Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE77F7

ICAO 24-bit transponder address

Currently assigned to 24-21283 · SIKORSKY UH-60 Black Hawk

Hex
AE77F7
Octal
53473767
Decimal
11,433,975
Tail
24-21283
Type
H60
No current signal · last broadcast 3h ago
Flights observed
4
Distinct callsigns
2
Country
-
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S AE77F7.

Callsign history 2 distinct

Callsign Airline Flights Last seen
TALON12 - 2 2026-06-02
R21283 - 2 2026-06-02

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-06-02 TALON12 - Jun 2, 22:50 UTCJun 2, 23:10 UTC20m
2026-06-02 TALON12 - Jun 2, 17:35 UTCJun 2, 17:55 UTC20m
2026-06-02 R21283 - Jun 2, 14:10 UTCJun 2, 15:30 UTC1h 20m
2026-05-19 R21283 - May 19, 18:05 UTCMay 19, 18:30 UTC25m

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 24-21283 page for operator, model, and routing details .

Mode-S AE77F7 frequently asked

What is Mode-S code AE77F7?
AE77F7 is an ICAO 24-bit transponder address. Assigned to 24-21283.
Is AE77F7 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE77F7, octal 53473767, decimal 11,433,975.
What flights does AE77F7 operate?
Mode-S AE77F7 has broadcast 2 distinct callsigns, including TALON12, R21283.