No, their assigned callsign is a personal callsign.* After the letter or letters come four numbers.* The first number deals with the rank (2xxx Captain, 3xxx Lt, 4xxx Sgt, 5-6xxx DPS Officer I or II).* The next three numbers were assigned a year or two ago and were issued in order of the officer's last name.Thus one can promote and the last three numbers stay the same with only the first number changing.This holds true even if the officer is transferred to a different division of the NV Dept of Public Safety.This does happen.* The three divisions that generate most of the DPS radio traffic are the Divison of Highway Patrol, the Division of Parole & Probation (Yes they are sworn officers, some with uniforms, and armed.), and the Division of Investigations (much smaller than the first two divisions).In Nevada the NHP operates only three dispatch centers which cover the entire state.Hope this answers your question and provides some additional information.