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

ROCKFORD prefixes in area code 815

NANPA records 89 assigned NXX blocks to rate center ROCKFORD in area code 815, 11.3% 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. 18 holders hold those blocks, the largest being ILLINOIS BELL TEL CO (37), UNITED STATES CELLULAR - IL (11), T-MOBILE USA, INC. (10). The earliest assignment on record here is 2001-01-24 and the most recent 2019-11-20. 46 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 256, 419, 509, 567 – overlay codes cover the same geography, so a rate center is served by all of them.

89 assigned blocks – 11.3% of 815
18 holders of record
46 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
815-209 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL 2002-02-04 yes yes
815-218 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-222 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-226 AT&T ILLINOIS BELL TEL CO – no yes
815-227 AT&T ILLINOIS BELL TEL CO – yes yes
815-229 AT&T ILLINOIS BELL TEL CO – no yes
815-231 AT&T ILLINOIS BELL TEL CO – yes yes
815-243 UNITED STATES CELLULAR - IL – yes yes
815-262 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-282 AT&T ILLINOIS BELL TEL CO – no yes
815-289 UNITED STATES CELLULAR - IL – yes yes
815-296 Telnyx TELNYX LLC 2019-11-20 yes yes
815-298 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-299 UNITED STATES CELLULAR - IL – yes yes
815-312 Onvoy ONVOY, LLC 2008-12-15 yes yes
815-315 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL – yes yes
815-316 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL – no yes
815-319 UNITED STATES CELLULAR - IL – yes yes
815-329 AT&T AT&T ENTERPRISES, LLC 2013-03-11 yes yes
815-378 T-Mobile T-MOBILE USA, INC. – yes yes
815-381 AT&T ILLINOIS BELL TEL CO – no yes
815-387 AT&T ILLINOIS BELL TEL CO – no yes
815-391 AT&T ILLINOIS BELL TEL CO – yes yes
815-394 AT&T ILLINOIS BELL TEL CO – yes yes
815-395 AT&T ILLINOIS BELL TEL CO – no yes
815-397 AT&T ILLINOIS BELL TEL CO – no yes
815-398 AT&T ILLINOIS BELL TEL CO – no yes
815-399 AT&T ILLINOIS BELL TEL CO – no yes
815-420 Onvoy ONVOY, LLC – yes yes
815-470 AT&T ILLINOIS BELL TEL CO – no yes
815-480 Spok SPOK, INC. 2001-03-22 no yes
815-484 AT&T ILLINOIS BELL TEL CO – yes yes
815-489 AT&T ILLINOIS BELL TEL CO – yes yes
815-490 AT&T ILLINOIS BELL TEL CO – no yes
815-491 NUSO, LLC 2013-03-13 yes yes
815-494 UNITED STATES CELLULAR - IL – yes yes
815-505 T-Mobile T-MOBILE USA, INC. – no yes
815-509 T-Mobile T-MOBILE USA, INC. – yes yes
815-516 T-Mobile T-MOBILE USA, INC. 2001-01-24 yes yes
815-519 T-Mobile T-MOBILE USA, INC. – yes yes
815-520 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-540 T-Mobile T-MOBILE USA, INC. – yes yes
815-543 UNITED STATES CELLULAR - IL – yes yes
815-558 UNITED STATES CELLULAR - IL – yes yes
815-601 UNITED STATES CELLULAR - IL – yes yes
815-608 T-Mobile T-MOBILE USA, INC. 2002-09-30 yes yes
815-621 T-Mobile T-MOBILE USA, INC. – yes yes
815-633 AT&T ILLINOIS BELL TEL CO – no yes
815-636 AT&T ILLINOIS BELL TEL CO – no yes
815-637 AT&T ILLINOIS BELL TEL CO – no yes
815-639 AT&T ILLINOIS BELL TEL CO – no yes
815-654 AT&T ILLINOIS BELL TEL CO – no yes
815-668 Onvoy ONVOY, LLC 2009-04-02 yes yes
815-670 T-Mobile T-MOBILE USA, INC. – yes yes
815-703 T-Mobile T-MOBILE USA, INC. 2002-06-04 yes yes
815-706 EXIANT COMMUNICATIONS LLC 2019-09-03 yes yes
815-708 Comcast COMCAST IP PHONE, LLC 2006-06-23 yes yes
815-713 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2001-09-28 yes yes
815-720 AT&T ILLINOIS BELL TEL CO – no yes
815-721 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL – yes yes
815-742 UNITED STATES CELLULAR - IL – yes yes
815-847 AT&T AT&T ENTERPRISES, LLC 2005-04-18 yes yes
815-870 Spok SPOK, INC. – no yes
815-871 UNITED STATES CELLULAR - IL – yes yes
815-877 AT&T ILLINOIS BELL TEL CO – no yes
815-904 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2006-08-31 yes yes
815-914 T-Mobile METROPCS, INC. – yes yes
815-921 AT&T ILLINOIS BELL TEL CO 2001-04-27 yes yes
815-961 AT&T ILLINOIS BELL TEL CO – no yes
815-962 AT&T ILLINOIS BELL TEL CO – no yes
815-963 AT&T ILLINOIS BELL TEL CO – no yes
815-964 AT&T ILLINOIS BELL TEL CO – no yes
815-965 AT&T ILLINOIS BELL TEL CO – no yes
815-966 AT&T ILLINOIS BELL TEL CO – no yes
815-967 AT&T ILLINOIS BELL TEL CO – no yes
815-968 AT&T ILLINOIS BELL TEL CO – no yes
815-969 AT&T ILLINOIS BELL TEL CO – yes yes
815-971 AT&T ILLINOIS BELL TEL CO – no yes
815-972 AT&T ILLINOIS BELL TEL CO – no yes
815-977 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 2003-06-25 yes yes
815-978 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-979 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-980 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2006-06-15 yes yes
815-983 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
815-985 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL – no yes
815-986 Windstream PAETEC ITEL, LLC – no yes
815-987 AT&T ILLINOIS BELL TEL CO – no yes
815-988 UNITED STATES CELLULAR - IL – yes yes
815-997 Windstream PAETEC ITEL, LLC 2003-03-26 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 37 41.6%
UNITED STATES CELLULAR - IL – 11 12.4%
T-MOBILE USA, INC. T-Mobile 10 11.2%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL Verizon 9 10.1%
LEVEL 3 COMMUNICATIONS, LLC - IL Lumen 3 3.4%
ONVOY, LLC Onvoy 3 3.4%
AT&T ENTERPRISES, LLC AT&T 2 2.2%
SPOK, INC. Spok 2 2.2%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 2.2%
PAETEC ITEL, LLC Windstream 2 2.2%
TELNYX LLC Telnyx 1 1.1%
NUSO, LLC – 1 1.1%
EXIANT COMMUNICATIONS LLC – 1 1.1%
COMCAST IP PHONE, LLC Comcast 1 1.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - IL AT&T 1 1.1%
METROPCS, INC. T-Mobile 1 1.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL Verizon 1 1.1%
AMERICAN MESSAGING SERVICES, LLC American Messaging 1 1.1%

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 ROCKFORD in area code 815?

89 blocks: 209, 218, 222, 226, 227, 229, 231, 243, 262, 282, 289, 296 and 77 more, all listed in the table above.

Which carriers have numbers in ROCKFORD?

ILLINOIS BELL TEL CO (37 blocks), UNITED STATES CELLULAR - IL (11 blocks), T-MOBILE USA, INC. (10 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (9 blocks), LEVEL 3 COMMUNICATIONS, LLC - IL (3 blocks), ONVOY, LLC (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ROCKFORD 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 815

All 786 prefixes in 815