Mode-S AE51E7 · Transponder Hex for 11-20405

Q: What is Mode-S code AE51E7?

AE51E7 is an ICAO 24-bit transponder address. Assigned to 11-20405 .

Last known position

Most recent position reported by Mode-S AE51E7.

Callsign history 2 distinct

Callsign	Airline	Flights	Last seen
AMPED10	-	2	2026-07-12
R20405	-	1	2026-07-22

Recent flights last 3

Date	Flight	Route	Takeoff	Landing	Duration
2026-07-22	R20405	FCS → FCS	Jul 22, 17:10 UTC	Jul 22, 17:30 UTC	20m
2026-07-12	AMPED10	-	Jul 12, 20:10 UTC	Jul 12, 20:30 UTC	20m
2026-07-12	AMPED10	-	Jul 12, 15:10 UTC	Jul 12, 15:20 UTC	10m

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 11-20405 page for operator, model, and routing details .

Mode-S AE51E7 frequently asked

What is Mode-S code AE51E7?

AE51E7 is an ICAO 24-bit transponder address. Assigned to 11-20405.

Is AE51E7 broadcasting right now?

No active broadcast right now. Last signal was 8d ago.

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

The same 24-bit identifier expressed in different bases: hex AE51E7, octal 53450747, decimal 11,424,231.

What flights does AE51E7 operate?

Mode-S AE51E7 has broadcast 2 distinct callsigns, including AMPED10, R20405.