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AT A GLANCE



IN DEPTH


Zone 1 – North American Numbering Plan Area

Areas within NANPA (North American Numbering Plan Area) are assigned Area Codes as if they were all areas within one country.
The codes below in format +1-XXX represent area code XXX within the +1 NANPA zone — not a separate country code. For example, the dialing code for Guam is +1 (the NANPA country code) followed by the area code 671 — not +671 or +1671.



Zone 2 – Mostly Africa , some Atlantic islands



Zone 3 – Europe

Originally larger countries (e.g. France) were assigned two digit codes (to compensate for their usually longer domestic numbers) and small countries (e.g. Iceland) were assigned three digit codes; however since the 1980s all new assignments have been three digit regardless of countries’ sizes.



Zone 4 – Europe



Zone 5 – Latin America and the Caribbean



Zone 6 – Southeast Asia and Oceania



Zone 7 – Russia and Kazakhstan (former Soviet Union )



Zone 8 – East Asia and Special Services



Zone 9 – West , South and Central Asia , Middle East



Zone 0 – unassigned



Locations with no country code


  • Western Sahara (Moroccan-controlled locations use 212)

  • Somaliland (A de facto independent location uses 252)

  • Antarctica --McMurdo Base, Amundsen-Scott Base, others (Dialing is dependent on parent country of each base.)

  • Pitcairn Island (no connections to local switching; only satellite phones are dialable)

  • Kerguelen Archipelago (no permanent local switches)



HISTORY

CCITT, the predecessor of the ITU Telecommunication Standardization Sector (ITU-T), developed the first formal list of telephone country codes. This list was included in the '' 1964 CCITT Blue Book'', among other international telecommunication recommendations, which would eventually become ITU-T recommendation E.164 .

An earlier system of country codes for European use was mentioned in the '' 1960 CCITT Red Book''. Some of these country codes were retained in the CCITT country code assignments and remain in effect (e.g. France +33, United Kingdom +44).

For further details on country code history and development, see ''History of Country Codes'' ( WTNG ).


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