572
Area code
OK
United States geographic area code, in service since 2021-05-24. Part of the 405/572 overlay complex — ten-digit dialing required.
Statusin service
Introduced2021-05-24
JurisdictionOK, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 16.4% of assignable prefixes assigned
As of 09/17/2026
0%130 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 2021-03-26, most recent 2026-05-21.
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 | ONVOY, LLC - OK | 20 | 15.4% |
| 02 | UNITED STATES CELLULAR - OK | 19 | 14.6% |
| 03 | FRACTEL, LLC | 15 | 11.5% |
| 04 | TON80 COMMUNICATIONS, LLC | 9 | 6.9% |
| 05 | MULTIPLE OCN LISTING | 9 | 6.9% |
| 06 | T-MOBILE USA, INC. | 8 | 6.2% |
| 07 | NEW CINGULAR WIRELESS PCS, LLC - IL | 7 | 5.4% |
| 08 | COMMIO, LLC | 5 | 3.8% |
| 09 | BANDWIDTH.COM CLEC, LLC - OK | 5 | 3.8% |
| 10 | 5 | 3.8% |
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- 2020-03-04 NPA 572 to Overlay NPA 405 (Oklahoma)
- 2021-05-24Area code 572 entered service (created from 405).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2020-03-04 | PL-535 ↗ | NPA 572 to Overlay NPA 405 (Oklahoma) |