| | | Federal Bureau of | +18002255324 | 24/7 | Criminal investigations, national security |
Federal Communications Commission | +18882255322 | Mon-Fri: 8:00 AM - 8:00 PM | Telecommunications regulation, spectrum management |
Social Security Administration | +18007721213 | Mon-Fri: 8:00 AM - 5:00 PM | Social Security benefits, Medicare, Disability claims |
National Park Service | +12022086843 | Mon-Fri: 9:00 AM - 5:00 PM | National parks management, conservation |
Department of Homeland | +12022828000 | Mon-Fri: 9:00 AM - 5:00 PM | Border security, immigration, emergency response |
Internal Revenue Service | +18008291040 | Mon-Fri: 7:00 AM - 7:00 PM | Tax information, refunds, filing assistance |
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 |
Federal Aviation Administration | +18668355322 | Mon-Fri: 8:00 AM - 4:30 PM | Aviation safety, air traffic control |
Federal Deposit Insurance | +18772753342 | Mon-Fri: 8:00 AM - 8:00 PM | Deposit insurance, banking regulation |
Centers for Disease | +18002324636 | 24/7 | Disease control, public health research |