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

VALLEYPARK prefixes in area code 636

NANPA records 14 assigned NXX blocks to rate center VALLEYPARK in area code 636, 3.2% 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. 5 holders hold those blocks, the largest being SOUTHWESTERN BELL (7), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO (3), ONVOY, LLC - MO (2). The earliest assignment on record here is 2001-07-05 and the most recent 2001-07-05. 10 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

14 assigned blocks – 3.2% of 636
5 holders of record
10 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
636-225 AT&T SOUTHWESTERN BELL – no yes
636-226 AT&T SOUTHWESTERN BELL – yes yes
636-412 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO – no yes
636-431 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO – yes yes
636-435 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO – yes yes
636-444 Onvoy ONVOY, LLC - MO – yes yes
636-517 AT&T SOUTHWESTERN BELL 2001-07-05 yes yes
636-529 AT&T SOUTHWESTERN BELL – yes yes
636-556 Onvoy ONVOY, LLC - MO – yes yes
636-689 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO – yes yes
636-825 AT&T SOUTHWESTERN BELL – yes yes
636-827 AT&T SOUTHWESTERN BELL – no yes
636-861 AT&T SOUTHWESTERN BELL – no yes
636-923 Windstream PAETEC ITEL, LLC – 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 7 50%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO Verizon 3 21.4%
ONVOY, LLC - MO Onvoy 2 14.3%
TELEPORT COMMUNICATIONS AMERICA, LLC - MO AT&T 1 7.1%
PAETEC ITEL, LLC Windstream 1 7.1%

Frequently asked

Which prefixes belong to VALLEYPARK in area code 636?

14 blocks: 225, 226, 412, 431, 435, 444, 517, 529, 556, 689, 825, 827 and 2 more, all listed in the table above.

Which carriers have numbers in VALLEYPARK?

SOUTHWESTERN BELL (7 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO (3 blocks), ONVOY, LLC - MO (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - MO (1 block), PAETEC ITEL, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is VALLEYPARK 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