283
Area code
OH
United States geographic area code, in service since 2023-04-28. Part of the 283/513 overlay complex — ten-digit dialing required.
Statusin service
Introduced2023-04-28
JurisdictionOH, US
Local dialing10D
Time zoneEastern
Last verified2026-09-17
Utilization 7.8% of assignable prefixes assigned
As of 09/17/2026
0%62 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 2023-06-09, most recent 2026-08-26.
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 | ONVOY, LLC - OH | 19 | 30.6% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC - IL | 9 | 14.5% |
| 03 | MULTIPLE OCN LISTING | 9 | 14.5% |
| 04 | WIDE VOICE, LLC - OH | 5 | 8.1% |
| 05 | 5 | 8.1% | |
| 06 | T-MOBILE USA, INC. | 4 | 6.5% |
| 07 | FIVE9, INC. | 2 | 3.2% |
| 08 | WAVENATION, LLC | 1 | 1.6% |
| 09 | WADDELL SOLUTIONS GROUP LLC | 1 | 1.6% |
| 10 | ONVOY SPECTRUM, LLC | 1 | 1.6% |
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- 2022-02-11 NPA 283 to Overlay NPA 513 (Ohio)
- 2001-06-29 Mandatory Dialing Date Established for NPA 283 (Ohio) other
- 2023-04-28Area code 283 entered service (created from 513).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2022-02-11 | PL-579 ↗ | NPA 283 to Overlay NPA 513 (Ohio) |
| 2002-03-25 | PL-316 ↗ | Suspension of 513/283 NPA Overlay (Ohio) |
| 2001-06-29 | PL-286 ↗ | Mandatory Dialing Date Established for NPA 283 (Ohio) |
| 2001-02-27 | PL-264 ↗ | New NPA 283 to Overlay NPA 513 (Ohio) |