United States Marshals Service
From The RadioReference Wiki
163.200 CH 1 Repeater
163.200 CH 2 Simplex
164.600 CH 3 Repeater
164.600 CH 4 Simplex
- Tones vary in different areas
- According to the IWN OIG REPORT The USMS primarily uses the FBI’s systems for its radio communications.
- Also see http://www.usmarshals.gov/