234
Area code
OH
United States geographic area code, in service since 2000-10-30. Part of the 234/330 overlay complex — ten-digit dialing required.
Statusin service
Introduced2000-10-30
JurisdictionOH, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 52% of assignable prefixes assigned
As of 09/17/2026
0%412 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 2001-06-06, most recent 2026-09-16.
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 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 48 | 11.7% |
| 02 | ONVOY, LLC - OH | 47 | 11.4% |
| 03 | FRACTEL, LLC | 33 | 8% |
| 04 | NEW CINGULAR WIRELESS PCS, LLC - IL | 32 | 7.8% |
| 05 | T-MOBILE USA, INC. | 27 | 6.6% |
| 06 | TWC IP ENABLED SERVICES, LLC | 24 | 5.8% |
| 07 | BANDWIDTH.COM CLEC, LLC - OH | 21 | 5.1% |
| 08 | TON80 COMMUNICATIONS, LLC | 14 | 3.4% |
| 09 | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 12 | 2.9% |
| 10 | ONVOY SPECTRUM, LLC | 11 | 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- 2000-02-21 NPA 234 to Overlay NPA 330 (Ohio)
- 2000-10-30Area code 234 entered service (created from 330).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2000-02-21 | PL-213 ↗ | NPA 234 to Overlay NPA 330 (Ohio) |