Apparatus

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sensors Mode-S transponder

AE09D0

ICAO 24-bit transponder address

Hex
AE09D0
Octal
53404720
Decimal
11,405,776
Type
H60
No current signal · last broadcast Jul 20, 19:35 UTC
Flights observed
2
Distinct callsigns
2
Country
-
Last broadcast
Jul 20, 19:35 UTC

Last known position

Most recent position reported by Mode-S AE09D0.

Callsign history 2 distinct

Callsign Airline Flights Last seen
WATTS57 - 1 2026-07-20
WATTS48 - 1 2026-07-16

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-07-20 WATTS57 - Jul 20, 18:40 UTCJul 20, 19:35 UTC55m
2026-07-16 WATTS48 - Jul 16, 23:05 UTCJul 17, 00:20 UTC1h 15m

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.

Mode-S AE09D0 frequently asked

What is Mode-S code AE09D0?
AE09D0 is an ICAO 24-bit transponder address.
Is AE09D0 broadcasting right now?
No active broadcast right now. Last signal was Jul 20, 19:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE09D0, octal 53404720, decimal 11,405,776.
What flights does AE09D0 operate?
Mode-S AE09D0 has broadcast 2 distinct callsigns, including WATTS57, WATTS48.