Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE4865

ICAO 24-bit transponder address

Currently assigned to 09-20183 · SIKORSKY UH-60 Black Hawk

Hex
AE4865
Octal
53444145
Decimal
11,421,797
Tail
09-20183
Type
H60
No current signal · last broadcast 1d ago
Flights observed
2
Distinct callsigns
1
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE4865.

Callsign history 1 distinct

Callsign Airline Flights Last seen
R20725 - 2 2026-04-13

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-13 R20725 - Apr 13, 22:45 UTCApr 13, 23:40 UTC55m
2026-04-13 R20725 HOP → HOP Apr 13, 20:05 UTCApr 13, 20:45 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 09-20183 page for operator, model, and routing details .

Mode-S AE4865 frequently asked

What is Mode-S code AE4865?
AE4865 is an ICAO 24-bit transponder address. Assigned to 09-20183.
Is AE4865 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 AE4865, octal 53444145, decimal 11,421,797.
What flights does AE4865 operate?
Mode-S AE4865 has broadcast 1 distinct callsign, including R20725.