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

COKEVILLE prefixes in area code 307

NANPA records 4 assigned NXX blocks to rate center COKEVILLE in area code 307, 0.8% 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 UNION TELEPHONE COMPANY (2), NEW CINGULAR WIRELESS PCS, LLC (1), ALL WEST COMMUNICATIONS - WY (1). The earliest assignment on record here is 2015-02-17 and the most recent 2015-02-17. 1 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.8% of 307
3 holders of record
1 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
307-229 AT&T NEW CINGULAR WIRELESS PCS, LLC 2015-02-17 yes yes
307-270 UNION TELEPHONE COMPANY – no yes
307-279 ALL WEST COMMUNICATIONS - WY – no yes
307-600 UNION TELEPHONE COMPANY – 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
UNION TELEPHONE COMPANY – 2 50%
NEW CINGULAR WIRELESS PCS, LLC AT&T 1 25%
ALL WEST COMMUNICATIONS - WY – 1 25%

Frequently asked

Which prefixes belong to COKEVILLE in area code 307?

4 blocks: 229, 270, 279, 600. The table above gives the holder of each.

Which carriers have numbers in COKEVILLE?

UNION TELEPHONE COMPANY (2 blocks), NEW CINGULAR WIRELESS PCS, LLC (1 block), ALL WEST COMMUNICATIONS - WY (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is COKEVILLE 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 307

All 499 prefixes in 307