Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Darlington, WI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
608-482 A MDSNWIPU2MD  6274 UNITED STATES CELLULAR - WI 354      
608-482 0   6274 UNITED STATES CELLULAR - WI 354      
608-482 1   6274 UNITED STATES CELLULAR - WI 354      
608-482 2   6274 UNITED STATES CELLULAR - WI 354      
608-482 3   6274 UNITED STATES CELLULAR - WI 354      
608-482 4   6274 UNITED STATES CELLULAR - WI 354      
608-482 5   6274 UNITED STATES CELLULAR - WI 354   2013-10-05   
608-482 6   6274 UNITED STATES CELLULAR - WI 354   2020-11-02   
608-482 7   508J CENTURYLINK COMMUNICATIONS, LLC 354   2014-12-05   
608-482 8   6529 T-MOBILE USA, INC. 354   2025-02-15   
608-726 A MDSNWI11XEY  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354      
608-726 0   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354      
608-726 1   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354      
608-726 2   6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354      
608-726 3   983F MCC TELEPHONY OF THE MIDWEST, LLC - WI 354   2019-09-01   
608-726 4   5489 LEVEL 3 COMMUNICATIONS, LLC - WI 354   2023-02-27   
608-726 5   792K CHARTER IP ENABLED SERVICES, LLC 354   2024-05-12   
608-726 6   7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 354   2015-09-11   
608-726 7   516J TON80 COMMUNICATIONS, LLC 354   2021-07-05   
608-726 8   5562 METROPCS, INC. 354   2026-01-30   
608-776 A DRTNWIXARS0  1159 BRIGHTSPEED OF CENTRAL WISCONSIN, LLC 354      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.