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.

OCN: 321J HD CARRIER LLC

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
818-214 4 Reseda CA LSANCARCY1X  730   2016-06-11   
818-214 5 Reseda CA LSANCARCY1X  730   2016-08-27   
818-214 6 Reseda CA LSANCARCY1X  730   2016-08-27   
820-280 A Los Alamos CA SNBBCAXFXHY  740      
820-280 9 Los Alamos CA SNBBCAXFXHY  740   2019-11-23   
821-207 6 Greenville SC GNVLSCMCX3X  430   2025-08-11   
821-207 7 Greenville SC GNVLSCMCX3X  430   2025-08-11   
821-216 4 Spartanburg SC GNVLSCMCX3X  430   2026-02-14   
821-216 5 Spartanburg SC GNVLSCMCX3X  430   2026-02-14   
821-216 6 Spartanburg SC GNVLSCMCX3X  430   2026-02-14   
826-217 A Harrisonburg VA HRBGVABFSMD  927      
826-217 8 Harrisonburg VA HRBGVABFSMD  927   2023-05-11   
826-217 9 Harrisonburg VA HRBGVABFSMD  927   2023-05-11   
826-270 2 Roanoke VA RONKVAGE0MD  244   2026-01-18   
826-270 3 Roanoke VA RONKVAGE0MD  244   2026-01-18   
826-270 4 Roanoke VA RONKVAGE0MD  244   2026-01-18   
828-939 A Asheville NC AHVLNCOH28Z  420   2026-01-22   
828-939 6 Asheville NC AHVLNCOH28Z  420   2026-01-22   
828-939 7 Asheville NC AHVLNCOH28Z  420   2026-01-22   
828-939 8 Asheville NC AHVLNCOH28Z  420   2026-01-22   
828-939 9 Asheville NC AHVLNCOH28Z  420   2026-01-22   
830-259 A Floresville TX SNANTXCA91Z  566      
830-259 8 Floresville TX SNANTXCA91Z  566   2022-09-05   
830-259 9 Floresville TX SNANTXCA91Z  566   2022-09-05   
831-215 A Monterey CA MTRYCAPM8MD  736      
831-215 8 Monterey CA MTRYCAPM8MD  736   2020-11-23   
831-215 9 Monterey CA MTRYCAPM8MD  736   2020-11-23   
831-322 6 Watsonville CA SNFCCA21XOZ  722   2016-10-22   
831-777 0 Santa Cruz CA SNFCCA21XOZ  722   2016-06-28   
831-777 1 Santa Cruz CA SNFCCA21XOZ  722   2016-06-28   
831-859 A Salinas CA MTRYCAPM9MD  736   2024-08-23   
831-859 8 Salinas CA MTRYCAPM9MD  736   2024-08-23   
831-859 9 Salinas CA MTRYCAPM9MD  736   2024-08-23   
831-881 6 Monterey CA MTRYCAPM8MD  736   2026-06-19   
831-881 7 Monterey CA MTRYCAPM8MD  736   2026-06-19   
831-881 8 Monterey CA MTRYCAPM8MD  736   2026-06-19   
831-999 4 Santa Cruz CA SNFCCA21XOZ  722   2016-06-13   
831-999 5 Santa Cruz CA SNFCCA21XOZ  722   2016-06-17   
831-999 6 Santa Cruz CA SNFCCA21XOZ  722   2016-06-13   
832-408 3 Houston TX HSTNTXJAXCY  560   2025-07-19   
835-835 1 Reading PA   228   2026-09-17   
835-835 2 Reading PA   228   2026-09-17   
835-835 3 Reading PA   228   2026-09-17   
838-227 A Central Bridge NY ALBYNYSSXEZ  134      
838-227 8 Central Bridge NY ALBYNYSSXEZ  134   2021-01-03   
838-227 9 Central Bridge NY ALBYNYSSXEZ  134   2021-01-03   
838-281 8 Troy NY ALBYNYSSXZY  134   2026-01-18   
838-839 A Albany NY ALBYNYSSXZY  134      
838-839 9 Albany NY ALBYNYSSXZY  134   2019-03-09   
839-201 A Columbia SC CLMASCTLX5Y  434      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 >>

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.