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
657-387 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   

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

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