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
650-673 1 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-673 4 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-673 5 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-673 6 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-673 8 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-673 9 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-748 1 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-748 3 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-748 5 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-748 6 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-748 7 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-748 8 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-795 1 La Honda CA SNFCCA21XOZ  722   2016-06-09   
650-795 2 La Honda CA SNFCCA21XOZ  722   2016-06-09   
650-795 3 La Honda CA SNFCCA21XOZ  722   2016-06-09   
650-795 4 La Honda CA SNFCCA21XOZ  722   2016-06-09   
650-795 5 La Honda CA SNFCCA21XOZ  722   2016-06-09   
650-795 7 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-795 8 La Honda CA SNFCCA21XOZ  722   2016-08-18   
650-795 9 La Honda CA SNFCCA21XOZ  722   2016-08-18   
651-349 1 Wabasha MN MPLSMNCDX7X  628   2020-11-01   
651-349 2 Wabasha MN MPLSMNCDX7X  628   2020-11-01   
651-509 2 Twin Cities MN MPLSMNCDX7X  628   2023-12-01   
656-201 A Tampa North FL TAMPFLXAX3X  952      
656-201 1 Tampa North FL TAMPFLXAX3X  952   2022-02-25   
656-201 2 Tampa North FL TAMPFLXAX3X  952   2022-02-25   
656-202 A Zephyrhills FL TAMPFLXAX3X  952      
656-202 1 Zephyrhills FL TAMPFLXAX3X  952   2022-02-25   
656-202 2 Zephyrhills FL TAMPFLXAX3X  952   2022-02-25   
656-266 4 Tampa Central FL TAMPFLXAX3X  952   2026-03-16   
656-266 8 Tampa Central FL TAMPFLXAX3X  952   2026-03-16   
656-266 9 Tampa Central FL TAMPFLXAX3X  952   2026-03-16   
656-274 2 Tampa North FL TAMPFLXAX3X  952   2026-06-04   
656-274 3 Tampa North FL TAMPFLXAX3X  952   2026-06-04   
656-274 4 Tampa North FL TAMPFLXAX3X  952   2026-06-04   
656-274 7 Tampa North FL TAMPFLXAX3X  952   2026-06-04   
656-333 1 Tampa East FL TAMPFLXAX3X  952   2022-02-25   
657-281 3 Orange CA LSANCARCY1X  730   2016-08-27   
657-281 6 Orange CA LSANCARCY1X  730   2016-08-27   
657-284 8 Orange CA LSANCARCY1X  730   2016-06-04   
657-387 3 Yorba Linda CA LSANCARCY1X  730   2016-06-11   
657-387 4 Yorba Linda CA LSANCARCY1X  730   2016-06-11   
657-387 6 Yorba Linda CA LSANCARCY1X  730   2016-09-01   
657-390 2 Orange CA LSANCARCY1X  730   2016-06-04   
657-390 4 Orange CA LSANCARCY1X  730   2016-06-04   
657-390 7 Orange CA LSANCARCY1X  730   2016-06-04   
657-390 8 Orange CA LSANCARCY1X  730   2016-06-04   
657-783 2 Yorba Linda CA LSANCARCY1X  730   2026-05-15   
657-783 3 Yorba Linda CA LSANCARCY1X  730   2026-05-15   
657-783 4 Yorba Linda CA LSANCARCY1X  730   2026-05-15   

<< 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: Execulink Telecom

Like this site? We accept donations via PayPal.