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

MADISON prefixes in area code 812

NANPA records 10 assigned NXX blocks to rate center MADISON in area code 812, 1.3% of the 785 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. 7 holders hold those blocks, the largest being FRONTIER NORTH, INC. - IN (2), NEW CINGULAR WIRELESS PCS, LLC - IL (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN (2). The earliest assignment on record here is 2002-02-27 and the most recent 2018-12-31. 5 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 203, 207, 256, 304 – overlay codes cover the same geography, so a rate center is served by all of them.

10 assigned blocks – 1.3% of 812
7 holders of record
5 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
812-265 Frontier FRONTIER NORTH, INC. - IN – no yes
812-273 Frontier FRONTIER NORTH, INC. - IN – no yes
812-274 Lumen CENTURYLINK COMMUNICATIONS, LLC – yes yes
812-292 T-Mobile POWERTEL KENTUCKY LICENSES, INC. 2002-06-11 yes yes
812-493 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
812-574 SEI DATA, INC. - IN – no yes
812-599 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 2002-02-27 no yes
812-701 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2002-05-23 no yes
812-801 Lumen LEVEL 3 COMMUNICATIONS, LLC - IN 2002-08-20 yes yes
812-818 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 2018-12-31 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
FRONTIER NORTH, INC. - IN Frontier 2 20%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 20%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN Verizon 2 20%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 10%
POWERTEL KENTUCKY LICENSES, INC. T-Mobile 1 10%
SEI DATA, INC. - IN – 1 10%
LEVEL 3 COMMUNICATIONS, LLC - IN Lumen 1 10%

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 MADISON in area code 812?

10 blocks: 265, 273, 274, 292, 493, 574, 599, 701, 801, 818. The table above gives the holder of each.

Which carriers have numbers in MADISON?

FRONTIER NORTH, INC. - IN (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN (2 blocks), CENTURYLINK COMMUNICATIONS, LLC (1 block), POWERTEL KENTUCKY LICENSES, INC. (1 block), SEI DATA, INC. - IN (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MADISON 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 812

All 785 prefixes in 812