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.
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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
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 SNFCCA21XOZ  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 SNFCCA21XOZ  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 SYRCNY020MD  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 MGTWWVDX8MD  256   2026-02-14   
681-530 4 Fairmont WV MGTWWVDX8MD  256   2026-02-14   
681-530 5 Fairmont WV MGTWWVDX8MD  256   2026-02-14   
681-594 3 Huntington Zone 1 WV CHTNWVLE2MD  254   2026-02-14   
681-594 4 Huntington Zone 1 WV CHTNWVLE2MD  254   2026-02-14   
681-594 5 Huntington Zone 1 WV CHTNWVLE2MD  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   
682-506 5 Fort Worth TX   552   2026-10-12   
682-506 6 Fort Worth TX   552   2026-10-12   
682-506 7 Fort Worth TX   552   2026-10-12   
686-208 3 Richmond VA RCMDVAITXZX  248   2026-01-31   
686-208 4 Richmond VA RCMDVAITXZX  248   2026-01-31   
686-208 5 Richmond VA RCMDVAITXZX  248   2026-01-31   
686-888 6 Richmond VA RCMDVAITXZX  248   2025-08-25   
686-888 7 Richmond VA RCMDVAITXZX  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   

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

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