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: 631

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
920-631 A Beaver Dam WI MILWWIHEWMD  516C AT&T CORP. 356      
920-631 0 Beaver Dam WI MILWWIAUX7Y  939H COMMIO, LLC 356      
920-631 1 Beaver Dam WI MILWWI12XWX  007F BANDWIDTH.COM CLEC, LLC - WI 356      
920-631 2 Beaver Dam WI MILWWIAUDS2  227F PEERLESS NETWORK OF WISCONSIN, LLC - WI 356      
920-631 3 Beaver Dam WI MILWWI12XTX  624H ONVOY SPECTRUM, LLC 356      
920-631 4 Beaver Dam WI MILWWI12XWX  007F BANDWIDTH.COM CLEC, LLC - WI 356      
920-631 5 Beaver Dam WI MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-631 7 Beaver Dam WI MILWWIHEWMD  516C AT&T CORP. 356      
920-631 8 Beaver Dam WI MILWWIAUDS1  225C ONVOY, LLC - WI 356      
920-631 9 Beaver Dam WI 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.