Local Calling Guide

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NPA: 520 [Rate centres in NPA 520] [Dial plan for NPA 520]

NXX: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-344 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-344 0 Tucson AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2007-11-06   
520-344 1 Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668   2008-03-24   
520-344 2 Tucson AZ TCSNAZMAXIX  587F BANDWIDTH.COM CLEC, LLC - AZ 668   2009-11-20   
520-344 3 Tucson AZ TCSNAZMAXIX  587F BANDWIDTH.COM CLEC, LLC - AZ 668   2009-11-20   
520-344 4 Tucson AZ TCSNAZMAXIX  587F BANDWIDTH.COM CLEC, LLC - AZ 668   2009-11-20   
520-344 5 Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668   2009-11-29   
520-344 6 Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668   2008-04-05   
520-344 7 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2007-12-10   
520-344 8 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2007-12-10   
520-344 9 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668   2008-02-25   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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