NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

ELLENSBURG prefixes in area code 509

NANPA records 21 assigned NXX blocks to rate center ELLENSBURG in area code 509, 2.8% of the 763 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 7 holders hold those blocks, the largest being CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY (8), T-MOBILE USA, INC. (6), NEW CINGULAR WIRELESS PCS, LLC (2). The earliest assignment on record here is 2001-07-11 and the most recent 2026-01-08. 17 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

21 assigned blocks – 2.8% of 509
7 holders of record
17 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
509-201 Charter CHARTER IP ENABLED SERVICES, LLC – yes yes
509-273 T-Mobile T-MOBILE USA, INC. 2022-10-19 yes yes
509-306 T-Mobile METROPCS, INC. – yes yes
509-312 T-Mobile T-MOBILE USA, INC. 2001-07-11 yes yes
509-607 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
509-617 T-Mobile T-MOBILE USA, INC. 2024-06-08 yes yes
509-705 AT&T NEW CINGULAR WIRELESS PCS, LLC 2024-12-23 yes yes
509-708 T-Mobile T-MOBILE USA, INC. 2025-08-19 yes yes
509-718 T-Mobile T-MOBILE USA, INC. 2026-01-08 yes yes
509-856 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – yes yes
509-857 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – yes yes
509-859 UNITED STATES CELLULAR - WA – yes yes
509-899 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
509-925 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – no yes
509-929 UNITED STATES CELLULAR - WA – yes yes
509-933 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – no yes
509-962 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – no yes
509-963 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – no yes
509-964 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – yes yes
509-968 Consolidated CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY – yes yes
509-986 T-Mobile T-MOBILE USA, INC. 2021-11-17 yes yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY Consolidated 8 38.1%
T-MOBILE USA, INC. T-Mobile 6 28.6%
NEW CINGULAR WIRELESS PCS, LLC AT&T 2 9.5%
UNITED STATES CELLULAR - WA – 2 9.5%
CHARTER IP ENABLED SERVICES, LLC Charter 1 4.8%
METROPCS, INC. T-Mobile 1 4.8%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA Verizon 1 4.8%

Frequently asked

Which prefixes belong to ELLENSBURG in area code 509?

21 blocks: 201, 273, 306, 312, 607, 617, 705, 708, 718, 856, 857, 859 and 9 more, all listed in the table above.

Which carriers have numbers in ELLENSBURG?

CONSOLIDATED COMMUNICATIONS OF WASHINGTON COMPANY (8 blocks), T-MOBILE USA, INC. (6 blocks), NEW CINGULAR WIRELESS PCS, LLC (2 blocks), UNITED STATES CELLULAR - WA (2 blocks), CHARTER IP ENABLED SERVICES, LLC (1 block), METROPCS, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ELLENSBURG a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 509

All 763 prefixes in 509