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

WISCONDLLS prefixes in area code 608

NANPA records 7 assigned NXX blocks to rate center WISCONDLLS in area code 608, 0.9% 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. 5 holders hold those blocks, the largest being FRONTIER NORTH INC. - WI (2), NEW CINGULAR WIRELESS PCS, LLC - IL (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI (1). The earliest assignment on record here is 2002-01-29 and the most recent 2024-02-21. 7 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

7 assigned blocks – 0.9% of 608
5 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
608-253 Frontier FRONTIER NORTH INC. - WI – yes yes
608-254 Frontier FRONTIER NORTH INC. - WI – yes yes
608-404 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 2003-01-15 yes yes
608-432 UNITED STATES CELLULAR - WI – yes yes
608-678 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
608-844 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2002-01-29 yes yes
608-917 T-Mobile T-MOBILE USA, INC. 2024-02-21 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
FRONTIER NORTH INC. - WI Frontier 2 28.6%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 28.6%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI Verizon 1 14.3%
UNITED STATES CELLULAR - WI – 1 14.3%
T-MOBILE USA, INC. T-Mobile 1 14.3%

Frequently asked

Which prefixes belong to WISCONDLLS in area code 608?

7 blocks: 253, 254, 404, 432, 678, 844, 917. The table above gives the holder of each.

Which carriers have numbers in WISCONDLLS?

FRONTIER NORTH INC. - WI (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI (1 block), UNITED STATES CELLULAR - WI (1 block), T-MOBILE USA, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WISCONDLLS 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