Tech Oversight Project — Headquarters: Washington, DC

NoteThe source text explicitly states the organization's mailing address as 'PO Box 3010 Washington, DC 20010' in the footer section. Additionally, the organization describes itself as 'the only tech watchdog dedicated solely to research, rapid response, and aggressive media tactics that shape the debate around tech policy in Washington, D.C., and statehouses across the country,' indicating Washington, DC as its operational base. The claim that Tech Oversight Project's headquarters is in Washington, DC is confirmed by the address provided in the source.