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

WARRENTON prefixes in area code 636

NANPA records 10 assigned NXX blocks to rate center WARRENTON in area code 636, 2.3% of the 435 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. 7 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (2), ONVOY, LLC - MO (2), BRIGHTSPEED OF MISSOURI, LLC (2). The earliest assignment on record here is 2002-04-09 and the most recent 2022-11-15. 9 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 252, 503, 540, 706 – overlay codes cover the same geography, so a rate center is served by all of them.

10 assigned blocks – 2.3% of 636
7 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
636-201 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2020-08-17 yes yes
636-202 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 2018-09-18 yes yes
636-204 Onvoy ONVOY, LLC - MO 2021-06-17 yes yes
636-213 T-Mobile T-MOBILE USA, INC. 2022-01-11 yes yes
636-235 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2002-04-09 yes yes
636-297 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO – yes yes
636-359 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
636-377 Brightspeed BRIGHTSPEED OF MISSOURI, LLC 2006-10-12 yes yes
636-456 Brightspeed BRIGHTSPEED OF MISSOURI, LLC – no yes
636-589 Onvoy ONVOY, LLC - MO 2022-11-15 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 20%
ONVOY, LLC - MO Onvoy 2 20%
BRIGHTSPEED OF MISSOURI, LLC Brightspeed 2 20%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO Verizon 1 10%
T-MOBILE USA, INC. T-Mobile 1 10%
LEVEL 3 COMMUNICATIONS, LLC - MO Lumen 1 10%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO Verizon 1 10%

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 WARRENTON in area code 636?

10 blocks: 201, 202, 204, 213, 235, 297, 359, 377, 456, 589. The table above gives the holder of each.

Which carriers have numbers in WARRENTON?

NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), ONVOY, LLC - MO (2 blocks), BRIGHTSPEED OF MISSOURI, LLC (2 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO (1 block), T-MOBILE USA, INC. (1 block), LEVEL 3 COMMUNICATIONS, LLC - MO (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WARRENTON 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 636

All 435 prefixes in 636