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.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
414-935 6 Milwaukee Zone 1 WI MILWWI12XBY  356   2007-12-16   
414-982 2 Milwaukee Zone 1 WI MILWWI12XBY  356   2010-11-27   
414-982 6 Milwaukee Zone 1 WI MILWWI12XBY  356   2011-01-23   
414-988 1 Milwaukee Zone 1 WI MILWWI12XBY  356   2012-08-31   
414-988 7 Milwaukee Zone 1 WI MILWWI12XBY  356   2011-03-18   
509-437 7 Spokane WA SPKQWAYQ1MD  676   2026-06-11   
509-514 A Spokane WA SPKQWAYQ1MD  676      
509-514 2 Spokane WA SPKQWAYQ1MD  676   2022-01-10   
575-349 A Socorro NM SCRRNMCU0MD  664   2026-01-11   
575-349 3 Socorro NM SCRRNMCU0MD  664   2026-01-11   
603-414 A Sunapee NH   122      
603-414 2 Sunapee NH   122   2016-08-09   
608-203 A Middleton WI MDSNWIGJ5MD  354      
608-203 0 Middleton WI MDSNWIGJ5MD  354      
608-203 1 Middleton WI MDSNWIGJ5MD  354      
608-203 2 Middleton WI MDSNWIGJ5MD  354      
608-203 3 Middleton WI MDSNWIGJ5MD  354      
608-203 4 Middleton WI MDSNWIGJ5MD  354      
608-204 A Madison WI MDSNWIGJ5MD  354      
608-205 A Stoughton WI MDSNWIGJ5MD  354      
608-205 0 Stoughton WI MDSNWIGJ5MD  354      
608-205 1 Stoughton WI MDSNWIGJ5MD  354      
608-205 3 Stoughton WI MDSNWIGJ5MD  354      
608-205 9 Stoughton WI MDSNWIGJ5MD  354      
608-210 A Madison WI MDSNWIGJ5MD  354      
608-210 0 Madison WI MDSNWIGJ5MD  354      
608-210 1 Madison WI MDSNWIGJ5MD  354      
608-210 2 Madison WI MDSNWIGJ5MD  354      
608-210 3 Madison WI MDSNWIGJ5MD  354      
608-210 4 Madison WI MDSNWIGJ5MD  354      
608-210 5 Madison WI MDSNWIGJ5MD  354      
608-210 6 Madison WI MDSNWIGJ5MD  354      
608-210 7 Madison WI MDSNWIGJ5MD  354      
608-210 8 Madison WI MDSNWIGJ5MD  354      
608-216 7 Madison WI MDSNWIGJ5MD  354   2006-03-09   
608-216 9 Madison WI MDSNWIGJ5MD  354   2006-03-09   
608-230 A Madison WI MDSNWIGJ5MD  354      
608-230 1 Madison WI MDSNWIGJ5MD  354      
608-230 2 Madison WI MDSNWIGJ5MD  354      
608-230 3 Madison WI MDSNWIGJ5MD  354      
608-230 4 Madison WI MDSNWIGJ5MD  354      
608-230 7 Madison WI MDSNWIGJ5MD  354      
608-230 8 Madison WI MDSNWIGJ5MD  354      
608-230 9 Madison WI MDSNWIGJ5MD  354      
608-291 1 Oregon WI MDSNWIGJ4MD  354   2005-10-08   
608-308 A Madison WI MDSNWIGJ4MD  354      
608-310 A Madison WI MDSNWIGJ5MD  354      
608-310 0 Madison WI MDSNWIGJ5MD  354      
608-310 1 Madison WI MDSNWIGJ5MD  354      
608-310 2 Madison WI MDSNWIGJ5MD  354      

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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