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:
Rule 91.247 Use of transponder and altitude reporting equipment
If you have any questions about this topic, use our contact form, or email aircraftregistrar@caa.govt.nz