Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 520 [Rate centres in NPA 520] [Dial plan for NPA 520]

NXX: 777

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-777 A Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      
520-777 0 Tucson AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2005-02-26   
520-777 1 Tucson AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2006-01-28   
520-777 2 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668   2004-12-18   
520-777 3 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2005-05-31   
520-777 4 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2005-05-31   
520-777 5 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2005-05-31   
520-777 6 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2005-05-31   
520-777 7 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2005-05-31   
520-777 8 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2005-05-31   
520-777 9 Tucson AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2006-01-28   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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