| | | National Aeronautics and | +12023580001 | Mon-Fri: 9:00 AM - 5:00 PM | Space exploration, aeronautics research |
Food and Drug | +18884636332 | Mon-Fri: 8:00 AM - 4:30 PM | Food safety, drug regulation, medical devices |
Department of Homeland | +12022828000 | Mon-Fri: 9:00 AM - 5:00 PM | Border security, immigration, emergency response |
Federal Trade Commission | +18773824357 | Mon-Fri: 9:00 AM - 8:00 PM | Consumer protection, antitrust enforcement |
Social Security Administration | +18007721213 | Mon-Fri: 8:00 AM - 5:00 PM | Social Security benefits, Medicare, Disability claims |
Securities and Exchange | +18007320330 | Mon-Fri: 9:00 AM - 5:00 PM | Securities regulation, investor protection |
National Institutes of | +13014964000 | Mon-Fri: 8:30 AM - 5:00 PM | Biomedical research, medical studies |
Federal Bureau of | +18002255324 | 24/7 | Criminal investigations, national security |
Internal Revenue Service | +18008291040 | Mon-Fri: 7:00 AM - 7:00 PM | Tax information, refunds, filing assistance |
United States Department | +12027202791 | Mon-Fri: 8:00 AM - 4:30 PM | Agriculture policy, food safety, nutrition programs |
| | | |
United States Secret Service | +12024065708 | 24/7 | Presidential protection |
U.S. Postal Service (USPS) | +18002758777 | Mon-Fri: 8:00 AM - 8:00 PM | Mail services, postage, package tracking |
Department of Energy | +12025865000 | Mon-Fri: 8:00 AM - 5:00 PM | Energy policy, nuclear safety, research |
Federal Communications Commission | +18882255322 | Mon-Fri: 8:00 AM - 8:00 PM | Telecommunications regulation, spectrum management |