URI schemes (IANA registry)

Source: https://aidb.si/d/uri-schemes — Source: Internet Assigned Numbers Authority (IANA), URI Schemes registry.

Scheme	Description	Status	Well-known URIs	CRI scheme number	Defining RFC	References
aaa	Diameter Protocol	Permanent		13862	6733	RFC 6733
aaas	Diameter Protocol with Secure Transport	Permanent		14526	6733	RFC 6733
about	about	Permanent		3786	6694	RFC 6694
acap	application configuration access protocol	Permanent		12705	2244	RFC 2244
acct	acct	Permanent		10229	7565	RFC 7565
acd	acd	Provisional		6840
ace	ace	Provisional		26
aceap	aceap	Provisional		1034
acedp	acedp	Provisional		1035
aceep	aceep	Provisional		1036
acelp	acelp	Provisional		1037
aceup	aceup	Provisional		1038
acr	acr	Provisional		10196		OMA-OMNA
adiumxtra	adiumxtra	Provisional		6634
adt	adt	Provisional		5150		SAP SE
aet	aet	Provisional		1020
afp	afp	Provisional		13404
afs	Andrew File System global file names	Provisional		10687	1738	RFC 1738
agtp	agtp	Provisional		1006
aim	aim	Provisional		10327
alter	alter	Provisional		1031		draft-morrison-alter-uri-scheme-03
amss	amss	Provisional		10831
android	android	Provisional		15061		https://developer.android.com/guide/topics/manifest/manifest-intro
appdata	appdata	Provisional		7364
apt	apt	Provisional		7856
ar	ar	Provisional		5099
ari	ari	Provisional		3818		draft-ietf-dtn-ari-04
ark	ark	Provisional		3018		https://n2t.net/ark:/21206/10015
ars	ars	Provisional		1025		draft-juwan-ars-uri-00
arv	arv	Provisional		1032
at	at (see [reviewer notes])	Provisional		6007
attachment	attachment	Provisional		8577
aw	aw	Provisional		16051
barion	barion	Provisional		10225
bb	bb	Historical		5188		IESG
beshare	beshare	Provisional		4674
bitcoin	bitcoin	Provisional		9186
bitcoincash	bitcoincash	Provisional		7226
bl	bluetooth (shortened)	Provisional		10024
blob	blob	Provisional		11060
bluetooth	bluetooth	Provisional		12052
bolo	bolo	Provisional		8765
brid	brid	Provisional		8251
browserext	browserext	Provisional		4327
cabal	cabal	Provisional		11393
caip	caip	Provisional		1001
calculator	calculator	Provisional		3783
callto	callto	Provisional		8713
canactid	canactid	Provisional		1033		draft-schrock-canonical-action-identifier-05
cap	Calendar Access Protocol	Permanent		9204	4324	RFC 4324
cast	cast	Provisional		1220		https://developers.google.com/cast/docs/registration
casts	casts	Provisional		12718		https://developers.google.com/cast/docs/registration
chrome	chrome	Provisional		5728
chrome-extension	chrome-extension	Provisional		14667
cid	content identifier	Permanent		15202	2392	RFC 2392
cm	cm	Provisional		1021
coap	coap	Permanent	[RFC 7252]	0	7252	RFC 7252
coap+tcp	coap+tcp (see [reviewer notes])	Permanent	[RFC 8323]	6	8323	RFC 8323
coap+ws	coap+ws (see [reviewer notes])	Permanent	[RFC 8323]	24	8323	RFC 8323
coaps	coaps	Permanent	[RFC 7252]	1	7252	RFC 7252
coaps+tcp	coaps+tcp (see [reviewer notes])	Permanent	[RFC 8323]	7	8323	RFC 8323
coaps+ws	coaps+ws (see [reviewer notes])	Permanent	[RFC 8323]	25	8323	RFC 8323
com-eventbrite-attendee	com-eventbrite-attendee	Provisional		9278
content	content	Provisional		8387
content-type	content-type	Provisional		6030
crid	TV-Anytime Content Reference Identifier	Permanent		5990	4078	RFC 4078
cstr	cstr	Provisional		6730
cttps	cttps	Provisional		1007
cvs	cvs	Provisional		12242
dab	dab	Provisional		6774
dat	dat	Provisional		10583
data	data	Permanent		1946	2397	RFC 2397
dav	dav	Permanent		4373	4918	RFC 4918
dhttp	dhttp (see [reviewer notes])	Provisional		4549
diaspora	diaspora	Provisional		4598
dict	dictionary service protocol	Permanent		3886	2229	RFC 2229
did	did	Provisional		5
dilithium3	dilithium3	Provisional		1005
dis	dis	Provisional		17134
dlna-playcontainer	dlna-playcontainer	Provisional		5557		DLNA
dlna-playsingle	dlna-playsingle	Provisional		6144		DLNA
dnp	dnp	Provisional		15819
dns	Domain Name System	Permanent		12932	4501	RFC 4501
dntp	dntp	Provisional		14347
doi	doi	Permanent		13014
donau	donau	Provisional		10150		draft-grothoff-donau-02
dpp	dpp	Provisional		2442
drm	drm	Provisional		9859
drop	drop	Historical		16138		IESG
dtmi	dtmi	Provisional		17097
dtn	DTNRG research and development	Permanent		7456	9171	RFC 9171
dvb	dvb	Provisional		10380		draft-mcroberts-uri-dvb-09
dvx	dvx	Provisional		11645
dweb	dweb	Provisional		1328
ed2k	ed2k	Provisional		2790
eid	eid	Provisional		4929
elsi	elsi	Provisional		13680
embedded	embedded	Provisional		4193
ens	ens	Provisional		1982
esim	esim	Provisional		3032
ethereum	ethereum	Provisional		7913
example	example	Permanent		5296	7595	RFC 7595
ez	ez	Provisional		1010
facetime	facetime	Provisional		3795
fax	fax	Historical		4053	2806	RFC 2806; RFC 3966
feed	feed	Provisional		7520
feedready	feedready	Provisional		11824
fido	fido	Provisional		5717
file	Host-specific file names	Permanent		12068	8089	RFC 8089
filesystem	filesystem	Historical		3365
finger	finger	Provisional		17315
first-run-pen-experience	first-run-pen-experience	Provisional		16069
fish	fish	Provisional		12634
fm	fm	Provisional		2806
ftp	File Transfer Protocol	Permanent		14878	1738	RFC 1738
fuchsia-pkg	fuchsia-pkg	Provisional		12806		https://fuchsia.googlesource.com/fuchsia/
gcx	gcx	Provisional		1019
gdsi	gdsi	Provisional		1022
geo	Geographic Locations	Permanent		3342	5870	RFC 5870
gg	gg	Provisional		11055
git	git	Provisional		13068
gitoid	gitoid	Provisional		3775
gizmoproject	gizmoproject	Provisional		10744
go	go	Permanent		5705	3368	RFC 3368
gopher	The Gopher Protocol	Permanent		8601	4266	RFC 4266
graph	graph	Provisional		11583
grd	grd	Historical		9444		IESG
gsos	gsos	Provisional		1028		https://www.iana.org/assignments/uri-schemes/prov/gsos.pdf
gtalk	gtalk	Provisional		4709
h323	H.323	Permanent		10317	3508	RFC 3508
haie	haie	Provisional		1039		FUTURO ITALIA GARD
ham	ham	Provisional		6503	7046	RFC 7046
hcap	hcap	Provisional		9875
hcp	hcp	Provisional		6024
hs20	hs20	Provisional		1273
http	Hypertext Transfer Protocol	Permanent	[RFC 8615]	2	9110	RFC 9110, Section 4.2.1
https	Hypertext Transfer Protocol Secure	Permanent	[RFC 8615]	3	9110	RFC 9110, Section 4.2.2
hxxp	hxxp	Provisional		16728		draft-salgado-hxxp-01
hxxps	hxxps	Provisional		4714		draft-salgado-hxxp-01
hydrazone	hydrazone	Provisional		6632		https://tech.hydrazone.pro/uri/specification/hydrazone.txt
hyper	hyper	Provisional		12876
i0	i0	Provisional		10328
iax	Inter-Asterisk eXchange Version 2	Permanent		7126	5456	RFC 5456
ibi	ibi	Provisional		1002
ibi-	ibi-	Provisional		1003
icap	Internet Content Adaptation Protocol	Permanent		12566	3507	RFC 3507
icon	icon	Provisional		14868		draft-lafayette-icon-uri-scheme-01
ilstring	ilstring	Provisional		12237		https://webstore.iec.ch/en/publication/77973
im	Instant Messaging	Permanent		6883	3860	RFC 3860
imap	internet message access protocol	Permanent		10119	5092	RFC 5092
info	Information Assets with Identifiers in Public Namespaces. [RFC 4452 (Section 3)] defines an "info" registry of public namespaces, which is maintained by NISO and can be accessed from [http://info-uri.info/].	Permanent		13846	4452	RFC 4452
interaction	interaction	Provisional		1023
iotdisco	iotdisco	Provisional		17170		https://www.iana.org/assignments/uri-schemes/prov/iotdisco.pdf
ipfs	ipfs	Provisional		15972
ipn	ipn	Permanent		8775	9758	RFC 9758
ipns	ipns	Provisional		16933
ipp	Internet Printing Protocol	Permanent		9318	3510	RFC 3510
ipps	Internet Printing Protocol over HTTPS	Permanent		4419	7472	RFC 7472
iqa	iqa	Provisional		28		draft-li-rttp-iqa-addressing-02; https://iqa.org/URI/
irc	irc	Provisional		5425
irc6	irc6	Provisional		1905
ircs	ircs	Provisional		8687
iris	Internet Registry Information Service	Permanent		13986	3981	RFC 3981
iris.beep	iris.beep	Permanent		15639	3983	RFC 3983
iris.lwz	iris.lwz	Permanent		4590	4993	RFC 4993
iris.xpc	iris.xpc	Permanent		12422	4992	RFC 4992
iris.xpcs	iris.xpcs	Permanent		16134	4992	RFC 4992
isostore	isostore	Provisional		7225
itms	itms	Provisional		14830
jabber	jabber	Permanent		6109
jar	jar	Provisional		1578
jms	Java Message Service	Provisional		3634	6167	RFC 6167
keyparc	keyparc	Provisional		9770
lastfm	lastfm	Provisional		11742
lbry	lbry	Provisional		14010
ldap	Lightweight Directory Access Protocol	Permanent		13442	4516	RFC 4516
ldaps	ldaps	Provisional		3906
leaptofrogans	leaptofrogans	Permanent		16281	8589	RFC 8589
lid	lid	Provisional		10247		IS4
linkid	linkid	Provisional		1819
locus	locus	Provisional		1029		draft-subthought-locus-uri-scheme-00
lorawan	lorawan	Provisional		11718		OMA-DMSE
lpa	lpa	Provisional		6658
lvlt	lvlt	Provisional		5480
machineProvisioningProgressReporter	Windows Autopilot Modern Device Management status updates	Provisional		5477
magnet	magnet	Provisional		9805
mailserver	Access to data available from mail servers	Historical		10868	6196	RFC 6196
mailto	Electronic mail address	Permanent		12102	6068	RFC 6068
maps	maps	Provisional		14153
market	market	Provisional		14595
matrix	matrix	Provisional		9487
mdoc	mdoc	Provisional		1013		ISO IEC JTC1 SC17
mdoc-openid4vp	mdoc-openid4vp	Provisional		1012		ISO IEC JTC1 SC17
message	message	Provisional		14460
microsoft.windows.camera	microsoft.windows.camera	Provisional		11857
microsoft.windows.camera.multipicker	microsoft.windows.camera.multipicker	Provisional		7942
microsoft.windows.camera.picker	microsoft.windows.camera.picker	Provisional		5883
mid	message identifier	Permanent		3646	2392	RFC 2392
mms	mms	Provisional		12337
modem	modem	Historical		9154	2806	RFC 2806; RFC 3966
mongodb	mongodb	Provisional		13372
moz	moz	Provisional		6808
mqtt	mqtt	Provisional		10740
mqtts	mqtts	Provisional		14906
ms-access	ms-access	Provisional		6863
ms-appinstaller	ms-appinstaller	Provisional		5152
ms-browser-extension	ms-browser-extension	Provisional		14090
ms-calculator	ms-calculator	Provisional		3690
ms-clicktocommunicate	ms-clicktocommunicate	Provisional		1042
ms-drive-to	ms-drive-to	Provisional		4102
ms-enrollment	ms-enrollment	Provisional		14310
ms-excel	ms-excel	Provisional		5536
ms-eyecontrolspeech	ms-eyecontrolspeech	Provisional		17381
ms-gamebarservices	ms-gamebarservices	Provisional		12823
ms-gamingoverlay	ms-gamingoverlay	Provisional		1059
ms-getoffice	ms-getoffice	Provisional		14366
ms-help	ms-help	Provisional		7809
ms-infopath	ms-infopath	Provisional		8830
ms-inputapp	ms-inputapp	Provisional		6792
ms-launchremotedesktop	ms-launchremotedesktop	Provisional		12174
ms-lockscreencomponent-config	ms-lockscreencomponent-config	Provisional		12525
ms-media-stream-id	ms-media-stream-id	Provisional		6388
ms-meetnow	ms-meetnow	Provisional		15645
ms-mixedrealitycapture	ms-mixedrealitycapture	Provisional		6411
ms-mobileplans	ms-mobileplans	Provisional		11945
ms-newsandinterests	ms-newsandinterests	Provisional		2945
ms-officeapp	ms-officeapp	Provisional		14168
ms-people	ms-people	Provisional		1528
ms-personacard	ms-personacard	Provisional		1562
ms-powerpoint	ms-powerpoint	Provisional		16645
ms-project	ms-project	Provisional		11130
ms-publisher	ms-publisher	Provisional		16194
ms-recall	ms-recall	Provisional		10183
ms-remotedesktop	ms-remotedesktop	Provisional		5347
ms-remotedesktop-launch	ms-remotedesktop-launch	Provisional		8085
ms-restoretabcompanion	ms-restoretabcompanion	Provisional		17175
ms-screenclip	ms-screenclip	Provisional		10518
ms-screensketch	ms-screensketch	Provisional		9453
ms-search	ms-search	Provisional		14034
ms-search-repair	ms-search-repair	Provisional		15679
ms-secondary-screen-controller	ms-secondary-screen-controller	Provisional		13098
ms-secondary-screen-setup	ms-secondary-screen-setup	Provisional		15254
ms-settings	ms-settings	Provisional		9075
ms-settings-airplanemode	ms-settings-airplanemode	Provisional		5109
ms-settings-bluetooth	ms-settings-bluetooth	Provisional		14180
ms-settings-camera	ms-settings-camera	Provisional		15773
ms-settings-cellular	ms-settings-cellular	Provisional		15361
ms-settings-cloudstorage	ms-settings-cloudstorage	Provisional		10640
ms-settings-connectabledevices	ms-settings-connectabledevices	Provisional		11351
ms-settings-displays-topology	ms-settings-displays-topology	Provisional		12029
ms-settings-emailandaccounts	ms-settings-emailandaccounts	Provisional		11072
ms-settings-language	ms-settings-language	Provisional		9981
ms-settings-location	ms-settings-location	Provisional		10373
ms-settings-lock	ms-settings-lock	Provisional		11950
ms-settings-nfctransactions	ms-settings-nfctransactions	Provisional		10591
ms-settings-notifications	ms-settings-notifications	Provisional		7868
ms-settings-power	ms-settings-power	Provisional		13026
ms-settings-privacy	ms-settings-privacy	Provisional		9198
ms-settings-proximity	ms-settings-proximity	Provisional		3959
ms-settings-screenrotation	ms-settings-screenrotation	Provisional		6755
ms-settings-wifi	ms-settings-wifi	Provisional		15994
ms-settings-workplace	ms-settings-workplace	Provisional		14936
ms-spd	ms-spd	Provisional		6189
ms-stickers	ms-stickers	Provisional		10361
ms-sttoverlay	ms-sttoverlay	Provisional		5410
ms-transit-to	ms-transit-to	Provisional		7743
ms-useractivityset	ms-useractivityset	Provisional		9136
ms-uup	ms-uup	Provisional		1560
ms-virtualtouchpad	ms-virtualtouchpad	Provisional		15776
ms-visio	ms-visio	Provisional		15163
ms-walk-to	ms-walk-to	Provisional		14364
ms-whiteboard	ms-whiteboard	Provisional		11467
ms-whiteboard-cmd	ms-whiteboard-cmd	Provisional		14860
ms-widgetboard	ms-widgetboard	Provisional		12603
ms-widgets	ms-widgets	Provisional		4613
ms-word	ms-word	Provisional		16585
msnim	msnim	Provisional		8041
msrp	Message Session Relay Protocol	Permanent		11315	4975	RFC 4975
msrps	Message Session Relay Protocol Secure	Permanent		13440	4975	RFC 4975; RFC 8873
mss	mss	Provisional		12493
mt	Matter protocol on-boarding payloads that are encoded for use in QR Codes and/or NFC Tags	Permanent		12699
mtqp	Message Tracking Query Protocol	Permanent		3358	3887	RFC 3887
mtrust	mtrust	Provisional		13062
mumble	mumble	Provisional		11804
mupdate	Mailbox Update (MUPDATE) Protocol	Permanent		12569	3656	RFC 3656
musik	musik	Provisional		1014
mvn	mvn	Provisional		9585
mvrp	mvrp (see [reviewer notes])	Provisional		13451
mvrps	mvrps (see [reviewer notes])	Provisional		13228
news	USENET news	Permanent		1895	5538	RFC 5538
nfs	network file system protocol	Permanent		6516	2224	RFC 2224
ni	ni	Permanent		10926	6920	RFC 6920
nih	nih	Permanent		11428	6920	RFC 6920
nntp	USENET news using NNTP access	Permanent		13499	5538	RFC 5538
nostr	nostr	Provisional		1017		https://github.com/nostr-protocol/nostr
notes	notes	Provisional		8766		draft-dconmy-notes-uri-scheme-02
npamp	npamp	Provisional		1009		draft-bubblefish-npamp-00
num	Namespace Utility Modules	Provisional		9965		https://www.numprotocol.com/specification
ocf	ocf	Provisional		10241
oid	oid	Provisional		16079		draft-larmouth-oid-iri-04
onenote	onenote	Provisional		13608
onenote-cmd	onenote-cmd	Provisional		16632
op	op	Provisional		1040
opaquelocktoken	opaquelocktokent	Permanent		6341	4918	RFC 4918
openid	OpenID Connect	Provisional		1242
openpgp4fpr	openpgp4fpr	Provisional		13094
opns	opns	Provisional		30
ord	ord	Provisional		256
ordmail	ordmail	Provisional		257
otpauth	otpauth	Provisional		13829
p1	p1	Historical		14982		IESG
pack	pack	Historical		13348		draft-shur-pack-uri-scheme-05
palm	palm	Provisional		10238
paparazzi	paparazzi	Provisional		12599
payment	payment	Historical		1762		IESG
payto	payto	Provisional		6992	8905	RFC 8905
pbcp	pbcp	Provisional		1043
pkcs11	PKCS#11	Permanent		9312	7512	RFC 7512
pkg	pkg	Provisional		1018
platform	platform	Provisional		2754
pop	Post Office Protocol v3	Permanent		10551	2384	RFC 2384
pres	Presence	Permanent		14972	3859	RFC 3859
prospero	Prospero Directory Service	Historical		14477	4157	RFC 4157
proxy	proxy	Provisional		3503
psyc	psyc	Provisional		1466
pttp	pttp	Provisional		6903
pwid	pwid	Provisional		17068
qb	qb	Provisional		12478
query	query	Provisional		10147
quic-transport	quic-transport	Provisional		6462		draft-vvv-webtransport-quic-00
redis	redis	Provisional		8099
rediss	rediss	Provisional		9338
reload	reload	Permanent		12726	6940	RFC 6940
res	res	Provisional		4153
resource	resource	Provisional		2284
rmi	rmi	Provisional		16292
rsync	rsync	Provisional		16884	5781	RFC 5781
rtmfp	rtmfp	Provisional		3348	7425	RFC 7425
rtmp	rtmp	Provisional		3920
rtsp	Real-Time Streaming Protocol (RTSP)	Permanent		15267	2326	RFC 2326; RFC 7826
rtsps	Real-Time Streaming Protocol (RTSP) over TLS	Permanent		4619	2326	RFC 2326; RFC 7826
rtspu	Real-Time Streaming Protocol (RTSP) over unreliable datagram transport	Permanent		11999	2326	RFC 2326
rttp	rttp	Provisional		27		draft-li-rttp-iqa-addressing-02; https://rttp.com/URI/
sarif	sarif	Provisional		13650
secondlife	query	Provisional		16729
secret-token	secret-token	Provisional		7074	8959	RFC 8959
seki	seki	Provisional		1026
service	service location	Permanent		17264	2609	RFC 2609
session	session	Permanent		4355	6787	RFC 6787
sftp	query	Provisional		5492
sgn	sgn	Provisional		4882
shc	shc	Provisional		5823
shelter	shelter	Provisional		15461
shttp	Secure Hypertext Transfer Protocol	Permanent		7874	2660	RFC 2660
sieve	ManageSieve Protocol	Permanent		5472	5804	RFC 5804
simpleledger	simpleledger	Provisional		9544
simplex	simplex	Provisional		15118
sip	session initiation protocol	Permanent		12644	3261	RFC 3261
sips	secure session initiation protocol	Permanent		9535	3261	RFC 3261
skype	skype	Provisional		2326
smb	smb	Provisional		7285
smp	smp	Provisional		11533
sms	Short Message Service	Permanent		3524	5724	RFC 5724
smtp	smtp	Provisional		13340		draft-melnikov-smime-msa-to-mda-03
snews	NNTP over SSL/TLS	Historical		13285	5538	RFC 5538
snmp	Simple Network Management Protocol	Permanent		1165	4088	RFC 4088
sns	sns	Provisional		29
soap.beep	soap.beep	Permanent		8519	4227	RFC 4227
soap.beeps	soap.beeps	Permanent		16300	4227	RFC 4227
soldat	soldat	Provisional		6349
spacify	spacify	Provisional		1000
spiffe	spiffe	Provisional		8093
spotify	spotify	Provisional		12732
ssb	ssb	Provisional		12400
ssh	ssh	Provisional		7667
sss	sss	Provisional		555
starknet	starknet	Provisional		12458
steam	steam	Provisional		5134
stun	stun	Permanent		14627	7064	RFC 7064
stuns	stuns	Permanent		14901	7064	RFC 7064
submit	submit	Provisional		4951		draft-melnikov-smime-msa-to-mda-03
svn	svn	Provisional		13923
swh	swh	Provisional		17039
swid	swid (see [reviewer notes])	Provisional		14162	9393	RFC 9393, Section 5.1
swidpath	swidpath (see [reviewer notes])	Provisional		5825	9393	RFC 9393, Section 5.2
tag	tag	Permanent		16377	4151	RFC 4151
taler	taler	Provisional		2796		draft-grothoff-taler-01
tcxp	tcxp	Provisional		1030		https://github.com/typed-context-protocol/charter; https://www.w3.org/community/typed-context-protocol/
teamspeak	teamspeak	Provisional		6924
teapot	teapot	Provisional		15026
teapots	teapots	Provisional		3375
tel	telephone	Permanent		3143	3966	RFC 3966; RFC 5341
teliaeid	teliaeid	Provisional		13362
telnet	Reference to interactive sessions	Permanent		10995	4248	RFC 4248
tftp	Trivial File Transfer Protocol	Permanent		8300	3617	RFC 3617
things	things	Provisional		2154
thismessage	multipart/related relative reference resolution	Permanent		14367	2557	RFC 2557
thzp	thzp	Historical		11820		IESG
tii	tii	Provisional		1027
tip	Transaction Internet Protocol	Permanent		6651	2371	RFC 2371
tn3270	Interactive 3270 emulation sessions	Permanent		14962	6270	RFC 6270
tool	tool	Provisional		15230
tttps	TLS TimeToken Secure Protocol (TTTPS). A cryptographic temporal ordering proof protocol augmenting TLS 1.3 with Proof-of-Time records.	Provisional		1011		draft-helmprotocol-tttps-04
turn	turn	Permanent		10333	7065	RFC 7065
turns	turns	Permanent		1926	7065	RFC 7065
tv	TV Broadcasts	Permanent		7923	2838	RFC 2838
udp	udp	Provisional		5217
unreal	unreal	Provisional		15206
upn	upn	Provisional		1004
upt	upt	Historical		2747		IESG
urn	Uniform Resource Names	Permanent		4	8141	RFC 8141
ust	ust	Provisional		1016		THE LAB; https://github.com/thelabmd/UST-Protocol/blob/main/spec/UST-1.0.md
ut2004	ut2004	Provisional		6609
uuaid	uuaid	Provisional		1015
uuid-in-package	uuid-in-package	Provisional		4515
v-event	v-event	Provisional		15579		draft-menderico-v-event-uri-00
vemmi	versatile multimedia interface	Permanent		16918	2122	RFC 2122
ventrilo	ventrilo	Provisional		12502
ves	ves	Provisional		10176
videotex	videotex	Historical		2406	2122	draft-mavrakis-videotex-url-spec-01; RFC 2122; RFC 3986
view-source	view-source	Provisional		8506
vnc	Remote Framebuffer Protocol	Permanent		11537	7869	RFC 7869
vscode	vscode	Provisional		7812
vscode-insiders	vscode-insiders	Provisional		3255
vsls	vsls	Provisional		9816
w3	w3 (see [reviewer notes])	Provisional		11799
wais	Wide Area Information Servers	Historical		8454	4156	RFC 4156
wasm	wasm	Provisional		15741
wasm-js	wasm-js	Provisional		14709
wcr	wcr	Provisional		11892
web+ap	web+ap	Provisional		17361
web+interaction	web+interaction	Provisional		1024
web3	web3	Provisional		4559
webcal	webcal	Provisional		4183
wifi	wifi	Provisional		14867
wpid	wpid	Historical		1658
ws	WebSocket connections	Permanent	[RFC 8307]	11962	6455	RFC 6455
wss	Encrypted WebSocket connections	Permanent	[RFC 8307]	3119	6455	RFC 6455
wtai	wtai	Provisional		9910
wyciwyg	wyciwyg	Provisional		15641
xcompute	xcompute	Provisional		13785
xcon	xcon	Permanent		10467	6501	RFC 6501
xcon-userid	xcon-userid	Permanent		9520	6501	RFC 6501
xfire	xfire	Provisional		15306
xftp	xftp	Provisional		4315
xmlrpc.beep	xmlrpc.beep	Permanent		3005	3529	RFC 3529
xmlrpc.beeps	xmlrpc.beeps	Permanent		15805	3529	RFC 3529
xmpp	Extensible Messaging and Presence Protocol	Permanent		15358	5122	RFC 5122
xrcp	xrcp	Provisional		4747
xri	xri	Provisional		11255
xudanu	xudanu	Provisional		1041
ymsgr	ymsgr	Provisional		3837
z39.50	Z39.50 information access	Historical		1319	1738	RFC 1738; RFC 2056
z39.50r	Z39.50 Retrieval	Permanent		8159	2056	RFC 2056
z39.50s	Z39.50 Session	Permanent		6380	2056	RFC 2056
ztdnaid	ztdnaid	Provisional		1008