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: 712 [Rate centres in NPA 712] [Dial plan for NPA 712]

NXX: 514

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
712-514 A Spencer IA   6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 630      
712-514 0 Spencer IA   6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 630   2025-12-05   
712-514 7 Spencer IA SXCYIADTCMD  6570 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 630   2024-10-07   
712-514 9 Spencer IA SXCYIADTYMD  321J HD CARRIER LLC 630   2019-12-26   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.