Apparatus

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sensors Mode-S transponder

AE7478

ICAO 24-bit transponder address

Currently assigned to 21-03395 · Boeing AH-64E Apache

Hex
AE7478
Octal
53472170
Decimal
11,433,080
Tail
21-03395
Type
H64
No current signal · last broadcast Apr 24, 01:20 UTC
Flights observed
4
Distinct callsigns
3
Country
-
Last broadcast
Apr 24, 01:20 UTC

Last known position

Most recent position reported by Mode-S AE7478.

Callsign history 3 distinct

Callsign Airline Flights Last seen
CHAOS21 - 2 2026-04-23
CHAOS32 - 1 2026-04-22
CHAOS31 - 1 2026-04-24

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-04-24 CHAOS31 - Apr 24, 01:10 UTCApr 24, 01:20 UTC10m
2026-04-23 CHAOS21 - Apr 23, 22:55 UTCApr 23, 23:10 UTC15m
2026-04-22 CHAOS32 - Apr 22, 23:30 UTCApr 23, 00:05 UTC35m
2026-04-21 CHAOS21 - Apr 21, 18:50 UTCApr 21, 20:10 UTC1h 20m

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 21-03395 page for operator, model, and routing details .

Mode-S AE7478 frequently asked

What is Mode-S code AE7478?
AE7478 is an ICAO 24-bit transponder address. Assigned to 21-03395.
Is AE7478 broadcasting right now?
No active broadcast right now. Last signal was Apr 24, 01:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AE7478, octal 53472170, decimal 11,433,080.
What flights does AE7478 operate?
Mode-S AE7478 has broadcast 3 distinct callsigns, including CHAOS21, CHAOS32, CHAOS31.