Apparatus

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sensors Mode-S transponder

AE4B9A

ICAO 24-bit transponder address

Currently assigned to 164776 · SIKORSKY CH-53 Super Stallion

Hex
AE4B9A
Octal
53445632
Decimal
11,422,618
Tail
164776
Type
H53S
No current signal · last broadcast 1d ago
Flights observed
2
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE4B9A.

Callsign history 1 distinct

Callsign Airline Flights Last seen
TIGER01 - 2 2026-04-13

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-13 TIGER01 - Apr 13, 20:10 UTCApr 13, 21:05 UTC55m
2026-04-13 TIGER01 - Apr 13, 18:00 UTCApr 13, 18:20 UTC20m

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 164776 page for operator, model, and routing details .

Mode-S AE4B9A frequently asked

What is Mode-S code AE4B9A?
AE4B9A is an ICAO 24-bit transponder address. Assigned to 164776.
Is AE4B9A 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 AE4B9A, octal 53445632, decimal 11,422,618.
What flights does AE4B9A operate?
Mode-S AE4B9A has broadcast 1 distinct callsign, including TIGER01.