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.

Switch: MILWWI22RS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
414-229 A Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 0 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 1 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 2 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 3 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 4 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 5 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 6 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      
414-229 7 Milwaukee Zone 1 WI 9327 AMERITECH WISCONSIN 356      

Last updated: Tue, 04 May 2021 15:04:27 UTC

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