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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OCN: 321J HD CARRIER LLC

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
978-982 7 Peabody MA CMBRMABEQMD  128   2016-04-11   
978-982 8 Peabody MA CMBRMABEQMD  128   2016-04-11   
978-990 1 Leominster MA CMBRMABEQMD  128   2016-04-16   
978-990 4 Leominster MA CMBRMABEQMD  128   2016-04-16   
978-990 5 Leominster MA CMBRMABEQMD  128   2016-04-16   
980-517 3 Charlotte NC   422   2025-10-19   
980-517 4 Charlotte NC   422   2025-10-19   
980-517 8 Charlotte NC   422   2025-10-19   
980-531 4 Charlotte NC   422   2025-09-07   
980-531 5 Charlotte NC   422   2025-09-07   
980-560 A Charlotte NC   422   2025-10-05   
980-560 0 Charlotte NC   422   2025-10-05   
980-880 A Charlotte NC CHRONC82DMD  422      
980-880 8 Charlotte NC CHRONC82DMD  422   2020-07-25   
980-880 9 Charlotte NC CHRONC82DMD  422   2020-07-25   
983-226 4 Longmont CO   656   2025-11-27   
983-226 5 Longmont CO   656   2025-11-27   
983-226 6 Longmont CO   656   2025-11-27   
983-777 8 Denver CO DNVRCOMA32Z  656   2023-12-04   
983-888 1 Denver CO DNVRCOMA32Z  656   2023-08-05   
983-999 1 Denver CO DNVRCOMA32Z  656   2023-10-08   
983-999 3 Denver CO DNVRCOMA32Z  656   2023-10-08   
984-404 A Raleigh NC   426   2025-10-05   
984-404 4 Raleigh NC   426   2025-10-05   
984-404 5 Raleigh NC   426   2025-10-05   
984-404 6 Raleigh NC   426   2025-10-05   
984-404 7 Raleigh NC   426   2025-10-05   
984-884 A Raleigh NC RLGHNCHD8MD  426      
984-884 8 Raleigh NC RLGHNCHD8MD  426   2020-08-03   
984-884 9 Raleigh NC RLGHNCHD8MD  426   2020-08-03   
986-201 2 Caldwell ID BOISIDPZAMD  652   2020-09-26   
986-219 A Idaho Falls ID BOISIDPZBMD  652      
986-219 8 Idaho Falls ID BOISIDPZBMD  652   2022-02-11   
986-219 9 Idaho Falls ID BOISIDPZBMD  652   2022-02-11   
986-276 6 Caldwell ID   652   2025-12-04   
986-290 2 Boise ID   652   2025-12-04   
986-299 A Coeur D'Alene ID   960   2025-08-16   
986-299 7 Coeur D'Alene ID   960   2025-08-16   
986-299 8 Coeur D'Alene ID   960   2025-08-16   
986-299 9 Coeur D'Alene ID   960   2025-08-16   
986-800 7 Idaho Falls ID BOISIDPZAMD  652   2020-12-05   
986-996 4 Boise ID   652   2025-12-04   
986-996 9 Boise ID   652   2025-12-04   
989-357 A Bay City MI SGNWMIACFMD  344      
989-357 9 Bay City MI SGNWMIACFMD  344   2020-11-21   
989-899 4 Saginaw MI   344   2026-02-14   
989-899 5 Saginaw MI   344   2026-02-14   
989-899 6 Saginaw MI   344   2026-02-14   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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