TPx Communications, formerly U.S. TelePacific, sells phone and internet service to businesses.
TPx Communications, which used to be called U.S. TelePacific, sells phone, internet and managed network services to businesses. It is based in Los Angeles, and NANPA lists its prefixes as U.S. TelePacific Corp., doing business as TPx Communications. NANPA, which runs the North American numbering plan, lists TPx as the holder of 807 prefixes in 34 states and territories, less than 1% of the 198,436 prefixes it has assigned.
- Name in NANPA's file
- U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
- What it is
- Business phone and internet company
- Prefixes held
- 807 of 198,436 (less than 1%)
- States and territories
- 34 of 56, most in California, Texas and Nevada
- Area codes
- 136
- Pooled prefixes
- 95%, 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.
You can check which carrier a number is on today, for free.
Enter the full number to see its carrier now, which may not be TPx if the number was ported. It is the same free check as our carrier lookup. To see whether it is a mobile, landline or VoIP line, use the line type lookup, and to see who it is listed to, the who called me lookup.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
A lookup shows TPx when the number is a business line on its network.
TPx 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 TPx prefix can show another company if it was ported.
TPx holds the most prefixes in California: 613 of its 807.
- California613
- Texas65
- Nevada38
- Massachusetts13
- Florida7
- New York7
- Ohio7
- Pennsylvania6
Plus 51 prefixes in 26 more states and territories.
TPx holds prefixes in 136 area codes, and these are its largest.
Of the prefixes NANPA dates, TPx received the most in 2026: 74.
NANPA's file gives an assignment date for 275 of TPx's 807 prefixes, all from 2001 on. The rest have no date in the file.
A call from a TPx number is not spam just because of the carrier.
TPx 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
- Teleport Communications America, LLCAT&T's business phone network, 4,083 prefixes
- PAETEC iTel, LLCWindstream's business phone network, 5,552 prefixes
- AllstreamBusiness phone and internet company, 450 prefixes
- LightpathBusiness fiber and phone network, 269 prefixes
These are the questions people ask about TPx.
What is TPx Communications?
TPx Communications, which used to be called U.S. TelePacific, sells phone, internet and managed network services to businesses. It is based in Los Angeles, and NANPA lists its prefixes as U.S. TelePacific Corp., doing business as TPx Communications.
Why does a phone lookup say TPx?
A lookup shows TPx when the number is a business line on its network. TPx 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 TPx prefix can show another company if it was ported.
Is a call from a TPx number spam?
TPx 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 TPx hold?
NANPA lists TPx as the holder of 807 prefixes, less than 1% of all assigned US prefixes. A prefix is the three digits after the area code and covers up to 10,000 numbers. 95% of these are pooled, so blocks of 1,000 numbers inside them can belong to other carriers.
Which states have the most TPx prefixes?
California (613), Texas (65) and Nevada (38) have the most, out of 34 states and territories.
Can I find out who owns a TPx number?
TPx 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.