Area Code 248
Michigan
Area code 248 serves Michigan, primarily Livonia, in the Eastern Time (ET) time zone. It has served the region since 10-May-1997.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 947 (Livonia).
In service since: 10-May-1997
Demographics & Economics
- Total Population
- 1,634,744
- Population Density
- 1,003 people/sq miabove U.S. average (U.S.: 93 people/sq mi)
- Median Household Income
- $95,296above U.S. median (U.S.: $75,144)
- Poverty Rate
- 8.8%below U.S. average (U.S.: 11.5%)
- Unemployment Rate
- 5.0%above U.S. average (U.S.: 3.6%)
- Education Attainment
- Bachelor's Degree+47.3%above U.S. average (U.S.: 33.7%)High School or Lower21.4%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the income ranking and density ranking.
Time Zone
- Eastern Time (ET)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
MI
Major Cities
- Livonia
- Troy
- Farmington Hills
- Rochester Hills
- Southfield
- Novi
- Pontiac
- Royal Oak
- Oak Park
- Madison Heights
- Auburn Hills
- Birmingham
- Ferndale
- Wixom
- Berkley
- Hazel Park
- Rochester
- South Lyon
- Farmington
- Clawson
- Beverly Hills
- Walled Lake
- Milford
- Huntington Woods
and 19 more cities
Historical Timeline of Area Code 248
Area code 248 was created on May 10, 1997, in a split from area code 810, serving Oakland County and portions of Wayne County in southeastern Michigan. It was overlaid by area code 947 on June 8, 2002, after number exhaustion was projected for June 2002. The code traces back to the original 1947 assignment of area code 313, which covered southeastern Michigan. Source: Wikipedia
Key milestones:
- 1997: Area code 248 created (May 10, 1997) in a split from area code 810, serving Oakland County and portions of Wayne County including Livonia and Northville.
- 1999: Jeopardy declared for 248 NPA (May 17, 1999) due to projected NXX code exhaustion, with only 83 available CO codes remaining and a rationing rate of 6 CO codes per month. (MPSC Ex Parte Presentation)
- 2000: Governor Engler signed Public Act 295 of 2000 (July 17, 2000), granting the Michigan Public Service Commission authority over area code changes in the state.
- 2001: MPSC approved all-services distributed overlay for 248 NPA via Case No. U-12721 (April 17, 2001), introducing the 947 overlay NPA.
- 2002: Permissive 10-digit dialing began January 26, 2002. Mandatory 10-digit dialing commenced June 8, 2002, when the 947 overlay was fully implemented. (Wikipedia)
The 248 NPA went from creation to jeopardy in under two years, reflecting rapid growth in the Detroit metropolitan area's northern suburbs. The overlay model chosen for relief allowed existing 248 subscribers to keep their numbers while new assignments used the 947 NPA.
Regulatory History
Area code 248's regulatory history involves multiple NANPA planning letters, Michigan Public Service Commission cases, and FCC proceedings that governed the 947 overlay implementation from initial proposal through mandatory 10-digit dialing. Source: MPSC Ex Parte Presentation
| Year | Event | Docket | Regulatory Action & Impact |
|---|---|---|---|
| 2000 | Initial overlay proposal | NANPA PL-209 | Proposed 947 overlay for 248 NPA with planned introduction May 5, 2001. Later suspended by PL-227. |
| 2000 | Relief suspension | NANPA PL-227 | Suspended relief in 248, 313, and 734 NPAs due to FCC jurisdiction questions regarding NANPA authority. |
| 2001 | Overlay approval | MPSC U-12721 | Approved all-services distributed overlay for 248 NPA, introducing 947 NPA. 2001 Mich. PSC LEXIS 196. |
| 2001 | Delegated numbering authority | CC Docket 99-200 | MPSC petition confirmed 248 NPA jeopardy with 83 available CO codes, projected exhaust June 2002. (MPSC Filing) |
| 2001 | 313/734 overlay (248 excluded) | MPSC U-12880 | Approved 313/734 overlay; explicitly excluded 248 NPA from multiple-area overlay region. (MPSC Order) |
| 2001 | Overlay implementation confirmed | NANPA PL-283 | Confirmed 947 overlay implementation following MPSC approval. Permissive 10-digit dialing began January 26, 2002; mandatory June 8, 2002. |
| 2001 | Pooling rollout scheduling | CC Docket 99-200 | MPSC requested 248/947 NPAs be moved to 2nd Quarter of pooling rollout to allow relief completion before number pooling. (MPSC Filing) |
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 248).
| County | Population | Share |
|---|---|---|
| Oakland, MI | 1,300,192 | 79.5% |
| Washtenaw, MI | 85,623 | 5.2% |
| Wayne, MI | 78,714 | 4.8% |
| Livingston, MI | 67,524 | 4.1% |
| Lapeer, MI | 39,130 | 2.4% |
| Genesee, MI | 35,730 | 2.2% |
| Macomb, MI | 27,831 | 1.7% |
Area Code 248 Family Tree
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Area code 248 was originally assigned in 10-May-1997 to serve MI. Over the years, it has generated 1 descendant area code through a combination of geographic splits and overlays as demand for telephone numbers grew.
Call Context
This area code serves a major metropolitan region with high population density in MI. The primary city is Livonia.
Nearby Area Codes
Area codes geographically closest to 248.
Other Area Codes in Michigan
Area codes that also serve Michigan, linked for easy comparison.