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

FSSCRSTLCY prefixes in area code 636

NANPA records 16 assigned NXX blocks to rate center FSSCRSTLCY in area code 636, 3.7% 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. 10 holders hold those blocks, the largest being SOUTHWESTERN BELL (3), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (2), LEVEL 3 COMMUNICATIONS, LLC - MO (2). The earliest assignment on record here is 2002-03-13 and the most recent 2024-03-13. 15 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

16 assigned blocks – 3.7% of 636
10 holders of record
15 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
636-208 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2002-10-23 yes yes
636-209 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO – yes yes
636-232 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2002-04-09 yes yes
636-331 T-Mobile T-MOBILE USA, INC. 2017-08-09 yes yes
636-341 T-Mobile T-MOBILE USA, INC. 2021-04-28 yes yes
636-396 Onvoy ONVOY, LLC - MO 2024-03-13 yes yes
636-465 Charter CHARTER IP ENABLED SERVICES, LLC 2006-11-07 yes yes
636-524 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2002-03-13 yes yes
636-535 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 2014-11-10 yes yes
636-543 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO 2009-07-08 yes yes
636-637 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 2019-09-03 yes yes
636-638 Charter CHARTER IP ENABLED SERVICES, LLC 2012-05-22 yes yes
636-725 Windstream PAETEC ITEL, LLC 2011-04-18 yes yes
636-931 AT&T SOUTHWESTERN BELL – yes yes
636-933 AT&T SOUTHWESTERN BELL – yes yes
636-937 AT&T SOUTHWESTERN BELL – 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
SOUTHWESTERN BELL AT&T 3 18.8%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO Verizon 2 12.5%
LEVEL 3 COMMUNICATIONS, LLC - MO Lumen 2 12.5%
T-MOBILE USA, INC. T-Mobile 2 12.5%
CHARTER IP ENABLED SERVICES, LLC Charter 2 12.5%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 6.2%
ONVOY, LLC - MO Onvoy 1 6.2%
TELEPORT COMMUNICATIONS AMERICA, LLC - MO AT&T 1 6.2%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO Verizon 1 6.2%
PAETEC ITEL, LLC Windstream 1 6.2%

Frequently asked

Which prefixes belong to FSSCRSTLCY in area code 636?

16 blocks: 208, 209, 232, 331, 341, 396, 465, 524, 535, 543, 637, 638 and 4 more, all listed in the table above.

Which carriers have numbers in FSSCRSTLCY?

SOUTHWESTERN BELL (3 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - MO (2 blocks), T-MOBILE USA, INC. (2 blocks), CHARTER IP ENABLED SERVICES, LLC (2 blocks), 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 FSSCRSTLCY 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