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Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
Map of Oklahoma with area code boundaries. The state of Oklahoma is served by the following area codes: 405/572: Central Oklahoma including Oklahoma City (original area code created in 1947; 572 added as overlay on April 24, 2021 [1] [2] [3] 580: Western and southern Oklahoma (split from 405 in 1997)
Users can switch carriers while keeping number and prefix (so prefixes are not tightly coupled to a specific carrier). 7 Claro 8: Instituto Costarricense de Electricidad (Kölbi) Croatia +385: 91: 9: A1 Hrvatska: Due to Mobile number portability the prefix of an existing number does not determine the carrier. Any new number will follow the ...
Former Rural Com; national coverage based on iPCS technology and Wi-Nodes [64] 302: 780: SaskTel: SaskTel Mobility: Operational: UMTS 850 / UMTS 1900 / LTE 600 / LTE 700 / LTE 850 / LTE 1900 / LTE 1700 / LTE 2600 / 5G 1700 / 5G 3500: Saskatchewan [2] [65] [66] 302: 781: SaskTel: SaskTel Mobility: Not operational: Unknown [60] MNC withdrawn [39 ...
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A telephone prefix is the first set of digits after the country, and area codes of a telephone number. In the North American Numbering Plan countries (country code 1), it is the first three digits of a seven-digit local phone number, the second three digits of the 3-3-4 scheme. In other countries, both the prefix and the number may have ...
E.164 permits a maximum length of 15 digits for the complete international phone number consisting of the country code, the national routing code (area code), and the subscriber number. E.164 does not define regional numbering plans, however, it does provide recommendations for new implementations and uniform representation of all telephone ...
The entire 506-752 prefix is assigned to Aliant Telecom (NB) and serves Campobello Island, New Brunswick. [2] Campobello is a border community [3] and is a local call to Lubec, Maine, [4] in area code 207. The 207-733 prefix serves Lubec, split between FairPoint Communications and a pair of competitors using number pooling. [5]