VoiceStream Wireless is the mobile network that became T-Mobile USA in 2002.
VoiceStream Wireless was a US mobile network that Deutsche Telekom bought in 2001 and renamed T-Mobile USA in 2002. NANPA still lists some T-Mobile prefixes under VoiceStream names, such as VoiceStream GSM I. NANPA, which runs the North American numbering plan, lists VoiceStream as the holder of 155 prefixes, all in Louisiana.
- Name in NANPA's file
- VOICESTREAM GSM I, LLC
- What it is
- Mobile network
- Prefixes held
- 155 of 198,436 (less than 1%)
- States and territories
- Louisiana
- Area codes
- 4
- 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.
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A lookup shows VoiceStream 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 VoiceStream 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 VoiceStream prefix can show another company if it was ported.
All 155 prefixes VoiceStream holds are in Louisiana.
- Louisiana155
VoiceStream holds prefixes in 4 area codes, and these are its largest.
Of the prefixes NANPA dates, VoiceStream received the most in 2001: 25.
NANPA's file gives an assignment date for 99 of VoiceStream's 155 prefixes, all from 2001 on. The rest have no date in the file.
A call from a VoiceStream 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 VoiceStream.
What is VoiceStream?
VoiceStream Wireless was a US mobile network that Deutsche Telekom bought in 2001 and renamed T-Mobile USA in 2002. NANPA still lists some T-Mobile prefixes under VoiceStream names, such as VoiceStream GSM I.
Why does a phone lookup say VoiceStream?
A lookup shows VoiceStream 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 VoiceStream 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 VoiceStream prefix can show another company if it was ported.
Is a call from a VoiceStream 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 VoiceStream hold?
NANPA lists VoiceStream as the holder of 155 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 VoiceStream prefixes?
All 155 prefixes VoiceStream holds in NANPA's file are in Louisiana.
Can I find out who owns a VoiceStream number?
VoiceStream 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.