Qwest Corporation is the local phone company Lumen runs in much of the western US.
Qwest Corporation is the old Bell phone company for 14 western and midwestern states, which was called US West until Qwest bought it in 2000. CenturyLink bought Qwest in 2011 and renamed itself Lumen Technologies in 2020, so Qwest numbers are Lumen's today. NANPA, which runs the North American numbering plan, lists Qwest as the holder of 5,604 prefixes in 15 states and territories, 2.8% of the 198,436 prefixes it has assigned.
- Name in NANPA's file
- QWEST CORPORATION
- What it is
- Lumen's landline company
- Prefixes held
- 5,604 of 198,436 (2.8%)
- States and territories
- 15 of 56, most in Colorado, Arizona and Minnesota
- Area codes
- 45
- Pooled prefixes
- 33%, 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 Qwest 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 Qwest when the number is a line on Lumen's local phone network.
These are landlines and business lines that Lumen runs under the Qwest name in that area, which is why the lookup does not just say Lumen.
Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a Qwest prefix can show another company if it was ported.
Qwest holds the most prefixes in Colorado: 905 of its 5,604.
- Colorado905
- Arizona891
- Minnesota812
- Washington754
- Oregon415
- Iowa393
- Utah393
- New Mexico261
Plus 780 prefixes in 7 more states and territories.
Qwest holds prefixes in 45 area codes, and these are its largest.
- Area code 303448 prefixes
- Area code 801326 prefixes
- Area code 602265 prefixes
- Area code 206243 prefixes
- Area code 480234 prefixes
- Area code 503222 prefixes
- Area code 520200 prefixes
- Area code 970189 prefixes
- Area code 208186 prefixes
- Area code 651185 prefixes
- Area code 505184 prefixes
- Area code 541184 prefixes
A call from a Qwest number is not spam just because of the carrier.
Qwest lines belong to homes, offices and public services, 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.
These are the questions people ask about Qwest.
What is Qwest Corporation?
Qwest Corporation is the old Bell phone company for 14 western and midwestern states, which was called US West until Qwest bought it in 2000. CenturyLink bought Qwest in 2011 and renamed itself Lumen Technologies in 2020, so Qwest numbers are Lumen's today.
Why does a phone lookup say Qwest?
A lookup shows Qwest when the number is a line on Lumen's local phone network. These are landlines and business lines that Lumen runs under the Qwest name in that area, which is why the lookup does not just say Lumen. Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a Qwest prefix can show another company if it was ported.
Is a call from a Qwest number spam?
Qwest lines belong to homes, offices and public services, 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 Qwest hold?
NANPA lists Qwest as the holder of 5,604 prefixes, 2.8% of all assigned US prefixes. A prefix is the three digits after the area code and covers up to 10,000 numbers. 33% of these are pooled, so blocks of 1,000 numbers inside them can belong to other carriers.
Which states have the most Qwest prefixes?
Colorado (905), Arizona (891) and Minnesota (812) have the most, out of 15 states and territories.
Can I find out who owns a Qwest number?
Qwest 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.