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Exchanges may service on mobile devices; local numbers are portable between wired and wireless carriers. While area code 600 has been established as a non-geographic code that can be used by mobile phones, the only significant mobile usage has been for satellite phone service in remote regions.
The following information applied to residential local telephone service in the Detroit, Michigan area during the 1970s and 1980s. Much about this subject has changed dramatically since that time, and continues to do so. A local exchange carrier is a carrier of telephone calls and other communication services carried by telephone lines.
However, the New York Public Service Commission authorized the nation's first CLEC when it required New York Telephone (the ILEC) to allow Teleport Communications Group's switches in New York City to connect as peers. [3] Other states followed New York's lead so that by the mid-1990s most of the large states had authorized local exchange ...
The two-letter country codes were used by the US government for geographical data processing in many publications, such as the CIA World Factbook. The standard is also known as DAFIF 0413 ed 7 Amdt. No. 3 (Nov 2003) and as DIA 65-18 ( Defense Intelligence Agency , 1994, "Geopolitical Data Elements and Related Features").
A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. [1] Telephone numbers are the addresses of participants in a telephone network, reachable by a system of destination code routing.
411 — local telephone directory service; some telephone companies provide national directory assistance. 511 — traffic, road, and tourist information; 611 — telephone line repair service (formerly 4104), wireless operator customer service (formerly 811) 711 — relay service for customers with hearing or speech disabilities
on the date of enactment of the Telecommunications Act of 1996, provided telephone exchange service on the date of enactment, was deemed to be a member of the National Exchange Carrier Association pursuant to the Code of Federal Regulations (C.F.R) Title 47 , section 69.601(b).
A country or region with an autonomous telephone administration must apply for membership in the International Telecommunication Union (ITU) to participate in the international public switched telephone network (PSTN). Country codes are defined by the ITU-T section of the ITU in standards E.123 and E.164.