Apparatus

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sensors Mode-S transponder

AE77EE

ICAO 24-bit transponder address

Currently assigned to 23-21274 · SIKORSKY UH-60 Black Hawk

Hex
AE77EE
Octal
53473756
Decimal
11,433,966
Tail
23-21274
Type
H60
No current signal · last broadcast Jul 17, 02:50 UTC
Flights observed
18
Distinct callsigns
1
Country
-
Last broadcast
Jul 17, 02:50 UTC

Last known position

Most recent position reported by Mode-S AE77EE.

Callsign history 1 distinct

Callsign Airline Flights Last seen
G21274 - 18 2026-07-17

Recent flights last 18

DateFlightRouteTakeoffLandingDuration
2026-07-17 G21274 - Jul 17, 01:15 UTCJul 17, 02:50 UTC1h 35m
2026-07-16 G21274 - Jul 16, 23:59 UTCJul 17, 00:55 UTC55m
2026-07-16 G21274 - Jul 16, 17:14 UTCJul 16, 20:00 UTC2h 45m
2026-07-16 G21274 - Jul 16, 03:45 UTCJul 16, 04:40 UTC55m
2026-07-15 G21274 - Jul 15, 21:50 UTCJul 15, 22:20 UTC30m
2026-07-09 G21274 - Jul 9, 16:55 UTCJul 9, 17:55 UTC1h 0m
2026-07-08 G21274 - Jul 8, 17:05 UTCJul 8, 18:40 UTC1h 35m
2026-07-08 G21274 - Jul 8, 14:05 UTCJul 8, 14:55 UTC50m
2026-07-08 G21274 - Jul 8, 02:25 UTCJul 8, 03:05 UTC40m
2026-07-07 G21274 - Jul 7, 02:35 UTCJul 7, 03:00 UTC25m
2026-07-07 G21274 - Jul 7, 00:50 UTCJul 7, 01:05 UTC15m
2026-07-02 G21274 - Jul 2, 14:50 UTCJul 2, 16:25 UTC1h 35m
2026-06-11 G21274 - Jun 11, 16:45 UTCJun 11, 18:00 UTC1h 15m
2026-06-11 G21274 - Jun 11, 14:00 UTCJun 11, 15:10 UTC1h 10m
2026-05-08 G21274 - May 8, 14:05 UTCMay 8, 14:15 UTC10m
2026-04-16 G21274 - Apr 16, 13:15 UTCApr 16, 14:45 UTC1h 30m
2026-04-15 G21274 - Apr 15, 21:05 UTCApr 15, 21:30 UTC25m
2026-04-15 G21274 - Apr 15, 20:20 UTCApr 15, 21:00 UTC40m

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 23-21274 page for operator, model, and routing details .

Mode-S AE77EE frequently asked

What is Mode-S code AE77EE?
AE77EE is an ICAO 24-bit transponder address. Assigned to 23-21274.
Is AE77EE broadcasting right now?
No active broadcast right now. Last signal was Jul 17, 02:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE77EE, octal 53473756, decimal 11,433,966.
What flights does AE77EE operate?
Mode-S AE77EE has broadcast 1 distinct callsign, including G21274.