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: 638

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
203-638 A Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 0 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 1 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 2 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 3 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 4 Trumbull CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920      
203-638 5 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 6 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 7 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      
203-638 8 Trumbull CT BLFDCTAP2MD  6624 OMNIPOINT COMMUNICATIONS, INC. - CT 920      
203-638 9 Trumbull CT SMFRCTATXMD  3083 PAETEC COMMUNICATIONS, LLC - CT 920      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.