Apparatus

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sensors Mode-S transponder

AE1BFD

ICAO 24-bit transponder address

Currently assigned to 04-08704 · BOEING-VERTOL CH-47 Chinook

Hex
AE1BFD
Octal
53415775
Decimal
11,410,429
Tail
04-08704
Type
H47
No current signal · last broadcast 1d ago
Flights observed
13
Distinct callsigns
3
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE1BFD.

Callsign history 3 distinct

Callsign Airline Flights Last seen
STEEL85 - 6 2026-06-14
STEEL58 - 5 2026-06-18
STEEL59 - 2 2026-06-02

Recent flights last 13

DateFlightRouteTakeoffLandingDuration
2026-06-18 STEEL58 - Jun 18, 01:35 UTCJun 18, 01:45 UTC10m
2026-06-17 STEEL58 - Jun 17, 22:20 UTCJun 17, 23:05 UTC45m
2026-06-17 STEEL58 ANB → ANB Jun 17, 22:05 UTCJun 17, 22:10 UTC5m
2026-06-17 STEEL58 - Jun 17, 21:30 UTCJun 17, 22:00 UTC30m
2026-06-14 STEEL85 - Jun 14, 18:20 UTCJun 14, 18:30 UTC10m
2026-06-14 STEEL85 - Jun 14, 16:50 UTCJun 14, 17:45 UTC55m
2026-06-14 STEEL85 - Jun 14, 11:50 UTCJun 14, 13:15 UTC1h 25m
2026-06-10 STEEL85 - Jun 10, 18:55 UTCJun 10, 20:40 UTC1h 45m
2026-06-10 STEEL85 - Jun 10, 16:45 UTCJun 10, 17:00 UTC15m
2026-06-10 STEEL85 - Jun 10, 14:45 UTCJun 10, 15:40 UTC55m
2026-06-04 STEEL58 - Jun 4, 18:00 UTCJun 4, 18:35 UTC35m
2026-06-02 STEEL59 - Jun 2, 18:45 UTCJun 2, 20:20 UTC1h 35m
2026-06-02 STEEL59 - Jun 2, 14:30 UTCJun 2, 16:35 UTC2h 5m

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 04-08704 page for operator, model, and routing details .

Mode-S AE1BFD frequently asked

What is Mode-S code AE1BFD?
AE1BFD is an ICAO 24-bit transponder address. Assigned to 04-08704.
Is AE1BFD 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 AE1BFD, octal 53415775, decimal 11,410,429.
What flights does AE1BFD operate?
Mode-S AE1BFD has broadcast 3 distinct callsigns, including STEEL85, STEEL58, STEEL59.