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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Switch: SLNSCA01X8Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-207 A Hollister CA 6529 T-MOBILE USA, INC. 736      
831-210 A Salinas CA 6529 T-MOBILE USA, INC. 736      
831-224 A Monterey CA 6529 T-MOBILE USA, INC. 736      
831-240 A Salinas CA 6529 T-MOBILE USA, INC. 736      
831-297 A Hollister CA 6529 T-MOBILE USA, INC. 736      
831-383 A Monterey CA 5562 METROPCS, INC. 736      
831-512 A Salinas CA 6529 T-MOBILE USA, INC. 736      
831-585 A Salinas CA 5562 METROPCS, INC. 736      
831-760 A Monterey CA 5562 METROPCS, INC. 736      
831-774 A Gonzales CA 5562 METROPCS, INC. 736      
831-776 A Salinas CA 5562 METROPCS, INC. 736      
831-785 A Salinas CA 5562 METROPCS, INC. 736      
831-794 A Salinas CA 5562 METROPCS, INC. 736      
831-869 A Monterey CA 5562 METROPCS, INC. 736      
831-902 A Hollister CA 5562 METROPCS, INC. 736      
831-970 A Salinas CA 6529 T-MOBILE USA, INC. 736      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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