Numbering Resources

International Numbering Resources

INR Database

INR Database (Restricted Access)

ITU-T E.164 Country Codes &
ITU-T E.118 Issuer Identifier Number (IIN)
ITU-T E.212 (MCC & MNC)
ITU-T E.218 (TMCC)
ITU-T Q.708 (ISPC & SANC)

Access to this database is restricted to ITU Member States and ITU-T Sector Members only.
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OPERATIONAL BULLETIN

The ITU Operational Bulletin is a fortnightly publication containing administrative and operational information exchanged between administrations and recognized operating agencies (ROAs) and other service providers, entities and organizations, in respect to international telecommunication services.

ENUM Delegations

ENUM defines a method for entering Recommendation E.164 country codes into the Internet Domain Name System.

The Object Identifier (OID)

An object identifier (OID) is an identification mechanism defined in the Recommendations ITU-T X.660 | ISO/IEC 9834 series for naming any type of object, concept or "thing" with a globally unambiguous name which requires a persistent name (long life-time). The ITU-T Study Group 17 OID Project assists users of OIDs within and outside of ITU-T.

Misuse OF E.164 Numbering Resources

Member States and Sector Members are kindly asked to notify the TSB of situations that they are aware of that indicate potential misuse of numbering resources.
The reports and replies available on this website may be accessed by ITU TIES users only.

Bureaufax Table

The Bureaufax Table, published in collaboration with the Universal Postal Union (UPU) in pursuance of the provisions of ITU-T Recommendation F.170 (03/98), is now published in electronic version only.

Recognized Operating Agencies (ROA)

The status of Recognized Operating Agency (ROA) is used within certain ITU-T Recommendations, e.g. E.118, E.164.1, E.169.1, E.169.2, E.212, Q.708, X.121 as a criterion regarding assignment of international numbering resources. Such a list would assist in the administration of international numbering resources and would facilitate the exchange of information between ROAs, for example, on numbering changes.

Lists of Codes and Numbers

National Numbering Plans
Administrations are requested to notify ITU about their national numbering plan changes, or to give an explanation of their web page on national numbering plan as well as their contact points, so that the information, which will be available freely to all Administrations/ROAs and service providers, can be posted on ITU-T website.
National-only numbers linked with emergency services and other services of social value
ITU Carrier Codes
A centralized List of ITU Carrier Codes (ICCs) has been created with the ITU/TSB as the repository. All domestic and international carriers are expected to register with ITU/TSB for a carrier code.
International Country Codes
International country codes lists published as Annexes to the ITU Operational Bulletin (OB).
List of Codes and Numbers
Lists of Codes and Numbers published by TSB or BR as Annexes to the ITU Operational Bulletin (OB).
Universal Numbers
UIFN, UIPRN, UISCN, ITU IND AESA

Misc. Numbering Topics

Notification Forms
ITU-D Documents and Reports on Numbering
Information maintained by ITU-D on the topic of numbering.
Numbering Survey
Reserved and assigned E.164 Network Codes
List of global services and network codes assigned under E.164 codes 881 and 882, in accordance with ITU-T Recommendation E.164.1.
Reserved and assigned E.212 shared MCC and associated MNC
Guidance for E.164 and E212 applicants
Templates for applications for shared network codes
Model for applications for shared network codes in accordance with Section 8 of ITU-T Recommendation E.164.1.

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