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: WASHDC1224Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
202-490 2 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2026-07-03   
202-490 3 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2026-08-24   
202-490 4 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2026-09-28   
771-233 A Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236      
771-233 0 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2023-10-31   
771-233 9 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2023-08-04   
771-245 6 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2024-09-16   
771-245 7 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2024-10-28   
771-245 9 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2025-01-20   
771-254 4 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2025-09-12   
771-254 5 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2025-10-27   
771-254 8 Washington Zone 1 DC 490J BOOST SUBSCRIBERCO L.L.C. 236   2026-02-01   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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