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
475-368 6 Darien CT   920   2025-05-02   
475-368 7 Darien CT   920   2025-04-14   
475-368 8 Darien CT   920   2024-07-25   
475-368 9 Darien CT   920   2025-05-02   
475-850 2 Norwalk CT   920   2023-08-20   
475-850 3 Norwalk CT   920   2023-10-20   
475-889 4 Norwalk CT   920   2020-04-23   
475-889 5 Norwalk CT   920   2020-04-23   
478-303 A Macon GA MACNGAMTY0X  446      
478-303 2 Macon GA   446   2020-09-17   
479-324 0 Russellville AR   528   2019-06-13   
479-324 7 Russellville AR   528   2019-06-13   
479-324 8 Russellville AR   528   2019-07-15   
479-388 A Fort Smith AR FTSMARSUY0X  526      
479-388 2 Fort Smith AR   526   2020-08-03   
480-597 A Phoenix AZ PHNXAZMAY0X  666      
480-597 0 Phoenix AZ   666   2019-08-21   
480-597 2 Phoenix AZ   666   2019-08-21   
484-837 9 Easton PA   228   2021-10-30   
501-356 A Jessieville AR JNBOARMAX0X  528      
501-356 0 Jessieville AR   528   2019-06-27   
501-356 2 Jessieville AR   528   2019-05-12   
502-677 A Louisville KY LSVLKYAPY0X  462      
502-677 2 Louisville KY   462   2020-08-03   
504-386 A New Orleans LA NWORLAMAYDX  490      
504-386 2 New Orleans LA   490   2020-08-03   
505-403 A Albuquerque NM ALBQNMMAY1X  664      
505-403 0 Albuquerque NM   664   2019-08-29   
505-403 2 Albuquerque NM   664   2019-08-29   
507-718 A Rochester MN ROCHMNROY0X  620      
507-718 2 Rochester MN   620   2020-09-21   
509-508 A Spokane WA SPKNWA01Y0X  676      
509-508 2 Spokane WA   676   2020-09-21   
512-884 A Austin TX AUSTTXHOY0X  558      
512-884 0 Austin TX   558   2019-07-04   
512-884 2 Austin TX   558   2019-05-16   
512-884 4 Austin TX   558   2019-07-04   
513-694 A Cincinnati OH CNCNOHWSY0X  922      
513-694 2 Cincinnati OH   922   2020-10-06   
515-513 A Des Moines IA DESMIADTY0X  632      
515-513 2 Des Moines IA   632   2020-09-03   
516-709 A Nassau Zone 4 NY WHPLNYGRX0X  132      
516-709 0 Nassau Zone 4 NY   132   2019-06-08   
516-709 1 Nassau Zone 4 NY   132   2019-06-28   
516-709 2 Nassau Zone 4 NY   132   2019-05-02   
516-709 4 Nassau Zone 4 NY   132   2019-07-15   
516-709 5 Nassau Zone 4 NY   132   2019-07-15   
516-709 6 Nassau Zone 4 NY   132   2019-08-15   
516-709 7 Nassau Zone 4 NY   132   2019-08-15   
516-709 8 Nassau Zone 4 NY   132   2019-07-08   

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

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