Teleport Communications America is part of AT&T's business phone network.
Teleport Communications Group was one of the first companies to compete with the local Bell phone companies, selling phone lines to businesses in big cities. AT&T bought it in 1998, and Teleport Communications America is still the name on many AT&T business numbers. NANPA, which runs the North American numbering plan, lists Teleport as the holder of 4,083 prefixes in 49 states and territories, 2.1% of the 198,436 prefixes it has assigned.
- Name in NANPA's file
- TELEPORT COMMUNICATIONS AMERICA, LLC - CA, and 46 other listings
- What it is
- AT&T's business phone network
- Prefixes held
- 4,083 of 198,436 (2.1%)
- States and territories
- 49 of 56, most in California, Texas and Illinois
- Area codes
- 310
- Pooled prefixes
- 96%, shared in blocks of 1,000 numbers
From NANPA's central office code file of October 1, 2026. A prefix is the three digits after the area code.
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A lookup shows Teleport when the number is a business line on its network.
Teleport sells phone lines to companies, so many of its numbers are office lines, call centers and other business phone systems.
Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a Teleport prefix can show another company if it was ported.
Teleport holds the most prefixes in California: 525 of its 4,083.
- California525
- Texas320
- Illinois306
- Florida283
- Pennsylvania214
- Michigan188
- New Jersey186
- Georgia180
Plus 1,881 prefixes in 41 more states and territories.
Teleport holds prefixes in 310 area codes, and these are its largest.
Of the prefixes NANPA dates, Teleport received the most in 2023: 198.
NANPA's file gives an assignment date for 1,816 of Teleport's 4,083 prefixes, all from 2001 on. The rest have no date in the file.
A call from a Teleport number is not spam just because of the carrier.
Teleport sells phone lines to businesses, so a call from one of its numbers often comes from a company's office or call center.
Whether that call is one you want is a separate question, and caller ID can be faked, so judge it by what the caller asks for.
Check the full number with our free spam phone checker before you call back.
You can read about 5 more carrier names here.
- Level 3 Communications, LLCLumen's business and wholesale network, 10,346 prefixes
- PAETEC iTel, LLCWindstream's business phone network, 5,552 prefixes
- TPx CommunicationsBusiness phone and internet company, 807 prefixes
- AllstreamBusiness phone and internet company, 450 prefixes
- LightpathBusiness fiber and phone network, 269 prefixes
These are the questions people ask about Teleport.
What is Teleport Communications America, LLC?
Teleport Communications Group was one of the first companies to compete with the local Bell phone companies, selling phone lines to businesses in big cities. AT&T bought it in 1998, and Teleport Communications America is still the name on many AT&T business numbers.
Why does a phone lookup say Teleport?
A lookup shows Teleport when the number is a business line on its network. Teleport sells phone lines to companies, so many of its numbers are office lines, call centers and other business phone systems. Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a Teleport prefix can show another company if it was ported.
Is a call from a Teleport number spam?
Teleport sells phone lines to businesses, so a call from one of its numbers often comes from a company's office or call center. Whether that call is one you want is a separate question, and caller ID can be faked, so judge it by what the caller asks for. Check the full number with our free spam phone checker before you call back.
How many phone prefixes does Teleport hold?
NANPA lists Teleport as the holder of 4,083 prefixes, 2.1% of all assigned US prefixes. A prefix is the three digits after the area code and covers up to 10,000 numbers. 96% of these are pooled, so blocks of 1,000 numbers inside them can belong to other carriers.
Which states have the most Teleport prefixes?
California (525), Texas (320) and Illinois (306) have the most, out of 49 states and territories.
Can I find out who owns a Teleport number?
Teleport does not publish who uses its numbers. Our free who called me lookup shows who a US number is listed to and the city and state on the listing, when the number has a listing.
Source: NANPA, the North American Numbering Plan Administrator: its central office code assignments, as of October 1, 2026. Company histories are from public records and each company's own descriptions.