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.

Sylvester, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
325-993 A SYLVTXXADS0  2090 ALENCO COMMUNICATIONS, INC. 550      

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.