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

DEERFIELD prefixes in area code 224

NANPA records 20 assigned NXX blocks to rate center DEERFIELD in area code 224, 3.4% of the 595 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 NEW CINGULAR WIRELESS PCS, LLC - IL (6), T-MOBILE USA, INC. (3), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (3). The earliest assignment on record here is 2001-11-13 and the most recent 2024-02-20. 18 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 417, 517, 540, 603 – overlay codes cover the same geography, so a rate center is served by all of them.

20 assigned blocks – 3.4% of 224
10 holders of record
18 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
224-284 T-Mobile T-MOBILE USA, INC. 2018-01-31 yes yes
224-285 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2019-03-18 yes yes
224-300 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
224-373 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2021-02-11 yes yes
224-453 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2022-01-31 yes yes
224-461 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2022-05-11 yes yes
224-482 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2022-08-24 yes yes
224-507 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2014-12-19 yes yes
224-515 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2005-03-18 yes yes
224-533 FIRST COMMUNICATIONS, LLC 2006-04-11 yes yes
224-551 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2016-08-26 yes yes
224-554 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2006-05-19 yes yes
224-589 Onvoy ONVOY, LLC 2024-02-20 yes yes
224-619 T-Mobile T-MOBILE USA, INC. 2001-11-13 yes yes
224-632 AT&T ILLINOIS BELL TEL CO 2002-09-23 yes yes
224-727 T-Mobile T-MOBILE USA, INC. 2014-11-06 yes yes
224-804 Bandwidth BANDWIDTH.COM CLEC, LLC - IL 2013-06-12 yes yes
224-813 Lumen CENTURYLINK COMMUNICATIONS, LLC 2013-06-04 yes yes
224-940 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2002-01-28 no yes
224-948 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2001-11-28 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 6 30%
T-MOBILE USA, INC. T-Mobile 3 15%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL Verizon 3 15%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 2 10%
FIRST COMMUNICATIONS, LLC – 1 5%
TELEPORT COMMUNICATIONS AMERICA, LLC - IL AT&T 1 5%
ONVOY, LLC Onvoy 1 5%
ILLINOIS BELL TEL CO AT&T 1 5%
BANDWIDTH.COM CLEC, LLC - IL Bandwidth 1 5%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 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 DEERFIELD in area code 224?

20 blocks: 284, 285, 300, 373, 453, 461, 482, 507, 515, 533, 551, 554 and 8 more, all listed in the table above.

Which carriers have numbers in DEERFIELD?

NEW CINGULAR WIRELESS PCS, LLC - IL (6 blocks), T-MOBILE USA, INC. (3 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (3 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), FIRST COMMUNICATIONS, LLC (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 DEERFIELD 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 224

All 595 prefixes in 224