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

RICHLD CTR prefixes in area code 608

NANPA records 7 assigned NXX blocks to rate center RICHLD CTR 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. 6 holders hold those blocks, the largest being FRONTIER NORTH INC. - WI (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI (1), TELEPORT COMMUNICATIONS AMERICA, LLC WI (1). The earliest assignment on record here is 2001-05-11 and the most recent 2025-01-23. 6 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
6 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
608-383 Frontier FRONTIER NORTH INC. - WI 2001-05-11 yes yes
608-475 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 2003-05-14 yes yes
608-570 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC WI 2019-08-01 yes yes
608-604 UNITED STATES CELLULAR - WI – yes yes
608-647 Frontier FRONTIER NORTH INC. - WI – yes yes
608-649 TECH COM, INC. - WI 2002-03-12 no yes
608-956 T-Mobile T-MOBILE USA, INC. 2025-01-23 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%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI Verizon 1 14.3%
TELEPORT COMMUNICATIONS AMERICA, LLC WI AT&T 1 14.3%
UNITED STATES CELLULAR - WI – 1 14.3%
TECH COM, INC. - WI – 1 14.3%
T-MOBILE USA, INC. T-Mobile 1 14.3%

Frequently asked

Which prefixes belong to RICHLD CTR in area code 608?

7 blocks: 383, 475, 570, 604, 647, 649, 956. The table above gives the holder of each.

Which carriers have numbers in RICHLD CTR?

FRONTIER NORTH INC. - WI (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC WI (1 block), UNITED STATES CELLULAR - WI (1 block), TECH COM, INC. - 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 RICHLD CTR 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