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

STERLINGTN prefixes in area code 318

NANPA records 3 assigned NXX blocks to rate center STERLINGTN in area code 318, 0.4% of the 765 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 - LA (1), BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (1), ONVOY, LLC - LA (1). The earliest assignment on record here is 2004-10-20 and the most recent 2016-03-09. 3 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 318
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
318-598 Lumen LEVEL 3 COMMUNICATIONS, LLC - LA 2004-10-20 yes yes
318-665 AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL – yes yes
318-667 Onvoy ONVOY, LLC - LA 2016-03-09 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
LEVEL 3 COMMUNICATIONS, LLC - LA Lumen 1 33.3%
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL AT&T 1 33.3%
ONVOY, LLC - LA Onvoy 1 33.3%

Frequently asked

Which prefixes belong to STERLINGTN in area code 318?

3 blocks: 598, 665, 667. The table above gives the holder of each.

Which carriers have numbers in STERLINGTN?

LEVEL 3 COMMUNICATIONS, LLC - LA (1 block), BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (1 block), ONVOY, LLC - LA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is STERLINGTN 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 318

All 765 prefixes in 318