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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NPA: 507 [Rate centres in NPA 507] [Dial plan for NPA 507]

NXX: 657

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-657 A Ostrander MN OSTRMNXORS0  1345 ACE TEL. ASSN. - MN 620      
507-657 0 Ostrander MN OSTRMNXORS0  1345 ACE TEL. ASSN. - MN 620      
507-657 1 Ostrander MN OSTRMNXORS0  1345 ACE TEL. ASSN. - MN 620      
507-657 2 Ostrander MN OSTRMNXORS0  1345 ACE TEL. ASSN. - MN 620      
507-657 7 Ostrander MN OSTRMNXORS0  1345 ACE TEL. ASSN. - MN 620      
507-657 8 Ostrander MN OSTRMNXORS0  1345 ACE TEL. ASSN. - MN 620      
507-657 9 Ostrander MN OSTRMNXORS0  1345 ACE TEL. ASSN. - MN 620      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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