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: BLTMMDCHXMX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
667-299 5 Annapolis MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-321 2 Prince Frederick MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-353 3 Cardiff MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-399 3 Union Bridge MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-577 5 Elkton MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-688 7 Parkville MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-758 7 Silver Run MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-842 2 Woodlawn MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-895 A Baltimore MD 506J TWILIO INTERNATIONAL, INC. 238      
667-895 8 Baltimore MD 506J TWILIO INTERNATIONAL, INC. 238   2020-12-13   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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