Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE0181

ICAO 24-bit transponder address

Currently assigned to 84-0139 · LEARJET 35

Hex
AE0181
Octal
53400601
Decimal
11,403,649
Tail
84-0139
Type
LJ35
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 AE0181.

Callsign history 2 distinct

Callsign Airline Flights Last seen
SPAR752 - 3 2026-04-13
COUGR55 - 1 2026-04-13

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-13 COUGR55 - Apr 13, 19:35 UTCApr 13, 19:50 UTC15m
2026-04-13 SPAR752 - Apr 13, 16:15 UTCApr 13, 17:35 UTC1h 20m
2026-04-13 SPAR752 - Apr 13, 15:55 UTCApr 13, 16:15 UTC20m
2026-04-13 SPAR752 - Apr 13, 12:45 UTCApr 13, 14:20 UTC1h 35m

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 84-0139 page for operator, model, and routing details .

Mode-S AE0181 frequently asked

What is Mode-S code AE0181?
AE0181 is an ICAO 24-bit transponder address. Assigned to 84-0139.
Is AE0181 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 AE0181, octal 53400601, decimal 11,403,649.
What flights does AE0181 operate?
Mode-S AE0181 has broadcast 2 distinct callsigns, including SPAR752, COUGR55.