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: 356

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-356 A Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-356 0 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-05-24   
667-356 1 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-07-13   
667-356 2 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-07-13   
667-356 3 Severn MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-356 4 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-12   
667-356 5 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-12   
667-356 6 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-25   
667-356 7 Severn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-22   
667-356 8 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-10-17   
667-356 9 Severn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-10-17   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.