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

MARIETTA prefixes in area code 580

NANPA records 5 assigned NXX blocks to rate center MARIETTA in area code 580, 0.7% of the 741 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 UNITED STATES CELLULAR - OK (1), SOUTHWESTERN BELL (1), CHICKASAW TELECOMMUNICAIONS SERVICES, INC. (1). The earliest assignment on record here is 2001-05-01 and the most recent 2003-03-04. 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 220, 223, 309, 317 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 0.7% of 580
5 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
580-238 UNITED STATES CELLULAR - OK 2001-05-01 yes yes
580-276 AT&T SOUTHWESTERN BELL – yes yes
580-282 CHICKASAW TELECOMMUNICAIONS SERVICES, INC. 2003-03-04 yes yes
580-300 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK – yes yes
580-812 T-Mobile T-MOBILE USA, INC. 2002-05-23 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
UNITED STATES CELLULAR - OK – 1 20%
SOUTHWESTERN BELL AT&T 1 20%
CHICKASAW TELECOMMUNICAIONS SERVICES, INC. – 1 20%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK Verizon 1 20%
T-MOBILE USA, INC. T-Mobile 1 20%

Frequently asked

Which prefixes belong to MARIETTA in area code 580?

5 blocks: 238, 276, 282, 300, 812. The table above gives the holder of each.

Which carriers have numbers in MARIETTA?

UNITED STATES CELLULAR - OK (1 block), SOUTHWESTERN BELL (1 block), CHICKASAW TELECOMMUNICAIONS SERVICES, INC. (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK (1 block), T-MOBILE USA, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MARIETTA 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 580

All 741 prefixes in 580