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.

NPA: 608 [Rate centres in NPA 608] [Dial plan for NPA 608]

NXX: 640

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
608-640 A Madison WI MDSNWIPU2MD  6274 UNITED STATES CELLULAR - WI 354      
608-640 0 Madison WI MDSNWIPU2MD  6274 UNITED STATES CELLULAR - WI 354   2016-09-29   
608-640 1 Madison WI MDSNWI11XNX  6529 T-MOBILE USA, INC. 354   2016-10-13   
608-640 2 Madison WI MDSNWI11XNX  6529 T-MOBILE USA, INC. 354   2016-10-13   
608-640 3 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2018-05-18   
608-640 4 Madison WI FTBGWIDKGT0  3839 CHARTER FIBERLINK, LLC - WI 354   2018-04-01   
608-640 5 Madison WI FTBGWIDKGT0  3839 CHARTER FIBERLINK, LLC - WI 354   2018-09-23   
608-640 6 Madison WI MDSNWI11XEY  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354   2017-07-22   
608-640 7 Madison WI MDSNWI11XEY  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354   2016-10-14   
608-640 8 Madison WI MDSNWI11XEY  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354   2016-10-14   
608-640 9 Madison WI MDSNWI11XEY  6508 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 354   2017-06-29   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.