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

E CHICAGO prefixes in area code 219

NANPA records 22 assigned NXX blocks to rate center E CHICAGO in area code 219, 4.4% of the 495 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. 7 holders hold those blocks, the largest being T-MOBILE USA, INC. (10), INDIANA BELL TEL CO INC (7), FIRST COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2002-02-11 and the most recent 2024-04-30. 19 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

22 assigned blocks – 4.4% of 219
7 holders of record
19 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
219-256 T-Mobile T-MOBILE USA, INC. 2007-02-20 yes yes
219-276 T-Mobile T-MOBILE USA, INC. 2012-07-27 yes yes
219-289 T-Mobile T-MOBILE USA, INC. 2021-08-24 yes yes
219-298 T-Mobile T-MOBILE USA, INC. 2022-02-22 yes yes
219-315 T-Mobile T-MOBILE USA, INC. 2013-05-28 yes yes
219-316 T-Mobile T-MOBILE USA, INC. 2013-05-28 yes yes
219-341 T-Mobile T-MOBILE USA, INC. 2023-07-26 yes yes
219-354 FIRST COMMUNICATIONS, LLC 2002-04-16 yes yes
219-377 T-Mobile T-MOBILE USA, INC. 2024-04-30 yes yes
219-378 AT&T INDIANA BELL TEL CO INC – yes yes
219-391 AT&T INDIANA BELL TEL CO INC – no yes
219-392 AT&T INDIANA BELL TEL CO INC – yes yes
219-397 AT&T INDIANA BELL TEL CO INC – no yes
219-398 AT&T INDIANA BELL TEL CO INC – yes yes
219-399 AT&T INDIANA BELL TEL CO INC – no yes
219-413 Bandwidth BANDWIDTH.COM CLEC, LLC - IN 2010-08-11 yes yes
219-466 TON80 COMMUNICATIONS, LLC 2022-02-25 yes yes
219-516 T-Mobile T-MOBILE USA, INC. 2015-09-22 yes yes
219-703 AT&T INDIANA BELL TEL CO INC 2013-10-18 yes yes
219-800 Onvoy ONVOY, LLC - IN 2017-04-25 yes yes
219-801 T-Mobile T-MOBILE USA, INC. 2002-02-11 yes yes
219-804 Lumen CENTURYLINK COMMUNICATIONS, LLC 2013-06-04 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
T-MOBILE USA, INC. T-Mobile 10 45.5%
INDIANA BELL TEL CO INC AT&T 7 31.8%
FIRST COMMUNICATIONS, LLC – 1 4.5%
BANDWIDTH.COM CLEC, LLC - IN Bandwidth 1 4.5%
TON80 COMMUNICATIONS, LLC – 1 4.5%
ONVOY, LLC - IN Onvoy 1 4.5%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 4.5%

Frequently asked

Which prefixes belong to E CHICAGO in area code 219?

22 blocks: 256, 276, 289, 298, 315, 316, 341, 354, 377, 378, 391, 392 and 10 more, all listed in the table above.

Which carriers have numbers in E CHICAGO?

T-MOBILE USA, INC. (10 blocks), INDIANA BELL TEL CO INC (7 blocks), FIRST COMMUNICATIONS, LLC (1 block), BANDWIDTH.COM CLEC, LLC - IN (1 block), TON80 COMMUNICATIONS, LLC (1 block), ONVOY, LLC - IN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is E CHICAGO 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 219

All 495 prefixes in 219