937
Area code
OH
United States geographic area code, in service since 1996-09-28. Part of the 326/937 overlay complex — ten-digit dialing required.
Statusin service
Introduced1996-09-28
JurisdictionOH, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 100.6% of assignable prefixes assigned
As of 09/17/2026
0%797 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 2001-01-24, most recent 2024-04-04.
Area codes serve rate-center geographies, not municipal boundaries. “OH” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | OHIO BELL TEL CO | 159 | 19.9% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC - IL | 73 | 9.2% |
| 03 | T-MOBILE USA, INC. | 64 | 8% |
| 04 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 61 | 7.7% |
| 05 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 55 | 6.9% |
| 06 | LEVEL 3 COMMUNICATIONS, LLC - OH | 53 | 6.6% |
| 07 | FRONTIER NORTH, INC. - OH | 53 | 6.6% |
| 08 | TWC IP ENABLED SERVICES, LLC | 32 | 4% |
| 09 | PAETEC ITEL, LLC | 25 | 3.1% |
| 10 | ONVOY, LLC - OH | 19 | 2.4% |
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- 2018-07-03 NPA 326 to Overlay NPA 937 (Ohio)
- 1996-09-28Area code 937 entered service (created from 513).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2018-07-03 | PL-517 ↗ | NPA 326 to Overlay NPA 937 (Ohio) |
| 2001-04-24 | PL-272 ↗ | NPA 513 Boundary Realignment Franklin Rate Center (Ohio) |
| 1996-06-28 | IL-96-06-011 ↗ | NANP-Split of 513 (Ohio) Numbering Plan Area (NPA) |