Updated 29 February 2008	By Country Code	By Country Name	Other WTNG pages	Acknowledgements
			Main Page Help Calendar Glossary History Regional Services Special Services
Links and Other Resources

The following are various links and sources of information on telephone numbering and related matters. Please note that these links are not part of WTNG, but are the responsibility of their respective authors.

The International Dialing Resource Center has general information on international dialing.

The World Wide Phone Guide features telephone standards throughout the world, intended for travelling modem users.

The International Telecommunications Union (ITU) is the global organisation responsible for telecommunications standards, including the assignment of telephone country codes. Their Operational Bulletin lists changes to national telephone numbering formats in the "Telephone Service" chapter. However, current editions of the Bulletin are only available on the paying service, and not available for general web access. There may be other generally accessible ITU information (press releases, E.164 country code lists, etc.).

ITU also has a series of International Country Codes lists.

Also see ITU's page of International Numbering Resources which is collecting numbering plan details for some nations.

An ITU Newsletter (1996 #7) features an interview with telephone numbering experts Fred Gaechter and Sverre Isaksen.

An article, Numbering: Sine Qua Non of Telecommunications describes a workshop on telephone numbering in the Czech Republic.

A list of country codes with time zones is available from Construction Site.

This site from Spain contains selected international codes.

Of course, when calling around the world, knowledge of the time zone of the called party can be helpful. Check the US Navy World Time Zones list.

The European Radiocommunications Office maintains a list of links of regulators.

ITU maintains a directory of national telecom regulators.

International numbering information is also available from numberplan.org and Telecom Paper Numberplan Service.

For online telephone directories from various nations, check Yahoo! Reference or Teldir. For mobile numbering information, check GSM mobile phone number ranges (from GSM World) or BTCS IDD International Notifications

IETF operates a Telephone Number Mapping (enum) working group, dealing with means of connecting the Internet with conventional telephone numbers. There is an associated mailing list.

There is also an International Numbering Plans site (link courtesy Richard de Koning).

Some numbering news is also available through the AT&T International Dialing Updates page.

Regulatel is an association of Latin American regulators.

Finally, for those with a particular interest in telecom numbering topics, the TELNUM-L discussion mailing list is available. For more information, see http://telnum.wtng.info/.

Return to Top