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

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
650-524 9 San Mateo CA 9740 PACIFIC BELL 722      
650-570 A San Mateo CA 9740 PACIFIC BELL 722      
650-570 0 San Mateo CA 9740 PACIFIC BELL 722      
650-570 2 San Mateo CA 9740 PACIFIC BELL 722      
650-570 3 San Mateo CA 9740 PACIFIC BELL 722      
650-570 4 San Mateo CA 9740 PACIFIC BELL 722      
650-570 5 San Mateo CA 9740 PACIFIC BELL 722      
650-570 6 San Mateo CA 9740 PACIFIC BELL 722      
650-570 7 San Mateo CA 9740 PACIFIC BELL 722      
650-571 A San Mateo CA 9740 PACIFIC BELL 722      
650-571 0 San Mateo CA 9740 PACIFIC BELL 722      
650-571 1 San Mateo CA 9740 PACIFIC BELL 722      
650-571 2 San Mateo CA 9740 PACIFIC BELL 722      
650-571 5 San Mateo CA 9740 PACIFIC BELL 722      
650-571 6 San Mateo CA 9740 PACIFIC BELL 722      
650-571 7 San Mateo CA 9740 PACIFIC BELL 722      
650-571 8 San Mateo CA 9740 PACIFIC BELL 722      
650-571 9 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      
650-574 0 San Mateo CA 9740 PACIFIC BELL 722      
650-574 1 San Mateo CA 9740 PACIFIC BELL 722      
650-574 2 San Mateo CA 9740 PACIFIC BELL 722      
650-574 3 San Mateo CA 9740 PACIFIC BELL 722      
650-574 4 San Mateo CA 9740 PACIFIC BELL 722      
650-574 5 San Mateo CA 9740 PACIFIC BELL 722      
650-574 6 San Mateo CA 9740 PACIFIC BELL 722      
650-574 7 San Mateo CA 9740 PACIFIC BELL 722      
650-574 8 San Mateo CA 9740 PACIFIC BELL 722      
650-577 A San Mateo CA 9740 PACIFIC BELL 722      
650-577 0 San Mateo CA 9740 PACIFIC BELL 722      
650-577 1 San Mateo CA 9740 PACIFIC BELL 722      
650-577 2 San Mateo CA 9740 PACIFIC BELL 722      
650-577 4 San Mateo CA 9740 PACIFIC BELL 722      
650-577 5 San Mateo CA 9740 PACIFIC BELL 722      
650-577 6 San Mateo CA 9740 PACIFIC BELL 722      
650-577 7 San Mateo CA 9740 PACIFIC BELL 722      
650-577 8 San Mateo CA 9740 PACIFIC BELL 722      
650-577 9 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      
650-627 0 San Mateo CA 9740 PACIFIC BELL 722      
650-627 1 San Mateo CA 9740 PACIFIC BELL 722      
650-627 2 San Mateo CA 9740 PACIFIC BELL 722      
650-627 5 San Mateo CA 9740 PACIFIC BELL 722      
650-627 8 San Mateo CA 9740 PACIFIC BELL 722      
650-627 9 San Mateo CA 9740 PACIFIC BELL 722      

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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