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

MAPLE VLY prefixes in area code 425

NANPA records 11 assigned NXX blocks to rate center MAPLE VLY in area code 425, 1.8% of the 628 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. 6 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - WA (3), QWEST CORPORATION (3), ONVOY, LLC - WA (2). The earliest assignment on record here is 2002-02-21 and the most recent 2002-02-21. 9 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

11 assigned blocks – 1.8% of 425
6 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
425-310 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – yes yes
425-358 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA 2002-02-21 yes yes
425-413 Lumen QWEST CORPORATION – no yes
425-432 Lumen QWEST CORPORATION – no yes
425-433 Lumen QWEST CORPORATION – yes yes
425-437 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – yes yes
425-569 Lumen LEVEL 3 TELECOM OF WASHINGTON, LLC - WA – yes yes
425-578 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
425-584 Onvoy ONVOY, LLC - WA – yes yes
425-660 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – yes yes
425-906 Onvoy ONVOY, LLC - WA – 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
LEVEL 3 COMMUNICATIONS, LLC - WA Lumen 3 27.3%
QWEST CORPORATION Lumen 3 27.3%
ONVOY, LLC - WA Onvoy 2 18.2%
TELEPORT COMMUNICATIONS AMERICA, LLC - WA AT&T 1 9.1%
LEVEL 3 TELECOM OF WASHINGTON, LLC - WA Lumen 1 9.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 9.1%

Frequently asked

Which prefixes belong to MAPLE VLY in area code 425?

11 blocks: 310, 358, 413, 432, 433, 437, 569, 578, 584, 660, 906. The table above gives the holder of each.

Which carriers have numbers in MAPLE VLY?

LEVEL 3 COMMUNICATIONS, LLC - WA (3 blocks), QWEST CORPORATION (3 blocks), ONVOY, LLC - WA (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - WA (1 block), LEVEL 3 TELECOM OF WASHINGTON, LLC - WA (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES 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 MAPLE VLY 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 425

All 628 prefixes in 425