Apparatus

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sensors Mode-S transponder

AE53A5

ICAO 24-bit transponder address

Currently assigned to 11-20347 · SIKORSKY UH-60 Black Hawk

Hex
AE53A5
Octal
53451645
Decimal
11,424,677
Tail
11-20347
Type
H60
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 AE53A5.

Callsign history 1 distinct

Callsign Airline Flights Last seen
MAZER93 - 2 2026-04-13

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-13 MAZER93 - Apr 13, 20:50 UTCApr 13, 21:00 UTC10m
2026-04-13 MAZER93 - Apr 13, 17:05 UTCApr 13, 17:20 UTC15m

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 11-20347 page for operator, model, and routing details .

Mode-S AE53A5 frequently asked

What is Mode-S code AE53A5?
AE53A5 is an ICAO 24-bit transponder address. Assigned to 11-20347.
Is AE53A5 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 AE53A5, octal 53451645, decimal 11,424,677.
What flights does AE53A5 operate?
Mode-S AE53A5 has broadcast 1 distinct callsign, including MAZER93.