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

MONTROSE prefixes in area code 234

NANPA records 3 assigned NXX blocks to rate center MONTROSE in area code 234, 0.8% of the 398 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 T-MOBILE USA, INC. (1), BANDWIDTH.COM CLEC, LLC - OH (1), TELEPORT COMMUNICATIONS AMERICA, LLC - OH (1). The earliest assignment on record here is 2002-04-15 and the most recent 2023-01-23. 3 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 217, 272, 319, 330 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.8% of 234
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
234-257 T-Mobile T-MOBILE USA, INC. 2018-10-23 yes yes
234-365 Bandwidth BANDWIDTH.COM CLEC, LLC - OH 2023-01-23 yes yes
234-466 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - OH 2002-04-15 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
T-MOBILE USA, INC. T-Mobile 1 33.3%
BANDWIDTH.COM CLEC, LLC - OH Bandwidth 1 33.3%
TELEPORT COMMUNICATIONS AMERICA, LLC - OH AT&T 1 33.3%

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 MONTROSE in area code 234?

3 blocks: 257, 365, 466. The table above gives the holder of each.

Which carriers have numbers in MONTROSE?

T-MOBILE USA, INC. (1 block), BANDWIDTH.COM CLEC, LLC - OH (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - OH (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MONTROSE 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 234

All 398 prefixes in 234