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
712-389 9 Sioux City IA SXCYIAAT2MD  630      
712-491 A Alta IA   630   2025-11-07   
713-577 A Houston TX HSTNTX01DS2  560      
713-577 0 Houston TX HSTNTX01DS2  560      
713-577 1 Houston TX HSTNTX01DS2  560      
713-577 2 Houston TX HSTNTX01DS2  560      
713-577 3 Houston TX HSTNTX01DS2  560      
713-577 4 Houston TX HSTNTX01DS2  560      
713-577 5 Houston TX HSTNTX01DS2  560      
713-577 6 Houston TX HSTNTX01DS2  560      
713-577 7 Houston TX HSTNTX01DS2  560      
713-577 8 Houston TX HSTNTX01DS2  560      
715-844 A Waupaca WI GNBYWIATX0X  350   2024-02-26   
715-844 9 Waupaca WI GNBYWIATX0X  350   2024-02-26   
715-936 A Ellsworth WI EUCLWIATPMD  352   2024-02-27   
715-936 9 Ellsworth WI EUCLWIATPMD  352   2024-02-27   
716-319 A Buffalo NY BFLONYFRBMD  140      
716-319 1 Buffalo NY BFLONYFRBMD  140      
716-319 3 Buffalo NY BFLONYFRBMD  140      
716-319 9 Buffalo NY BFLONYFRBMD  140      
716-442 A Akron NY BFLONYFRBMD  140      
716-442 4 Akron NY BFLONYFRBMD  140   2003-11-21   
716-650 A Williamsville NY BFLONYFRBMD  140      
716-650 6 Williamsville NY BFLONYFRBMD  140      
716-650 9 Williamsville NY BFLONYFRBMD  140      
716-670 A Derby NY BFLONYFRBMD  140      
716-670 9 Derby NY BFLONYFRBMD  140   2012-09-19   
716-790 A Olean NY BFLONYFRBMD  140      
716-790 7 Olean NY BFLONYFRBMD  140      
717-433 A Harrisburg City Zone-1 PA HRBGPAHAX3Y  226      
717-433 9 Harrisburg City Zone-1 PA HRBGPAHAX3Y  226      
719-235 A Colorado Springs-Main CO CLSPCOMADS5  658      
719-235 4 Colorado Springs-Main CO CLSPCOMADS5  658      
719-235 9 Colorado Springs-Main CO CLSPCOMADS5  658      
719-692 A Cripple Creek CO CLSPCOMAXFZ  658      
719-692 9 Cripple Creek CO CLSPCOMAXFZ  658   2022-11-14   
719-799 A Colorado Springs-Main CO CLSPCOMADS5  658      
719-799 1 Colorado Springs-Main CO CLSPCOMADS5  658      
719-799 2 Colorado Springs-Main CO CLSPCOMADS5  658      
719-799 4 Colorado Springs-Main CO CLSPCOMADS5  658      
720-307 A Allens Park-Lyons CO DNVRCOMAXYZ  656      
720-307 9 Allens Park-Lyons CO DNVRCOMAXYZ  656   2012-09-27   
720-342 0 Denver CO   656   2009-06-06   
720-342 1 Denver CO   656   2009-06-06   
720-342 2 Denver CO   656   2009-06-06   
720-342 3 Denver CO   656   2009-06-06   
720-342 4 Denver CO   656   2009-06-06   
720-342 5 Denver CO   656   2009-06-06   
720-342 6 Denver CO   656   2009-06-06   
720-342 7 Denver CO   656   2009-06-06   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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