Nassau County, NY General Frequencies COUNTY SHERIFF Trunked system: 861.1625 - 865.1625 MISCELLANEOUS COUNTY SERVICES Frequency Usage --------- ------------------------------------------------------------ 158.835 District Attorney F1 478.7125 District Attorney 453.325 Department of General Services 453.675 " " " " 453.875 Nassau County Medical Center (security) 453.750 Nassau County Medical Center 462.975 Nassau County Medical Center (Med Com) 453.225 Department of Parks and Recreation 453.150 Department of Public Works 453.325 " " " " 472.8125 Off-Track Betting Corporation 464.8625 Nassau Veterans Memorial Coliseum