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

LOUISVILLE prefixes in area code 478

NANPA records 6 assigned NXX blocks to rate center LOUISVILLE in area code 478, 1.3% of the 446 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. 6 holders hold those blocks, the largest being BANDWIDTH.COM CLEC, LLC - GA (1), AT&T ENTERPRISES, LLC (1), ONVOY, LLC - GA (1). The earliest assignment on record here is 2003-04-09 and the most recent 2023-06-27. 5 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 234, 330, 334, 402 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 1.3% of 478
6 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
478-241 Bandwidth BANDWIDTH.COM CLEC, LLC - GA 2018-03-16 yes yes
478-253 AT&T AT&T ENTERPRISES, LLC 2013-10-11 yes yes
478-373 Onvoy ONVOY, LLC - GA 2023-06-27 yes yes
478-377 AT&T NEW CINGULAR WIRELESS PCS, LLC - GA 2003-04-09 yes yes
478-625 AT&T BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL – no yes
478-900 TERRA NOVA TELECOM INC. 2019-03-12 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
BANDWIDTH.COM CLEC, LLC - GA Bandwidth 1 16.7%
AT&T ENTERPRISES, LLC AT&T 1 16.7%
ONVOY, LLC - GA Onvoy 1 16.7%
NEW CINGULAR WIRELESS PCS, LLC - GA AT&T 1 16.7%
BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL AT&T 1 16.7%
TERRA NOVA TELECOM INC. – 1 16.7%

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 LOUISVILLE in area code 478?

6 blocks: 241, 253, 373, 377, 625, 900. The table above gives the holder of each.

Which carriers have numbers in LOUISVILLE?

BANDWIDTH.COM CLEC, LLC - GA (1 block), AT&T ENTERPRISES, LLC (1 block), ONVOY, LLC - GA (1 block), NEW CINGULAR WIRELESS PCS, LLC - GA (1 block), BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL (1 block), TERRA NOVA TELECOM 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 LOUISVILLE 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 478

All 446 prefixes in 478