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: 283 [Rate centres in NPA 283] [Dial plan for NPA 283]

NXX: 212

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
283-212 A Hamilton OH CNCNOHRE2MD  464C ONVOY, LLC - OH 922      
283-212 0 Hamilton OH CNCNOHAMGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 922   2023-11-03   
283-212 1 Hamilton OH CNCNOHAMGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 922   2023-11-03   
283-212 2 Hamilton OH CNCNOHRE2MD  464C ONVOY, LLC - OH 922   2023-10-28   
283-212 3 Hamilton OH   145J TERRA NOVA TELECOM INC. 922   2025-08-25   
283-212 4 Hamilton OH CNCNOHFBAMD  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 922   2023-11-15   
283-212 5 Hamilton OH CNCNOHFBAMD  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 922   2023-12-19   
283-212 6 Hamilton OH CNCNOHFBAMD  6025 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 922   2023-12-19   
283-212 7 Hamilton OH CNCNOHRE2MD  464C ONVOY, LLC - OH 922   2024-02-04   
283-212 8 Hamilton OH CNCNOHWSX8Z  624H ONVOY SPECTRUM, LLC 922   2023-11-29   
283-212 9 Hamilton OH CNCNOHWSX8Z  624H ONVOY SPECTRUM, LLC 922   2023-11-29   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.