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

TANNERWLMS prefixes in area code 228

NANPA records 6 assigned NXX blocks to rate center TANNERWLMS in area code 228, 2.2% of the 275 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 ONVOY, LLC - MS (3), ONVOY SPECTRUM, LLC (2), BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (1). The earliest assignment on record here is 2017-04-21 and the most recent 2023-09-11. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

6 assigned blocks – 2.2% of 228
3 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
228-212 Charter ONVOY SPECTRUM, LLC 2022-09-30 yes yes
228-291 Onvoy ONVOY, LLC - MS 2023-09-11 yes yes
228-335 Onvoy ONVOY, LLC - MS 2018-03-01 yes yes
228-600 Charter ONVOY SPECTRUM, LLC 2021-10-13 yes yes
228-641 AT&T BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL – yes yes
228-900 Onvoy ONVOY, LLC - MS 2017-04-21 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 - MS Onvoy 3 50%
ONVOY SPECTRUM, LLC Charter 2 33.3%
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL AT&T 1 16.7%

Frequently asked

Which prefixes belong to TANNERWLMS in area code 228?

6 blocks: 212, 291, 335, 600, 641, 900. The table above gives the holder of each.

Which carriers have numbers in TANNERWLMS?

ONVOY, LLC - MS (3 blocks), ONVOY SPECTRUM, LLC (2 blocks), BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is TANNERWLMS 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 228

All 275 prefixes in 228