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

PALACIOS prefixes in area code 361

NANPA records 3 assigned NXX blocks to rate center PALACIOS in area code 361, 0.6% of the 538 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. 2 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (2), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (1). The earliest assignment on record here is 2004-07-22 and the most recent 2004-07-22. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.6% of 361
2 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
361-403 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
361-404 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2004-07-22 yes yes
361-972 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 66.7%
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS Frontier 1 33.3%

Frequently asked

Which prefixes belong to PALACIOS in area code 361?

3 blocks: 403, 404, 972. The table above gives the holder of each.

Which carriers have numbers in PALACIOS?

NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is PALACIOS 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 361

All 538 prefixes in 361