Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 737 [Rate centres in NPA 737] [Dial plan for NPA 737]

NXX: 422

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-422 A San Marcos TX AUSTTXGR52Z  145J TERRA NOVA TELECOM INC. 558      
737-422 0 San Marcos TX SMRCTXXAYMD  903C ONVOY, LLC - TX 558   2025-12-14   
737-422 2 San Marcos TX   145J TERRA NOVA TELECOM INC. 558   2025-09-09   
737-422 4 San Marcos TX AUSWTXGX3MD  5562 METROPCS, INC. 558   2026-07-10   

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

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