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: 531

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-531 A Farmingdale NY FRDLNYFMRP0  9104 VERIZON NEW YORK, INC. 132      
631-531 0 Farmingdale NY FRDLNYFMRP0  9104 VERIZON NEW YORK, INC. 132      
631-531 1 Farmingdale NY FRDLNYFMRP0  9104 VERIZON NEW YORK, INC. 132      
631-531 2 Farmingdale NY FRDLNYFMRP0  9104 VERIZON NEW YORK, INC. 132   2005-06-11   
631-531 5 Farmingdale NY FRDLNYFMRP0  9104 VERIZON NEW YORK, INC. 132      
631-531 6 Farmingdale NY FRDLNYFMRP0  9104 VERIZON NEW YORK, INC. 132      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.