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: 740

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
608-740 A Madison WI MDSOWILM2MD  8283 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - WI 354      
608-740 0 Madison WI MDSNWI11XQX  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 354   2022-10-14   
608-740 1 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2022-12-16   
608-740 2 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2022-08-21   
608-740 3 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2022-08-21   
608-740 4 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2022-08-21   
608-740 5 Madison WI   225C ONVOY, LLC - WI 354   2024-02-19   
608-740 6 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2022-08-21   
608-740 7 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2022-08-21   
608-740 8 Madison WI MDSNWI11XAX  225C ONVOY, LLC - WI 354   2022-08-21   
608-740 9 Madison WI MDSOWILM2MD  8283 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - WI 354   2022-04-29   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.