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

FAIRMOUNT prefixes in area code 409

NANPA records 3 assigned NXX blocks to rate center FAIRMOUNT in area code 409, 0.7% of the 434 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. 2 holders hold those blocks, the largest being VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW (2), ONVOY, LLC - TX (1). The earliest assignment on record here is 2015-07-01 and the most recent 2021-07-06. 2 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, 470, 701, 706 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.7% of 409
2 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
409-226 Windstream VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 2015-07-01 yes yes
409-274 Onvoy ONVOY, LLC - TX 2021-07-06 yes yes
409-579 Windstream VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW – 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
VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW Windstream 2 66.7%
ONVOY, LLC - TX Onvoy 1 33.3%

Frequently asked

Which prefixes belong to FAIRMOUNT in area code 409?

3 blocks: 226, 274, 579. The table above gives the holder of each.

Which carriers have numbers in FAIRMOUNT?

VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW (2 blocks), ONVOY, LLC - 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 FAIRMOUNT 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 409

All 434 prefixes in 409