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

GRAND LAKE prefixes in area code 970

NANPA records 3 assigned NXX blocks to rate center GRAND LAKE in area code 970, 0.4% 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. 2 holders hold those blocks, the largest being ONVOY, LLC - CO (2), QWEST CORPORATION (1). The earliest assignment on record here is 2006-10-26 and the most recent 2019-08-16. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 970
2 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
970-627 Lumen QWEST CORPORATION – yes yes
970-709 Onvoy ONVOY, LLC - CO 2019-08-16 yes yes
970-798 Onvoy ONVOY, LLC - CO 2006-10-26 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
ONVOY, LLC - CO Onvoy 2 66.7%
QWEST CORPORATION Lumen 1 33.3%

Frequently asked

Which prefixes belong to GRAND LAKE in area code 970?

3 blocks: 627, 709, 798. The table above gives the holder of each.

Which carriers have numbers in GRAND LAKE?

ONVOY, LLC - CO (2 blocks), QWEST CORPORATION (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is GRAND LAKE 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