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
657-857 5 Orange CA   730   2026-06-18   
657-857 6 Orange CA   730   2026-06-18   
657-857 7 Orange CA   730   2026-06-18   
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   
661-642 2 Delano CA   734   2026-05-15   
661-642 3 Delano CA   734   2026-05-15   
661-642 4 Delano CA   734   2026-05-15   
661-642 5 Delano CA   734   2026-05-15   
661-681 6 Bakersfield: North DA CA   734   2026-05-15   
661-681 7 Bakersfield: North DA CA   734   2026-05-15   
661-681 8 Bakersfield: North DA CA   734   2026-05-15   
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   
669-365 7 San Jose: South DA CA   722   2026-05-25   
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   
686-208 3 Richmond VA   248   2026-01-31   
686-208 4 Richmond VA   248   2026-01-31   
686-208 5 Richmond VA   248   2026-01-31   
686-888 6 Richmond VA   248   2025-08-25   
686-888 7 Richmond VA   248   2025-08-25   
689-221 A Orlando FL ORLDFL60XAX  45806      
689-221 8 Orlando FL ORLDFL60XAX  45806   2020-09-14   
689-221 9 Orlando FL ORLDFL60XAX  45806   2020-09-14   
689-260 A Kissimmee FL ORLDFL60X3Y  45808      
689-260 8 Kissimmee FL ORLDFL60X3Y  45808   2021-12-06   
689-260 9 Kissimmee FL ORLDFL60X3Y  45808   2021-12-06   
701-300 5 Dickinson ND   638   2017-04-08   
701-300 6 Dickinson ND BSMRNDBCX9X  638   2017-04-08   
701-365 A Fargo ND FARGNDBCX2Y  636      

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Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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