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

WILLIS prefixes in area code 936

NANPA records 10 assigned NXX blocks to rate center WILLIS in area code 936, 2.4% of the 422 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. 6 holders hold those blocks, the largest being FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (3), ONVOY, LLC - TX (2), BANDWIDTH.COM CLEC, LLC - TX (2). The earliest assignment on record here is 2002-02-14 and the most recent 2024-05-15. 8 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 540, 734, 785 – overlay codes cover the same geography, so a rate center is served by all of them.

10 assigned blocks – 2.4% of 936
6 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
936-228 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2002-02-14 yes yes
936-249 Onvoy ONVOY, LLC - TX 2016-03-25 yes yes
936-272 Bandwidth BANDWIDTH.COM CLEC, LLC - TX 2017-09-26 yes yes
936-338 T-Mobile METROPCS, INC. 2022-10-25 yes yes
936-403 Onvoy ONVOY, LLC - TX 2024-05-15 yes yes
936-506 Peerless PEERLESS NETWORK OF TEXAS, LLC - TX 2004-08-30 yes yes
936-666 Bandwidth BANDWIDTH.COM CLEC, LLC - TX 2010-09-07 yes yes
936-701 CSC VOICE, LLC 2014-02-04 yes yes
936-856 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – no yes
936-890 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
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS Frontier 3 30%
ONVOY, LLC - TX Onvoy 2 20%
BANDWIDTH.COM CLEC, LLC - TX Bandwidth 2 20%
METROPCS, INC. T-Mobile 1 10%
PEERLESS NETWORK OF TEXAS, LLC - TX Peerless 1 10%
CSC VOICE, LLC – 1 10%

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 WILLIS in area code 936?

10 blocks: 228, 249, 272, 338, 403, 506, 666, 701, 856, 890. The table above gives the holder of each.

Which carriers have numbers in WILLIS?

FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (3 blocks), ONVOY, LLC - TX (2 blocks), BANDWIDTH.COM CLEC, LLC - TX (2 blocks), METROPCS, INC. (1 block), PEERLESS NETWORK OF TEXAS, LLC - TX (1 block), CSC VOICE, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WILLIS 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 936

All 422 prefixes in 936