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: AMRLTXDIRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
806-335 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-335 1 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-335 2 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-335 3 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-335 4 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-335 7 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-335 9 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-341 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-341 3 Amarillo TX 9533 SOUTHWESTERN BELL 546      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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