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: BLTMMDCH42Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-570 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      
443-241 A Westminster MD 876D ONVOY, LLC - MD 238      
443-453 A Baltimore 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      
443-785 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      
667-444 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-677 A Baltimore MD 876D ONVOY, LLC - MD 238      
667-999 A Elkridge MD 876D ONVOY, LLC - MD 238      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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