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

KEYSER prefixes in area code 681

NANPA records 3 assigned NXX blocks to rate center KEYSER in area code 681, 0.6% of the 499 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. 3 holders hold those blocks, the largest being OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (1), METROPCS, INC. (1), UNITED STATES CELLULAR - WV (1). The earliest assignment on record here is 2014-03-05 and the most recent 2021-05-12. 3 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 code 304 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.6% of 681
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
681-266 T-Mobile OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 2019-03-06 yes yes
681-379 T-Mobile METROPCS, INC. 2021-05-12 yes yes
681-620 UNITED STATES CELLULAR - WV 2014-03-05 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
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC T-Mobile 1 33.3%
METROPCS, INC. T-Mobile 1 33.3%
UNITED STATES CELLULAR - WV – 1 33.3%

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 KEYSER in area code 681?

3 blocks: 266, 379, 620. The table above gives the holder of each.

Which carriers have numbers in KEYSER?

OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (1 block), METROPCS, INC. (1 block), UNITED STATES CELLULAR - WV (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is KEYSER 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 681

All 499 prefixes in 681