Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 361 [Rate centres in NPA 361] [Dial plan for NPA 361]

NXX: 421

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
361-421 A Robstown TX   4290 STPCS JOINT VENTURE, LLC 564   2025-06-01   
361-421 0 Robstown TX   903C ONVOY, LLC - TX 564   2026-05-30   
361-421 9 Robstown TX   4290 STPCS JOINT VENTURE, LLC 564   2025-06-01   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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