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

DEWEY prefixes in area code 918

NANPA records 4 assigned NXX blocks to rate center DEWEY in area code 918, 0.5% of the 782 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. 4 holders hold those blocks, the largest being SOUTHWESTERN BELL (1), RINGER MOBILE, INC. (1), T-MOBILE USA, INC. (1). The earliest assignment on record here is 2002-04-26 and the most recent 2024-10-30. 4 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 539 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 918
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
918-534 AT&T SOUTHWESTERN BELL – yes yes
918-620 RINGER MOBILE, INC. 2024-10-30 yes yes
918-860 T-Mobile T-MOBILE USA, INC. 2002-04-26 yes yes
918-972 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2016-07-19 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
SOUTHWESTERN BELL AT&T 1 25%
RINGER MOBILE, INC. – 1 25%
T-MOBILE USA, INC. T-Mobile 1 25%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 25%

Frequently asked

Which prefixes belong to DEWEY in area code 918?

4 blocks: 534, 620, 860, 972. The table above gives the holder of each.

Which carriers have numbers in DEWEY?

SOUTHWESTERN BELL (1 block), RINGER MOBILE, INC. (1 block), T-MOBILE USA, INC. (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is DEWEY 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 918

All 782 prefixes in 918