Apparatus

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sensors Mode-S transponder

AE1121

ICAO 24-bit transponder address

Currently assigned to 02-3646 · BEECHCRAFT T-6 Texan 2

Hex
AE1121
Octal
53410441
Decimal
11,407,649
Tail
02-3646
Type
TEX2
No current signal · last broadcast 16d ago
Flights observed
4
Distinct callsigns
3
Country
-
Last broadcast
16d ago

Last known position

Most recent position reported by Mode-S AE1121.

Callsign history 3 distinct

Callsign Airline Flights Last seen
CUJO25 - 2 2026-05-14
SPIKE11 - 1 2026-05-06
FLAT69 - 1 2026-04-30

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-14 CUJO25 - May 14, 03:00 UTCMay 14, 03:10 UTC10m
2026-05-14 CUJO25 - May 14, 01:45 UTCMay 14, 02:10 UTC25m
2026-05-06 SPIKE11 - May 6, 13:40 UTCMay 6, 13:50 UTC10m
2026-04-30 FLAT69 - Apr 30, 19:35 UTCApr 30, 19:50 UTC15m

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 02-3646 page for operator, model, and routing details .

Mode-S AE1121 frequently asked

What is Mode-S code AE1121?
AE1121 is an ICAO 24-bit transponder address. Assigned to 02-3646.
Is AE1121 broadcasting right now?
No active broadcast right now. Last signal was 16d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE1121, octal 53410441, decimal 11,407,649.
What flights does AE1121 operate?
Mode-S AE1121 has broadcast 3 distinct callsigns, including CUJO25, SPIKE11, FLAT69.