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Telephone numbers in Canada follow the fixed-length format of the North American Numbering Plan (NANP) of a three-digit area code, a three-digit central office code (or exchange code), and a four-digit station or line code.
The northern two thirds of Alberta, including Edmonton, received area code 780, while leaving 403 to serve Calgary and southern Alberta. The projected exhaust dates for area codes 403 and 780 were March and October 2009, respectively. In 1997, two area codes, 587 and 825, were reserved by Bellcore for Alberta. [1]
Area code 780 is also the last new area code in Canada to be introduced by a split. Within a decade, area code 780 was close to exhaustion once again, along with area 403 in the south. The solution for mitigation was to implement a complex overlay for the entire province, extending over both numbering plan areas, with the new area code 587 .
Area code 403 is a telephone area code in the North American Numbering Plan (NANP) for the Canadian province of Alberta. The numbering plan area encompasses the southern third of the province, which includes the Calgary area. This numbering plan area is also served by area codes 587, 825, and 368, which form a complex overlay for all of Alberta.
Historically known for distributing yellow pages phone books across Canada, into the 21st century YPG has primarily shifted to digital marketing services, though they also operate the YellowPages.ca local business search engine and Canada411 online phone directory, [1] [2] and still print phone books on a limited basis to some customers as of 2024.
Alberta (all) April 23, 2022: overlaid on 403, 780, and 587/825; 568 reserved as a fifth area code for the region. 369: California (Vallejo, Crescent City, Eureka, Redwoods National Park, Santa Rosa, Ukiah, and most of northwestern California) February 1, 2023: overlaid on 707; 370–379: not in use; reserved in case a block of consecutive ...
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411 is a telephone number for local directory assistance in Canada and the United States. Until the early 1980s, 411 – and the related 113 number – were free to call in most jurisdictions. In the United States, the service is commonly known as "information", [ 1 ] although its official name is "directory assistance".