Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 2319 FRONTIER CALIFORNIA INC.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
909-477 3 Upland CA   730      
909-477 4 Upland CA   730      
909-477 5 Upland CA   730      
909-477 6 Upland CA   730      
909-477 8 Upland CA   730      
909-478 A Redlands CA LMLNCAXF79L  730      
909-478 0 Redlands CA   730      
909-478 1 Redlands CA   730      
909-478 3 Redlands CA   730      
909-478 5 Redlands CA   730      
909-478 6 Redlands CA   730      
909-478 7 Redlands CA   730      
909-478 9 Redlands CA   730      
909-480 A Claremont-San Dimas CA WLNTCAXFDS0  730      
909-480 0 Claremont-San Dimas CA   730      
909-481 A Upland CA CCMNCAXFDS1  730      
909-482 A Claremont-San Dimas CA CLMTCAXF62G  730      
909-483 A Upland CA CCMNCAXF98K  730      
909-484 A Upland CA CCMNCAXFDS1  730      
909-501 A San Bernardino CA SNBRCAXK88E  730      
909-501 0 San Bernardino CA   730   2015-10-04   
909-517 A Chino CA CHNOCAXF62J  730      
909-548 A Chino CA CHNOCAXF62J  730      
909-548 0 Chino CA   730      
909-548 2 Chino CA   730      
909-548 3 Chino CA   730      
909-548 4 Chino CA   730      
909-548 6 Chino CA   730      
909-548 7 Chino CA   730      
909-558 A Redlands CA RDLDCAXF79K  730      
909-579 A Upland CA UPLDCAXF98G  730      
909-579 0 Upland CA   730      
909-579 1 Upland CA   730      
909-579 4 Upland CA   730      
909-579 5 Upland CA   730      
909-579 6 Upland CA   730      
909-579 8 Upland CA   730      
909-581 A Upland CA CCMNCAXFDS1  730      
909-581 0 Upland CA   730      
909-581 1 Upland CA   730      
909-581 3 Upland CA   730      
909-590 A Chino CA CHNOCAXF62J  730      
909-591 A Chino CA CHNOCAXF62J  730      
909-592 A Claremont-San Dimas CA SNDMCAXF59C  730      
909-593 A Claremont-San Dimas CA LVRNCAXF59H  730      
909-594 A Diamond Bar CA WLNTCAXFDS0  730      
909-595 A Diamond Bar CA WLNTCAXFDS0  730      
909-596 A Claremont-San Dimas CA LVRNCAXF59H  730      
909-597 A Chino CA LSSRCAXF59J  730      
909-598 A Diamond Bar CA WLNTCAXFDS0  730      

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

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