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: 217

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-217 A McAllen TX MCALTXMUDS0  9533 SOUTHWESTERN BELL 568      
956-217 0 McAllen TX   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2008-02-24   
956-217 1 McAllen TX   145J TERRA NOVA TELECOM INC. 568   2024-11-10   
956-217 2 McAllen TX   903C ONVOY, LLC - TX 568   2025-01-06   
956-217 3 McAllen TX   9533 SOUTHWESTERN BELL 568   2006-12-08   
956-217 4 McAllen TX   679E TRANSTELCO, INC. - TX 568   2019-07-26   
956-217 5 McAllen TX   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 568   2014-05-09   
956-217 6 McAllen TX   9533 SOUTHWESTERN BELL 568   2006-12-08   
956-217 7 McAllen TX   9533 SOUTHWESTERN BELL 568   2006-12-08   
956-217 8 McAllen TX   7421 AT&T - LOCAL 568   2009-04-06   
956-217 9 McAllen TX   4290 STPCS JOINT VENTURE, LLC 568   2015-01-04   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.