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: SNFCCAMKXOY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
341-240 4 Hayward CA 732J NUSO, LLC 722   2024-04-20   
369-210 9 Santa Rosa CA 732J NUSO, LLC 722   2024-08-27   
369-214 9 Santa Rosa CA 732J NUSO, LLC 722   2024-04-20   
650-702 A Palo Alto CA 732J NUSO, LLC 722      
650-702 6 Palo Alto CA 732J NUSO, LLC 722   2023-05-06   
650-853 9 Palo Alto CA 732J NUSO, LLC 722   2023-12-09   
669-341 8 San Jose: West DA CA 732J NUSO, LLC 722   2024-05-06   
669-347 2 San Jose: West DA CA 732J NUSO, LLC 722   2024-10-01   
669-347 3 San Jose: West DA CA 732J NUSO, LLC 722   2024-10-01   
707-241 2 Petaluma: Main DA CA 732J NUSO, LLC 722   2024-12-15   
707-870 2 Santa Rosa CA 732J NUSO, LLC 722   2024-08-13   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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