Uniform Resource Names (URN) Namespaces

Last Updated
2026-09-11
Note
This is the Official IANA Registry of URN Namespaces.
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Registries Included Below

Formal URN Namespaces

Registration Procedure(s)
Expert Review, per Section 6 of [RFC8141]. 
Fast-track procedure for standards organizations described in Section 6.3.
Expert(s)
Peter Saint-Andre (team leader), Dale Worley, Juha Hakala, Stephanie Nitsche, Lars Svensson
Reference
[RFC8141]
Available Formats

CSV
URN Namespace Template Reference
3gpp [RFC5279]
3gpp2 urn-formal/3gpp2 [RFC8464]
adid [RFC8107]
alert [RFC7462]
bbf [RFC8057]
broadband-forum-org [RFC8057]
c2pa urn-formal/c2pa [C2PA]
cablelabs [RFC6289]
ccsds [RFC7738]
cdx urn-formal/cdx [The OWASP Foundation Inc.]
cgi [RFC5138]
clei [RFC4152]
csa urn-formal/csa [Connectivity Standards Alliance]
cta urn-formal/cta [Consumer Technology Association]
ddi [RFC9517]
dev urn-formal/dev [RFC9039]
dgiwg [RFC6288]
doi urn-formal/doi [DOI Foundation]
dslforum-org [RFC8057]
dvb [RFC5328][RFC7354]
ebu [RFC5174]
eic urn-formal/eic [European Network of Transmission System Operators for Electricity (ENTSO-E)]
eidr [RFC7972]
epc [RFC5134]
epcglobal [RFC5134]
etsi urn-formal/etsi [RFC8515]
eurosystem [RFC7207]
example [RFC6963]
fdc [RFC4198]
fipa [RFC3616]
gdr urn-formal/gdr [GoDaddy Registry]
gdst urn-formal/gdst [Institute of Food Technologists]
geant [RFC4926]
globus [RFC7853]
gs1 urn-formal/gs1 [GS1 AISBL]
gsma [RFC7254]
gvat urn-formal/gvat [Bundeskanzleramt der Republik Österreich]
hbbtv [RFC7528]
ieee [RFC8069]
ietf [RFC2648]
iptc [RFC3937]
isan [RFC4246]
isbn urn-formal/isbn [International ISBN Agency]
iso [RFC5141]
isni urn-formal/isni [ISNI International Agency]
issn urn-formal/issn [ISSN International Centre]
itu urn-formal/itu [International Telecommunications Union (ITU)]
ivis [RFC4617]
knx urn-formal/knx [KNX Association cvba]
lei urn-formal/lei [Global Legal Entity Identifier Foundation (GLEIF)]
lex urn-formal/lex [RFC9676]
liberty [RFC3622]
mace [RFC3613]
mef [RFC7818]
meta urn-formal/meta [Juha_Hakala]
mpeg [RFC3614]
mrn urn-formal/mrn [International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA)]
nan urn-formal/nan [The National Archives of Finland]
nato [RFC7467]
nbn urn-formal/nbn [RFC8458]
nena [RFC6061]
newsml [RFC3085]
nfc [RFC4729]
nfi urn-formal/nfi [Neuro-Foundation]
nzl [RFC4350]
oasis [RFC3121]
ogc [RFC5165]
ogf [RFC6453]
oid [RFC3061]
oipf [RFC6893]
oma [RFC4358]
onem2m urn-formal/onem2m [oneM2M Partnership Project]
onf urn-formal/onf [Open Networking Foundation]
pin [RFC3043]
pno urn-formal/pno [PROFIBUS Nutzerorganisation e.V.]
publicid [RFC3151]
pwid urn-formal/pwid [Eld_Zierau]
reso urn-formal/reso [Real Estate Standards Organization (RESO)]
s1000d [RFC4688]
said urn-formal/said [Wenjing_Chu]
schac [RFC6338]
service [RFC5031]
smpte [RFC5119]
stalwart urn-formal/stalwart [Stalwart Labs LLC]
swift [RFC3615]
thread urn-formal/thread [Thread Group, Inc.]
trivore urn-formal/trivore [Trivore Corp.]
tva [RFC4195]
uci [RFC4179]
ucode [RFC6588][RFC Errata 3188][RFC Errata 3189]
uic urn-formal/uic [Union International de Chemin de Fer]
uuid [RFC9562]
web3d [RFC3541]
wfa urn-formal/wfa [Wi-Fi Alliance]
wmo urn-formal/wmo [World Meteorological Organization]
xmlorg [RFC3120]
xmpp [RFC4854]

Informal URN Namespaces

Registration Procedure(s)
Expert Review, per Section 6 of [RFC8141].
Expert(s)
Peter Saint-Andre (team leader), Dale Worley, Juha Hakala, Stephanie Nitsche
Reference
[RFC8141]
Available Formats

CSV
URN Namespace Template Reference
urn-1 urn-informal/urn-1 [Michael_Mealling]
urn-2 urn-informal/urn-2 [Robert_M._Akscyn]
urn-3 urn-informal/urn-3 [Andrea_Goethals]
urn-4 urn-informal/urn-4 [Kevin_P._Yancey]
urn-5 urn-informal/urn-5 [B._Fallenstein]
urn-6 urn-informal/urn-6 [Evan_Prodromou]
urn-7 [RFC6050]
urn-8 urn-informal/urn-8 [Juanma_Garcia]

Contact Information

ID Name Contact URI Last Updated
[Andrea_Goethals] Andrea Goethals mailto:nrs-ns-adm&hulmail.harvard.edu 2010-01-28
[B._Fallenstein] B. Fallenstein mailto:b.fallenstein&gmx.de 2002-08-16
[Eld_Zierau] Eld Zierau mailto:elzi&kb.dk 2022-11-18
[Evan_Prodromou] Evan Prodromou mailto:evan&wikitravel.org 2006-04-25
[Juanma_Garcia] Juanma Garcia mailto:revistaencrucijadas&gmail.com 2025-07-02
[Juha_Hakala] Juha Hakala mailto:juha.hakala&helsinki.fi 2022-11-17
[Kevin_P._Yancey] Kevin P. Yancey mailto:kpyancey&yahoo.com 2002-02-11
[Michael_Mealling] Michael Mealling mailto:michael&bailey.dscga.com 2001-02-23
[Robert_M._Akscyn] Robert M. Akscyn mailto:rma&ks.com 2001-02-23
[Wenjing_Chu] Wenjing Chu mailto:trustoverip&lfdecentralizedtrust.org 2026-03-18