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: SNFCCAMKX5Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
415-200 1 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722      
415-200 2 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722      
415-200 3 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722      
415-212 4 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-08-05   
415-212 5 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-08-05   
415-212 6 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-08-05   
415-212 7 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-08-05   
415-214 8 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-08-04   
415-214 9 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-08-04   
415-300 1 San Rafael CA 506J TWILIO INTERNATIONAL, INC. 722      
415-300 2 San Rafael CA 506J TWILIO INTERNATIONAL, INC. 722      
415-481 4 San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722   2013-08-26   
415-493 9 Novato CA 506J TWILIO INTERNATIONAL, INC. 722   2006-09-23   
415-702 2 San Francisco: Montrose-Evergreen DA CA 506J TWILIO INTERNATIONAL, INC. 722      
415-702 4 San Francisco: Montrose-Evergreen DA CA 506J TWILIO INTERNATIONAL, INC. 722      
415-704 A San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722      
415-704 2 San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722   2020-09-30   
415-914 1 San Francisco: Central DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-07-21   
415-968 8 Mill Valley CA 506J TWILIO INTERNATIONAL, INC. 722   2014-11-13   
415-980 1 San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-07-13   
415-980 2 San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-07-13   
415-980 3 San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-07-13   
415-980 4 San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-07-13   
415-980 5 San Francisco: Juniper DA CA 506J TWILIO INTERNATIONAL, INC. 722   2015-07-13   
415-985 0 Novato CA 506J TWILIO INTERNATIONAL, INC. 722   2014-09-01   
415-991 8 San Rafael CA 506J TWILIO INTERNATIONAL, INC. 722   2015-09-05   
650-200 A San Mateo CA 506J TWILIO INTERNATIONAL, INC. 722      
650-200 2 San Mateo CA 506J TWILIO INTERNATIONAL, INC. 722      
650-250 0 Palo Alto CA 506J TWILIO INTERNATIONAL, INC. 722   2016-07-10   
650-282 1 Mountain View CA 506J TWILIO INTERNATIONAL, INC. 722   2003-10-12   
650-399 1 Redwood City CA 506J TWILIO INTERNATIONAL, INC. 722      
650-681 2 Palo Alto CA 506J TWILIO INTERNATIONAL, INC. 722      
650-730 2 San Carlos-Belmont CA 506J TWILIO INTERNATIONAL, INC. 722   2003-10-12   
650-835 1 South San Francisco CA 506J TWILIO INTERNATIONAL, INC. 722      
650-885 4 Palo Alto CA 506J TWILIO INTERNATIONAL, INC. 722   2017-09-01   
707-222 3 Miranda CA 506J TWILIO INTERNATIONAL, INC. 722   2020-10-01   
831-498 1 Watsonville CA 506J TWILIO INTERNATIONAL, INC. 722      
831-713 1 Santa Cruz CA 506J TWILIO INTERNATIONAL, INC. 722      
831-713 2 Santa Cruz CA 506J TWILIO INTERNATIONAL, INC. 722      

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

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