For this type of aircraft owned, you can find it on this page.
A tail number refers to an identification number painted on an aircraft, frequently on the tail. In Indonesia, these are grouped based on the aircraft function and the type of aircraft. Among them are Fighters, Transports, helicopters, Trainers, and SAR. The composition of the tail number is Aircraft Function-two numbers ahead of the aircraft type and then followed the numbers sort (X-YYZZ). eg. Cargo owned by Indonesian Air Force (code: A), a type of aircraft is C-130 (code: 13), then the numbers of sort is 01, so the tail number is A-1301.
For more details the following is a list of aircraft type code:
|Indonesia Air Force||Reconnaissance||AI|
|Indonesia Air Force||Heli Trainer||HL|
|Indonesia Air Force||Heli Fighter||HT|
|Indonesia Air Force||Heli Cargo||H|
|Indonesia Air Force||Basic Trainer||LD|
|Indonesia Air Force||Advance Trainer||LL|
|Indonesia Air Force||Fighter Trainer||TL|
|Indonesia Air Force||Tactic Fighter||TT|
|Indonesia Air Force||Fighter||TS|
|Indonesia Naval Aviation||Cargo||U|
|Indonesia Naval Aviation||Reconnaissance||P|
|Indonesia Naval Aviation||Basic Trainer||L|
|Indonesia Naval Aviation||Heli Cargo||HU/NV|
|Indonesia Naval Aviation||Heli Fighter||HS|
|Indonesia Army Aviation||Cargo||A|
|Indonesia Army Aviation||Heli Cargo||HA|
|Indonesia Army Aviation||Heli Fighter||HS|
|Indonesia Search and Rescue||Heli SAR||HR|
|Indonesia Farmer Aviation||Single Propeller||ST|
When logon to IvAP you are prompted to enter the IVAP "callsign" and the above codes can be used in accordance with the aircraft that you are using. Then, what's code for each aircraft? As already described above, each aircraft having the code in accordance with the type of aircraft.