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

ALVA prefixes in area code 580

NANPA records 5 assigned NXX blocks to rate center ALVA 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. 3 holders hold those blocks, the largest being SOUTHWESTERN BELL (2), NEW CINGULAR WIRELESS PCS, LLC - IL (2), LEVEL 3 COMMUNICATIONS, LLC - OK (1). The earliest assignment on record here is 2002-03-13 and the most recent 2003-06-09. 5 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

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

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
580-327 AT&T SOUTHWESTERN BELL – yes yes
580-430 AT&T SOUTHWESTERN BELL – yes yes
580-609 Lumen LEVEL 3 COMMUNICATIONS, LLC - OK 2002-03-13 yes yes
580-732 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2002-04-04 yes yes
580-748 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2003-06-09 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
SOUTHWESTERN BELL AT&T 2 40%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 40%
LEVEL 3 COMMUNICATIONS, LLC - OK Lumen 1 20%

Frequently asked

Which prefixes belong to ALVA in area code 580?

5 blocks: 327, 430, 609, 732, 748. The table above gives the holder of each.

Which carriers have numbers in ALVA?

SOUTHWESTERN BELL (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - OK (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ALVA 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