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: 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
628-234 7 San Rafael CA SNJSCAYB0MD  722   2015-05-10   
628-234 8 San Rafael CA SNJSCAYB0MD  722   2015-05-10   
628-235 6 San Francisco: Central DA CA SNJSCAYB0MD  722   2016-01-28   
628-236 2 Novato CA SNJSCAYB0MD  722   2016-05-16   
628-241 3 San Francisco: Juniper DA CA SNJSCAYB0MD  722   2016-08-28   
629-342 A Nashville TN NSVMTN179MD  470   2026-07-21   
629-342 3 Nashville TN NSVMTN179MD  470   2026-07-21   
640-308 A Pleasantville NJ   220   2026-11-17   
640-308 2 Pleasantville NJ   220   2026-11-17   
645-253 A Miami FL MIATFLADBMD  46017   2026-05-05   
645-253 7 Miami FL MIATFLADBMD  46017   2026-05-05   
650-206 A Woodside CA SNJSCAYB0MD  722      
650-206 6 Woodside CA SNJSCAYB0MD  722   2004-04-09   
650-209 A Los Altos CA SNJSCAYB0MD  722      
650-209 1 Los Altos CA SNJSCAYB0MD  722      
650-209 3 Los Altos CA SNJSCAYB0MD  722      
650-209 9 Los Altos CA SNJSCAYB0MD  722      
650-223 A Palo Alto CA SNJSCAYB0MD  722      
650-223 0 Palo Alto CA SNJSCAYB0MD  722      
650-223 2 Palo Alto CA SNJSCAYB0MD  722      
650-223 6 Palo Alto CA SNJSCAYB0MD  722      
650-223 7 Palo Alto CA SNJSCAYB0MD  722      
650-223 8 Palo Alto CA SNJSCAYB0MD  722      
650-235 7 San Mateo CA SNJSCAYB0MD  722   2009-11-21   
650-241 6 Redwood City CA SNJSCAYB0MD  722   2008-11-16   
650-241 7 Redwood City CA SNJSCAYB0MD  722   2007-12-27   
650-243 A South San Francisco CA SNJSCAYB0MD  722      
650-243 2 South San Francisco CA SNJSCAYB0MD  722      
650-243 3 South San Francisco CA SNJSCAYB0MD  722      
650-243 4 South San Francisco CA SNJSCAYB0MD  722      
650-243 5 South San Francisco CA SNJSCAYB0MD  722      
650-243 6 South San Francisco CA SNJSCAYB0MD  722      
650-243 9 South San Francisco CA SNJSCAYB0MD  722      
650-267 7 South San Francisco CA SNJSCAYB0MD  722   2004-02-02   
650-314 7 Mountain View CA SNJSCAYB0MD  722   2008-11-16   
650-393 6 San Mateo CA SNJSCAYB0MD  722   2004-02-02   
650-393 8 San Mateo CA SNJSCAYB0MD  722   2008-09-04   
650-409 A Millbrae CA SNJSCAYB0MD  722      
650-409 0 Millbrae CA SNJSCAYB0MD  722      
650-409 4 Millbrae CA SNJSCAYB0MD  722      
650-416 A South San Francisco CA SNJSCAYB0MD  722      
650-416 2 South San Francisco CA SNJSCAYB0MD  722      
650-416 3 South San Francisco CA SNJSCAYB0MD  722      
650-416 5 South San Francisco CA SNJSCAYB0MD  722      
650-416 7 South San Francisco CA SNJSCAYB0MD  722      
650-417 A Mountain View CA SNJSCAYB0MD  722      
650-417 0 Mountain View CA SNJSCAYB0MD  722      
650-417 2 Mountain View CA SNJSCAYB0MD  722      
650-417 6 Mountain View CA SNJSCAYB0MD  722      
650-417 7 Mountain View CA SNJSCAYB0MD  722      

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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