| | | Department of Housing | +12027081112 | Mon-Fri: 8:00 AM - 8:00 PM | Housing assistance, community development |
National Institutes of | +13014964000 | Mon-Fri: 8:30 AM - 5:00 PM | Biomedical research, medical studies |
Federal Communications Commission | +18882255322 | Mon-Fri: 8:00 AM - 8:00 PM | Telecommunications regulation, spectrum management |
Federal Bureau of | +18002255324 | 24/7 | Criminal investigations, national security |
Bureau of Alcohol, | +18008003855 | Mon-Fri: 8:00 AM - 8:00 PM | Firearms regulation, explosives enforcement |
Centers for Disease | +18002324636 | 24/7 | Disease control, public health research |
| | | |
Securities and Exchange | +18007320330 | Mon-Fri: 9:00 AM - 5:00 PM | Securities regulation, investor protection |
U.S. Postal Service (USPS) | +18002758777 | Mon-Fri: 8:00 AM - 8:00 PM | Mail services, postage, package tracking |