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.

Del Mar, CA

<< 1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
858-523 7   9740 PACIFIC BELL 732      
858-523 8   981E BANDWIDTH.COM CLEC, LLC - CA 732   2009-01-14   
858-523 9   9740 PACIFIC BELL 732      
858-617 A SNDHCAAXJMD  7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 732      
858-617 0   981E BANDWIDTH.COM CLEC, LLC - CA 732   2011-05-28   
858-617 1   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 732   2008-01-06   
858-617 2   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 732   2007-05-02   
858-617 3   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 732   2007-05-02   
858-617 4   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 732   2007-05-02   
858-617 5   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 732   2007-05-02   
858-617 6   7718 LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 732      
858-617 7   9740 PACIFIC BELL 732   2004-02-06   
858-617 8   981E BANDWIDTH.COM CLEC, LLC - CA 732   2011-05-28   
858-617 9   6529 T-MOBILE USA, INC. 732   2010-05-15   
858-703 A SNDICAETDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-703 0   6529 T-MOBILE USA, INC. 732   2018-07-14   
858-703 1   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2012-05-04   
858-703 2   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-703 3   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-703 4   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-703 5   649C ONVOY, LLC - CA 732   2011-09-28   
858-703 6   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2013-04-01   
858-703 7   6010 NEW CINGULAR WIRELESS PCS, LLC 732   2008-03-04   
858-703 8   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2013-04-01   
858-703 9   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-704 A SNDICAETDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-704 0   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-704 1   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-704 2   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2012-05-04   
858-704 3   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-704 4   318J COMCAST IP PHONE, LLC 732   2011-12-18   
858-704 5   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-704 6   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2012-05-04   
858-704 7   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732   2005-09-22   
858-704 8   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732   2006-11-17   
858-704 9   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2012-05-04   
858-720 A DLMRCA12DS0  9740 PACIFIC BELL 732      
858-724 A SNDICAETDS0  7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-724 0   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-724 1   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-724 2   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-724 3   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-724 4   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2012-05-04   
858-724 5   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2012-05-04   
858-724 6   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-724 7   373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 732   2012-05-04   
858-724 8   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-724 9   7240 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 732      
858-755 A DLMRCA12DS0  9740 PACIFIC BELL 732      
858-764 A   829J PAETEC ITEL, LLC 732      

<< 1 2 3 4 5 6 7 8 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.