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.

NPA: 417 [Rate centres in NPA 417] [Dial plan for NPA 417]

NXX: 539

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-539 A Houston MO   5562 METROPCS, INC. 522   2025-05-08   
417-539 0 Houston MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 522   2025-05-11   
417-539 7 Houston MO   6701 AERIAL COMMUNICATIONS, INC. 522   2025-05-09   
417-539 9 Houston MO   5562 METROPCS, INC. 522   2025-05-08   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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