Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE4B87

ICAO 24-bit transponder address

Currently assigned to 163081 · SIKORSKY CH-53

Hex
AE4B87
Octal
53445607
Decimal
11,422,599
Tail
163081
Type
H53
No current signal · last broadcast 9d ago
Flights observed
4
Distinct callsigns
2
Country
-
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S AE4B87.

Callsign history 2 distinct

Callsign Airline Flights Last seen
BO21 - 3 2026-05-20
WLFPK01 - 1 2026-04-17

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-20 BO21 - May 20, 08:45 UTCMay 20, 08:55 UTC10m
2026-05-20 BO21 - May 20, 07:10 UTCMay 20, 08:15 UTC1h 5m
2026-05-20 BO21 - May 20, 06:10 UTCMay 20, 06:35 UTC25m
2026-04-17 WLFPK01 - Apr 17, 02:40 UTCApr 17, 02:50 UTC10m

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 163081 page for operator, model, and routing details .

Mode-S AE4B87 frequently asked

What is Mode-S code AE4B87?
AE4B87 is an ICAO 24-bit transponder address. Assigned to 163081.
Is AE4B87 broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE4B87, octal 53445607, decimal 11,422,599.
What flights does AE4B87 operate?
Mode-S AE4B87 has broadcast 2 distinct callsigns, including BO21, WLFPK01.