Apparatus

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sensors Mode-S transponder

AE5D36

ICAO 24-bit transponder address

Currently assigned to 16-20813 · SIKORSKY UH-60 Black Hawk

Hex
AE5D36
Octal
53456466
Decimal
11,427,126
Tail
16-20813
Type
H60
No current signal · last broadcast Jul 26, 16:15 UTC
Flights observed
4
Distinct callsigns
2
Country
-
Last broadcast
Jul 26, 16:15 UTC

Last known position

Most recent position reported by Mode-S AE5D36.

Callsign history 2 distinct

Callsign Airline Flights Last seen
R20813 - 3 2026-07-03
R20809 - 1 2026-07-26

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-07-26 R20809 - Jul 26, 15:15 UTCJul 26, 16:15 UTC1h 0m
2026-07-03 R20813 - Jul 3, 05:25 UTCJul 3, 05:40 UTC15m
2026-07-03 R20813 - Jul 3, 04:40 UTCJul 3, 05:20 UTC40m
2026-07-03 R20813 - Jul 3, 02:15 UTCJul 3, 03:05 UTC50m

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 16-20813 page for operator, model, and routing details .

Mode-S AE5D36 frequently asked

What is Mode-S code AE5D36?
AE5D36 is an ICAO 24-bit transponder address. Assigned to 16-20813.
Is AE5D36 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE5D36, octal 53456466, decimal 11,427,126.
What flights does AE5D36 operate?
Mode-S AE5D36 has broadcast 2 distinct callsigns, including R20813, R20809.