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: 631 [Rate centres in NPA 631] [Dial plan for NPA 631]

NXX: 723

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-723 A Hampton Bays NY HMBYNYHBDS0  9104 VERIZON NEW YORK, INC. 132      
631-723 0 Hampton Bays NY   9104 VERIZON NEW YORK, INC. 132      
631-723 1 Hampton Bays NY   9104 VERIZON NEW YORK, INC. 132      
631-723 2 Hampton Bays NY   9104 VERIZON NEW YORK, INC. 132      
631-723 3 Hampton Bays NY   9104 VERIZON NEW YORK, INC. 132      
631-723 4 Hampton Bays NY   9104 VERIZON NEW YORK, INC. 132      
631-723 5 Hampton Bays NY   9104 VERIZON NEW YORK, INC. 132      
631-723 6 Hampton Bays NY   1215 CORETEL NEW YORK, INC. - NY 132   2019-04-01   
631-723 7 Hampton Bays NY   9104 VERIZON NEW YORK, INC. 132      
631-723 8 Hampton Bays NY   831C INTRADO COMMUNICATIONS, LLC 132   2016-09-02   
631-723 9 Hampton Bays NY   5562 METROPCS, INC. 132   2017-11-27   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.