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.

Ben Lomond, CA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
831-218 A SNJSCA02DS4  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722      
831-218 0 SNJSCA02DS4  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722      
831-218 1 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2006-09-11   
831-218 2 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-05-13   
831-218 3 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2008-05-19   
831-218 4 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2009-10-19   
831-218 5 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2010-08-28   
831-218 6 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-12-31   
831-218 7 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-05-13   
831-218 8 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-12-31   
831-218 9 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-04-23   
831-246 A HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-246 0 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-246 1 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-246 2 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-246 3 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-246 4 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-246 5 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-246 6 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2014-09-11   
831-246 7 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2012-04-15   
831-246 8 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2013-04-29   
831-246 9 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-08-31   
831-252 A SNTDCAUJCM9  6010 NEW CINGULAR WIRELESS PCS, LLC 722      
831-278 A HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-278 0 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-278 1 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-278 2 HYWRCAMCDMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 722      
831-278 3 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-04-23   
831-278 4 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2013-06-18   
831-278 5 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2015-10-15   
831-278 6 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-04-23   
831-278 7 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2020-09-09   
831-278 8 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-15   
831-278 9   515J IP HORIZON LLC 722   2016-09-15   
831-289 A OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722      
831-289 0 SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2024-08-18   
831-289 3 OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2022-11-04   
831-336 A BNLMCA11RS2  9740 PACIFIC BELL 722      
831-336 0 BNLMCA11RS2  9740 PACIFIC BELL 722      
831-336 1 BNLMCA11RS2  9740 PACIFIC BELL 722      
831-336 2 BNLMCA11RS2  9740 PACIFIC BELL 722      
831-336 3 BNLMCA11RS2  9740 PACIFIC BELL 722      
831-336 4   145J TERRA NOVA TELECOM INC. 722   2021-01-06   
831-336 5 BNLMCA11RS2  9740 PACIFIC BELL 722      
831-336 6 SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2021-07-23   
831-336 7 SNFCCAMKX1X  9262 UTILITY TELECOM GROUP, LLC - CA 722   2006-06-14   
831-336 8 BNLMCA11RS2  9740 PACIFIC BELL 722      
831-336 9 BNLMCA11RS2  9740 PACIFIC BELL 722      
831-401 A SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-401 2 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-401 3 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-401 4 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2022-02-26   
831-401 5 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2019-03-23   
831-401 6 SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2021-11-07   
831-401 7 SNFCCA21XNZ  624H ONVOY SPECTRUM, LLC 722   2021-11-07   
831-401 8 SNFCCA21XPZ  553J WHITESKY COMMUNICATIONS, LLC 722   2021-09-16   
831-401 9 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-532 A SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
831-532 0 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2020-01-16   
831-532 3 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2018-11-16   
831-532 4 SNJUCACL8MD  145J TERRA NOVA TELECOM INC. 722   2024-10-14   
831-532 5 SNFCCA01XGX  516C AT&T CORP. 722   2011-09-26   
831-532 6 SNJUCACL3MD  073H TELNYX LLC 722   2017-07-20   
831-532 8 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2005-06-13   
831-532 9 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2005-06-13   
831-604 A SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
831-609 A SNFCCAMKDS3  649C ONVOY, LLC - CA 722      
831-609 0 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-12-30   
831-609 1   515J IP HORIZON LLC 722      
831-609 2   515J IP HORIZON LLC 722      
831-609 3 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2013-03-29   
831-609 4 SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2016-05-09   
831-609 5 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2005-08-07   
831-609 6 OKLDCA03XOY  318J COMCAST IP PHONE, LLC 722   2006-05-05   
831-609 7 SNVACAHZ0MD  508J CENTURYLINK COMMUNICATIONS, LLC 722   2014-05-20   
831-609 8 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2010-05-17   
831-609 9 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-12-30   
831-709 A SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-709 0 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-24   
831-709 1 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722      
831-709 2 SNJUCACLDS1  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 722   2010-02-15   
831-709 4 SNFCCASY5MD  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 722   2004-01-13   
831-709 5 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-25   
831-709 6 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-25   
831-709 7 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2009-12-18   
831-709 8 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2016-02-24   
831-709 9 SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2015-07-30   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.