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.
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Switch: MDSNWI11XOY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
608-331 3 Platteville WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2025-04-21   
608-398 1 Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2022-10-03   
608-621 A Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354      
608-621 6 Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2022-03-04   
608-621 9 Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2021-02-09   
608-910 4 Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2024-05-03   
608-940 2 Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2024-08-04   
608-940 3 Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2024-08-04   
608-940 4 Madison WI 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 354   2024-08-04   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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