---
title: "Area code 248: Michigan, United States"
url: "https://lookvalid.com/area-code/248.md"
canonical_url: "https://lookvalid.com/area-code/248"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 248 serves Michigan, United States. Number formats, numbering rules, a live phone validator and the other codes in Michigan."
---

# Area code 248: Michigan, United States

Area code 248 serves Michigan, United States. Number formats, numbering rules, a live phone validator and the other codes in Michigan.

NANPA lists 784 central office codes (prefixes) in use in area code 248, held by 28 holders across 21 rate centers.
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.
The FCC unwanted-call data has 3,706 complaints on file for 2,574 numbers in 248, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- 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

| 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% |

## Carriers

| 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.

## History

- 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.

## Nearest area codes

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).

## ZIP codes

47 ZIP codes fall in places that have a rate center in this area code. The places with the most are Farmington, MI (6 ZIP codes), Southfield, MI (6 ZIP codes) and Troy, MI (6 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

3,706 complaints for 2,574 numbers. Numbers whose latest complaint falls in each year:

- 2023: 101
- 2024: 94
- 2025: 92

## Questions

### 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.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).