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

WBLLFOURCH prefixes in area code 307

NANPA records 3 assigned NXX blocks to rate center WBLLFOURCH in area code 307, 0.6% of the 499 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 - WY (2), QWEST CORPORATION (1). The earliest assignment on record here is 2017-04-19 and the most recent 2023-05-24. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.6% of 307
2 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
307-405 Onvoy ONVOY, LLC - WY 2023-05-24 yes yes
307-785 Onvoy ONVOY, LLC - WY 2017-04-19 yes yes
307-896 Lumen QWEST CORPORATION – 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
ONVOY, LLC - WY Onvoy 2 66.7%
QWEST CORPORATION Lumen 1 33.3%

Frequently asked

Which prefixes belong to WBLLFOURCH in area code 307?

3 blocks: 405, 785, 896. The table above gives the holder of each.

Which carriers have numbers in WBLLFOURCH?

ONVOY, LLC - WY (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 WBLLFOURCH 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 307

All 499 prefixes in 307