Apparatus

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sensors Mode-S transponder

AE291A

ICAO 24-bit transponder address

Currently assigned to 6043 · Sikorsky MH-60T Jayhawk

Hex
AE291A
Octal
53424432
Decimal
11,413,786
Tail
6043
Type
H60
No current signal · last broadcast 1d ago
Flights observed
1
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE291A.

Callsign history 1 distinct

Callsign Airline Flights Last seen
C6043 - 1 2026-04-13

Recent flights last 1

DateFlightRouteTakeoffLandingDuration
2026-04-13 C6043 ADQ → ADQ Apr 13, 20:35 UTCApr 13, 22:20 UTC1h 45m

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 6043 page for operator, model, and routing details .

Mode-S AE291A frequently asked

What is Mode-S code AE291A?
AE291A is an ICAO 24-bit transponder address. Assigned to 6043.
Is AE291A 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 AE291A, octal 53424432, decimal 11,413,786.
What flights does AE291A operate?
Mode-S AE291A has broadcast 1 distinct callsign, including C6043.