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: 638

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-638 A Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-638 0 Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-638 1 Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-638 2 Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-638 3 Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-638 4 Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-638 5 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668      
520-638 6 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668      
520-638 7 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668      
520-638 8 Tucson AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668      
520-638 9 Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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