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.

Switch: BRSBCABECM0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-201 A South San Francisco CA 6664 SPRINT SPECTRUM L.P. 722      
650-218 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-219 A South San Francisco CA 6664 SPRINT SPECTRUM L.P. 722      
650-248 A Palo Alto CA 6664 SPRINT SPECTRUM L.P. 722      
650-270 A South San Francisco CA 6664 SPRINT SPECTRUM L.P. 722      
650-274 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-281 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-315 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-346 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-468 A Palo Alto CA 6664 SPRINT SPECTRUM L.P. 722      
650-520 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-533 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-544 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      
650-776 A Palo Alto CA 6664 SPRINT SPECTRUM L.P. 722      
650-784 A South San Francisco CA 6664 SPRINT SPECTRUM L.P. 722      
650-814 A Palo Alto CA 6664 SPRINT SPECTRUM L.P. 722      
650-906 A Palo Alto CA 6664 SPRINT SPECTRUM L.P. 722      
650-954 A San Mateo CA 6664 SPRINT SPECTRUM L.P. 722      

Last updated: Wed, 05 Feb 2020 02:15:44 UTC

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