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: SLBRMDSBXMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-746 9 Easton MD 073H TELNYX LLC 242   2022-08-01   
667-316 A Oxford MD 073H TELNYX LLC 242      
667-316 0 Oxford MD 073H TELNYX LLC 242   2021-06-08   
667-323 9 Queenstown MD 073H TELNYX LLC 242   2022-03-10   
667-349 0 Still Pond MD 073H TELNYX LLC 242   2022-06-06   
667-357 9 Greensboro MD 073H TELNYX LLC 242   2022-04-22   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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