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

OOLTEWAH prefixes in area code 423

NANPA records 3 assigned NXX blocks to rate center OOLTEWAH in area code 423, 0.4% 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 BRIGHTSPEED OF SOUTHERN TENNESSEE, LC (1), ONVOY, LLC - TN (1), COMCAST IP PHONE, LLC (1). The earliest assignment on record here is 2007-03-19 and the most recent 2021-04-13. 2 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 423
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
423-238 Brightspeed BRIGHTSPEED OF SOUTHERN TENNESSEE, LC – no yes
423-679 Onvoy ONVOY, LLC - TN 2021-04-13 yes yes
423-910 Comcast COMCAST IP PHONE, LLC 2007-03-19 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
BRIGHTSPEED OF SOUTHERN TENNESSEE, LC Brightspeed 1 33.3%
ONVOY, LLC - TN Onvoy 1 33.3%
COMCAST IP PHONE, LLC Comcast 1 33.3%

Frequently asked

Which prefixes belong to OOLTEWAH in area code 423?

3 blocks: 238, 679, 910. The table above gives the holder of each.

Which carriers have numbers in OOLTEWAH?

BRIGHTSPEED OF SOUTHERN TENNESSEE, LC (1 block), ONVOY, LLC - TN (1 block), COMCAST IP PHONE, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is OOLTEWAH 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