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: MILWWIHEWMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
262-261 A Port Washington WI 516C AT&T CORP. 356      
262-425 A Somers WI 516C AT&T CORP. 356      
262-577 A Kenosha WI 516C AT&T CORP. 356      
262-875 A Waukesha WI 516C AT&T CORP. 356      
414-215 A Milwaukee Zone 5 WI 516C AT&T CORP. 356      
414-252 A Milwaukee Zone 1 WI 516C AT&T CORP. 356      
920-631 A Beaver Dam WI 516C AT&T CORP. 356      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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