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

CAIRO prefixes in area code 229

NANPA records 8 assigned NXX blocks to rate center CAIRO in area code 229, 1.2% of the 685 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. 4 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - GA (3), WINDSTREAM GEORGIA, INC. (3), CITY OF THOMASVILLE (1). The earliest assignment on record here is 2004-03-17 and the most recent 2023-08-16. 5 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 304, 308, 419, 518 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1.2% of 229
4 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
229-216 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2009-04-23 yes yes
229-307 Windstream WINDSTREAM GEORGIA, INC. – yes yes
229-327 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2004-03-17 yes yes
229-377 Windstream WINDSTREAM GEORGIA, INC. – no yes
229-378 Windstream WINDSTREAM GEORGIA, INC. – no yes
229-397 CITY OF THOMASVILLE 2008-02-26 no yes
229-536 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2014-04-22 yes yes
229-540 Onvoy ONVOY, LLC - GA 2023-08-16 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
NEW CINGULAR WIRELESS PCS, LLC - GA AT&T 3 37.5%
WINDSTREAM GEORGIA, INC. Windstream 3 37.5%
CITY OF THOMASVILLE – 1 12.5%
ONVOY, LLC - GA Onvoy 1 12.5%

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 CAIRO in area code 229?

8 blocks: 216, 307, 327, 377, 378, 397, 536, 540. The table above gives the holder of each.

Which carriers have numbers in CAIRO?

NEW CINGULAR WIRELESS PCS, LLC - GA (3 blocks), WINDSTREAM GEORGIA, INC. (3 blocks), CITY OF THOMASVILLE (1 block), ONVOY, LLC - GA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CAIRO 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 229

All 685 prefixes in 229