Mode S transponder codes

Aircraft with Mode S transponder equipment installed must have a unique Mode S address code assigned to them.

To find out the code (binary) for an aircraft, search for it on the Aircraft Register page.

The Mode S information displayed for a particular aircraft follows this format:

• First line shows the binary country code for New Zealand.
• Second line shows the unique binary aircraft code.
• Third line shows the equivalent hexadecimal code.

Rule 91.247 Use of transponder and altitude reporting equipment

AC91-2 Assignment of mode S address