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: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-438 A Pharr TX HRLNTXKX8MD  5562 METROPCS, INC. 568      
956-438 0 Pharr TX   5562 METROPCS, INC. 568   2014-02-27   
956-438 1 Pharr TX   5562 METROPCS, INC. 568   2014-02-27   
956-438 2 Pharr TX   5562 METROPCS, INC. 568   2014-02-03   
956-438 3 Pharr TX   5562 METROPCS, INC. 568   2014-02-27   
956-438 4 Pharr TX   5562 METROPCS, INC. 568   2014-02-27   
956-438 5 Pharr TX   5562 METROPCS, INC. 568   2014-02-27   
956-438 6 Pharr TX   5562 METROPCS, INC. 568   2014-02-27   
956-438 7 Pharr TX   145J TERRA NOVA TELECOM INC. 568   2024-04-23   
956-438 8 Pharr TX   5562 METROPCS, INC. 568   2014-09-21   
956-438 9 Pharr TX   5562 METROPCS, INC. 568   2014-10-01   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.