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.

Oakfield, WI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
920-583 A OKFDWIXADS0  0886 FRONTIER NORTH INC. - WI 356      
920-583 0 MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-583 1 OKFDWIXADS0  0886 FRONTIER NORTH INC. - WI 356      
920-583 2 OKFDWIXADS0  0886 FRONTIER NORTH INC. - WI 356      
920-583 3 OKFDWIXADS0  0886 FRONTIER NORTH INC. - WI 356      
920-583 4 OKFDWIXADS0  0886 FRONTIER NORTH INC. - WI 356      
920-583 5 MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-583 6 MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-583 7 FDULWIGN0MD  3839 CHARTER FIBERLINK, LLC - WI 356      
920-583 8 MILWWI45XBX  508J CENTURYLINK COMMUNICATIONS, LLC 356      
920-583 9 MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-937 A MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-937 0 MILWWI12ZMD  6274 UNITED STATES CELLULAR - WI 356      
920-937 2 PLMOWIXAEMD  624H ONVOY SPECTRUM, LLC 356      
920-937 3 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-937 4 MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-937 6 MILWWIAU03Z  516J TON80 COMMUNICATIONS, LLC 356      
920-937 7 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.