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: 519

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-519 A Waterbury CT BLFDCTAP2MD  5562 METROPCS, INC. 920      
203-519 0 Waterbury CT   5562 METROPCS, INC. 920   2011-03-26   
203-519 1 Waterbury CT   5562 METROPCS, INC. 920   2011-03-26   
203-519 2 Waterbury CT   5562 METROPCS, INC. 920   2011-03-26   
203-519 3 Waterbury CT   5562 METROPCS, INC. 920   2011-03-26   
203-519 4 Waterbury CT   5562 METROPCS, INC. 920   2011-03-26   
203-519 5 Waterbury CT   5562 METROPCS, INC. 920   2011-03-26   
203-519 6 Waterbury CT   5562 METROPCS, INC. 920   2011-03-26   
203-519 7 Waterbury CT   350E YMAX COMMUNICATIONS CORP. - CT 920   2011-11-29   
203-519 8 Waterbury CT   350E YMAX COMMUNICATIONS CORP. - CT 920   2011-11-29   
203-519 9 Waterbury CT   6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920   2011-03-26   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.