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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
929-428 8 New York City Zone 15 NY   132   2014-08-01   
929-920 2 New York City Zone 05 NY NYCMNY37UMD  132   2016-08-19   
929-920 3 New York City Zone 05 NY NYCMNY37UMD  132   2016-08-19   
930-275 A Bloomington IN BLTNINTMXXX  338      
930-275 8 Bloomington IN BLTNINTMXXX  338   2023-05-11   
930-275 9 Bloomington IN BLTNINTMXXX  338   2023-05-11   
930-276 A Terre Haute IN TRRHIN026MD  938      
930-276 8 Terre Haute IN TRRHIN026MD  938   2023-05-11   
930-276 9 Terre Haute IN TRRHIN026MD  938   2023-05-11   
937-518 A Dayton OH DYTNOHKT9MD  328      
937-518 8 Dayton OH DYTNOHKT9MD  328   2020-09-25   
937-518 9 Dayton OH DYTNOHKT9MD  328   2020-09-25   
938-262 5 Gadsden AL   476   2025-10-27   
938-274 4 Cullman AL   477   2025-10-30   
938-277 3 Decatur AL   477   2025-10-30   
938-278 1 Huntsville AL   477   2025-07-19   
938-278 2 Huntsville AL   477   2025-07-19   
938-278 3 Huntsville AL   477   2025-07-19   
938-282 3 Anniston AL   476   2025-10-27   
940-530 A Wichita Falls TX WCFLTXFGFMD  548      
940-530 8 Wichita Falls TX WCFLTXFGFMD  548   2023-05-11   
940-530 9 Wichita Falls TX WCFLTXFGFMD  548   2023-05-11   
941-200 7 North Port FL   952   2016-06-12   
941-200 8 North Port FL   952   2016-06-12   
941-200 9 North Port FL TAMPFLXAX3X  952   2016-06-12   
941-208 7 Englewood FL   952   2016-01-03   
941-221 3 Venice FL   952   2016-08-27   
941-221 4 Venice FL TAMPFLXAX3X  952   2016-08-27   
941-221 5 Venice FL TAMPFLXAX3X  952   2016-08-27   
941-221 6 Venice FL TAMPFLXAX3X  952   2016-08-27   
941-221 7 Venice FL TAMPFLXAX3X  952   2016-08-27   
941-221 8 Venice FL TAMPFLXAX3X  952   2016-08-27   
941-931 0 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 1 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 2 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 3 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 5 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 6 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 7 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 8 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-931 9 Sarasota FL TAMPFLXAX3X  952   2016-02-06   
941-940 0 Palmetto FL   952   2016-02-06   
941-940 1 Palmetto FL TAMPFLXAX3X  952   2016-02-06   
941-940 2 Palmetto FL   952   2016-02-06   
941-940 3 Palmetto FL TAMPFLXAX3X  952   2016-02-06   
941-940 4 Palmetto FL TAMPFLXAX3X  952   2016-02-06   
941-940 5 Palmetto FL TAMPFLXAX3X  952   2016-02-06   
941-940 6 Palmetto FL TAMPFLXAX3X  952   2016-02-06   
941-940 7 Palmetto FL TAMPFLXAX3X  952   2016-02-06   
941-940 8 Palmetto FL TAMPFLXAX3X  952   2016-02-06   

<< 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 >>

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.