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

DEXTER prefixes in area code 573

NANPA records 8 assigned NXX blocks to rate center DEXTER in area code 573, 1.0% of the 786 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. 6 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (2), SOUTHWESTERN BELL (2), LEVEL 3 COMMUNICATIONS, LLC - MO (1). The earliest assignment on record here is 2007-01-08 and the most recent 2021-09-08. 6 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 207, 315, 478, 507 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1% of 573
6 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
573-414 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
573-421 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
573-614 AT&T SOUTHWESTERN BELL – yes yes
573-624 AT&T SOUTHWESTERN BELL – no yes
573-625 Lumen LEVEL 3 COMMUNICATIONS, LLC - MO 2007-01-08 yes yes
573-820 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO – no yes
573-891 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MO 2008-10-01 yes yes
573-935 T-Mobile T-MOBILE USA, INC. 2021-09-08 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 25%
SOUTHWESTERN BELL AT&T 2 25%
LEVEL 3 COMMUNICATIONS, LLC - MO Lumen 1 12.5%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO Verizon 1 12.5%
TELEPORT COMMUNICATIONS AMERICA, LLC - MO AT&T 1 12.5%
T-MOBILE USA, INC. T-Mobile 1 12.5%

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 DEXTER in area code 573?

8 blocks: 414, 421, 614, 624, 625, 820, 891, 935. The table above gives the holder of each.

Which carriers have numbers in DEXTER?

NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), SOUTHWESTERN BELL (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - MO (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - MO (1 block), T-MOBILE USA, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is DEXTER 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 573

All 786 prefixes in 573