Local Calling Guide

Area code/prefix search

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NPA: 341 [Rate centres in NPA 341] [Dial plan for NPA 341]

NXX: 220

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
341-220 A Oakland: Main-Piedmont DA CA SNRSCA01KMD  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722      
341-220 0 Oakland: Main-Piedmont DA CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2022-12-19   
341-220 1 Oakland: Main-Piedmont DA CA SNFCCAMKDS3  649C ONVOY, LLC - CA 722   2022-12-19   
341-220 2 Oakland: Main-Piedmont DA CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2022-11-01   
341-220 3 Oakland: Main-Piedmont DA CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2022-11-01   
341-220 4 Oakland: Main-Piedmont DA CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2022-11-01   
341-220 5 Oakland: Main-Piedmont DA CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2022-11-01   
341-220 6 Oakland: Main-Piedmont DA CA HYWRCA115MD  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 722   2022-11-01   
341-220 7 Oakland: Main-Piedmont DA CA SNRSCA01KMD  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2022-10-21   
341-220 8 Oakland: Main-Piedmont DA CA SNRSCA01KMD  7145 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 722   2022-10-21   
341-220 9 Oakland: Main-Piedmont DA CA SNFCCA21XUY  981E BANDWIDTH.COM CLEC, LLC - CA 722   2022-11-25   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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