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

RITZVILLE prefixes in area code 509

NANPA records 6 assigned NXX blocks to rate center RITZVILLE in area code 509, 0.8% 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. 4 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC (2), CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK (2), T-MOBILE USA, INC. (1). The earliest assignment on record here is 2002-09-24 and the most recent 2002-09-24. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

6 assigned blocks – 0.8% of 509
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
509-347 AT&T NEW CINGULAR WIRELESS PCS, LLC 2002-09-24 yes yes
509-428 T-Mobile T-MOBILE USA, INC. – yes yes
509-650 INLAND CELLULAR LLC – yes yes
509-659 Lumen CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK – yes yes
509-660 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
509-887 Lumen CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK – 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
NEW CINGULAR WIRELESS PCS, LLC AT&T 2 33.3%
CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK Lumen 2 33.3%
T-MOBILE USA, INC. T-Mobile 1 16.7%
INLAND CELLULAR LLC – 1 16.7%

Frequently asked

Which prefixes belong to RITZVILLE in area code 509?

6 blocks: 347, 428, 650, 659, 660, 887. The table above gives the holder of each.

Which carriers have numbers in RITZVILLE?

NEW CINGULAR WIRELESS PCS, LLC (2 blocks), CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK (2 blocks), T-MOBILE USA, INC. (1 block), INLAND CELLULAR LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is RITZVILLE 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