Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE50B9

ICAO 24-bit transponder address

Currently assigned to 10-20249 · SIKORSKY UH-60 Black Hawk

Hex
AE50B9
Octal
53450271
Decimal
11,423,929
Tail
10-20249
Type
H60
No current signal · last broadcast 2d ago
Flights observed
4
Distinct callsigns
2
Country
-
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S AE50B9.

Callsign history 2 distinct

Callsign Airline Flights Last seen
SUPRT61 - 3 2026-05-18
MONDO06 - 1 2026-05-06

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-18 SUPRT61 - May 18, 17:05 UTCMay 18, 17:20 UTC15m
2026-05-18 SUPRT61 - May 18, 16:10 UTCMay 18, 16:30 UTC20m
2026-05-18 SUPRT61 - May 18, 14:55 UTCMay 18, 15:20 UTC25m
2026-05-06 MONDO06 - May 6, 02:45 UTCMay 6, 03:25 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 10-20249 page for operator, model, and routing details .

Mode-S AE50B9 frequently asked

What is Mode-S code AE50B9?
AE50B9 is an ICAO 24-bit transponder address. Assigned to 10-20249.
Is AE50B9 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE50B9, octal 53450271, decimal 11,423,929.
What flights does AE50B9 operate?
Mode-S AE50B9 has broadcast 2 distinct callsigns, including SUPRT61, MONDO06.