Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 7421 AT&T - LOCAL

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
631-404 4 Brentwood NY   132      
631-812 6 Huntington NY   132   2009-04-24   
631-881 A Central Islip NY BRWDNYBW6KD  132      
631-881 6 Central Islip NY   132      
631-923 A Huntington NY BRWDNYBW6KD  132      
631-923 9 Huntington NY   132      
631-927 A Farmingdale NY GRCYNYGC6KD  132      
631-927 1 Farmingdale NY   132      
631-927 3 Farmingdale NY   132      
631-927 5 Farmingdale NY   132      
631-927 6 Farmingdale NY   132      
631-927 8 Farmingdale NY   132      
631-927 9 Farmingdale NY   132      
631-954 A Bay Shore NY NYCMNYBWDS7  132      
636-263 A Harvester MCA4 MO STLSMO09DS1  520      
636-263 2 Harvester MCA4 MO   520      
636-473 A Antonia MO   520   2025-09-19   
636-473 9 Antonia MO   520   2025-09-19   
636-628 4 Manchester MO   520   2003-01-09   
650-260 A Redwood City CA SNFCCA01DS5  722      
650-260 9 Redwood City CA   722      
650-264 A San Carlos-Belmont CA SNFCCA01DS5  722      
650-264 1 San Carlos-Belmont CA   722      
650-265 A Mountain View CA SNFCCA01DS5  722      
650-265 3 Mountain View CA   722      
650-265 5 Mountain View CA   722      
650-386 7 Mountain View CA   722   2012-06-08   
650-449 5 San Francisco: Juniper DA CA   722   2002-07-22   
650-452 A South San Francisco CA SNFCCA01DS5  722      
650-452 1 South San Francisco CA   722      
650-690 A Palo Alto CA SNFCCA01DS5  722      
650-690 9 Palo Alto CA   722      
650-918 A San Mateo CA SNFCCA01DS5  722      
650-918 3 San Mateo CA   722      
651-367 A Twin Cities MN GLVYMNORVMD  628      
651-367 0 Twin Cities MN   628      
651-367 1 Twin Cities MN   628      
651-367 2 Twin Cities MN   628      
651-367 3 Twin Cities MN   628      
651-367 5 Twin Cities MN   628      
651-367 6 Twin Cities MN   628      
651-367 7 Twin Cities MN   628      
651-367 8 Twin Cities MN   628      
651-397 A North Branch MN GLVYMNORVMD  628      
651-397 9 North Branch MN   628   2023-08-05   
661-341 A Lancaster CA SHOKCA024MD  730      
661-341 9 Lancaster CA   730      
661-678 A Santa Clarita: Newhall-Castaic DA CA SHOKCA02DS2  730      
661-678 2 Santa Clarita: Newhall-Castaic DA CA   730      
661-678 4 Santa Clarita: Newhall-Castaic DA CA   730      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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