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: WASHDC12MMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-266 2 Washington Zone 14 MD 516J TON80 COMMUNICATIONS, LLC 236   2021-06-10   
240-273 9 Washington Zone 6 MD 516J TON80 COMMUNICATIONS, LLC 236   2021-09-23   
240-331 2 Washington Zone 3 MD 516J TON80 COMMUNICATIONS, LLC 236   2021-10-28   
240-572 7 Leonardtown MD 516J TON80 COMMUNICATIONS, LLC 236   2021-10-15   
240-746 3 Brandywine MD 516J TON80 COMMUNICATIONS, LLC 236   2021-09-04   
240-768 6 Nanjemoy MD 516J TON80 COMMUNICATIONS, LLC 236   2021-10-07   
240-789 5 Washington Zone 10 MD 516J TON80 COMMUNICATIONS, LLC 236   2021-11-29   
240-798 4 Gaithersburg MD 516J TON80 COMMUNICATIONS, LLC 236   2021-11-01   
240-853 6 Laurel MD 516J TON80 COMMUNICATIONS, LLC 236   2021-11-30   
240-861 2 Ashton MD 516J TON80 COMMUNICATIONS, LLC 236   2021-11-22   
571-567 3 Washington Zone 19 VA 516J TON80 COMMUNICATIONS, LLC 236   2021-10-26   
571-574 7 Washington Zone 17 VA 516J TON80 COMMUNICATIONS, LLC 236   2021-10-20   
571-688 A Independent Hill VA 516J TON80 COMMUNICATIONS, LLC 236      
571-688 8 Independent Hill VA 516J TON80 COMMUNICATIONS, LLC 236   2022-04-20   
571-742 A Dulles Metro VA 516J TON80 COMMUNICATIONS, LLC 236      
571-742 6 Dulles Metro VA 516J TON80 COMMUNICATIONS, LLC 236   2022-04-22   
571-746 A Dulles VA 516J TON80 COMMUNICATIONS, LLC 236      
571-746 7 Dulles VA 516J TON80 COMMUNICATIONS, LLC 236   2022-04-20   
571-786 3 Herndon VA 516J TON80 COMMUNICATIONS, LLC 236   2021-09-04   
571-832 A Braddock VA 516J TON80 COMMUNICATIONS, LLC 236      
571-832 4 Braddock VA 516J TON80 COMMUNICATIONS, LLC 236   2022-04-20   
703-722 9 Arcola VA 516J TON80 COMMUNICATIONS, LLC 236   2021-10-28   
703-872 2 Washington Zone 8 VA 516J TON80 COMMUNICATIONS, LLC 236   2021-09-10   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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