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

EARLIMART prefixes in area code 661

NANPA records 6 assigned NXX blocks to rate center EARLIMART in area code 661, 0.9% of the 674 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. 5 holders hold those blocks, the largest being LEVEL 3 COMMUNICATIONS, LLC - CA (2), METROPCS, INC. (1), IP HORIZON LLC (1). 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

6 assigned blocks – 0.9% of 661
5 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
661-344 T-Mobile METROPCS, INC. – yes yes
661-552 IP HORIZON LLC – yes yes
661-668 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
661-731 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
661-849 AT&T PACIFIC BELL – yes yes
661-851 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – 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 - CA Lumen 2 33.3%
METROPCS, INC. T-Mobile 1 16.7%
IP HORIZON LLC – 1 16.7%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 16.7%
PACIFIC BELL AT&T 1 16.7%

Frequently asked

Which prefixes belong to EARLIMART in area code 661?

6 blocks: 344, 552, 668, 731, 849, 851. The table above gives the holder of each.

Which carriers have numbers in EARLIMART?

LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), METROPCS, INC. (1 block), IP HORIZON LLC (1 block), LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (1 block), PACIFIC BELL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is EARLIMART 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 661

All 674 prefixes in 661