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: GRBYTXRADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
817-279 A Granbury EMS TX 9533 SOUTHWESTERN BELL 552      
817-408 A Granbury TX 9533 SOUTHWESTERN BELL 552      
817-573 A Granbury TX 9533 SOUTHWESTERN BELL 552      
817-578 A Granbury EMS TX 9533 SOUTHWESTERN BELL 552      
817-579 A Granbury TX 9533 SOUTHWESTERN BELL 552      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.