Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 770

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-770 A Laredo TX SNANTX39TMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 566   2024-11-02   
956-770 0 Laredo TX   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 566   2024-11-02   
956-770 1 Laredo TX   6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 566   2024-11-02   
956-770 2 Laredo TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2025-01-04   
956-770 3 Laredo TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2025-01-04   
956-770 4 Laredo TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2025-01-04   
956-770 5 Laredo TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2025-01-04   
956-770 6 Laredo TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2025-01-04   
956-770 7 Laredo TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2025-01-04   
956-770 8 Laredo TX   177F PEERLESS NETWORK OF TEXAS, LLC - TX 566   2024-11-22   
956-770 9 Laredo TX   903C ONVOY, LLC - TX 566   2024-11-11   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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