Apparatus

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sensors Mode-S transponder

AE4FDE

ICAO 24-bit transponder address

Currently assigned to 168142 · SIKORSKY UH-60 Black Hawk

Hex
AE4FDE
Octal
53447736
Decimal
11,423,710
Tail
168142
Type
H60
No current signal · last broadcast 1h ago
Flights observed
16
Distinct callsigns
2
Country
-
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AE4FDE.

Callsign history 2 distinct

Callsign Airline Flights Last seen
WL01 - 11 2026-07-09
FFAB123 - 5 2026-07-14

Recent flights last 16

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFAB123 - Jul 14, 08:10 UTCJul 14, 09:55 UTC1h 45m
2026-07-14 FFAB123 - Jul 14, 06:00 UTCJul 14, 07:20 UTC1h 20m
2026-07-14 FFAB123 - Jul 14, 04:40 UTCJul 14, 05:10 UTC30m
2026-07-14 FFAB123 - Jul 14, 01:45 UTCJul 14, 03:55 UTC2h 10m
2026-07-14 FFAB123 - Jul 14, 01:25 UTCJul 14, 01:40 UTC15m
2026-07-09 WL01 - Jul 9, 10:15 UTCJul 9, 13:00 UTC2h 45m
2026-07-09 WL01 - Jul 9, 07:55 UTCJul 9, 09:20 UTC1h 25m
2026-07-09 WL01 - Jul 9, 06:30 UTCJul 9, 07:20 UTC50m
2026-07-09 WL01 - Jul 9, 04:35 UTCJul 9, 05:25 UTC50m
2026-07-09 WL01 - Jul 9, 03:15 UTCJul 9, 04:00 UTC45m
2026-07-09 WL01 - Jul 9, 01:05 UTCJul 9, 02:15 UTC1h 10m
2026-07-07 WL01 - Jul 7, 09:05 UTCJul 7, 11:55 UTC2h 50m
2026-07-07 WL01 - Jul 7, 07:55 UTCJul 7, 08:20 UTC25m
2026-07-07 WL01 - Jul 7, 05:25 UTCJul 7, 06:25 UTC1h 0m
2026-06-24 WL01 - Jun 24, 08:30 UTCJun 24, 09:00 UTC30m
2026-06-24 WL01 - Jun 24, 04:34 UTCJun 24, 05:54 UTC1h 20m

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 168142 page for operator, model, and routing details .

Mode-S AE4FDE frequently asked

What is Mode-S code AE4FDE?
AE4FDE is an ICAO 24-bit transponder address. Assigned to 168142.
Is AE4FDE broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE4FDE, octal 53447736, decimal 11,423,710.
What flights does AE4FDE operate?
Mode-S AE4FDE has broadcast 2 distinct callsigns, including WL01, FFAB123.