616
Area code
Statusin service
Introduced1947-01-01
JurisdictionMI, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 70.7% of assignable prefixes assigned
As of 09/17/2026
0%560 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 2001-01-10, most recent 2026-07-24.
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 | 143 | 25.5% |
| 02 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 61 | 10.9% |
| 03 | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 52 | 9.3% |
| 04 | ONVOY, LLCV - MI | 41 | 7.3% |
| 05 | NEW CINGULAR WIRELESS PCS, LLC - IL | 37 | 6.6% |
| 06 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 27 | 4.8% |
| 07 | PAETEC ITEL, LLC | 17 | 3% |
| 08 | BANDWIDTH.COM CLEC, LLC - MI | 17 | 3% |
| 09 | TELNET WORLDWIDE, INC. | 16 | 2.9% |
| 10 | SPOK, INC. | 15 | 2.7% |
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- 1947-01-01Area code 616 entered service.
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 |
| 2002-04-30 | PL-324 ↗ | Revised Dialing Plan for the 616 and 269 NPAs (Michigan) |
| 2001-08-07 | PL-294 ↗ | 616 NPA Split; Creating 269 NPA (Michigan) |