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: 306

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
838-306 A Amsterdam NY   384C ONVOY, LLC- NY 134   2026-06-06   
838-306 0 Amsterdam NY   384C ONVOY, LLC- NY 134   2026-06-06   
838-306 1 Amsterdam NY   155E PEERLESS NETWORK OF NEW YORK, LLC - NY 134   2026-06-08   

Last updated: Sun, 17 May 2026 03:26:51 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.