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: 203 [Rate centres in NPA 203] [Dial plan for NPA 203]

NXX: 613

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-613 A Norwalk CT BLFDCTAP2MD  5562 METROPCS, INC. 920   2024-02-09   
203-613 0 Norwalk CT   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 920   2014-06-13   
203-613 1 Norwalk CT   5562 METROPCS, INC. 920      
203-613 2 Norwalk CT   5562 METROPCS, INC. 920      
203-613 3 Norwalk CT   5562 METROPCS, INC. 920      
203-613 4 Norwalk CT   5562 METROPCS, INC. 920      
203-613 5 Norwalk CT   5562 METROPCS, INC. 920      
203-613 6 Norwalk CT   5562 METROPCS, INC. 920      
203-613 7 Norwalk CT   5562 METROPCS, INC. 920      
203-613 8 Norwalk CT   5562 METROPCS, INC. 920      
203-613 9 Norwalk CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.