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

WYNNEWOOD prefixes in area code 405

NANPA records 3 assigned NXX blocks to rate center WYNNEWOOD in area code 405, 0.4% of the 783 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 UNITED STATES CELLULAR - OK (1), ONVOY, LLC - OK (1), SOUTHWESTERN BELL (1). 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 572 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 405
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
405-251 UNITED STATES CELLULAR - OK – yes yes
405-335 Onvoy ONVOY, LLC - OK – yes yes
405-665 AT&T SOUTHWESTERN BELL – 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
UNITED STATES CELLULAR - OK – 1 33.3%
ONVOY, LLC - OK Onvoy 1 33.3%
SOUTHWESTERN BELL AT&T 1 33.3%

Frequently asked

Which prefixes belong to WYNNEWOOD in area code 405?

3 blocks: 251, 335, 665. The table above gives the holder of each.

Which carriers have numbers in WYNNEWOOD?

UNITED STATES CELLULAR - OK (1 block), ONVOY, LLC - OK (1 block), SOUTHWESTERN BELL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WYNNEWOOD 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 405

All 783 prefixes in 405