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

BLACKWELL prefixes in area code 325

NANPA records 5 assigned NXX blocks to rate center BLACKWELL in area code 325, 1.2% of the 408 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 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW (2), ONVOY, LLC - TX (2), AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX (1). The earliest assignment on record here is 2010-05-10 and the most recent 2023-09-06. 3 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 code 580 – overlay codes cover the same geography, so a rate center is served by all of them.

5 assigned blocks – 1.2% of 325
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
325-237 Windstream VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 2018-01-19 yes yes
325-241 Onvoy ONVOY, LLC - TX 2017-03-14 yes yes
325-264 AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 2010-05-10 no yes
325-282 Windstream VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW – no yes
325-346 Onvoy ONVOY, LLC - TX 2023-09-06 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
VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW Windstream 2 40%
ONVOY, LLC - TX Onvoy 2 40%
AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX – 1 20%

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 BLACKWELL in area code 325?

5 blocks: 237, 241, 264, 282, 346. The table above gives the holder of each.

Which carriers have numbers in BLACKWELL?

VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW (2 blocks), ONVOY, LLC - TX (2 blocks), AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-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 BLACKWELL 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 325

All 408 prefixes in 325