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

ENCINITAS prefixes in area code 442

NANPA records 6 assigned NXX blocks to rate center ENCINITAS in area code 442, 1.7% of the 356 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2), T-MOBILE USA, INC. (2), VONAGE AMERICA LLC (1). The earliest assignment on record here is 2020-06-29 and the most recent 2023-08-10. 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 760 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 1.7% of 442
4 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
442-320 Vonage VONAGE AMERICA LLC 2020-06-29 yes yes
442-357 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2021-04-02 yes yes
442-369 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2021-09-23 yes yes
442-390 T-Mobile T-MOBILE USA, INC. 2022-07-14 yes yes
442-413 T-Mobile T-MOBILE USA, INC. 2023-08-10 yes yes
442-568 TON80 COMMUNICATIONS, LLC 2022-02-21 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 2 33.3%
T-MOBILE USA, INC. T-Mobile 2 33.3%
VONAGE AMERICA LLC Vonage 1 16.7%
TON80 COMMUNICATIONS, LLC – 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 ENCINITAS in area code 442?

6 blocks: 320, 357, 369, 390, 413, 568. The table above gives the holder of each.

Which carriers have numbers in ENCINITAS?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2 blocks), T-MOBILE USA, INC. (2 blocks), VONAGE AMERICA LLC (1 block), TON80 COMMUNICATIONS, 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 ENCINITAS 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 442

All 356 prefixes in 442