Mode-S AE03F9 · Transponder Hex for 84-00173

Q: What is Mode-S code AE03F9?

AE03F9 is an ICAO 24-bit transponder address. Assigned to 84-00173 .

Last known position

Most recent position reported by Mode-S AE03F9.

Callsign history 1 distinct

Callsign	Airline	Flights	Last seen
DUKE28	-	4	2026-04-14

Recent flights last 4

Date	Flight	Route	Takeoff	Landing	Duration
2026-04-14	DUKE28	-	Apr 14, 09:10 UTC	Apr 14, 10:55 UTC	1h 45m
2026-04-14	DUKE28	-	Apr 14, 08:30 UTC	Apr 14, 09:05 UTC	35m
2026-04-14	DUKE28	-	Apr 14, 07:10 UTC	Apr 14, 07:35 UTC	25m
2026-04-14	DUKE28	-	Apr 14, 05:15 UTC	Apr 14, 07:10 UTC	1h 55m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the 84-00173 page for operator, model, and routing details .

Mode-S AE03F9 frequently asked

What is Mode-S code AE03F9?

AE03F9 is an ICAO 24-bit transponder address. Assigned to 84-00173.

Is AE03F9 broadcasting right now?

Mode-S AE03F9 is currently broadcasting from the ground.

Hex, octal, and decimal Mode-S codes: what's the difference?

The same 24-bit identifier expressed in different bases: hex AE03F9, octal 53401771, decimal 11,404,281.

What flights does AE03F9 operate?

Mode-S AE03F9 has broadcast 1 distinct callsign, including DUKE28.