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

KIRKLAND prefixes in area code 425

NANPA records 80 assigned NXX blocks to rate center KIRKLAND in area code 425, 12.7% 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. 14 holders hold those blocks, the largest being ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER (38), LEVEL 3 COMMUNICATIONS, LLC - WA (11), TELEPORT COMMUNICATIONS AMERICA, LLC - WA (6). The earliest assignment on record here is 2001-03-30 and the most recent 2024-01-09. 38 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 779, 815, 940 – overlay codes cover the same geography, so a rate center is served by all of them.

80 assigned blocks – 12.7% of 425
14 holders of record
38 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
425-202 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
425-216 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA – yes yes
425-242 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA 2001-05-30 yes yes
425-250 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM – yes yes
425-284 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM – yes yes
425-285 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 2001-03-30 yes yes
425-296 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – yes yes
425-298 Windstream PAETEC ITEL, LLC 2008-08-01 yes yes
425-305 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA 2014-05-01 yes yes
425-307 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – yes yes
425-376 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-380 AT&T NEW CINGULAR WIRELESS PCS, LLC 2022-04-12 yes yes
425-403 AT&T NEW CINGULAR WIRELESS PCS, LLC 2019-06-19 yes yes
425-406 Lumen CENTURYLINK COMMUNICATIONS, LLC – yes yes
425-421 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – yes yes
425-447 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 2017-09-14 yes yes
425-448 Onvoy ONVOY, LLC - WA – yes yes
425-497 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-498 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-506 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA 2021-11-02 yes yes
425-522 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA – yes yes
425-538 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 2007-10-08 yes yes
425-544 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 2017-09-14 yes yes
425-553 Comcast COMCAST IP PHONE, LLC 2016-02-09 yes yes
425-556 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-558 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
425-560 FIVE9, INC. 2024-01-09 yes yes
425-576 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-580 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-587 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – yes yes
425-588 AT&T NEW CINGULAR WIRELESS PCS, LLC 2016-10-17 yes yes
425-602 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – yes yes
425-605 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – no yes
425-629 Lumen LEVEL 3 TELECOM OF WASHINGTON, LLC - WA – yes yes
425-636 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA – yes yes
425-650 Onvoy ONVOY, LLC - WA – no yes
425-655 AT&T NEW CINGULAR WIRELESS PCS, LLC 2018-08-10 yes yes
425-658 Onvoy ONVOY, LLC - WA – yes yes
425-702 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-703 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA 2018-12-12 no yes
425-704 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-705 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA 2018-12-13 no yes
425-706 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA 2018-12-12 no yes
425-707 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA 2018-12-12 no yes
425-708 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 2001-09-10 no yes
425-722 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA 2018-12-13 no yes
425-727 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-739 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-755 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-803 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-814 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-820 Ziply Fiber ZIPLY FIBER NORTHWEST LLC DBA ZIPLY FIBER – no yes
425-821 Ziply Fiber ZIPLY FIBER NORTHWEST LLC DBA ZIPLY FIBER – no yes
425-822 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-823 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-825 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-827 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-828 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-836 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
425-845 Onvoy ONVOY, LLC - WA 2022-12-19 yes yes
425-861 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-867 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-868 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-869 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-881 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-882 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-883 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-885 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-889 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-893 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-895 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-896 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – yes yes
425-897 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – no yes
425-898 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
425-899 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-936 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
425-947 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – yes yes
425-952 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM – yes yes
425-968 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA – yes yes
425-979 AT&T NEW CINGULAR WIRELESS PCS, LLC 2015-06-23 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
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER Ziply Fiber 38 47.5%
LEVEL 3 COMMUNICATIONS, LLC - WA Lumen 11 13.8%
TELEPORT COMMUNICATIONS AMERICA, LLC - WA AT&T 6 7.5%
NEW CINGULAR WIRELESS PCS, LLC AT&T 5 6.2%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA Verizon 4 5%
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM Allstream 4 5%
ONVOY, LLC - WA Onvoy 4 5%
ZIPLY FIBER NORTHWEST LLC DBA ZIPLY FIBER Ziply Fiber 2 2.5%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 1.2%
PAETEC ITEL, LLC Windstream 1 1.2%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 1.2%
COMCAST IP PHONE, LLC Comcast 1 1.2%
FIVE9, INC. – 1 1.2%
LEVEL 3 TELECOM OF WASHINGTON, LLC - WA Lumen 1 1.2%

Frequently asked

Which prefixes belong to KIRKLAND in area code 425?

80 blocks: 202, 216, 242, 250, 284, 285, 296, 298, 305, 307, 376, 380 and 68 more, all listed in the table above.

Which carriers have numbers in KIRKLAND?

ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER (38 blocks), LEVEL 3 COMMUNICATIONS, LLC - WA (11 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - WA (6 blocks), NEW CINGULAR WIRELESS PCS, LLC (5 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA (4 blocks), ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is KIRKLAND 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