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

TOPPENISH prefixes in area code 509

NANPA records 4 assigned NXX blocks to rate center TOPPENISH in area code 509, 0.5% 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. 2 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA (2), UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA (2). The earliest assignment on record here is 2019-05-06 and the most recent 2019-05-06. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.5% of 509
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
509-314 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
509-829 Lumen UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA – yes yes
509-864 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 2019-05-06 yes yes
509-865 Lumen UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA – no 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA Verizon 2 50%
UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA Lumen 2 50%

Frequently asked

Which prefixes belong to TOPPENISH in area code 509?

4 blocks: 314, 829, 864, 865. The table above gives the holder of each.

Which carriers have numbers in TOPPENISH?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA (2 blocks), UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - WA (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is TOPPENISH 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