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

ALVIN prefixes in area code 281

NANPA records 8 assigned NXX blocks to rate center ALVIN in area code 281, 1.0% of the 786 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 SOUTHWESTERN BELL (5), LEVEL 3 OF TELECOM OF TEXAS, LLC - TX (1), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (1). 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 217, 346, 832 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1% of 281
4 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
281-245 Lumen LEVEL 3 OF TELECOM OF TEXAS, LLC - TX – yes yes
281-299 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX – yes yes
281-331 AT&T SOUTHWESTERN BELL – no yes
281-388 AT&T SOUTHWESTERN BELL – no yes
281-585 AT&T SOUTHWESTERN BELL – no yes
281-756 AT&T SOUTHWESTERN BELL – yes yes
281-824 AT&T SOUTHWESTERN BELL – yes yes
281-968 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – 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 5 62.5%
LEVEL 3 OF TELECOM OF TEXAS, LLC - TX Lumen 1 12.5%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX Verizon 1 12.5%
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 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 ALVIN in area code 281?

8 blocks: 245, 299, 331, 388, 585, 756, 824, 968. The table above gives the holder of each.

Which carriers have numbers in ALVIN?

SOUTHWESTERN BELL (5 blocks), LEVEL 3 OF TELECOM OF TEXAS, LLC - TX (1 block), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (1 block), LEVEL 3 COMMUNICATIONS, LLC - TX (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ALVIN 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 281

All 786 prefixes in 281