Apparatus

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sensors Mode-S transponder

3C542B

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AEAK · AIRBUS A-300-600

Hex
3C542B
Octal
17052053
Decimal
3,953,707
Country
DE
Tail
D-AEAK
Type
A306
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
116
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 3C542B.

Country allocation

The ICAO 24-bit address 3C542B 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 20 distinct

Callsign Airline Flights Last seen
BCS62B European Air Transport 5 2026-07-24
BCS42M - 4 2026-07-09
BCS8AA - 3 2026-07-09
BCS6359 - 3 2026-07-10
BCS48D - 3 2026-07-09
BCS41E - 3 2026-07-10
BCS2UR - 3 2026-07-08
BCS1LG - 3 2026-04-16
BCS10K European Air Transport 3 2026-04-23
TEST2 - 2 2026-06-02
BCS8PA - 2 2026-07-18
BCS73B European Air Transport 2 2026-04-16
BCS6GA - 2 2026-07-09
BCS6769 - 2 2026-07-12
BCS6756 European Air Transport 2 2026-07-24
BCS5QC European Air Transport 2 2026-07-23
BCS5NR European Air Transport 2 2026-07-22
BCS5706 European Air Transport 2 2026-07-22
BCS50Q - 2 2026-07-12
BCS44C European Air Transport 2 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BCS7508 LEJ → VBS Jul 26, 22:35 UTCJul 26, 22:45 UTC10m
2026-07-25 BCS2RA LIS → LIS Jul 25, 20:45 UTCJul 25, 23:40 UTC2h 55m
2026-07-25 BCS18K BCN → LIS Jul 25, 06:35 UTCJul 25, 08:20 UTC1h 45m
2026-07-25 BCS3LR LEJ → LEJ Jul 25, 02:40 UTCJul 25, 04:40 UTC2h 0m
2026-07-24 BCS39G LHR → LEJ Jul 24, 22:00 UTCJul 24, 23:15 UTC1h 15m
2026-07-24 BCS35P MXP → LHR Jul 24, 18:50 UTCJul 24, 20:10 UTC1h 20m
2026-07-24 BCS6756 LHR → LTN Jul 24, 08:50 UTCJul 24, 10:30 UTC1h 40m
2026-07-24 BCS62B LEJ → LTN Jul 24, 02:00 UTCJul 24, 03:10 UTC1h 10m
2026-07-23 BCS167 CGN → LEJ Jul 23, 21:00 UTCJul 23, 21:45 UTC45m
2026-07-23 BCS202P STN → STN Jul 23, 04:40 UTCJul 23, 06:10 UTC1h 30m
2026-07-23 BCS5QC EMA → DUB Jul 23, 02:20 UTCJul 23, 03:00 UTC40m
2026-07-22 BCS5NR MXP → AOI Jul 22, 22:25 UTCJul 23, 00:05 UTC1h 40m
2026-07-22 BCS5709 MXP → LEJ Jul 22, 17:05 UTCJul 22, 19:05 UTC2h 0m
2026-07-22 BCS5706 LEJ → OTP Jul 22, 03:15 UTCJul 22, 04:55 UTC1h 40m
2026-07-21 BCS167 CGN → LEJ Jul 21, 21:15 UTCJul 21, 22:00 UTC45m
2026-07-21 BCS202P STN → STN Jul 21, 04:35 UTCJul 21, 06:05 UTC1h 30m
2026-07-21 BCS5QC EMA → DUB Jul 21, 02:10 UTCJul 21, 02:45 UTC35m
2026-07-20 BCS5NR MXP → EMA Jul 20, 22:30 UTCJul 21, 00:10 UTC1h 40m
2026-07-20 BCS5707 MXP → OTP Jul 20, 16:55 UTCJul 20, 19:00 UTC2h 5m
2026-07-20 BCS5706 LEJ → OTP Jul 20, 01:50 UTCJul 20, 03:25 UTC1h 35m
2026-07-19 BCS25C BRU → LEJ Jul 19, 20:10 UTCJul 19, 21:05 UTC55m
2026-07-19 BCS6741 LHR → BRU Jul 19, 06:55 UTCJul 19, 07:45 UTC50m
2026-07-18 BCS6778 CDG → LHR Jul 18, 20:25 UTCJul 18, 21:10 UTC45m
2026-07-18 BCS89N LHR → CDG Jul 18, 17:40 UTCJul 18, 18:20 UTC40m
2026-07-18 BCS6731 AMS → LHR Jul 18, 14:50 UTCJul 18, 15:40 UTC50m
2026-07-18 BCS223 - Jul 18, 09:15 UTCJul 18, 09:55 UTC40m
2026-07-18 BCS8PA LEJ → LTN Jul 18, 02:05 UTCJul 18, 03:30 UTC1h 26m
2026-07-17 BCS1491 AMS → LEJ Jul 17, 19:40 UTCJul 17, 20:40 UTC1h 0m
2026-07-17 BCS1443 - Jul 17, 05:04 UTCJul 17, 05:55 UTC50m
2026-07-17 BCS8PA LEJ → STN Jul 17, 01:20 UTCJul 17, 02:45 UTC1h 25m
2026-07-16 BCS33G MUC → LEJ Jul 16, 21:10 UTCJul 16, 21:45 UTC35m
2026-07-16 BCS26N LEJ → MUC Jul 16, 03:10 UTCJul 16, 03:50 UTC40m
2026-07-15 BCS55K - Jul 15, 20:05 UTCJul 15, 22:15 UTC2h 10m
2026-07-15 BCS3LR LEJ → BCN Jul 15, 02:05 UTCJul 15, 04:10 UTC2h 5m
2026-07-14 BCS48B - Jul 14, 21:00 UTCJul 14, 22:00 UTC1h 0m
2026-07-14 BCS2EV LEJ → CDG Jul 14, 00:40 UTCJul 14, 01:55 UTC1h 15m
2026-07-13 BCS13J - Jul 13, 20:15 UTCJul 13, 21:15 UTC1h 0m
2026-07-12 BCS50Q LEJ → BTS Jul 12, 23:30 UTCJul 13, 00:20 UTC50m
2026-07-12 BCS6769 - Jul 12, 09:05 UTCJul 12, 10:20 UTC1h 15m
2026-07-11 BCS62B LEJ → LTN Jul 11, 05:55 UTCJul 11, 07:15 UTC1h 20m
2026-07-10 BCS9YP - Jul 10, 20:50 UTCJul 10, 21:25 UTC35m
2026-07-10 BCS6359 - Jul 10, 15:30 UTCJul 10, 17:25 UTC1h 55m
2026-07-10 BCS41E - Jul 10, 01:30 UTCJul 10, 03:20 UTC1h 50m
2026-07-09 BCS8AA MXP → BRU Jul 9, 22:35 UTCJul 9, 23:35 UTC1h 0m
2026-07-09 BCS42M - Jul 9, 18:25 UTCJul 9, 19:35 UTC1h 10m
2026-07-09 BCS48D - Jul 9, 05:55 UTCJul 9, 06:50 UTC55m
2026-07-09 BCS6GA BRU → MXP Jul 9, 01:20 UTCJul 9, 02:25 UTC1h 5m
2026-07-08 BCS2UR - Jul 8, 20:30 UTCJul 8, 22:20 UTC1h 50m
2026-07-08 BCS6360 FRA → MAD Jul 8, 15:25 UTCJul 8, 17:35 UTC2h 10m
2026-07-08 BCS186 - Jul 8, 02:40 UTCJul 8, 03:10 UTC30m

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

Mode-S 3C542B frequently asked

What is Mode-S code 3C542B?
3C542B is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AEAK.
Where is Mode-S 3C542B registered?
Mode-S code 3C542B is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C542B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C542B, octal 17052053, decimal 3,953,707.
What flights does 3C542B operate?
Mode-S 3C542B has broadcast 20 distinct callsigns, including BCS62B, BCS42M, BCS8AA, BCS6359, BCS48D.