810
Area code
MI
United States geographic area code, in service since 1993-12-01.
Statusin service
Introduced1993-12-01
JurisdictionMI, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 66.2% of assignable prefixes assigned
As of 09/17/2026
0%524 of ~792 assignable NXX values (200–999 excl. N11)100%
Prefix-level assignment does not equal number-level exhaustion; thousands-block pooling extends capacity. First assignment on record 2001-01-15, most recent 2026-09-09.
Area codes serve rate-center geographies, not municipal boundaries. “MI” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | MICHIGAN BELL TEL CO | 89 | 17% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC - IL | 63 | 12% |
| 03 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 51 | 9.7% |
| 04 | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 50 | 9.5% |
| 05 | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 36 | 6.9% |
| 06 | FRONTIER NORTH, INC. - MI | 27 | 5.2% |
| 07 | LEVEL 3 COMMUNICATIONS, LLC - MI | 25 | 4.8% |
| 08 | ONVOY, LLCV - MI | 23 | 4.4% |
| 09 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 20 | 3.8% |
| 10 | PAETEC ITEL, LLC | 19 | 3.6% |
Important: these are initial assignees from NANPA CO-code records — the carrier a prefix was originally assigned to. Because of number portability, the current serving carrier of any individual number may differ.
Change history
Recorded events for this NPA- 1993-12-01Area code 810 entered service (created from 313).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2021-01-08 | PL-556 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Lifeline) – supersedes PL-544 |
| 2020-08-17 | PL-544 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline |
| 2001-06-05 | PL-282 ↗ | 810 / 586 NPA Split (Michigan) - Wireless NXX Grandfathering |
| 2000-03-10 | PL-221 ↗ | Suspension of Code Assignments in the 586 NPA Michigan |
| 1999-09-02 | PL-192 ↗ | NANP - Overlay of 810 Numbering Plan Area (NPA) with 586 NPA - Michigan |
| 1999-06-01 | PL-178 ↗ | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 810 NPA (Michigan) |
| 1992-11-23 | IL-92-11-022 ↗ | NANP-SPLIT OF 313 (MICHIGAN) NUMBERING PLAN AREA (NPA) |