T-Mobile USA, Inc. is the legal name of T-Mobile's mobile network in the US.
T-Mobile USA, Inc. is the company behind T-Mobile's mobile phone service. NANPA also lists T-Mobile prefixes under the names of companies T-Mobile took over, such as Omnipoint, Aerial Communications, Powertel, VoiceStream and SunCom, and each of those names has its own page here. NANPA, which runs the North American numbering plan, lists T-Mobile as the holder of 7,037 prefixes in 28 states and territories, 3.5% of the 198,436 prefixes it has assigned.
- Name in NANPA's file
- T-MOBILE USA, INC.
- What it is
- Mobile network
- Prefixes held
- 7,037 of 198,436 (3.5%)
- States and territories
- 28 of 56, most in California, Illinois and Texas
- Area codes
- 157
- Pooled prefixes
- 92%, 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 T-Mobile 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.
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A lookup shows T-Mobile when the number is on T-Mobile's mobile network.
Carrier records use a company's legal or historic name, so a lookup can show T-Mobile USA, Inc. while the person's bill says T-Mobile.
Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a T-Mobile prefix can show another company if it was ported.
T-Mobile holds the most prefixes in California: 2,079 of its 7,037.
- California2,079
- Illinois921
- Texas820
- Washington414
- Ohio379
- Arizona322
- Colorado291
- Oklahoma206
Plus 1,605 prefixes in 20 more states and territories.
T-Mobile holds prefixes in 157 area codes, and these are its largest.
Of the prefixes NANPA dates, T-Mobile received the most in 2001: 472.
NANPA's file gives an assignment date for 4,518 of T-Mobile's 7,037 prefixes, all from 2001 on. The rest have no date in the file.
T-Mobile holds 120 prefixes in area code 213, downtown Los Angeles.
- 213-210
- 213-245
- 213-255
- 213-258
- 213-265
- 213-268
- 213-272
- 213-274
- 213-301
- 213-313
- 213-326
- 213-331
- 213-343
- 213-344
- 213-354
- 213-357
- 213-372
- 213-376
- 213-397
- 213-398
- 213-414
- 213-420
- 213-421
- 213-431
- 213-459
- 213-462
- 213-464
- 213-466
- 213-468
- 213-469
- 213-475
- 213-476
- 213-492
- 213-497
- 213-498
- 213-526
- 213-539
- 213-548
- 213-551
- 213-554
- 213-556
- 213-558
- 213-564
- 213-569
- 213-571
- 213-573
- 213-574
- 213-583
- 213-585
- 213-597
- 213-619
- 213-642
- 213-643
- 213-645
- 213-646
- 213-648
- 213-649
- 213-653
- 213-661
- 213-665
- 213-675
- 213-676
- 213-682
- 213-691
- 213-697
- 213-721
- 213-728
- 213-729
- 213-734
- 213-756
- 213-759
- 213-773
- 213-781
- 213-783
- 213-791
- 213-794
- 213-795
- 213-796
- 213-801
- 213-803
- 213-804
- 213-809
- 213-812
- 213-815
- 213-820
- 213-822
- 213-824
- 213-827
- 213-828
- 213-829
- 213-834
- 213-843
- 213-845
- 213-846
- 213-848
- 213-849
- 213-851
- 213-852
- 213-853
- 213-854
- 213-857
- 213-859
- 213-862
- 213-865
- 213-869
- 213-871
- 213-875
- 213-879
- 213-881
- 213-882
- 213-902
- 213-905
- 213-921
- 213-930
- 213-931
- 213-934
- 213-945
- 213-951
- 213-956
- 213-982
A call from a T-Mobile number is not spam just because of the carrier.
Numbers on mobile networks like this one belong to millions of ordinary people and businesses, so the carrier name says nothing about who is calling.
Caller ID can also be faked, so judge the call by what the caller asks for, never by the carrier name.
Check the full number with our free spam phone checker before you call back.
You can read about 5 more carrier names here.
These are the questions people ask about T-Mobile.
What is T-Mobile USA, Inc.?
T-Mobile USA, Inc. is the company behind T-Mobile's mobile phone service. NANPA also lists T-Mobile prefixes under the names of companies T-Mobile took over, such as Omnipoint, Aerial Communications, Powertel, VoiceStream and SunCom, and each of those names has its own page here.
Why does a phone lookup say T-Mobile?
A lookup shows T-Mobile when the number is on T-Mobile's mobile network. Carrier records use a company's legal or historic name, so a lookup can show T-Mobile USA, Inc. while the person's bill says T-Mobile. Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a T-Mobile prefix can show another company if it was ported.
Is a call from a T-Mobile number spam?
Numbers on mobile networks like this one belong to millions of ordinary people and businesses, so the carrier name says nothing about who is calling. Caller ID can also be faked, so judge the call by what the caller asks for, never by the carrier name. Check the full number with our free spam phone checker before you call back.
How many phone prefixes does T-Mobile hold?
NANPA lists T-Mobile as the holder of 7,037 prefixes, 3.5% of all assigned US prefixes. A prefix is the three digits after the area code and covers up to 10,000 numbers. 92% of these are pooled, so blocks of 1,000 numbers inside them can belong to other carriers.
Which states have the most T-Mobile prefixes?
California (2,079), Illinois (921) and Texas (820) have the most, out of 28 states and territories.
Can I find out who owns a T-Mobile number?
T-Mobile 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.