Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 650 [Rate centres in NPA 650] [Dial plan for NPA 650]

NXX: 642

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
650-642 A San Mateo CA OKLECAZV1MD  6529 T-MOBILE USA, INC. 722      
650-642 0 San Mateo CA   6529 T-MOBILE USA, INC. 722      
650-642 1 San Mateo CA   6529 T-MOBILE USA, INC. 722      
650-642 2 San Mateo CA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2012-08-14   
650-642 3 San Mateo CA   981E BANDWIDTH.COM CLEC, LLC - CA 722   2011-06-24   
650-642 4 San Mateo CA   6529 T-MOBILE USA, INC. 722      
650-642 5 San Mateo CA   6529 T-MOBILE USA, INC. 722      
650-642 6 San Mateo CA   5562 METROPCS, INC. 722      
650-642 7 San Mateo CA   6529 T-MOBILE USA, INC. 722      
650-642 8 San Mateo CA   6529 T-MOBILE USA, INC. 722      
650-642 9 San Mateo CA   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2013-07-25   

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

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