Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE1F42

ICAO 24-bit transponder address

Currently assigned to 08-72051 · Airbus Helicopters UH-72A Lakota

Hex
AE1F42
Octal
53417502
Decimal
11,411,266
Tail
08-72051
Type
EC45
No current signal · last broadcast 1d ago
Flights observed
4
Distinct callsigns
2
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE1F42.

Callsign history 2 distinct

Callsign Airline Flights Last seen
WATTS99 - 2 2026-04-17
WATTS76 - 2 2026-04-16

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-17 WATTS99 - Apr 17, 03:20 UTCApr 17, 04:20 UTC1h 0m
2026-04-17 WATTS99 MZJ → MZJ Apr 17, 02:15 UTCApr 17, 03:10 UTC55m
2026-04-16 WATTS76 - Apr 16, 17:25 UTCApr 16, 18:25 UTC1h 0m
2026-04-16 WATTS76 - Apr 16, 16:05 UTCApr 16, 17:05 UTC1h 0m

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 08-72051 page for operator, model, and routing details .

Mode-S AE1F42 frequently asked

What is Mode-S code AE1F42?
AE1F42 is an ICAO 24-bit transponder address. Assigned to 08-72051.
Is AE1F42 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 AE1F42, octal 53417502, decimal 11,411,266.
What flights does AE1F42 operate?
Mode-S AE1F42 has broadcast 2 distinct callsigns, including WATTS99, WATTS76.