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.

Glen Burnie, MD

<< 1 2 3 4 5 6 7 8 9 10 11 12

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
667-527 0   490J DISH WIRELESS, LLC 238   2025-11-01   
667-527 1   490J DISH WIRELESS, LLC 238   2025-12-18   
667-527 2   490J DISH WIRELESS, LLC 238   2026-02-12   
667-527 3   490J DISH WIRELESS, LLC 238   2026-01-23   
667-527 4   490J DISH WIRELESS, LLC 238   2026-01-23   
667-527 5   490J DISH WIRELESS, LLC 238   2026-02-10   
667-527 6   490J DISH WIRELESS, LLC 238   2026-02-10   
667-527 7   490J DISH WIRELESS, LLC 238   2026-03-10   
667-527 8   876D ONVOY, LLC - MD 238   2026-01-04   
667-527 9   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2026-02-03   
667-967 A BLTQMD012MD  964H BARR TELL USA, INC. 238      
667-967 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2018-03-19   
667-967 1   964H BARR TELL USA, INC. 238   2017-01-21   
667-967 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-01-25   
667-967 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-01-25   
667-967 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-01-25   
667-967 5   5562 METROPCS, INC. 238   2017-03-05   
667-967 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-09-05   
667-967 7   073H TELNYX LLC 238   2017-03-14   
667-967 8   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-07-06   
667-967 9   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-09-05   

<< 1 2 3 4 5 6 7 8 9 10 11 12

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.