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.
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Switch: AMRLTX02DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
806-220 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-320 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-337 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-342 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-345 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-349 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-371 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-372 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-373 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-374 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-376 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-378 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-379 A Amarillo TX 9533 SOUTHWESTERN BELL 546      
806-640 A Amarillo TX 9533 SOUTHWESTERN BELL 546      

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

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