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: 458 [Rate centres in NPA 458] [Dial plan for NPA 458]

NXX: 357

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
458-357 A Madras OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672   2026-01-03   
458-357 0 Madras OR BENDOR248MD  6010 NEW CINGULAR WIRELESS PCS, LLC 672   2026-07-10   
458-357 8 Madras OR PTLDORWADS2  750E ONVOY, LLC - OR 672   2026-05-30   
458-357 9 Madras OR PTLJORIY0MD  6529 T-MOBILE USA, INC. 672   2026-01-03   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.