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.

Santa Cruz, CA

<< 1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
831-421 5   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-421 6   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-421 7   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-421 8   9262 UTILITY TELECOM GROUP, LLC - CA 722      
831-421 9   9740 PACIFIC BELL 722      
831-423 A SNCZCA01DS0  9740 PACIFIC BELL 722      
831-425 A SNCZCA01DS0  9740 PACIFIC BELL 722      
831-425 0   9740 PACIFIC BELL 722      
831-425 1   9740 PACIFIC BELL 722      
831-425 2   9740 PACIFIC BELL 722      
831-425 3   9740 PACIFIC BELL 722      
831-425 4   9740 PACIFIC BELL 722      
831-425 5   9740 PACIFIC BELL 722      
831-425 6   9740 PACIFIC BELL 722      
831-425 7   9740 PACIFIC BELL 722      
831-425 8   9740 PACIFIC BELL 722      
831-425 9   649C ONVOY, LLC - CA 722   2016-03-27   
831-426 A SNCZCA01DS0  9740 PACIFIC BELL 722      
831-427 A SNCZCA01DS0  9740 PACIFIC BELL 722      
831-427 0   9740 PACIFIC BELL 722      
831-427 1   9740 PACIFIC BELL 722      
831-427 2   9740 PACIFIC BELL 722      
831-427 3   9740 PACIFIC BELL 722      
831-427 4   9740 PACIFIC BELL 722      
831-427 5   9740 PACIFIC BELL 722      
831-427 6   9740 PACIFIC BELL 722      
831-427 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2009-09-28   
831-427 8   9740 PACIFIC BELL 722      
831-427 9   9740 PACIFIC BELL 722      
831-428 A OKLECAZV1MD  5562 METROPCS, INC. 722      
831-428 0   073H TELNYX LLC 722   2022-12-22   
831-428 1   5562 METROPCS, INC. 722   2007-09-18   
831-428 2   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2005-07-11   
831-428 3   5562 METROPCS, INC. 722   2007-09-18   
831-428 4   5562 METROPCS, INC. 722   2012-07-27   
831-428 5   5562 METROPCS, INC. 722      
831-428 6   5562 METROPCS, INC. 722   2012-07-27   
831-428 7   508J CENTURYLINK COMMUNICATIONS, LLC 722   2014-04-09   
831-428 8   649C ONVOY, LLC - CA 722   2013-03-29   
831-428 9   5562 METROPCS, INC. 722      
831-429 A SNCZCA01DS0  9740 PACIFIC BELL 722      
831-430 A SCVYCA01DS0  9740 PACIFIC BELL 722      
831-430 0   9740 PACIFIC BELL 722      
831-430 1   9740 PACIFIC BELL 722      
831-430 2   9740 PACIFIC BELL 722      
831-430 3   9740 PACIFIC BELL 722      
831-430 4   9740 PACIFIC BELL 722      
831-430 5   9740 PACIFIC BELL 722      
831-430 6   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2005-09-06   
831-430 7   7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2019-08-17   
831-430 8   5562 METROPCS, INC. 722   2007-01-21   
831-430 9   9740 PACIFIC BELL 722      
831-431 A SCVYCA01DS0  9740 PACIFIC BELL 722      
831-431 0   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2005-06-10   
831-431 1   9740 PACIFIC BELL 722      
831-431 2   9740 PACIFIC BELL 722      
831-431 3   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2005-06-10   
831-431 4   9740 PACIFIC BELL 722      
831-431 5   9740 PACIFIC BELL 722      
831-431 6   318J COMCAST IP PHONE, LLC 722   2010-08-18   
831-431 7   5562 METROPCS, INC. 722   2006-04-03   
831-431 8   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2009-06-23   
831-431 9   5562 METROPCS, INC. 722   2010-09-14   
831-435 A SNCZCA01DS0  9740 PACIFIC BELL 722      
831-435 0   5562 METROPCS, INC. 722   2008-07-24   
831-435 1   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-01-12   
831-435 2   9740 PACIFIC BELL 722      
831-435 3   145J TERRA NOVA TELECOM INC. 722   2025-02-14   
831-435 4   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2025-04-18   
831-435 5   5562 METROPCS, INC. 722   2003-10-21   
831-435 6   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2012-08-31   
831-435 7   9262 UTILITY TELECOM GROUP, LLC - CA 722   2006-06-14   
831-435 8   5562 METROPCS, INC. 722   2007-11-11   
831-435 9   6010 NEW CINGULAR WIRELESS PCS, LLC 722   2006-06-08   
831-438 A SCVYCA01DS0  9740 PACIFIC BELL 722      
831-439 A SCVYCA01DS0  9740 PACIFIC BELL 722      
831-439 0   9740 PACIFIC BELL 722      
831-439 1   9740 PACIFIC BELL 722      
831-439 2   318J COMCAST IP PHONE, LLC 722   2020-04-03   
831-439 3   9740 PACIFIC BELL 722      
831-439 4   5562 METROPCS, INC. 722   2017-10-12   
831-439 5   9740 PACIFIC BELL 722      
831-439 6   9740 PACIFIC BELL 722      
831-439 7   9740 PACIFIC BELL 722      
831-439 8   9740 PACIFIC BELL 722      
831-439 9   9740 PACIFIC BELL 722      
831-440 A SCVYCA01DS0  9740 PACIFIC BELL 722      
831-440 0   9740 PACIFIC BELL 722      
831-440 1   9740 PACIFIC BELL 722      
831-440 2   9740 PACIFIC BELL 722      
831-440 3   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2006-01-28   
831-440 4   9740 PACIFIC BELL 722      
831-440 5   9740 PACIFIC BELL 722      
831-440 6   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722   2012-12-19   
831-440 7   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2006-01-28   
831-440 8   8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2006-01-28   
831-440 9   9740 PACIFIC BELL 722      
831-454 A SNCZCA01DS0  9740 PACIFIC BELL 722      
831-454 0   9740 PACIFIC BELL 722      
831-454 1   9740 PACIFIC BELL 722      

<< 1 2 3 4 5 6 >>

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.