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

CHURCHHILL prefixes in area code 423

NANPA records 4 assigned NXX blocks to rate center CHURCHHILL in area code 423, 0.5% of the 764 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 UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN (2), BANDWIDTH.COM CLEC, LLC - TN (1), ONVOY, LLC - TN (1). The earliest assignment on record here is 2010-05-28 and the most recent 2018-08-16. 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 410, 667 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 423
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
423-226 Bandwidth BANDWIDTH.COM CLEC, LLC - TN 2010-05-28 yes yes
423-256 Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN – yes yes
423-357 Lumen UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN – no yes
423-770 Onvoy ONVOY, LLC - TN 2018-08-16 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
UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN Lumen 2 50%
BANDWIDTH.COM CLEC, LLC - TN Bandwidth 1 25%
ONVOY, LLC - TN Onvoy 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 CHURCHHILL in area code 423?

4 blocks: 226, 256, 357, 770. The table above gives the holder of each.

Which carriers have numbers in CHURCHHILL?

UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN (2 blocks), BANDWIDTH.COM CLEC, LLC - TN (1 block), ONVOY, LLC - TN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is CHURCHHILL 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 423

All 764 prefixes in 423