Local Calling Guide

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

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-301 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-302 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-303 A Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2025-03-09   
520-304 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-305 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-306 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-307 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-308 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-309 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-310 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-312 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-313 A Nogales AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-314 A Tucson AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668      
520-315 A Casa Blanca AZ LNBTAZXCDS1  2179 GILA RIVER TELECOMM, INC. 666      
520-316 A Casa Grande AZ CSGRAZMADS0  9636 QWEST CORPORATION 666      
520-317 A Hayden AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      
520-318 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-319 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-320 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-321 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-322 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-323 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-324 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-325 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668   2024-01-27   
520-326 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-327 A Tucson AZ TCSNAZEADS0  9636 QWEST CORPORATION 668      
520-328 A Tucson AZ TCSNAZMADS1  9636 QWEST CORPORATION 668      
520-329 A Tucson AZ TCSNAZMAXKX  7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 668      
520-330 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-331 A Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-332 A Tucson AZ TCSMAZOI3MD  6529 T-MOBILE USA, INC. 668      
520-333 A Tucson AZ TCSNAZMAXEY  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 668      
520-334 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-335 A Sierra Vista AZ TCSNAZMAXCY  318J COMCAST IP PHONE, LLC 668      
520-336 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-337 A Willcox AZ TCSNAZMAVMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668      
520-338 A Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      
520-339 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-340 A Casa Grande AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666      
520-341 A Nogales AZ TCSMAZCH7MD  073H TELNYX LLC 668      
520-342 A Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      
520-343 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-344 A Tucson AZ TCSMAZCH1MD  6010 NEW CINGULAR WIRELESS PCS, LLC 668      
520-345 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-346 A Bisbee AZ TCSMAZCHDS0  579F PEERLESS NETWORK OF ARIZONA, LLC - AZ 668      
520-347 A Tucson AZ TCSNAZMAX6Y  073H TELNYX LLC 668      
520-348 A Willcox AZ TCSNAZMAXYX  508J CENTURYLINK COMMUNICATIONS, LLC 668      
520-349 A Tucson AZ TCSNAZXGAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 668      
520-350 A Casa Grande AZ LNBTAZXCDS3  947E GILA LOCAL EXCHANGE CARRIER, INC. - AZ 666      
520-351 A Tucson AZ TCSMAZSJAMD  7552 LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 668      

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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