Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: AUSWTXGXBMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
737-342 A Austin TX 6529 T-MOBILE USA, INC. 558      
737-363 A Austin TX 6529 T-MOBILE USA, INC. 558   2024-01-11   
737-398 A Austin TX 6529 T-MOBILE USA, INC. 558   2024-11-16   
737-399 A Austin TX 6529 T-MOBILE USA, INC. 558   2024-11-28   
737-405 A Kyle TX 6529 T-MOBILE USA, INC. 558   2025-01-17   
737-414 A Buda TX 6529 T-MOBILE USA, INC. 558      
737-618 A Lampasas TX 6529 T-MOBILE USA, INC. 558      
737-708 A Austin TX 5562 METROPCS, INC. 558      
737-747 A Burnet TX 5562 METROPCS, INC. 558      

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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