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.

OCN: 7240 MCI WORLDCOM COMMUNICATIONS, INC., CA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
650-238 3 South San Francisco CA   722      
650-238 5 South San Francisco CA   722      
650-253 A Mountain View CA HYWRCAMCDS0  722      
650-253 0 Mountain View CA   722   2004-06-18   
650-253 1 Mountain View CA   722   2004-06-18   
650-253 2 Mountain View CA   722   2004-06-18   
650-253 3 Mountain View CA   722   2004-06-18   
650-253 4 Mountain View CA   722   2004-06-18   
650-253 5 Mountain View CA   722   2004-06-18   
650-253 6 Mountain View CA   722   2004-06-18   
650-253 7 Mountain View CA   722   2004-06-18   
650-253 8 Mountain View CA   722   2004-06-18   
650-253 9 Mountain View CA   722   2004-06-18   
650-262 2 Pescadero CA   722   2003-09-14   
650-263 A Moss Beach CA RDCYCAGDDS0  722      
650-263 3 Moss Beach CA   722   2003-09-14   
650-290 5 Pacifica CA   722   2003-09-14   
650-316 6 Mountain View CA   722   2009-06-18   
650-379 A South San Francisco CA   722   2017-10-12   
650-379 3 South San Francisco CA   722   2017-10-12   
650-419 5 La Honda CA   722   2003-09-14   
650-425 6 San Mateo CA   722      
650-427 A Palo Alto CA RDCYCAGDDS0  722   2007-02-10   
650-427 1 Palo Alto CA   722   2007-02-10   
650-427 2 Palo Alto CA   722   2007-02-10   
650-427 3 Palo Alto CA   722   2007-02-10   
650-427 4 Palo Alto CA   722   2007-02-10   
650-427 5 Palo Alto CA   722   2007-02-10   
650-427 6 Palo Alto CA   722   2007-02-10   
650-427 7 Palo Alto CA   722   2007-02-10   
650-427 8 Palo Alto CA   722   2007-02-10   
650-429 A Mountain View CA RDCYCAGDDS0  722      
650-429 0 Mountain View CA   722      
650-429 1 Mountain View CA   722      
650-429 2 Mountain View CA   722      
650-429 3 Mountain View CA   722      
650-429 4 Mountain View CA   722      
650-429 5 Mountain View CA   722      
650-429 6 Mountain View CA   722   2014-10-16   
650-429 7 Mountain View CA   722      
650-429 9 Mountain View CA   722      
650-480 5 Redwood City CA   722      
650-481 A Redwood City CA RDCYCAGDDS0  722      
650-481 0 Redwood City CA   722      
650-481 1 Redwood City CA   722      
650-481 2 Redwood City CA   722      
650-481 3 Redwood City CA   722      
650-481 4 Redwood City CA   722      
650-484 3 San Mateo CA   722   2016-10-07   
650-534 1 South San Francisco CA   722      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 >>

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.