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

SUNLD TJNG prefixes in area code 818

NANPA records 9 assigned NXX blocks to rate center SUNLD TJNG in area code 818, 1.2% of the 781 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. 4 holders hold those blocks, the largest being FRONTIER CALIFORNIA INC. (5), LEVEL 3 COMMUNICATIONS, LLC - CA (2), PACIFIC BELL (COMPETITIVE) (1). The earliest assignment on record here is 2012-03-12 and the most recent 2012-03-12. 6 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 code 747 – overlay codes cover the same geography, so a rate center is served by all of them.

9 assigned blocks – 1.2% of 818
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
818-273 Frontier FRONTIER CALIFORNIA INC. – yes yes
818-293 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
818-352 Frontier FRONTIER CALIFORNIA INC. – no yes
818-353 Frontier FRONTIER CALIFORNIA INC. – no yes
818-446 Frontier FRONTIER CALIFORNIA INC. – yes yes
818-473 AT&T PACIFIC BELL (COMPETITIVE) – yes yes
818-875 Charter TWC IP ENABLED SERVICES, LLC 2012-03-12 yes yes
818-925 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
818-951 Frontier FRONTIER CALIFORNIA INC. – 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
FRONTIER CALIFORNIA INC. Frontier 5 55.6%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 22.2%
PACIFIC BELL (COMPETITIVE) AT&T 1 11.1%
TWC IP ENABLED SERVICES, LLC Charter 1 11.1%

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 SUNLD TJNG in area code 818?

9 blocks: 273, 293, 352, 353, 446, 473, 875, 925, 951. The table above gives the holder of each.

Which carriers have numbers in SUNLD TJNG?

FRONTIER CALIFORNIA INC. (5 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), PACIFIC BELL (COMPETITIVE) (1 block), TWC IP ENABLED SERVICES, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SUNLD TJNG 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 818

All 781 prefixes in 818