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

KEMAH prefixes in area code 281

NANPA records 18 assigned NXX blocks to rate center KEMAH in area code 281, 2.3% 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 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (14), LEVEL 3 COMMUNICATIONS, LLC - TX (2), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (1). The earliest assignment on record here is 2006-01-05 and the most recent 2006-01-05. 13 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 346, 832 – overlay codes cover the same geography, so a rate center is served by all of them.

18 assigned blocks – 2.3% of 281
4 holders of record
13 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
281-326 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-333 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – no yes
281-334 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – no yes
281-335 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-336 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-339 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-521 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – no yes
281-522 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-523 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – no yes
281-524 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-532 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-535 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-538 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – no yes
281-549 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - TX – yes yes
281-559 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
281-603 Onvoy ONVOY, LLC - TX – yes yes
281-916 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX 2006-01-05 yes yes
281-957 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
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS Frontier 14 77.8%
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 2 11.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - TX AT&T 1 5.6%
ONVOY, LLC - TX Onvoy 1 5.6%

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 KEMAH in area code 281?

18 blocks: 326, 333, 334, 335, 336, 339, 521, 522, 523, 524, 532, 535 and 6 more, all listed in the table above.

Which carriers have numbers in KEMAH?

FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (14 blocks), LEVEL 3 COMMUNICATIONS, LLC - TX (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - TX (1 block), ONVOY, 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 KEMAH 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