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: SNMTCA11DS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-341 A San Mateo CA 9740 PACIFIC BELL 722      
650-345 A San Mateo CA 9740 PACIFIC BELL 722      
650-349 A San Mateo CA 9740 PACIFIC BELL 722      
650-356 A San Mateo CA 9740 PACIFIC BELL 722      
650-357 A San Mateo CA 9740 PACIFIC BELL 722      
650-358 A San Mateo CA 9740 PACIFIC BELL 722      
650-372 A San Mateo CA 9740 PACIFIC BELL 722      
650-377 A San Mateo CA 9740 PACIFIC BELL 722      
650-378 A San Mateo CA 9740 PACIFIC BELL 722      
650-522 A San Mateo CA 9740 PACIFIC BELL 722      
650-524 A San Mateo CA 9740 PACIFIC BELL 722      
650-570 A San Mateo CA 9740 PACIFIC BELL 722      
650-571 A San Mateo CA 9740 PACIFIC BELL 722      
650-572 A San Mateo CA 9740 PACIFIC BELL 722      
650-573 A San Mateo CA 9740 PACIFIC BELL 722      
650-574 A San Mateo CA 9740 PACIFIC BELL 722      
650-577 A San Mateo CA 9740 PACIFIC BELL 722      
650-578 A San Mateo CA 9740 PACIFIC BELL 722      
650-627 A San Mateo CA 9740 PACIFIC BELL 722      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.