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

MT VERNON prefixes in area code 618

NANPA records 14 assigned NXX blocks to rate center MT VERNON in area code 618, 1.8% 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. 8 holders hold those blocks, the largest being ILLINOIS BELL TEL CO (4), T-MOBILE USA, INC. (3), NEW CINGULAR WIRELESS PCS, LLC - IL (2). The earliest assignment on record here is 2006-04-28 and the most recent 2021-10-29. 11 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, 251, 319, 360 – overlay codes cover the same geography, so a rate center is served by all of them.

14 assigned blocks – 1.8% of 618
8 holders of record
11 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
618-204 T-Mobile T-MOBILE USA, INC. – yes yes
618-214 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
618-241 AT&T ILLINOIS BELL TEL CO – yes yes
618-242 AT&T ILLINOIS BELL TEL CO – no yes
618-244 AT&T ILLINOIS BELL TEL CO – no yes
618-246 AT&T ILLINOIS BELL TEL CO – yes yes
618-315 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
618-316 T-Mobile T-MOBILE USA, INC. – yes yes
618-417 T-Mobile METROPCS, INC. 2017-02-01 yes yes
618-472 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2010-04-13 yes yes
618-731 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2007-06-05 yes yes
618-809 T-Mobile T-MOBILE USA, INC. 2021-10-29 yes yes
618-816 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL 2006-04-28 yes yes
618-899 MCC NETWORK SERVICES, LLC 2007-06-05 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
ILLINOIS BELL TEL CO AT&T 4 28.6%
T-MOBILE USA, INC. T-Mobile 3 21.4%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 14.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL Verizon 1 7.1%
METROPCS, INC. T-Mobile 1 7.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - IL AT&T 1 7.1%
LEVEL 3 COMMUNICATIONS, LLC - IL Lumen 1 7.1%
MCC NETWORK SERVICES, LLC – 1 7.1%

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 MT VERNON in area code 618?

14 blocks: 204, 214, 241, 242, 244, 246, 315, 316, 417, 472, 731, 809 and 2 more, all listed in the table above.

Which carriers have numbers in MT VERNON?

ILLINOIS BELL TEL CO (4 blocks), T-MOBILE USA, INC. (3 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (1 block), METROPCS, INC. (1 block), TELEPORT COMMUNICATIONS AMERICA, 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 MT VERNON 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 618

All 786 prefixes in 618