Area code 600 is a telephone

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

in the

North American Numbering Plan The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1, World Numbering Zone ...

for non-geographic use in

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

of specialized

telecommunication Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of ...

services such as

telex Telex is a telecommunication Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communica ...

applications, caller-pays cellular,

ISDN Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the digitalised circuits of the public switched telephone network. ...

, and mobile satellite communication services. One of the area code's most common uses is the provision of

satellite phone A satellite telephone, satellite phone or satphone is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting the Earth instead of terrestrial cell sites, as cellphones do. Therefo ...

service in remote areas of

Northern Canada Northern Canada (), colloquially the North or the Territories, is the vast northernmost region of Canada, variously defined by geography and politics. Politically, the term refers to the three Provinces_and_territories_of_Canada#Territories, terr ...

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 Canadian Radio-television and Telecommunications Commission (CRTC; ) is a public organization in Canada tasked with the mandate as a regulatory agency tribunal for various electronic communications, covering broadcasting and telecommunic ...

. 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 servicesCanadian Numbering Plan and Dialling Plan
Version 5.0, The Canadian Steering Committee on Numbering (CSCN), October 26, 2011, page 13 but have never been used. Area code 666 is not assigned. Each block of 10,000 numbers is assigned to one carrier only; number portability or

number pooling Telephone number pooling, thousands-block number pooling, or just number pooling, is a method of allocating telephony numbering space of the North American Numbering Plan in the United States. The method allocates telephone numbers in blocks of 1,0 ...

is not practiced. A carrier offering multiple, different non-geographic services may request separate prefixes for each.

References

{{reflist

External links

Non-geographic Telephone Codes for North America

CSCN Assignment Guidelines: Service Area Code (SAC) 600 NXX Code Assignment (April 13, 1994)
Archived fro
original
on August 28, 2006 via Wayback Machine. Retrieved September 7, 2019. 600 Telecommunications-related introductions in 1993

See also

References

External links