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
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