Lesson plan
Area code 600
Area code 600 is a telephone area code in the North American Numbering Plan for non-geographic use in Canada of specialized telecommunication services such as telex applications, caller-pays cellular, ISDN, and mobile satellite communication services. One of the area code's most common uses is the provision of satellite phone service in remote areas of Northern Canada where conventional telecommunications infrastructure is not available. Central office prefixes for area code 600 are assigned according to a special set of guidelines issued by the Canadian Radio-television and Telecommunications Commission. The guidelines do not define the services that qualify for the non-geographic numbers, but specify that: The teletypewriter services provided with the area code were previously provisioned with area code 610 in the Teletypewriter Exchange Service (TWX) in 1962. The services were reassigned to area code 600 in 1993, returning 610 to the pool of unassigned area codes for general purposes. It was reassigned in 1994 to Pennsylvania. Area code 600 has a capacity of 798 central office prefixes (200 to 999, with 555 and 911 not issued). Six relief area codes (622, 633, 644, 655, 677 and 688) are reserved by NANPA as subject to assignment in Canada for expansion of non-geographic services but have never been used. Area code 666 is not assigned.…
Article summary
Area code 600 is a telephone area code in the North American Numbering Plan for non-geographic use in Canada of specialized telecommunication services such as telex applications, caller-pays cellular, ISDN, and mobile satellite communication services. One of the area code's most common uses is the provision of satellite phone service in remote areas of Northern Canada where conventional telecommunications infrastructure is not available. Central office prefixes for area code 600 are assigned according to a special set of guidelines issued by the Canadian Radio-television and Telecommunications Commission. The guidelines do not define the services that qualify for the non-geographic numbers, but specify that: The teletypewriter services provided with the area code were previously provisioned with area code 610 in the Teletypewriter Exchange Service (TWX) in 1962. The services were reassigned to area code 600 in 1993, returning 610 to the pool of unassigned area codes for general purposes. It was reassigned in 1994 to Pennsylvania. Area code 600 has a capacity of 798 central office prefixes (200 to 999, with 555 and 911 not issued). Six relief area codes (622, 633, 644, 655, 677 and 688) are reserved by NANPA as subject to assignment in Canada for expansion of non-geographic services but have never been used. Area code 666 is not assigned.…
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.