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

TOMAH prefixes in area code 608

NANPA records 10 assigned NXX blocks to rate center TOMAH in area code 608, 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. 6 holders hold those blocks, the largest being UNITED STATES CELLULAR - WI (2), BRIGHTSPEED OF WESTERN WISCONSIN, LLC (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI (2). The earliest assignment on record here is 2001-11-02 and the most recent 2024-03-19. 8 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

10 assigned blocks – 1.3% of 608
6 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
608-315 T-Mobile METROPCS, INC. – yes yes
608-343 UNITED STATES CELLULAR - WI – yes yes
608-344 UNITED STATES CELLULAR - WI – yes yes
608-372 Brightspeed BRIGHTSPEED OF WESTERN WISCONSIN, LLC – no yes
608-374 Brightspeed BRIGHTSPEED OF WESTERN WISCONSIN, LLC – no yes
608-377 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI – yes yes
608-387 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 2003-06-11 yes yes
608-567 T-Mobile T-MOBILE USA, INC. 2001-11-02 yes yes
608-706 T-Mobile T-MOBILE USA, INC. 2021-06-28 yes yes
608-928 Onvoy ONVOY, LLC - WI 2024-03-19 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
UNITED STATES CELLULAR - WI – 2 20%
BRIGHTSPEED OF WESTERN WISCONSIN, LLC Brightspeed 2 20%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI Verizon 2 20%
T-MOBILE USA, INC. T-Mobile 2 20%
METROPCS, INC. T-Mobile 1 10%
ONVOY, LLC - WI Onvoy 1 10%

Frequently asked

Which prefixes belong to TOMAH in area code 608?

10 blocks: 315, 343, 344, 372, 374, 377, 387, 567, 706, 928. The table above gives the holder of each.

Which carriers have numbers in TOMAH?

UNITED STATES CELLULAR - WI (2 blocks), BRIGHTSPEED OF WESTERN WISCONSIN, LLC (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI (2 blocks), T-MOBILE USA, INC. (2 blocks), METROPCS, INC. (1 block), ONVOY, LLC - WI (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is TOMAH 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 608

All 785 prefixes in 608