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.

Theresa, WI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
920-276 A THRSWIXARS4  0886 FRONTIER NORTH INC. - WI 356      
920-276 0 THRSWIXARS4  0886 FRONTIER NORTH INC. - WI 356      
920-276 1 MILWWIDK6MD  5489 LEVEL 3 COMMUNICATIONS, LLC - WI 356      
920-276 2 FDULWIGN0MD  3839 CHARTER FIBERLINK, LLC - WI 356      
920-276 3 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-276 4 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-276 5 PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356      
920-276 6 MILWWIHEVMD  7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 356      
920-276 7 MILWWI45XBX  508J CENTURYLINK COMMUNICATIONS, LLC 356      
920-276 8 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-276 9 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-353 A MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-353 2 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-488 A THRSWIXARS4  0886 FRONTIER NORTH INC. - WI 356      
920-488 0 PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356      
920-488 1 PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356      
920-488 2 THRSWIXARS4  0886 FRONTIER NORTH INC. - WI 356      
920-488 3 THRSWIXARS4  0886 FRONTIER NORTH INC. - WI 356      
920-488 4 THRSWIXARS4  0886 FRONTIER NORTH INC. - WI 356      
920-488 5 MILWWIAU11Z  490J DISH WIRELESS, LLC 356      
920-488 6 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-488 8 MILWWIAUXZZ  965H FRACTEL, LLC 356      
920-488 9 MILWWIAUDS1  225C ONVOY, LLC - WI 356      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.