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E.164 is an international standard (ITU-T Recommendation), titled The international public telecommunication numbering plan, that defines a numbering plan for the worldwide public switched telephone network (PSTN) and some other data networks. E.164 defines a general format for international telephone numbers.
Telephone number mapping is a system of unifying the international telephone number system of the public switched telephone network with the Internet addressing and identification name spaces. Internationally, telephone numbers are systematically organized by the E.164 standard, while the Internet uses the Domain Name System (DNS) for linking ...
Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct dialing (IDD). Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's.
Instead of E.164/2002, another more ambitious numbering plan was proposed. In this plan the prefix 0 was discarded, and the area codes were defined differently, with 20 to 49 for geographic areas, 50 to 59 reserved, 60-69 for nationwide numbering, 70-79 for mobile services, 80-89 for shared-cost and toll-free numbers, and 90 for premium-rate ...
A broad division is commonly recognized between closed and open numbering plans. A closed numbering plan, as found in North America, features fixed-length area codes and local numbers, while an open numbering plan has a variance in the length of the area code, local number, or both of a telephone number assigned to a subscriber line. The latter ...
Numbers beginning with 014 are predominantly used for satellite services. Parts of the 014 prefix had previously been used as a 9 digit, AMPS mobile phone access code. The 01471 prefix is the ten-digit replacement for the previous, nine-digit ITERRA satellite phone code 0071 (followed by 5 numbers). Prior to its use for ITERRA (and other ...
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They are composed of a combination of an area code and a local line or subscriber telephone number. Area codes consist of one digit (Lagos, Ibadan and Abuja) or two digits. Local telephone numbers contain from five to seven digits, and may vary within the area code. Mobile phone numbers start with 070, 080 or 081, 090 or 091 and are followed by ...