Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AE63C4

ICAO 24-bit transponder address

Currently assigned to 21-46088 · BOEING 767-200

Hex
AE63C4
Octal
53461704
Decimal
11,428,804
Tail
21-46088
Type
B762
No current signal · last broadcast 1d ago
Flights observed
2
Distinct callsigns
2
Country
-
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S AE63C4.

Callsign history 2 distinct

Callsign Airline Flights Last seen
HOBEY21 - 1 2026-04-28
DUCE08 - 1 2026-04-23

Recent flights last 2

DateFlightRouteTakeoffLandingDuration
2026-04-28 HOBEY21 - Apr 28, 14:00 UTCApr 28, 17:15 UTC3h 15m
2026-04-23 DUCE08 - Apr 23, 19:00 UTCApr 23, 21:45 UTC2h 45m

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 21-46088 page for operator, model, and routing details .

Mode-S AE63C4 frequently asked

What is Mode-S code AE63C4?
AE63C4 is an ICAO 24-bit transponder address. Assigned to 21-46088.
Is AE63C4 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 AE63C4, octal 53461704, decimal 11,428,804.
What flights does AE63C4 operate?
Mode-S AE63C4 has broadcast 2 distinct callsigns, including HOBEY21, DUCE08.