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

WARSAW prefixes in area code 574

NANPA records 13 assigned NXX blocks to rate center WARSAW in area code 574, 3.2% of the 403 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. 5 holders hold those blocks, the largest being BRIGHTSPEED OF INDIANA, LLC (6), T-MOBILE USA, INC. (2), ONVOY, LLC - IN (2). The earliest assignment on record here is 2001-03-30 and the most recent 2024-03-13. 9 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 217, 472, 585, 660 – overlay codes cover the same geography, so a rate center is served by all of them.

13 assigned blocks – 3.2% of 574
5 holders of record
9 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
574-265 T-Mobile T-MOBILE USA, INC. 2001-03-30 yes yes
574-267 Brightspeed BRIGHTSPEED OF INDIANA, LLC – no yes
574-268 Brightspeed BRIGHTSPEED OF INDIANA, LLC – yes yes
574-269 Brightspeed BRIGHTSPEED OF INDIANA, LLC – no yes
574-306 Lumen LEVEL 3 COMMUNICATIONS, LLC - IN 2002-05-10 yes yes
574-371 Brightspeed BRIGHTSPEED OF INDIANA, LLC – yes yes
574-372 Brightspeed BRIGHTSPEED OF INDIANA, LLC – no yes
574-373 Brightspeed BRIGHTSPEED OF INDIANA, LLC 2016-09-12 yes yes
574-376 T-Mobile T-MOBILE USA, INC. 2002-03-14 yes yes
574-385 Onvoy ONVOY, LLC - IN – yes yes
574-394 Onvoy ONVOY, LLC - IN 2024-03-13 yes yes
574-549 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
574-551 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – 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
BRIGHTSPEED OF INDIANA, LLC Brightspeed 6 46.2%
T-MOBILE USA, INC. T-Mobile 2 15.4%
ONVOY, LLC - IN Onvoy 2 15.4%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 15.4%
LEVEL 3 COMMUNICATIONS, LLC - IN Lumen 1 7.7%

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 WARSAW in area code 574?

13 blocks: 265, 267, 268, 269, 306, 371, 372, 373, 376, 385, 394, 549 and 1 more, all listed in the table above.

Which carriers have numbers in WARSAW?

BRIGHTSPEED OF INDIANA, LLC (6 blocks), T-MOBILE USA, INC. (2 blocks), ONVOY, LLC - IN (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), LEVEL 3 COMMUNICATIONS, 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 WARSAW 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 574

All 403 prefixes in 574