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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Switch: BLTMMDCH42Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
227-260 A Washington Zone 15 (Baltimore LATA) MD 876D ONVOY, LLC - MD 238   2025-01-11   
240-570 A Ashton (Baltimore LATA) MD 876D ONVOY, LLC - MD 238      
240-759 A Washington Zone 15 (Baltimore LATA) MD 876D ONVOY, LLC - MD 238      
240-820 A Ashton (Baltimore LATA) MD 876D ONVOY, LLC - MD 238      
240-859 A Ashton (Baltimore LATA) MD 876D ONVOY, LLC - MD 238      
301-329 A Ashton (Baltimore LATA) MD 876D ONVOY, LLC - MD 238      
410-826 A Baltimore MD 876D ONVOY, LLC - MD 238      
443-222 A Worthington MD 876D ONVOY, LLC - MD 238      
443-241 A Westminster MD 876D ONVOY, LLC - MD 238      
443-251 A Catonsville MD 876D ONVOY, LLC - MD 238      
443-453 A Baltimore MD 876D ONVOY, LLC - MD 238      
443-581 A Chase MD 876D ONVOY, LLC - MD 238      
443-658 A Woodlawn MD 876D ONVOY, LLC - MD 238      
443-659 A West River MD 876D ONVOY, LLC - MD 238      
443-781 A Armiger-Gibson Island MD 876D ONVOY, LLC - MD 238   2024-03-05   
443-785 A Arbutus MD 876D ONVOY, LLC - MD 238      
443-873 A Baltimore MD 876D ONVOY, LLC - MD 238      
443-917 A Columbia MD 876D ONVOY, LLC - MD 238      
667-200 A Columbia MD 876D ONVOY, LLC - MD 238      
667-202 A Elkton MD 876D ONVOY, LLC - MD 238      
667-222 A Armiger-Gibson Island MD 876D ONVOY, LLC - MD 238      
667-260 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-309 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-338 A Crofton MD 876D ONVOY, LLC - MD 238      
667-339 A Sykesville MD 876D ONVOY, LLC - MD 238      
667-340 A Churchville MD 876D ONVOY, LLC - MD 238      
667-356 A Severn MD 876D ONVOY, LLC - MD 238      
667-360 A Odenton MD 876D ONVOY, LLC - MD 238      
667-363 A Sherwood Forest MD 876D ONVOY, LLC - MD 238      
667-370 A Parkton MD 876D ONVOY, LLC - MD 238      
667-380 A Annapolis MD 876D ONVOY, LLC - MD 238      
667-387 A Perryville MD 876D ONVOY, LLC - MD 238      
667-396 A Port Deposit MD 876D ONVOY, LLC - MD 238      
667-397 A Solomons MD 876D ONVOY, LLC - MD 238      
667-403 A Towson MD 876D ONVOY, LLC - MD 238      
667-407 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-426 A Taneytown MD 876D ONVOY, LLC - MD 238      
667-427 A West River MD 876D ONVOY, LLC - MD 238      
667-435 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-440 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-444 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-469 A Bel Air MD 876D ONVOY, LLC - MD 238   2024-04-04   
667-474 A Armiger-Gibson Island MD 876D ONVOY, LLC - MD 238   2024-05-11   
667-475 A Crofton MD 876D ONVOY, LLC - MD 238   2024-05-12   
667-476 A Glenwood MD 876D ONVOY, LLC - MD 238      
667-477 A Hampstead MD 876D ONVOY, LLC - MD 238      
667-478 A Sykesville MD 876D ONVOY, LLC - MD 238   2024-05-12   
667-479 A Ellicott City MD 876D ONVOY, LLC - MD 238   2024-05-12   
667-489 A Hampstead MD 876D ONVOY, LLC - MD 238   2024-08-04   
667-567 A Havre de Grace MD 876D ONVOY, LLC - MD 238      
667-576 A Jarrettsville MD 876D ONVOY, LLC - MD 238      
667-657 A Chase MD 876D ONVOY, LLC - MD 238      
667-666 A West River MD 876D ONVOY, LLC - MD 238      
667-677 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-678 A Columbia MD 876D ONVOY, LLC - MD 238      
667-887 A Worthington MD 876D ONVOY, LLC - MD 238      
667-888 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-910 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-962 A North Beach MD 876D ONVOY, LLC - MD 238      
667-966 A New Windsor MD 876D ONVOY, LLC - MD 238      
667-999 A Elkridge MD 876D ONVOY, LLC - MD 238      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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