sensors Mode-S transponder

3C54A1

ICAO 24-bit transponder address · allocated to Germany

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

Hex
3C54A1
Octal
17052241
Decimal
3,953,825
Country
DE
Tail
D-AEEA
Type
A21N
Broadcasting now · callsign EWG7WB · 34,750 ft
Flights observed
12
Distinct callsigns
5
Country
DE
Last broadcast
1d ago

Current position

3C54A1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C54A1 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
EWG7WB - 3 2026-04-13
EWG7DL - 3 2026-04-13
EWG4EH - 3 2026-04-13
EWG6AZ - 2 2026-04-13
EWG44U - 1 2026-04-12

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-13 EWG6AZ - Apr 13, 19:50 UTCApr 13, 21:50 UTC2h 0m
2026-04-13 EWG6AZ - Apr 13, 18:55 UTCApr 13, 20:10 UTC1h 15m
2026-04-13 EWG7WB - Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 EWG7WB - Apr 13, 15:50 UTCApr 13, 16:30 UTC40m
2026-04-13 EWG7WB - Apr 13, 13:20 UTCApr 13, 16:15 UTC2h 55m
2026-04-13 EWG7DL - Apr 13, 08:20 UTCApr 13, 09:45 UTC1h 25m
2026-04-13 EWG7DL - Apr 13, 07:55 UTCApr 13, 09:45 UTC1h 50m
2026-04-13 EWG7DL - Apr 13, 07:30 UTCApr 13, 08:15 UTC45m
2026-04-13 EWG4EH - Apr 13, 04:20 UTCApr 13, 06:15 UTC1h 55m
2026-04-13 EWG4EH - Apr 13, 03:55 UTCApr 13, 06:15 UTC2h 20m
2026-04-13 EWG4EH - Apr 13, 03:40 UTCApr 13, 04:15 UTC35m
2026-04-12 EWG44U - Apr 12, 18:25 UTCApr 12, 20:15 UTC1h 50m

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-AEEA page for operator, model, and routing details .

Mode-S 3C54A1 frequently asked

What is Mode-S code 3C54A1?
3C54A1 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AEEA.
Where is Mode-S 3C54A1 registered?
Mode-S code 3C54A1 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C54A1 broadcasting right now?
Yes. Mode-S 3C54A1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C54A1, octal 17052241, decimal 3,953,825.
What flights does 3C54A1 operate?
Mode-S 3C54A1 has broadcast 5 distinct callsigns, including EWG7WB, EWG7DL, EWG4EH, EWG6AZ, EWG44U.