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

CMTN GRDN prefixes in area code 213

NANPA records 6 assigned NXX blocks to rate center CMTN GRDN in area code 213, 0.8% of the 786 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 NEW CINGULAR WIRELESS PCS, LLC (3), 33 WIRELESS INC. (2), 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 310, 424, 562 – overlay codes cover the same geography, so a rate center is served by all of them.

6 assigned blocks – 0.8% of 213
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
213-208 Spok SPOK, INC. – no yes
213-324 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
213-366 33 WIRELESS INC. – no yes
213-445 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
213-591 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
213-710 33 WIRELESS 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
NEW CINGULAR WIRELESS PCS, LLC AT&T 3 50%
33 WIRELESS INC. – 2 33.3%
SPOK, INC. Spok 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 CMTN GRDN in area code 213?

6 blocks: 208, 324, 366, 445, 591, 710. The table above gives the holder of each.

Which carriers have numbers in CMTN GRDN?

NEW CINGULAR WIRELESS PCS, LLC (3 blocks), 33 WIRELESS INC. (2 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 213

All 786 prefixes in 213