Apparatus

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sensors Mode-S transponder

3C542A

ICAO 24-bit transponder address · allocated to Germany

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

Hex
3C542A
Octal
17052052
Decimal
3,953,706
Country
DE
Tail
D-AEAJ
Type
A306
No current signal · last broadcast 13h ago
Flights observed
108
Distinct callsigns
20
Country
DE
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 3C542A.

Country allocation

The ICAO 24-bit address 3C542A 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
BCS57D European Air Transport 5 2026-05-19
BCS2665 European Air Transport 5 2026-05-18
BCS2230 European Air Transport 4 2026-05-14
BCS8WF European Air Transport 3 2026-05-30
BCS44C European Air Transport 3 2026-05-13
BCS3YK European Air Transport 3 2026-05-19
BCS3UP European Air Transport 3 2026-05-19
BCS2WP European Air Transport 3 2026-06-01
BCS229 - 3 2026-05-14
BCS20A European Air Transport 3 2026-05-13
BCS9TC European Air Transport 2 2026-05-21
BCS7JG European Air Transport 2 2026-05-08
BCS7EM - 2 2026-04-17
BCS6756 European Air Transport 2 2026-04-28
BCS62B European Air Transport 2 2026-04-28
BCS62A European Air Transport 2 2026-04-17
BCS5QC European Air Transport 2 2026-05-07
BCS5NR European Air Transport 2 2026-05-06
BCS5709 European Air Transport 2 2026-05-06
BCS5706 European Air Transport 2 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 BCS1443 LEJ → LEJ Jun 2, 05:05 UTCJun 2, 05:45 UTC40m
2026-06-02 BCS8PA LEJ → STN Jun 2, 01:30 UTCJun 2, 02:45 UTC1h 15m
2026-06-01 BCS2WP FRA → LEJ Jun 1, 20:50 UTCJun 1, 21:30 UTC40m
2026-06-01 BCS204 DUB → DUB Jun 1, 04:55 UTCJun 1, 06:20 UTC1h 25m
2026-06-01 BCS2882 LEJ → DUB Jun 1, 02:40 UTCJun 1, 03:15 UTC35m
2026-05-30 BCS8WF LEJ → EMA May 30, 01:10 UTCMay 30, 02:35 UTC1h 25m
2026-05-29 BCS5547 WAW → LEJ May 29, 20:00 UTCMay 29, 21:00 UTC1h 0m
2026-05-29 BCS5546 LEJ → WAW May 29, 03:00 UTCMay 29, 04:05 UTC1h 5m
2026-05-28 BCS2WP FRA → LEJ May 28, 20:50 UTCMay 28, 21:30 UTC40m
2026-05-28 BCS6717 LTN → FRA May 28, 10:05 UTCMay 28, 11:10 UTC1h 5m
2026-05-28 BCS13G FRA → LTN May 28, 06:50 UTCMay 28, 08:00 UTC1h 10m
2026-05-28 BCS186 LEJ → FRA May 28, 02:45 UTCMay 28, 03:25 UTC40m
2026-05-27 BCS13J BTS → LEJ May 27, 20:30 UTCMay 27, 21:25 UTC55m
2026-05-27 BCS50Q LEJ → BTS May 27, 02:49 UTCMay 27, 03:39 UTC50m
2026-05-25 BCS2WP FRA → LEJ May 25, 20:40 UTCMay 25, 21:15 UTC35m
2026-05-25 BCS204 DUB → DUB May 25, 03:35 UTCMay 25, 05:05 UTC1h 30m
2026-05-23 BCS8WF LEJ → EMA May 23, 00:50 UTCMay 23, 02:20 UTC1h 30m
2026-05-22 BCS48B CDG → LEJ May 22, 21:15 UTCMay 22, 22:25 UTC1h 10m
2026-05-22 BCS90Y LEJ → CDG May 22, 02:20 UTCMay 22, 03:35 UTC1h 15m
2026-05-21 BCS9TC VIT → LEJ May 21, 21:15 UTCMay 21, 23:15 UTC2h 0m
2026-05-20 BCS36V - May 20, 18:20 UTCMay 20, 19:15 UTC55m
2026-05-20 BCS5WE VIT → SVQ May 20, 06:05 UTCMay 20, 07:05 UTC1h 0m
2026-05-20 BCS198 LEJ → CGN May 20, 01:50 UTCMay 20, 03:50 UTC2h 0m
2026-05-19 BCS3YK OPO → LEJ May 19, 19:15 UTCMay 19, 21:55 UTC2h 40m
2026-05-19 BCS57D VIT → OPO May 19, 05:35 UTCMay 19, 06:25 UTC50m
2026-05-19 BCS3UP BRU → VIT May 19, 01:35 UTCMay 19, 03:05 UTC1h 30m
2026-05-18 BCS2665 LHR → BRU May 18, 22:05 UTCMay 18, 22:45 UTC40m
2026-05-18 BCS229P LTN → LHR May 18, 19:05 UTCMay 18, 19:25 UTC20m
2026-05-17 BCS19U LEJ → LTN May 17, 21:40 UTCMay 17, 23:05 UTC1h 25m
2026-05-15 BCS9YP FRA → LEJ May 15, 20:55 UTCMay 15, 21:35 UTC40m
2026-05-15 BCS6359 MAD → FRA May 15, 15:30 UTCMay 15, 17:40 UTC2h 10m
2026-05-15 BCS41E BRU → MAD May 15, 01:30 UTCMay 15, 03:20 UTC1h 50m
2026-05-14 BCS2665 LHR → BRU May 14, 22:40 UTCMay 14, 23:20 UTC40m
2026-05-14 BCS229 - May 14, 19:45 UTCMay 14, 20:10 UTC25m
2026-05-14 BCS2230 LEJ → STN May 14, 04:00 UTCMay 14, 05:15 UTC1h 15m
2026-05-13 BCS44C CPH → LEJ May 13, 21:25 UTCMay 13, 22:15 UTC50m
2026-05-13 BCS20A LEJ → CPH May 13, 02:00 UTCMay 13, 02:50 UTC50m
2026-05-12 BCS3YK OPO → LEJ May 12, 19:15 UTCMay 12, 21:50 UTC2h 35m
2026-05-12 BCS57D VIT → OPO May 12, 05:35 UTCMay 12, 06:25 UTC50m
2026-05-11 BCS2665 LHR → BRU May 11, 22:00 UTCMay 11, 22:35 UTC34m
2026-05-11 BCS229P LTN → LHR May 11, 19:20 UTCMay 11, 19:35 UTC15m
2026-05-10 BCS19U LEJ → LTN May 10, 21:44 UTCMay 10, 23:09 UTC1h 25m
2026-05-10 BCS56W EMA → LEJ May 10, 10:19 UTCMay 10, 11:40 UTC1h 20m
2026-05-09 BCS8WF LEJ → EMA May 9, 01:05 UTCMay 9, 02:30 UTC1h 25m
2026-05-08 BCS7JG MAD → LEJ May 8, 19:50 UTCMay 8, 22:05 UTC2h 15m
2026-05-08 BCS10K LEJ → MAD May 8, 02:19 UTCMay 8, 04:54 UTC2h 35m
2026-05-07 BCS167 CGN → LEJ May 7, 21:00 UTCMay 7, 21:40 UTC40m
2026-05-07 BCS202P STN → STN May 7, 04:45 UTCMay 7, 06:10 UTC1h 25m
2026-05-07 BCS5QC EMA → DUB May 7, 02:15 UTCMay 7, 02:50 UTC35m
2026-05-06 BCS5NR MXP → AOI May 6, 22:05 UTCMay 6, 23:40 UTC1h 35m

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

Mode-S 3C542A frequently asked

What is Mode-S code 3C542A?
3C542A is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AEAJ.
Where is Mode-S 3C542A registered?
Mode-S code 3C542A is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C542A broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C542A, octal 17052052, decimal 3,953,706.
What flights does 3C542A operate?
Mode-S 3C542A has broadcast 20 distinct callsigns, including BCS57D, BCS2665, BCS2230, BCS8WF, BCS44C.