Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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
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   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   952   2026-03-16   
656-266 8 Tampa Central FL   952   2026-03-16   
656-266 9 Tampa Central FL   952   2026-03-16   
656-333 1 Tampa East FL TAMPFLXAX3X  952   2022-02-25   
657-281 3 Orange CA   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   
659-304 4 Bessemer AL   476   2025-10-27   
659-559 A Birmingham AL   476   2025-08-16   
659-559 7 Birmingham AL   476   2025-08-16   
659-559 8 Birmingham AL   476   2025-08-16   
659-595 A Tuscaloosa AL   476   2025-11-27   
659-595 5 Tuscaloosa AL   476   2025-11-27   
661-306 8 Lake Hughes CA   730   2016-08-28   
661-338 8 Lake Hughes CA LSANCARCY1X  730   2016-06-11   
661-464 6 Lake Hughes CA LSANCARCY1X  730   2016-06-11   
661-464 8 Lake Hughes CA LSANCARCY1X  730   2016-06-11   
661-464 9 Lake Hughes CA LSANCARCY1X  730   2016-06-11   
661-516 A Bakersfield: Main DA CA BKFDCAKTX8X  734      
661-516 8 Bakersfield: Main DA CA BKFDCAKTX8X  734   2020-11-21   
661-516 9 Bakersfield: Main DA CA BKFDCAKTX8X  734   2020-11-21   
661-640 A Bakersfield: North DA CA BKFDCAKTX9X  734   2024-09-02   
661-640 8 Bakersfield: North DA CA BKFDCAKTX9X  734   2024-09-02   
661-640 9 Bakersfield: North DA CA BKFDCAKTX9X  734   2024-09-02   
667-202 2 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-202 3 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-202 4 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-202 5 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-202 6 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-202 7 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-202 8 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-202 9 Elkton MD BLTMMDCHXVX  238   2016-05-14   
667-270 9 Annapolis MD BLTMMDCHXVX  238   2020-05-02   
667-286 A Salisbury MD SLBRMD907MD  242      
667-286 8 Salisbury MD SLBRMD907MD  242   2020-10-09   
667-286 9 Salisbury MD SLBRMD907MD  242   2020-10-09   
667-299 A Annapolis MD BLTMMDCHX7Y  238      
667-299 9 Annapolis MD BLTMMDCHX7Y  238   2020-06-01   
667-399 A Union Bridge MD BLTMMDCHXVX  238      
667-399 8 Union Bridge MD BLTMMDCHXVX  238   2020-06-01   
667-399 9 Union Bridge MD BLTMMDCHXVX  238   2020-06-01   
667-600 7 Baltimore MD BLTMMDCHXVX  238   2020-05-02   
667-706 1 Elkton MD BLTMMDCHXVX  238   2016-09-05   
667-706 2 Elkton MD BLTMMDCHXVX  238   2016-09-05   
667-706 3 Elkton MD BLTMMDCHXVX  238   2016-09-05   
667-706 4 Elkton MD BLTMMDCHXVX  238   2016-09-05   
667-706 5 Elkton MD BLTMMDCHXVX  238   2016-09-05   
667-706 6 Elkton MD BLTMMDCHXVX  238   2016-09-05   
667-770 5 Baltimore MD BLTMMDCHXVX  238   2020-05-02   
667-776 A Baltimore MD BLTMMDCHXVX  238      
667-776 9 Baltimore MD BLTMMDCHXVX  238   2019-11-15   
669-206 3 Sunnyvale CA   722   2016-10-22   
669-206 4 Sunnyvale CA SNFCCA21XOZ  722   2016-10-22   
669-206 5 Sunnyvale CA SNFCCA21XOZ  722   2016-10-22   
669-206 6 Sunnyvale CA SNFCCA21XOZ  722   2016-10-22   
669-274 9 San Jose: South DA CA SNFCCA21XOZ  722   2016-06-09   
669-275 0 San Jose: South DA CA SNFCCA21XOZ  722   2016-06-09   
669-275 1 San Jose: South DA CA SNFCCA21XOZ  722   2016-06-09   
669-275 6 San Jose: South DA CA SNFCCA21XOZ  722   2016-06-09   
669-275 8 San Jose: South DA CA SNFCCA21XOZ  722   2016-06-09   
680-254 A Syracuse NY SYRCNY020MD  136      
680-254 8 Syracuse NY SYRCNY020MD  136   2023-05-11   
680-254 9 Syracuse NY SYRCNY020MD  136   2023-05-11   
680-312 9 Syracuse NY   136   2026-01-18   
681-324 A Clendenin WV CHTNWVLEX5X  254      
681-324 8 Clendenin WV CHTNWVLE2MD  254   2020-12-04   
681-324 9 Clendenin WV CHTNWVLEX5X  254   2020-12-04   
681-349 A Morgantown WV MGTWWVDX8MD  256      
681-349 8 Morgantown WV MGTWWVDX8MD  256   2020-11-23   
681-349 9 Morgantown WV MGTWWVDX8MD  256   2020-11-23   
681-350 A Kingwood WV MGTWWVDX9MD  256      
681-350 8 Kingwood WV MGTWWVDX9MD  256   2021-09-19   
681-350 9 Kingwood WV MGTWWVDX9MD  256   2021-09-19   
681-530 3 Fairmont WV   256   2026-02-14   
681-530 4 Fairmont WV   256   2026-02-14   
681-530 5 Fairmont WV   256   2026-02-14   
681-594 3 Huntington Zone 1 WV   254   2026-02-14   
681-594 4 Huntington Zone 1 WV   254   2026-02-14   
681-594 5 Huntington Zone 1 WV   254   2026-02-14   
681-682 7 Madison WV CHTNWVLE2MD  254   2020-11-01   
681-799 A Charleston Zone 1 WV CHTNWVLE2MD  254      
681-799 9 Charleston Zone 1 WV CHTNWVLE2MD  254   2019-03-23   

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Last updated: Sat, 21 Mar 2026 23:53:39 UTC

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