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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
656-202 1 Zephyrhills FL TAMPFLXAX3X  952   2022-02-25   
656-202 2 Zephyrhills FL TAMPFLXAX3X  952   2022-02-25   
656-333 1 Tampa East FL TAMPFLXAX3X  952   2022-02-25   
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   
659-559 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   
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 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   
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   
681-682 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   
686-888 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 6 Dickinson ND BSMRNDBCX9X  638   2017-04-08   
701-365 A Fargo ND FARGNDBCX2Y  636      
701-365 7 Fargo ND FARGNDBCX2Y  636   2021-03-15   
701-365 9 Fargo ND FARGNDBCX2Y  636   2021-03-15   
701-719 0 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 1 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 2 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 3 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 4 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 5 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 6 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 7 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-719 9 Belfield ND BSMRNDBCX9X  638   2016-05-06   
701-779 A Dickinson ND BSMRNDBCXCX  638      
701-779 9 Dickinson ND BSMRNDBCXCX  638   2019-10-20   
701-791 A Bismarck ND BSMRNDBCX9X  638      
701-791 7 Bismarck ND BSMRNDBCXCX  638   2020-06-05   

<< 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 >>

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.