Area code 600 is a telephone area code in the

North American Numbering Plan The North American Numbering Plan (NANP) is a 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 and has the international calling ...

for non-geographic use in

Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...

of specialized

telecommunication Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...

services such as

telex The telex network is a station-to-station switched network of teleprinters similar to a telephone network, using telegraph-grade connecting circuits for two-way text-based messages. Telex was a major method of sending written messages electroni ...

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. Work ...

, 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 __NOTOC__ Year 610 ( DCX) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar, the 610th year of the Common Era (CE) and ''Anno Domini'' (AD) designations, the 610th year of the 1st millennium, th ...

in the Teletypewriter Exchange Service (''TWX'') in 1962. The services were reassigned to area code 600 in 1992, 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

911 911 or 9/11 may refer to: Dates * AD 911 * 911 BC * September 11 ** 9/11, the September 11 attacks of 2001 ** 11 de Septiembre, Chilean coup d'état in 1973 that outed the democratically elected Salvador Allende * November 9 Numbers * 91 ...

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

666 666 may refer to: * 666 (number) * 666 BC, a year * AD 666, a year * The number of the beast, a reference in the Book of Revelation in the New Testament Places * 666 Desdemona, a minor planet in the asteroid belt * U.S. Route 666, an America ...

is not assigned. Each block of 10,000 numbers is assigned to one carrier only; number portability or

number pooling Number pooling is a method of reallocating telephony numbering space in the North American Numbering Plan, primarily in growth areas in the United States. Instead of allocating blocks of ten thousand numbers to each carrier in each community, a bl ...

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 __NOTOC__ 600 ( DC) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 600 for this year has been used since the early medieval period, when the Anno Domini calendar era became the ...

See also

References

External links