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: AMRLTXEVDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
806-381 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 0 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 1 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 2 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 4 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 5 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 6 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 7 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 8 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-381 9 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 0 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 1 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 2 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 3 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 4 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 6 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 7 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 8 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-383 9 Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-626 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-626 0 Amarillo TX 9533 SOUTHWESTERN BELL 546      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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