989
Area code
Statusin service
Introduced2001-04-07
JurisdictionMI, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 93.2% of assignable prefixes assigned
As of 09/17/2026
0%738 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 2001-01-25, most recent 2026-08-28.
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 | FRONTIER NORTH, INC. - MI | 91 | 12.3% |
| 02 | MICHIGAN BELL TEL CO | 88 | 11.9% |
| 03 | NEW CINGULAR WIRELESS PCS, LLC - IL | 82 | 11.1% |
| 04 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 73 | 9.9% |
| 05 | TELNET WORLDWIDE, INC. | 63 | 8.5% |
| 06 | ONVOY, LLCV - MI | 46 | 6.2% |
| 07 | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 35 | 4.7% |
| 08 | LEVEL 3 COMMUNICATIONS, LLC - MI | 33 | 4.5% |
| 09 | AMERICAN MESSAGING SERVICES, LLC | 24 | 3.3% |
| 10 | PAETEC ITEL, LLC | 23 | 3.1% |
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- 2001-04-07Area code 989 entered service (created from 517).
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 |
| 2000-11-21 | PL-251 ↗ | Revised Permissive Dialing Period for the 517 / 989 (MI) NPA Split |
| 2000-10-26 | PL-244 ↗ | 517 NPA Split, Creating 989 NPA (Michigan) |
| 2000-04-20 | PL-226 ↗ | Suspension of Relief in the 517 NPA (Michigan) |