North American Numbers Source-cited · ownership disclosed
Area code
810
In service
United States · since 1993

Flint / The Thumb

East-central Michigan around Flint, Lapeer and Port Huron; the first code to split from 313 (1993) and itself the parent of the 248 and 586 splits.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Flint / The Thumb
Type
geographic
Status
in service
In service since
1993
Projected exhaust
2056 Q2

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 810 is

All of Genesee and Lapeer counties; parts of St. Clair, Sanilac, Oakland, Macomb and Livingston counties (southern Thumb)..

Communities served wholly or partly by 810:

FlintPort HuronLapeerFentonBurtonGrand BlancDavisonMarysville

Territory shrank substantially after 248 (1997) and 586 (2001) carved off Oakland and Macomb counties.

B · Relationships

How it relates to other codes

The codes 810 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 1993 313 Detroit Split from 313.
Spawned · 1997 248 Oakland County Oakland County split off from 810.
Spawned · 2001 586 Macomb County Macomb County split off from 810.
What's changing. No overlay; single code, 10-digit dialing since 2021.
C · History

How 810 got here

1993-12-01
Split from 313 — Michigan's first new area code since 1961.
Source: Wikipedia
1997-05-10
Area code 248 (Oakland County) split off from 810.
Source: Wikipedia
2001-09-22
Area code 586 (Macomb County) split off from 810.
Source: Wikipedia
2021-10-24
Transitioned to 10-digit dialing (988 lifeline rollout).
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
524
Prefixes available
276
Thousands-blocks assigned
2,502

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 810 with another code →
Sources
Wikipedia ↗
Area code 810
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.