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: BLTQMD018MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-538 9 Fork MD 145J TERRA NOVA TELECOM INC. 238   2026-01-04   
443-404 2 Solomons MD 145J TERRA NOVA TELECOM INC. 238   2026-07-04   
443-581 4 Chase MD 145J TERRA NOVA TELECOM INC. 238   2026-07-04   
443-587 3 Edgewood MD 145J TERRA NOVA TELECOM INC. 238   2026-01-04   
443-971 2 Taneytown MD 145J TERRA NOVA TELECOM INC. 238   2026-01-04   
443-981 6 Fallston MD 145J TERRA NOVA TELECOM INC. 238   2026-01-04   
667-535 5 Rising Sun MD 145J TERRA NOVA TELECOM INC. 238   2026-02-06   
667-900 A Baltimore MD 145J TERRA NOVA TELECOM INC. 238      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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