580
Area code
OK
United States geographic area code, in service since 1997-11-01. NANPA has flagged this area code for relief planning.
Split from 405.
Statusin service
Introduced1997-11-01
JurisdictionOK, US
Local dialing7D
Time zoneCentral
ReliefPlanning
Last verified2026-09-17
Utilization 96.2% of assignable prefixes assigned
As of 09/17/2026
0%762 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 2001-01-21, most recent 2026-08-24.
Relief planning is under way for area code 580.
No planning letter has been issued yet for this cycle — this page will be updated the day one is published. Subscribe to the change-event feed to be notified.
Area codes serve rate-center geographies, not municipal boundaries. “OK” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | SOUTHWESTERN BELL | 157 | 20.6% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC - IL | 78 | 10.2% |
| 03 | PIONEER TEL. COOP., INC. | 64 | 8.4% |
| 04 | T-MOBILE USA, INC. | 45 | 5.9% |
| 05 | ONVOY, LLC - OK | 43 | 5.6% |
| 06 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 40 | 5.2% |
| 07 | UNITED STATES CELLULAR - OK | 38 | 5% |
| 08 | WINDSTREAM OKLAHOMA, INC. | 37 | 4.9% |
| 09 | LEVEL 3 COMMUNICATIONS, LLC - OK | 28 | 3.7% |
| 10 | PANHANDLE TELEPHONE COOPERATIVE, INC. | 24 | 3.1% |
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- 1997-11-01Area code 580 entered service (created from 405).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 1997-09-11 | PL-085 ↗ | NANP-Split of 405 (Oklahoma) Numbering Plan Area (NPA) |