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: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 264

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-264 A Delmar MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242      
667-264 0 Delmar MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2023-01-11   
667-264 1 Delmar MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2021-04-02   
667-264 2 Delmar MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-22   
667-264 3 Delmar MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2019-04-29   
667-264 4 Delmar MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-22   
667-264 5 Delmar MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-22   
667-264 6 Delmar MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-22   
667-264 7 Delmar MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-22   
667-264 8 Delmar MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-22   
667-264 9 Delmar MD SLBRMDSBX0X  624H ONVOY SPECTRUM, LLC 242   2021-05-27   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.