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
417-480 9 Ash Grove MO   522   2020-05-08   
417-576 A Springfield MO SPFDMOTLXRY  522      
417-576 9 Springfield MO   522      
417-760 A Billings MO   522   2025-10-06   
417-760 9 Billings MO   522   2025-10-06   
423-298 A Chattanooga TN CHTGTNMATMD  472      
423-298 9 Chattanooga TN   472      
423-594 A Dayton TN CHTGTNMAX9X  472      
423-594 9 Dayton TN   472   2009-11-19   
423-640 A Sneedville TN KNVLTNMAYGX  474      
423-640 9 Sneedville TN   474   2020-06-08   
423-781 A Etowah TN KNVLTNMA23Z  474      
423-781 9 Etowah TN   474   2004-05-01   
432-329 A Alpine TX   542   2025-10-17   
432-329 9 Alpine TX   542   2025-10-17   
434-402 A Concord VA   250   2025-09-22   
434-402 9 Concord VA   250   2025-09-22   
440-768 A Willoughby OH CLEVOH6214Z  320      
440-768 9 Willoughby OH   320   2022-02-25   
443-760 A Aberdeen MD BLTMMDCHXAX  236      
443-760 9 Aberdeen MD   236      
443-957 A Baltimore MD BLTMMDCHXAX  238      
443-957 2 Baltimore MD   238      
443-957 6 Baltimore MD   238      
447-320 A Oakford IL   374   2025-09-24   
447-320 9 Oakford IL   374   2025-09-24   
447-321 A Fairmount IL   370   2025-09-24   
447-321 9 Fairmount IL   370   2025-09-24   
447-323 A Milton IL   376   2025-09-25   
447-323 9 Milton IL   376   2025-09-25   
463-284 A Charlottesville IN IPLSIN01XZZ  336      
463-284 9 Charlottesville IN   336   2023-04-18   
469-458 4 Dallas TX   552   2013-06-03   
469-458 5 Dallas TX   552   2013-06-03   
469-647 7 Irving TX   552   2011-08-01   
470-242 2 Atlanta Northeast GA   438   2013-08-19   
472-223 A Rockingham NC LRBGNCATBMD  428      
472-223 9 Rockingham NC   428   2023-08-31   
475-394 A Ansonia-Derby CT   920   2025-09-25   
475-394 9 Ansonia-Derby CT   920   2025-09-25   
478-812 A Macon GA MACNGAGADS1  446      
478-812 9 Macon GA   446      
479-387 A Fayetteville AR FYVLARAT8MD  526      
479-387 3 Fayetteville AR   526      
479-387 9 Fayetteville AR   526      
479-434 A Fort Smith AR FYVLARATX1X  526      
479-434 9 Fort Smith AR   526      
479-657 A Bentonville AR FYVLARAT8MD  526      
479-657 4 Bentonville AR   526      
479-657 7 Bentonville AR   526      

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

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