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

MT VERNON prefixes in area code 903

NANPA records 4 assigned NXX blocks to rate center MT VERNON in area code 903, 0.5% 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. 4 holders hold those blocks, the largest being CSC VOICE, LLC (1), T-MOBILE USA, INC. (1), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (1). The earliest assignment on record here is 2022-04-18 and the most recent 2022-04-18. 4 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 207, 251, 319, 360 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 903
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
903-270 CSC VOICE, LLC – yes yes
903-466 T-Mobile T-MOBILE USA, INC. – yes yes
903-537 Frontier FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS – yes yes
903-867 Charter TWC IP ENABLED SERVICES, LLC 2022-04-18 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
CSC VOICE, LLC – 1 25%
T-MOBILE USA, INC. T-Mobile 1 25%
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS Frontier 1 25%
TWC IP ENABLED SERVICES, LLC Charter 1 25%

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 MT VERNON in area code 903?

4 blocks: 270, 466, 537, 867. The table above gives the holder of each.

Which carriers have numbers in MT VERNON?

CSC VOICE, LLC (1 block), T-MOBILE USA, INC. (1 block), FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS (1 block), TWC IP ENABLED SERVICES, 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 MT VERNON 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