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

CMTN GRDN prefixes in area code 562

NANPA records 15 assigned NXX blocks to rate center CMTN GRDN in area code 562, 2.1% of the 702 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. 2 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC (14), SPOK, INC. (1). 3 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 213, 310, 424 – overlay codes cover the same geography, so a rate center is served by all of them.

15 assigned blocks – 2.1% of 562
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
562-260 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-300 Spok SPOK, INC. – no yes
562-301 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-397 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-715 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-761 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-773 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-818 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-857 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-858 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-882 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-883 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
562-895 AT&T NEW CINGULAR WIRELESS PCS, LLC – no yes
562-897 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
562-899 AT&T NEW CINGULAR WIRELESS PCS, LLC – 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
NEW CINGULAR WIRELESS PCS, LLC AT&T 14 93.3%
SPOK, INC. Spok 1 6.7%

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 CMTN GRDN in area code 562?

15 blocks: 260, 300, 301, 397, 715, 761, 773, 818, 857, 858, 882, 883 and 3 more, all listed in the table above.

Which carriers have numbers in CMTN GRDN?

NEW CINGULAR WIRELESS PCS, LLC (14 blocks), SPOK, 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 CMTN GRDN 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 562

All 702 prefixes in 562