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

MT VERNON prefixes in area code 360

NANPA records 47 assigned NXX blocks to rate center MT VERNON in area code 360, 6.0% of the 786 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. 9 holders hold those blocks, the largest being ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER (24), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA (8), T-MOBILE USA, INC. (5). The earliest assignment on record here is 2001-04-16 and the most recent 2001-04-16. 35 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 207, 251, 319, 417 – overlay codes cover the same geography, so a rate center is served by all of them.

47 assigned blocks – 6% of 360
9 holders of record
35 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
360-202 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
360-230 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – yes yes
360-293 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
360-299 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-333 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
360-336 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
360-391 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
360-395 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – yes yes
360-399 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
360-404 Onvoy ONVOY, LLC - WA – yes yes
360-416 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
360-419 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-420 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
360-421 T-Mobile T-MOBILE USA, INC. 2001-04-16 no yes
360-422 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-424 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
360-428 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-429 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-445 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-466 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-488 Lumen LEVEL 3 COMMUNICATIONS, LLC - WA – yes yes
360-503 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
360-540 T-Mobile T-MOBILE USA, INC. – no yes
360-542 SKYE TELECOM LLC DBA SKYETEL – yes yes
360-588 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-610 T-Mobile T-MOBILE USA, INC. – yes yes
360-630 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
360-661 T-Mobile METROPCS, INC. – yes yes
360-707 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-708 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – no yes
360-724 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-755 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-757 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
360-766 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-770 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – no yes
360-814 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - WA – yes yes
360-826 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-840 T-Mobile T-MOBILE USA, INC. – yes yes
360-848 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
360-853 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-854 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-855 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-856 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – no yes
360-873 Ziply Fiber ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER – yes yes
360-899 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA – yes yes
360-941 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
360-982 T-Mobile T-MOBILE USA, INC. – 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 24 51.1%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA Verizon 8 17%
T-MOBILE USA, INC. T-Mobile 5 10.6%
NEW CINGULAR WIRELESS PCS, LLC AT&T 3 6.4%
TELEPORT COMMUNICATIONS AMERICA, LLC - WA AT&T 3 6.4%
ONVOY, LLC - WA Onvoy 1 2.1%
LEVEL 3 COMMUNICATIONS, LLC - WA Lumen 1 2.1%
SKYE TELECOM LLC DBA SKYETEL – 1 2.1%
METROPCS, INC. T-Mobile 1 2.1%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to MT VERNON in area code 360?

47 blocks: 202, 230, 293, 299, 333, 336, 391, 395, 399, 404, 416, 419 and 35 more, all listed in the table above.

Which carriers have numbers in MT VERNON?

ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER (24 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA (8 blocks), T-MOBILE USA, INC. (5 blocks), NEW CINGULAR WIRELESS PCS, LLC (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - WA (3 blocks), ONVOY, LLC - WA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MT VERNON 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 360

All 786 prefixes in 360