947
Area code
MI
United States geographic area code, in service since 2002-09-07. Part of the 248/947 overlay complex — ten-digit dialing required.
Statusin service
Introduced2002-09-07
JurisdictionMI, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 28.4% of assignable prefixes assigned
As of 09/17/2026
0%225 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 2005-03-04, most recent 2026-09-01.
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 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 73 | 32.4% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC - IL | 41 | 18.2% |
| 03 | ONVOY, LLCV - MI | 23 | 10.2% |
| 04 | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 14 | 6.2% |
| 05 | TON80 COMMUNICATIONS, LLC | 12 | 5.3% |
| 06 | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 11 | 4.9% |
| 07 | METROPCS, INC. | 11 | 4.9% |
| 08 | MULTIPLE OCN LISTING | 9 | 4% |
| 09 | FRACTEL, LLC | 9 | 4% |
| 10 | 5 | 2.2% |
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- 2001-06-07 New NPA 947 to Overlay NPA 248 (Michigan)
- 2002-09-07Area code 947 entered service (created from 248).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2002-03-29 | PL-320 ↗ | Mandatory Dialing Postponed - 248/947 NPA Overlay (Michigan) |
| 2001-06-07 | PL-283 ↗ | New NPA 947 to Overlay NPA 248 (Michigan) |
| 2000-04-24 | PL-227 ↗ | Suspension of Relief in the 248, 313 and 734 NPAs (Michigan) |
| 2000-02-01 | PL-209 ↗ | NPA 947 to Overlay NPA 248 / NPA 679 to Overlay NPA 313 / NPA 278 to Overlay NPA 734 (Michigan) |