Mode-S AED61D · Transponder Hex for 18-20980

Q: What is Mode-S code AED61D?

AED61D is an ICAO 24-bit transponder address. Assigned to 18-20980 .

Last known position

Most recent position reported by Mode-S AED61D.

Callsign history 2 distinct

Callsign	Airline	Flights	Last seen
KNIFE25	-	2	2026-04-15
G20980	-	1	2026-04-15

Recent flights last 3

Date	Flight	Route	Takeoff	Landing	Duration
2026-04-15	KNIFE25	-	Apr 15, 21:15 UTC	Apr 15, 21:45 UTC	30m
2026-04-15	KNIFE25	-	Apr 15, 17:05 UTC	Apr 15, 17:20 UTC	15m
2026-04-15	G20980	-	Apr 15, 01:30 UTC	Apr 15, 02:50 UTC	1h 20m

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 18-20980 page for operator, model, and routing details .

Mode-S AED61D frequently asked

What is Mode-S code AED61D?

AED61D is an ICAO 24-bit transponder address. Assigned to 18-20980.

Is AED61D broadcasting right now?

No active broadcast right now. Last signal was 3d ago.

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

The same 24-bit identifier expressed in different bases: hex AED61D, octal 53553035, decimal 11,458,077.

What flights does AED61D operate?

Mode-S AED61D has broadcast 2 distinct callsigns, including KNIFE25, G20980.