Thaler]
things things [Thaler]
udp udp [Thaler]
unreal unreal [Thaler]
ut2004 ut2004 [Thaler]
ventrilo ventrilo [Thaler]
view-source view-source [Yevstifeyev]
webcal webcal [Thaler]
wtai wtai [Thaler]
wyciwyg wyciwyg [Thaler]
xfire xfire [Thaler]
xri xri [Thaler]
ymsgr ymsgr [Thaler]

Historical URI Schemes

URI Scheme
Description
Reference
fax fax [RFC2806][RFC3966]
mailserver Access to data available from mail servers [RFC6196]
modem modem [RFC2806][RFC3966]
pack pack [draft-shur-pack-uri-scheme]
prospero Prospero Directory Service [RFC4157]
snews NNTP over SSL/TLS [RFC5538]
videotex videotex [draft-mavrakis-videotex-url-spec]
[RFC2122]
[RFC3986]
wais Wide Area Information Servers [RFC4156]
z39.50 Z39.50 information access [RFC1738][RFC2056]
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Page updated 2013-04-23
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