Area code
248
248 is a United States area code. Under the North American Numbering Plan it belongs to Michigan, which has 13 area codes in total.
Validate a number in 248
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 248 at a glance
NANPA lists 784 central office codes (prefixes) in use in area code 248, held by 28 holders across 21 rate centers.
| Fact | Value |
|---|---|
| In service since | 1997-05-10 |
| Time zone | Eastern (E) |
| Assigned overlays | 947 (2002-09-07) |
| Prefixes in use | 784 |
| Pooled prefixes | 473 (60%) |
| Rate centers | 21 |
| Companies holding prefixes | 28 |
| Assignment dates on file | 2001-01-25 to 2025-12-16 (162 prefixes) |
| ZIP codes in its places | 47 |
Rate centers in area code 248
| Rate center | Prefixes | Share |
|---|---|---|
| PONTIAC | 150 | 19% |
| SOUTHFIELD | 104 | 13% |
| ROYAL OAK | 84 | 11% |
| BIRMINGHAM | 61 | 8% |
| TROY | 61 | 8% |
| NORTHVILLE | 54 | 7% |
| FARMINGTON | 47 | 6% |
| W BLOOMFLD | 37 | 5% |
| 13 other rate centers | 186 | 24% |
Who holds the prefixes in 248
Michigan Bell Tel holds the most prefixes, 250 (32%). 60% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Michigan Bell Tel | 250 | 32% |
| Verizon Wireless | 72 | 9% |
| New Cingular Wireless PCS | 66 | 8% |
| Mcimetro Access Transmission Services | 62 | 8% |
| Level 3 Communications | 58 | 7% |
| Metropcs | 49 | 6% |
| 22 other carriers | 227 | 29% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 248
- 1993-12-01 Area code 810, named as the parent of 248 in the NANPA report, was in service.
- 1997-05-10 Area code 248 went into service.
- 2002-09-07 Area code 947 went into service as an overlay in the same area as 248.
Area codes nearest to 248
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
ZIP codes in area code 248
47 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Farmington, MI | 6 |
| Southfield, MI | 6 |
| Troy, MI | 6 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 248 numbers
3,706 FCC complaints are on file for 2,574 numbers in 248, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 101 |
| 2024 | 94 |
| 2025 | 92 |
Other area codes in Michigan
Michigan is one state with 13 area codes in the NANPA table. 248 is one of them.
Next to 248 in the numbering table
These are the codes just before and after 248 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 248 was first assigned in Michigan. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Michigan next to a 248 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 248
Where is area code 248?
NANPA assigns area code 248 to Michigan, United States.
In which state does area code 248 sit?
Michigan. 248 is one of 13 area codes the NANPA table assigns to the state.
Which places does area code 248 cover?
The places with the most ZIP codes among the rate centers in 248 are Farmington, MI, Southfield, MI and Troy, MI. The rate center list on this page shows all of them.
Who owns area code 248?
NANPA assigns area codes. Within 248, Michigan Bell Tel holds the most prefixes, 250 prefixes or 32%.
Which time zone does 248 use?
The NANPA NPA report lists the time zone for 248 as Eastern (E).
What year did 248 enter service?
The NANPA NPA report gives an in-service date of 1997-05-10, so 248 has been in use since 1997.
Does area code 248 have an overlay?
Yes. 947 (in service 2002-09-07) shares the same area with 248, so numbers from all of them are local to each other.
Which area codes are nearest to 248?
The area codes closest to 248, measured between the centers of the ZIP code places they serve, are 586 (about 16 miles), 810 (about 23 miles), 734 (about 32 miles), 517 (about 64 miles) and 989 (about 92 miles).
How many prefixes does area code 248 have?
NANPA's report dated 2026-10-17 lists 784 prefixes in service in 248, spread over 21 rate centers and 28 holders.
Are there complaints about 248 numbers?
The FCC data on file has 3,706 complaints for 2,574 numbers in 248. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.