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: 920 [Rate centres in NPA 920] [Dial plan for NPA 920]

NXX: 520

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-520 A Fox Lake WI FDULWIGN0MD  3839 CHARTER FIBERLINK, LLC - WI 356      
920-520 0 Fox Lake WI FDULWIGN0MD  3839 CHARTER FIBERLINK, LLC - WI 356      
920-520 2 Fox Lake WI MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-520 4 Fox Lake WI MILWWI12XTX  624H ONVOY SPECTRUM, LLC 356      
920-520 5 Fox Lake WI MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-520 6 Fox Lake WI MILWWIHEVMD  7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI 356      
920-520 7 Fox Lake WI MILWWIDK6MD  5489 LEVEL 3 COMMUNICATIONS, 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.