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

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-998 3 Parkville MD 145J TERRA NOVA TELECOM INC. 238   2024-02-15   
667-314 7 Westminster MD 145J TERRA NOVA TELECOM INC. 238   2024-02-15   
667-333 2 Armiger-Gibson Island MD 145J TERRA NOVA TELECOM INC. 238   2021-01-27   
667-458 8 Annapolis MD 145J TERRA NOVA TELECOM INC. 238   2024-05-25   
667-803 6 Solomons MD 145J TERRA NOVA TELECOM INC. 238   2024-09-12   
667-803 7 Solomons MD 145J TERRA NOVA TELECOM INC. 238   2024-02-15   
667-900 A Baltimore MD 145J TERRA NOVA TELECOM INC. 238      

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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