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

ELMHURST prefixes in area code 630

NANPA records 44 assigned NXX blocks to rate center ELMHURST in area code 630, 5.6% of the 782 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. 12 holders hold those blocks, the largest being ILLINOIS BELL TEL CO (16), T-MOBILE USA, INC. (10), LEVEL 3 COMMUNICATIONS, LLC - IL (4). The earliest assignment on record here is 2001-01-03 and the most recent 2024-07-24. 32 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 code 331 – overlay codes cover the same geography, so a rate center is served by all of them.

44 assigned blocks – 5.6% of 630
12 holders of record
32 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
630-279 AT&T ILLINOIS BELL TEL CO – no yes
630-330 T-Mobile T-MOBILE USA, INC. – yes yes
630-331 Onvoy ONVOY, LLC 2023-06-26 yes yes
630-333 T-Mobile T-MOBILE USA, INC. – yes yes
630-349 Vonage VONAGE AMERICA LLC 2019-10-10 yes yes
630-359 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL – yes yes
630-379 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL – yes yes
630-415 AT&T ILLINOIS BELL TEL CO – yes yes
630-433 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
630-458 AT&T ILLINOIS BELL TEL CO – yes yes
630-478 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL – yes yes
630-491 Peerless PEERLESS NETWORK OF ILLINOIS, LLC - IL 2011-03-01 yes yes
630-501 Comcast COMCAST IP PHONE, LLC – yes yes
630-516 AT&T ILLINOIS BELL TEL CO – no yes
630-530 AT&T ILLINOIS BELL TEL CO – no yes
630-532 Windstream PAETEC ITEL, LLC 2001-04-11 yes yes
630-543 AT&T ILLINOIS BELL TEL CO – no yes
630-546 T-Mobile T-MOBILE USA, INC. 2002-06-17 yes yes
630-559 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL – yes yes
630-563 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL – yes yes
630-589 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL – yes yes
630-592 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL – yes yes
630-600 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL – yes yes
630-607 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL – yes yes
630-617 AT&T ILLINOIS BELL TEL CO – yes yes
630-628 AT&T ILLINOIS BELL TEL CO – no yes
630-666 T-Mobile T-MOBILE USA, INC. 2007-05-22 yes yes
630-688 T-Mobile T-MOBILE USA, INC. 2001-02-14 yes yes
630-749 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL – yes yes
630-758 AT&T ILLINOIS BELL TEL CO – no yes
630-763 T-Mobile T-MOBILE USA, INC. 2024-07-24 yes yes
630-776 T-Mobile T-MOBILE USA, INC. 2001-01-03 yes yes
630-782 AT&T ILLINOIS BELL TEL CO – no yes
630-808 T-Mobile T-MOBILE USA, INC. 2006-10-03 yes yes
630-832 AT&T ILLINOIS BELL TEL CO – no yes
630-833 AT&T ILLINOIS BELL TEL CO – no yes
630-834 AT&T ILLINOIS BELL TEL CO – no yes
630-835 Windstream PAETEC ITEL, LLC – yes yes
630-903 T-Mobile T-MOBILE USA, INC. 2005-03-22 yes yes
630-930 T-Mobile T-MOBILE USA, INC. – yes yes
630-936 Lumen LEVEL 3 COMMUNICATIONS, LLC - IL – yes yes
630-941 AT&T ILLINOIS BELL TEL CO – no yes
630-956 AT&T ILLINOIS BELL TEL CO 2003-01-31 yes yes
630-993 AT&T ILLINOIS BELL TEL CO – 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
ILLINOIS BELL TEL CO AT&T 16 36.4%
T-MOBILE USA, INC. T-Mobile 10 22.7%
LEVEL 3 COMMUNICATIONS, LLC - IL Lumen 4 9.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - IL AT&T 3 6.8%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL Verizon 3 6.8%
PAETEC ITEL, LLC Windstream 2 4.5%
ONVOY, LLC Onvoy 1 2.3%
VONAGE AMERICA LLC Vonage 1 2.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 2.3%
PEERLESS NETWORK OF ILLINOIS, LLC - IL Peerless 1 2.3%
COMCAST IP PHONE, LLC Comcast 1 2.3%
RCN TELECOM SERVICES OF ILLINIOS, INC. - IL – 1 2.3%

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 ELMHURST in area code 630?

44 blocks: 279, 330, 331, 333, 349, 359, 379, 415, 433, 458, 478, 491 and 32 more, all listed in the table above.

Which carriers have numbers in ELMHURST?

ILLINOIS BELL TEL CO (16 blocks), T-MOBILE USA, INC. (10 blocks), LEVEL 3 COMMUNICATIONS, LLC - IL (4 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - IL (3 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL (3 blocks), PAETEC ITEL, LLC (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ELMHURST 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 630

All 782 prefixes in 630