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.

Washington Zone 16, MD

<< 1 2 3

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-888 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-08-13   
301-888 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-28   
301-888 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-27   
301-888 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-27   
301-888 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-28   
301-888 8 WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2012-04-02   
301-888 9 BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      

<< 1 2 3

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.