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: 2319 FRONTIER CALIFORNIA INC.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
909-460 6 Ontario CA   730      
909-460 7 Ontario CA   730      
909-460 9 Ontario CA   730      
909-463 A Etiwanda CA ETWNCAXF89L  730      
909-463 0 Etiwanda CA   730      
909-463 1 Etiwanda CA   730      
909-463 2 Etiwanda CA   730   2003-03-18   
909-463 3 Etiwanda CA   730      
909-463 4 Etiwanda CA   730   2001-11-15   
909-463 5 Etiwanda CA   730      
909-463 6 Etiwanda CA   730      
909-463 7 Etiwanda CA   730   2002-05-28   
909-463 9 Etiwanda CA   730   2001-06-13   
909-464 A Chino CA CHNOCAXF62J  730      
909-465 A Chino CA CHNOCAXF62J  730      
909-465 0 Chino CA   730      
909-465 1 Chino CA   730      
909-465 5 Chino CA   730      
909-465 6 Chino CA   730      
909-465 9 Chino CA   730      
909-466 A Upland CA CCMNCAXF98K  730      
909-467 A Ontario CA ONTRCAXF98K  730      
909-467 0 Ontario CA   730      
909-467 1 Ontario CA   730      
909-467 2 Ontario CA   730      
909-467 3 Ontario CA   730      
909-467 4 Ontario CA   730      
909-467 5 Ontario CA   730      
909-468 A Diamond Bar CA WLNTCAXFDS0  730      
909-469 A Pomona CA POMNCAXF62E  730      
909-473 A Marshall CA MSCYCAXF88K  730      
909-473 0 Marshall CA   730      
909-473 1 Marshall CA   730      
909-473 2 Marshall CA   730      
909-473 3 Marshall CA   730      
909-473 6 Marshall CA   730      
909-473 7 Marshall CA   730      
909-473 8 Marshall CA   730      
909-473 9 Marshall CA   730      
909-474 A Marshall CA RDLDCAXF79K  730      
909-474 0 Marshall CA   730      
909-475 A Marshall CA SNBRCAXH88K  730      
909-475 1 Marshall CA   730      
909-475 2 Marshall CA   730      
909-475 5 Marshall CA   730      
909-475 8 Marshall CA   730      
909-475 9 Marshall CA   730      
909-476 A Upland CA CCMNCAXFDS1  730      
909-477 A Upland CA CCMNCAXF98K  730      
909-477 2 Upland CA   730      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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