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

DOLORES prefixes in area code 970

NANPA records 4 assigned NXX blocks to rate center DOLORES in area code 970, 0.5% 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. 4 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC (1), ONVOY, LLC - CO (1), TON80 COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2003-08-06 and the most recent 2022-02-17. 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 code 956 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 970
4 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
970-394 AT&T NEW CINGULAR WIRELESS PCS, LLC 2003-08-06 yes yes
970-676 Onvoy ONVOY, LLC - CO 2007-10-15 yes yes
970-733 TON80 COMMUNICATIONS, LLC 2022-02-17 yes yes
970-882 Lumen CENTURYTEL OF EAGLE, INC. DBA CENTURYLINK – 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 1 25%
ONVOY, LLC - CO Onvoy 1 25%
TON80 COMMUNICATIONS, LLC – 1 25%
CENTURYTEL OF EAGLE, INC. DBA CENTURYLINK Lumen 1 25%

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 DOLORES in area code 970?

4 blocks: 394, 676, 733, 882. The table above gives the holder of each.

Which carriers have numbers in DOLORES?

NEW CINGULAR WIRELESS PCS, LLC (1 block), ONVOY, LLC - CO (1 block), TON80 COMMUNICATIONS, LLC (1 block), CENTURYTEL OF EAGLE, INC. DBA CENTURYLINK (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is DOLORES 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 970

All 786 prefixes in 970