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: SLBRMDSBWMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-434 A Federalsburg MD 073H TELNYX LLC 242      
443-434 1 Federalsburg MD 073H TELNYX LLC 242      
667-265 8 Vienna MD 073H TELNYX LLC 242      
667-302 A Cecilton MD 073H TELNYX LLC 242      
667-350 0 Wingate MD 073H TELNYX LLC 242      
667-526 0 Centreville MD 073H TELNYX LLC 242      
667-662 0 Smith Island MD 073H TELNYX LLC 242      
667-665 0 Hillsboro MD 073H TELNYX LLC 242      
667-676 0 Willards MD 073H TELNYX LLC 242      
667-767 7 St Michaels MD 073H TELNYX LLC 242      

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

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