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.

Switch: WASHDC12KMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
227-777 2 Ashton (Baltimore LATA) MD 145J TERRA NOVA TELECOM INC. 238      
240-262 2 Lexington Park-Great Mills MD 145J TERRA NOVA TELECOM INC. 236      
240-269 0 Washington Zone 16 MD 145J TERRA NOVA TELECOM INC. 236      
240-290 7 Washington Zone 11 MD 145J TERRA NOVA TELECOM INC. 236      
240-337 1 Washington Zone 5 MD 145J TERRA NOVA TELECOM INC. 236      
240-427 0 Waldorf MD 145J TERRA NOVA TELECOM INC. 236      
240-744 8 Washington Zone 2 MD 145J TERRA NOVA TELECOM INC. 236      
240-892 0 Washington Zone 15 MD 145J TERRA NOVA TELECOM INC. 236      
240-898 9 Washington Zone 4 MD 145J TERRA NOVA TELECOM INC. 236      
301-397 9 Washington Zone 13 MD 145J TERRA NOVA TELECOM INC. 236      
571-400 A Washington Zone 8 VA 145J TERRA NOVA TELECOM INC. 236      
571-600 A Dulles Metro VA 145J TERRA NOVA TELECOM INC. 236      
703-672 4 Lorton VA 145J TERRA NOVA TELECOM INC. 236      
771-222 A Washington Zone 1 DC 145J TERRA NOVA TELECOM INC. 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.