sensors Mode-S transponder

3C54A4

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AEED · AIRBUS A-321neo

Hex
3C54A4
Octal
17052244
Decimal
3,953,828
Country
DE
Tail
D-AEED
Type
A21N
No current signal · last broadcast 12h ago
Flights observed
10
Distinct callsigns
5
Country
DE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 3C54A4.

Country allocation

The ICAO 24-bit address 3C54A4 falls within the block assigned to Germany (DE) by ICAO Annex 10, Volume III. Every aircraft registered in Germany receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 5 distinct

Callsign Airline Flights Last seen
EWG5DT - 3 2026-04-13
EWG2BR Eurowings 3 2026-04-13
EWG28J - 2 2026-04-14
EWG82U - 1 2026-04-14
EWG29H - 1 2026-04-12

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 EWG82U - Apr 14, 09:10 UTCApr 14, 11:05 UTC1h 55m
2026-04-14 EWG28J - Apr 14, 07:10 UTCApr 14, 07:50 UTC40m
2026-04-14 EWG28J - Apr 14, 05:15 UTCApr 14, 07:10 UTC1h 55m
2026-04-13 EWG5DT - Apr 13, 19:50 UTCApr 13, 20:20 UTC30m
2026-04-13 EWG5DT - Apr 13, 16:15 UTCApr 13, 20:10 UTC3h 55m
2026-04-13 EWG5DT - Apr 13, 16:05 UTCApr 13, 16:15 UTC10m
2026-04-13 EWG2BR OTP → DUS Apr 13, 12:20 UTCApr 13, 13:55 UTC1h 35m
2026-04-13 EWG2BR OTP → DUS Apr 13, 11:55 UTCApr 13, 13:55 UTC2h 0m
2026-04-13 EWG2BR OTP → DUS Apr 13, 09:55 UTCApr 13, 12:15 UTC2h 20m
2026-04-12 EWG29H - Apr 12, 18:50 UTCApr 12, 20:15 UTC1h 25m

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 D-AEED page for operator, model, and routing details .

Mode-S 3C54A4 frequently asked

What is Mode-S code 3C54A4?
3C54A4 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AEED.
Where is Mode-S 3C54A4 registered?
Mode-S code 3C54A4 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C54A4 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C54A4, octal 17052244, decimal 3,953,828.
What flights does 3C54A4 operate?
Mode-S 3C54A4 has broadcast 5 distinct callsigns, including EWG5DT, EWG2BR, EWG28J, EWG82U, EWG29H.