564
Area code
WA
United States geographic area code, in service since 2017-08-28. Part of the 206/564, 360/564 overlay complex — ten-digit dialing required.
Split from 360.
Statusin service
Introduced2017-08-28
JurisdictionWA, US
Local dialing10D
Time zonePacific
Last verified2026-09-17
Utilization 13.9% of assignable prefixes assigned
As of 09/17/2026
0%110 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 2017-06-30, most recent 2026-09-08.
Area codes serve rate-center geographies, not municipal boundaries. “WA” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | T-MOBILE USA, INC. | 22 | 20% |
| 02 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 13 | 11.8% |
| 03 | ONVOY, LLC - WA | 12 | 10.9% |
| 04 | MULTIPLE OCN LISTING | 9 | 8.2% |
| 05 | TELEPORT COMMUNICATIONS AMERICA, LLC - WA | 8 | 7.3% |
| 06 | FRACTEL, LLC | 7 | 6.4% |
| 07 | TON80 COMMUNICATIONS, LLC | 6 | 5.5% |
| 08 | 6 | 5.5% | |
| 09 | LEVEL 3 COMMUNICATIONS, LLC - WA | 4 | 3.6% |
| 10 | TERRA NOVA TELECOM INC. | 3 | 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- 2023-08-03 NPA 564 to Overlay NPA 206 (Washington)
- 2016-06-28 NPA 564 to Overlay NPA 360 (Washington)
- 2017-08-28Area code 564 entered service (created from 360).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2023-08-03 | PL-620 ↗ | NPA 564 to Overlay NPA 206 (Washington) |
| 2016-06-28 | PL-492 ↗ | NPA 564 to Overlay NPA 360 (Washington) |
| 2001-08-29 | PL-298 ↗ | Suspension of 564 Overlay (Washington) |
| 2000-07-27 | PL-239 ↗ | NPA 564 to Overlay NPAs 206, 253, 360, and 425 (Washington) |
| 1999-10-29 | PL-196 ↗ | NANP- Overlay of 360 Numbering Plan Area (NPA) with 564 NPA (Washington) |