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.

Ruby, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
936-563 A RUBYTXXADS0  2068 EASTEX TEL. COOP., INC. 560      

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.