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

JULESBURG prefixes in area code 970

NANPA records 4 assigned NXX blocks to rate center JULESBURG 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. 2 holders hold those blocks, the largest being QWEST CORPORATION (2), ONVOY, LLC - CO (2). The earliest assignment on record here is 2019-08-16 and the most recent 2026-10-16. 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

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

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
970-463 Lumen QWEST CORPORATION – yes yes
970-474 Lumen QWEST CORPORATION – yes yes
970-647 Onvoy ONVOY, LLC - CO 2019-08-16 yes yes
970-952 Onvoy ONVOY, LLC - CO 2026-10-16 yes no

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
QWEST CORPORATION Lumen 2 50%
ONVOY, LLC - CO Onvoy 2 50%

Frequently asked

Which prefixes belong to JULESBURG in area code 970?

4 blocks: 463, 474, 647, 952. The table above gives the holder of each.

Which carriers have numbers in JULESBURG?

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

Is JULESBURG 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