Mode-S AE63F4 · Transponder Hex for 68-8154

Q: What is Mode-S code AE63F4?

AE63F4 is an ICAO 24-bit transponder address. Assigned to 68-8154 .

Last known position

Most recent position reported by Mode-S AE63F4.

Callsign history 2 distinct

Callsign	Airline	Flights	Last seen
PA01	-	2	2026-04-13
RR04	-	1	2026-04-13

Recent flights last 3

Date	Flight	Route	Takeoff	Landing	Duration
2026-04-13	RR04	-	Apr 13, 21:10 UTC	Apr 13, 22:15 UTC	1h 5m
2026-04-13	PA01	-	Apr 13, 15:50 UTC	Apr 13, 16:15 UTC	25m
2026-04-13	PA01	FAF → LFI	Apr 13, 15:20 UTC	Apr 13, 16:15 UTC	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 68-8154 page for operator, model, and routing details .

Mode-S AE63F4 frequently asked

What is Mode-S code AE63F4?

AE63F4 is an ICAO 24-bit transponder address. Assigned to 68-8154.

Is AE63F4 broadcasting right now?

No active broadcast right now. Last signal was 1d ago.

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

The same 24-bit identifier expressed in different bases: hex AE63F4, octal 53461764, decimal 11,428,852.

What flights does AE63F4 operate?

Mode-S AE63F4 has broadcast 2 distinct callsigns, including PA01, RR04.