Local Calling Guide

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

NXX: 284

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-284 A Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668      
520-284 0 Tucson AZ   630E ONVOY, LLC - AZ 668   2009-06-12   
520-284 1 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-05-11   
520-284 2 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-05-11   
520-284 3 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-06-25   
520-284 4 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-06-25   
520-284 5 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-06-25   
520-284 6 Tucson AZ TCSNAZMAXIX  587F BANDWIDTH.COM CLEC, LLC - AZ 668   2023-01-14   
520-284 7 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-06-18   
520-284 8 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-06-18   
520-284 9 Tucson AZ TCSNAZXGDS0  7465 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AZ 668   2009-06-18   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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