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: 353 [Rate centres in NPA 353] [Dial plan for NPA 353]

NXX: 201

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
353-201 A Madison WI   700J WAVENATION, LLC 354   2026-02-16   
353-201 0 Madison WI   700J WAVENATION, LLC 354   2026-02-16   
353-201 1 Madison WI   321J HD CARRIER LLC 354   2026-04-09   
353-201 2 Madison WI   321J HD CARRIER LLC 354   2026-04-09   
353-201 9 Madison WI   007F BANDWIDTH.COM CLEC, LLC - WI 354   2026-06-06   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.