Apparatus

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sensors Mode-S transponder

AE51C3

ICAO 24-bit transponder address

Currently assigned to 11-20396 · SIKORSKY UH-60 Black Hawk

Hex
AE51C3
Octal
53450703
Decimal
11,424,195
Tail
11-20396
Type
H60
No current signal · last broadcast 5d ago
Flights observed
41
Distinct callsigns
11
Country
-
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S AE51C3.

Callsign history 11 distinct

Callsign Airline Flights Last seen
DUKE11 - 8 2026-07-01
SPADE20 - 7 2026-07-08
SPADE33 - 5 2026-06-30
SPADE16 - 5 2026-06-10
SPADE06 - 4 2026-06-11
SPADE12 - 3 2026-07-09
SPADE10 - 3 2026-07-07
SPADE98 - 2 2026-06-18
HAZE10 - 2 2026-04-21
HAZE22 - 1 2026-04-27
DUSTY08 - 1 2026-06-25

Recent flights last 41

DateFlightRouteTakeoffLandingDuration
2026-07-09 SPADE12 - Jul 9, 13:05 UTCJul 9, 14:20 UTC1h 15m
2026-07-09 SPADE12 - Jul 9, 09:30 UTCJul 9, 11:25 UTC1h 55m
2026-07-09 SPADE12 WIE → WIE Jul 9, 08:35 UTCJul 9, 09:15 UTC40m
2026-07-08 SPADE20 WIE → WIE Jul 8, 20:55 UTCJul 8, 22:00 UTC1h 5m
2026-07-08 SPADE20 WIE → WIE Jul 8, 20:30 UTCJul 8, 20:45 UTC15m
2026-07-07 SPADE10 WIE → WIE Jul 7, 21:40 UTCJul 7, 21:55 UTC15m
2026-07-07 SPADE10 WIE → WIE Jul 7, 21:05 UTCJul 7, 21:35 UTC30m
2026-07-07 SPADE10 WIE → WIE Jul 7, 20:10 UTCJul 7, 20:55 UTC45m
2026-07-01 DUKE11 WIE → WIE Jul 1, 21:40 UTCJul 1, 23:00 UTC1h 20m
2026-07-01 DUKE11 - Jul 1, 18:10 UTCJul 1, 19:35 UTC1h 25m
2026-07-01 DUKE11 WIE → WIE Jul 1, 17:55 UTCJul 1, 18:00 UTC5m
2026-06-30 SPADE33 - Jun 30, 22:00 UTCJun 30, 22:10 UTC10m
2026-06-30 SPADE33 WIE → WIE Jun 30, 21:25 UTCJun 30, 21:55 UTC30m
2026-06-30 SPADE33 WIE → WIE Jun 30, 21:05 UTCJun 30, 21:15 UTC10m
2026-06-30 SPADE33 WIE → WIE Jun 30, 20:40 UTCJun 30, 21:00 UTC20m
2026-06-30 SPADE33 WIE → WIE Jun 30, 20:20 UTCJun 30, 20:25 UTC5m
2026-06-25 DUSTY08 WIE → WIE Jun 25, 10:25 UTCJun 25, 11:04 UTC40m
2026-06-23 DUKE11 WIE → WIE Jun 23, 21:34 UTCJun 23, 22:49 UTC1h 15m
2026-06-23 DUKE11 WIE → WIE Jun 23, 20:59 UTCJun 23, 21:20 UTC20m
2026-06-23 DUKE11 WIE → WIE Jun 23, 17:04 UTCJun 23, 18:50 UTC1h 45m
2026-06-18 SPADE98 - Jun 18, 09:05 UTCJun 18, 09:25 UTC20m
2026-06-18 SPADE98 - Jun 18, 06:10 UTCJun 18, 06:30 UTC20m
2026-06-11 SPADE06 WIE → WIE Jun 11, 11:45 UTCJun 11, 13:35 UTC1h 50m
2026-06-11 SPADE06 - Jun 11, 08:25 UTCJun 11, 10:00 UTC1h 35m
2026-06-10 SPADE16 WIE → WIE Jun 10, 21:25 UTCJun 10, 22:00 UTC35m
2026-06-10 SPADE16 WIE → WIE Jun 10, 20:50 UTCJun 10, 21:15 UTC25m
2026-06-10 SPADE16 WIE → WIE Jun 10, 19:10 UTCJun 10, 19:20 UTC10m
2026-06-10 SPADE16 WIE → WIE Jun 10, 18:55 UTCJun 10, 19:05 UTC10m
2026-06-10 SPADE16 WIE → WIE Jun 10, 18:10 UTCJun 10, 18:45 UTC35m
2026-06-09 SPADE20 WIE → WIE Jun 9, 21:35 UTCJun 9, 22:10 UTC35m
2026-06-09 SPADE20 WIE → WIE Jun 9, 21:05 UTCJun 9, 21:20 UTC15m
2026-06-09 SPADE20 WIE → WIE Jun 9, 19:45 UTCJun 9, 19:50 UTC5m
2026-06-09 SPADE20 WIE → WIE Jun 9, 18:55 UTCJun 9, 19:40 UTC45m
2026-06-09 SPADE20 WIE → WIE Jun 9, 17:55 UTCJun 9, 18:50 UTC55m
2026-06-02 SPADE06 - Jun 2, 09:10 UTCJun 2, 10:00 UTC50m
2026-06-02 SPADE06 - Jun 2, 07:00 UTCJun 2, 08:30 UTC1h 30m
2026-05-20 DUKE11 WIE → WIE May 20, 20:15 UTCMay 20, 21:15 UTC1h 0m
2026-05-20 DUKE11 WIE → WIE May 20, 16:05 UTCMay 20, 17:40 UTC1h 35m
2026-04-27 HAZE22 - Apr 27, 12:30 UTCApr 27, 13:20 UTC50m
2026-04-21 HAZE10 - Apr 21, 18:50 UTCApr 21, 19:40 UTC50m
2026-04-21 HAZE10 - Apr 21, 16:55 UTCApr 21, 17:40 UTC45m

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 11-20396 page for operator, model, and routing details .

Mode-S AE51C3 frequently asked

What is Mode-S code AE51C3?
AE51C3 is an ICAO 24-bit transponder address. Assigned to 11-20396.
Is AE51C3 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE51C3, octal 53450703, decimal 11,424,195.
What flights does AE51C3 operate?
Mode-S AE51C3 has broadcast 11 distinct callsigns, including DUKE11, SPADE20, SPADE33, SPADE16, SPADE06.