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

MUKWONAGO prefixes in area code 262

NANPA records 3 assigned NXX blocks to rate center MUKWONAGO in area code 262, 0.5% of the 634 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 WESTERN WISCONSIN, LLC (1), TELEPORT COMMUNICATIONS AMERICA, LLC WI (1), NEW CINGULAR WIRELESS PCS, LLC - IL (1). The earliest assignment on record here is 2001-10-22 and the most recent 2001-10-22. 2 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.5% of 262
3 holders of record
2 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
262-363 Brightspeed BRIGHTSPEED OF WESTERN WISCONSIN, LLC – no yes
262-368 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC WI – yes yes
262-378 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2001-10-22 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 WESTERN WISCONSIN, LLC Brightspeed 1 33.3%
TELEPORT COMMUNICATIONS AMERICA, LLC WI AT&T 1 33.3%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 1 33.3%

Frequently asked

Which prefixes belong to MUKWONAGO in area code 262?

3 blocks: 363, 368, 378. The table above gives the holder of each.

Which carriers have numbers in MUKWONAGO?

BRIGHTSPEED OF WESTERN WISCONSIN, LLC (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC WI (1 block), NEW CINGULAR WIRELESS PCS, LLC - IL (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is MUKWONAGO 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 262

All 634 prefixes in 262