Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-781 2 Armiger-Gibson Island MD 624H ONVOY SPECTRUM, LLC 238   2022-02-11   
443-830 9 Catonsville MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-869 7 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2024-10-23   
443-890 2 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2024-10-23   
443-899 0 Waterloo MD 624H ONVOY SPECTRUM, LLC 238   2021-11-26   
443-899 2 Waterloo MD 624H ONVOY SPECTRUM, LLC 238   2021-06-26   
443-916 6 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2024-10-23   
443-987 9 Bel Air MD 624H ONVOY SPECTRUM, LLC 238   2022-01-15   
667-215 2 Elkton MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
667-250 A Baltimore MD 624H ONVOY SPECTRUM, LLC 238      
667-250 6 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2018-07-30   
667-262 A Baltimore MD 624H ONVOY SPECTRUM, LLC 238      
667-262 3 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2020-07-08   
667-262 4 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2020-07-08   
667-262 8 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2020-07-08   
667-263 7 Dundalk MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
667-268 3 Darlington MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
667-268 5 Darlington MD 624H ONVOY SPECTRUM, LLC 238   2021-11-15   
667-268 6 Darlington MD 624H ONVOY SPECTRUM, LLC 238   2021-11-15   
667-272 1 Westminster MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-273 6 Pikesville MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-274 6 Elkridge MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
667-280 1 Ellicott City MD 624H ONVOY SPECTRUM, LLC 238   2021-11-20   
667-280 8 Ellicott City MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
667-283 6 Fork MD 624H ONVOY SPECTRUM, LLC 238   2022-01-20   
667-283 7 Fork MD 624H ONVOY SPECTRUM, LLC 238   2022-01-20   
667-284 7 Baltimore MD 624H ONVOY SPECTRUM, LLC 238   2021-11-12   
667-294 1 Towson MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-298 4 Aberdeen MD 624H ONVOY SPECTRUM, LLC 236   2021-05-22   
667-301 1 Prince Frederick MD 624H ONVOY SPECTRUM, LLC 238   2022-01-15   
667-301 4 Prince Frederick MD 624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-301 9 Prince Frederick MD 624H ONVOY SPECTRUM, LLC 238   2022-01-15   
667-304 3 Essex MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
667-310 3 Parkville MD 624H ONVOY SPECTRUM, LLC 238   2021-05-29   
667-315 2 Bel Air MD 624H ONVOY SPECTRUM, LLC 238   2022-01-15   
667-315 3 Bel Air MD 624H ONVOY SPECTRUM, LLC 238   2021-06-13   
667-318 6 Cockeysville MD 624H ONVOY SPECTRUM, LLC 238   2021-10-10   
667-318 8 Cockeysville MD 624H ONVOY SPECTRUM, LLC 238   2021-09-10   
667-324 0 Randallstown MD 624H ONVOY SPECTRUM, LLC 238   2022-02-12   
667-324 1 Randallstown MD 624H ONVOY SPECTRUM, LLC 238   2022-02-12   
667-324 4 Randallstown MD 624H ONVOY SPECTRUM, LLC 238   2021-09-10   
667-324 6 Randallstown MD 624H ONVOY SPECTRUM, LLC 238   2021-10-21   
667-328 4 Essex MD 624H ONVOY SPECTRUM, LLC 238   2022-01-15   
667-329 6 Parkton MD 624H ONVOY SPECTRUM, LLC 238   2022-02-04   
667-329 7 Parkton MD 624H ONVOY SPECTRUM, LLC 238   2022-02-04   
667-333 8 Armiger-Gibson Island MD 624H ONVOY SPECTRUM, LLC 238   2021-05-22   
667-338 6 Crofton MD 624H ONVOY SPECTRUM, LLC 238   2022-02-12   
667-338 7 Crofton MD 624H ONVOY SPECTRUM, LLC 238   2022-02-12   
667-338 8 Crofton MD 624H ONVOY SPECTRUM, LLC 238   2021-11-01   
667-339 0 Sykesville MD 624H ONVOY SPECTRUM, LLC 238   2021-11-26   

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

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