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

GROESBECK prefixes in area code 254

NANPA records 3 assigned NXX blocks to rate center GROESBECK in area code 254, 0.4% of the 672 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 (1), ONVOY, LLC - TX (1), BRIGHTSPEED OF EASTERN TEXAS, INC. (1). The earliest assignment on record here is 2002-08-09 and the most recent 2002-08-09. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 254
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
254-255 Lumen LEVEL 3 COMMUNICATIONS, LLC - TX 2002-08-09 yes yes
254-645 Onvoy ONVOY, LLC - TX – yes yes
254-729 Brightspeed BRIGHTSPEED OF EASTERN TEXAS, INC. – 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 1 33.3%
ONVOY, LLC - TX Onvoy 1 33.3%
BRIGHTSPEED OF EASTERN TEXAS, INC. Brightspeed 1 33.3%

Frequently asked

Which prefixes belong to GROESBECK in area code 254?

3 blocks: 255, 645, 729. The table above gives the holder of each.

Which carriers have numbers in GROESBECK?

LEVEL 3 COMMUNICATIONS, LLC - TX (1 block), ONVOY, LLC - TX (1 block), BRIGHTSPEED OF EASTERN TEXAS, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is GROESBECK 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 254

All 672 prefixes in 254