740
Area code
OH
United States geographic area code, in service since 1997-12-06. Part of the 220/740 overlay complex — ten-digit dialing required.
Statusin service
Introduced1997-12-06
JurisdictionOH, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 101% of assignable prefixes assigned
As of 09/17/2026
0%800 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 2001-01-05, most recent 2025-08-20.
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 | FRONTIER NORTH, INC. - OH | 123 | 15.4% |
| 02 | OHIO BELL TEL CO | 105 | 13.1% |
| 03 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 82 | 10.3% |
| 04 | AERIAL COMMUNICATIONS, INC. | 65 | 8.1% |
| 05 | LEVEL 3 COMMUNICATIONS, LLC - OH | 63 | 7.9% |
| 06 | NEW CINGULAR WIRELESS PCS, LLC - IL | 62 | 7.8% |
| 07 | ONVOY, LLC - OH | 56 | 7% |
| 08 | TWC IP ENABLED SERVICES, LLC | 31 | 3.9% |
| 09 | BRIGHTSPEED OF NORTHWEST OHIO, INC. | 31 | 3.9% |
| 10 | WINDSTREAM WESTERN RESERVE, INC. | 21 | 2.6% |
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- 2014-10-24 NPA 220 to Overlay NPA 740 (Ohio)
- 1997-12-06Area code 740 entered service (created from 614).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2014-10-24 | PL-471 ↗ | NPA 220 to Overlay NPA 740 (Ohio) |
| 2014-02-03 | PL-462 ↗ | NPA 220 to Overlay NPA 740 (Ohio) |
| 1997-11-19 | PL-101 ↗ | Revisions to the Split of 614 (Ohio) Numbering Plan Area (NPA) |