Michigan Bell is AT&T's local phone company in Michigan.
Michigan Bell was the Bell phone company for most of Michigan and part of the Ameritech group. SBC bought Ameritech in 1999 and took the AT&T name in 2005, so Michigan Bell is AT&T's local phone company there today. NANPA, which runs the North American numbering plan, lists Michigan Bell as the holder of 1,410 prefixes, all in Michigan.
- Name in NANPA's file
- MICHIGAN BELL TEL CO
- What it is
- AT&T's landline company
- Prefixes held
- 1,410 of 198,436 (less than 1%)
- States and territories
- Michigan
- Area codes
- 11
- Pooled prefixes
- 42%, 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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Enter the full number to see its carrier now, which may not be Michigan Bell 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.
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A lookup shows Michigan Bell when the number is a line on AT&T's local phone network.
These are landlines and business lines that AT&T runs under the Michigan Bell name in that area, which is why the lookup does not just say AT&T.
Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a Michigan Bell prefix can show another company if it was ported.
All 1,410 prefixes Michigan Bell holds are in Michigan.
- Michigan1,410
Michigan Bell holds prefixes in 11 area codes, and these are its largest.
A call from a Michigan Bell number is not spam just because of the carrier.
Michigan Bell 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.
You can read about 5 more carrier names here.
These are the questions people ask about Michigan Bell.
What is Michigan Bell?
Michigan Bell was the Bell phone company for most of Michigan and part of the Ameritech group. SBC bought Ameritech in 1999 and took the AT&T name in 2005, so Michigan Bell is AT&T's local phone company there today.
Why does a phone lookup say Michigan Bell?
A lookup shows Michigan Bell when the number is a line on AT&T's local phone network. These are landlines and business lines that AT&T runs under the Michigan Bell name in that area, which is why the lookup does not just say AT&T. Numbers can also move between carriers, so a lookup reads the number's carrier today, and a number with a Michigan Bell prefix can show another company if it was ported.
Is a call from a Michigan Bell number spam?
Michigan Bell 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 Michigan Bell hold?
NANPA lists Michigan Bell as the holder of 1,410 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. 42% of these are pooled, so blocks of 1,000 numbers inside them can belong to other carriers.
Which states have the most Michigan Bell prefixes?
All 1,410 prefixes Michigan Bell holds in NANPA's file are in Michigan.
Can I find out who owns a Michigan Bell number?
Michigan Bell 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.