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.
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
667-758 1 Silver Run MD 624H ONVOY SPECTRUM, LLC 238   2022-03-06   
667-758 4 Silver Run MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-772 A Sparks-Glencoe MD 624H ONVOY SPECTRUM, LLC 238      
667-772 4 Sparks-Glencoe MD 624H ONVOY SPECTRUM, LLC 238   2022-03-10   
667-772 5 Sparks-Glencoe MD 624H ONVOY SPECTRUM, LLC 238   2022-03-10   
667-772 7 Sparks-Glencoe MD 624H ONVOY SPECTRUM, LLC 238   2021-06-27   
667-778 A Sparrows Point MD 624H ONVOY SPECTRUM, LLC 238      
667-778 6 Sparrows Point MD 624H ONVOY SPECTRUM, LLC 238   2022-02-03   
667-778 7 Sparrows Point MD 624H ONVOY SPECTRUM, LLC 238   2021-06-27   
667-778 8 Sparrows Point MD 624H ONVOY SPECTRUM, LLC 238   2022-02-03   
667-788 6 Westminster MD 624H ONVOY SPECTRUM, LLC 238   2022-01-15   
667-788 7 Westminster MD 624H ONVOY SPECTRUM, LLC 238   2022-01-15   
667-842 4 Woodlawn MD 624H ONVOY SPECTRUM, LLC 238   2022-01-28   
667-842 6 Woodlawn MD 624H ONVOY SPECTRUM, LLC 238   2022-01-28   
667-842 8 Woodlawn MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-848 1 Aberdeen MD 624H ONVOY SPECTRUM, LLC 236   2021-11-26   
667-848 9 Aberdeen MD 624H ONVOY SPECTRUM, LLC 236   2021-11-26   
667-887 1 Worthington MD 624H ONVOY SPECTRUM, LLC 238   2022-03-06   
667-887 2 Worthington MD 624H ONVOY SPECTRUM, LLC 238   2022-03-06   
667-887 7 Worthington MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-895 2 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2021-11-12   
667-962 4 North Beach MD 624H ONVOY SPECTRUM, LLC 238   2022-01-29   
667-962 5 North Beach MD 624H ONVOY SPECTRUM, LLC 238   2022-01-29   
667-962 7 North Beach MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-966 3 New Windsor MD 624H ONVOY SPECTRUM, LLC 238   2022-02-05   
667-966 4 New Windsor MD 624H ONVOY SPECTRUM, LLC 238   2022-02-05   
667-966 9 New Windsor MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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