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

GUNTER prefixes in area code 903

NANPA records 6 assigned NXX blocks to rate center GUNTER in area code 903, 0.8% of the 771 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 LEVEL 3 COMMUNICATIONS, LLC - TX (3), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (2), MATRIX TELECOM, LLC. S/I/I TNCI - TX (1). The earliest assignment on record here is 2001-05-07 and the most recent 2008-09-25. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

6 assigned blocks – 0.8% of 903
3 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
903-207 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX 2002-08-19 yes yes
903-228 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2001-05-07 yes yes
903-433 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
903-514 MATRIX TELECOM, LLC. S/I/I TNCI - TX 2008-09-25 no yes
903-551 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – yes yes
903-696 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX – 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
LEVEL 3 COMMUNICATIONS, LLC - TX Lumen 3 50%
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS Frontier 2 33.3%
MATRIX TELECOM, LLC. S/I/I TNCI - TX – 1 16.7%

Frequently asked

Which prefixes belong to GUNTER in area code 903?

6 blocks: 207, 228, 433, 514, 551, 696. The table above gives the holder of each.

Which carriers have numbers in GUNTER?

LEVEL 3 COMMUNICATIONS, LLC - TX (3 blocks), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (2 blocks), MATRIX TELECOM, LLC. S/I/I TNCI - 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 GUNTER 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 903

All 771 prefixes in 903