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.

NPA: 838 [Rate centres in NPA 838] [Dial plan for NPA 838]

NXX: 621

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
838-621 A Schenectady NY   977K YORKSTREAM COMMUNICATIONS LLC 134   2025-12-28   
838-621 6 Schenectady NY   977K YORKSTREAM COMMUNICATIONS LLC 134   2025-12-28   
838-621 8 Schenectady NY   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 134   2026-01-16   
838-621 9 Schenectady NY   977K YORKSTREAM COMMUNICATIONS LLC 134   2025-12-28   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.