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 Jul 26, 21:20 UTC
Flights observed
221
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 21:20 UTC

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 - 9 2026-06-23
BCS2665 - 9 2026-06-22
BCS3UP - 7 2026-06-23
BCS2230 - 7 2026-06-16
BCS5GU European Air Transport 6 2026-07-26
BCS44C European Air Transport 6 2026-07-21
BCS229 - 6 2026-06-16
BCS3YK - 5 2026-06-23
BCS20A - 5 2026-07-09
BCS8PA European Air Transport 4 2026-07-24
BCS7JG - 4 2026-07-14
BCS73B European Air Transport 4 2026-07-23
BCS6756 - 4 2026-07-10
BCS62B - 4 2026-07-10
BCS48B - 4 2026-06-13
BCS39G - 4 2026-07-10
BCS35P - 4 2026-07-10
BCS2WP - 4 2026-06-21
BCS2FC - 4 2026-07-23
BCS1443 European Air Transport 4 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BCS25C BRU → LEJ Jul 26, 20:25 UTCJul 26, 21:15 UTC50m
2026-07-26 BCS870 BRU → LEJ Jul 26, 18:35 UTCJul 26, 19:20 UTC45m
2026-07-26 BCS2212 LEJ → LHR Jul 26, 15:35 UTCJul 26, 17:10 UTC1h 35m
2026-07-26 BCS5GU AMS → LEJ Jul 26, 10:05 UTCJul 26, 10:50 UTC45m
2026-07-25 BCS21G LEJ → AMS Jul 25, 02:30 UTCJul 25, 03:25 UTC55m
2026-07-24 BCS5GU AMS → LEJ Jul 24, 21:25 UTCJul 24, 22:20 UTC55m
2026-07-24 BCS1443 LEJ → LEJ Jul 24, 05:05 UTCJul 24, 05:55 UTC50m
2026-07-24 BCS8PA LEJ → STN Jul 24, 01:25 UTCJul 24, 02:40 UTC1h 15m
2026-07-23 BCS1LG LIS → LEJ Jul 23, 19:10 UTCJul 23, 22:10 UTC3h 0m
2026-07-23 BCS2FC - Jul 23, 05:15 UTCJul 23, 06:25 UTC1h 10m
2026-07-23 BCS73B LEJ → VIT Jul 23, 00:35 UTCJul 23, 02:45 UTC2h 10m
2026-07-22 BCS4VA LEJ → ARN Jul 22, 19:25 UTCJul 22, 20:50 UTC1h 25m
2026-07-22 BCS9CG LEJ → LEJ Jul 22, 02:50 UTCJul 22, 04:20 UTC1h 30m
2026-07-21 BCS44C CPH → LEJ Jul 21, 21:10 UTCJul 21, 22:05 UTC55m
2026-07-21 BCS822 MLA → LEJ Jul 21, 18:20 UTCJul 21, 19:10 UTC50m
2026-07-14 BCS7JG MAD → LEJ Jul 14, 20:15 UTCJul 14, 22:30 UTC2h 15m
2026-07-14 BCS41E BRU → MAD Jul 14, 01:30 UTCJul 14, 03:30 UTC2h 0m
2026-07-13 BCS8AA MXP → BRU Jul 13, 22:20 UTCJul 13, 23:25 UTC1h 5m
2026-07-13 BCS42M - Jul 13, 18:20 UTCJul 13, 19:40 UTC1h 20m
2026-07-13 BCS48D - Jul 13, 02:50 UTCJul 13, 04:05 UTC1h 15m
2026-07-12 BCS67R LEJ → MXP Jul 12, 21:35 UTCJul 12, 23:00 UTC1h 25m
2026-07-12 BCS5GU AMS → LEJ Jul 12, 10:20 UTCJul 12, 11:10 UTC50m
2026-07-11 BCS21G LEJ → AMS Jul 11, 02:25 UTCJul 11, 03:25 UTC1h 0m
2026-07-10 BCS39G - Jul 10, 22:10 UTCJul 10, 23:25 UTC1h 15m
2026-07-10 BCS35P MXP → LHR Jul 10, 18:30 UTCJul 10, 20:05 UTC1h 35m
2026-07-10 BCS6756 LTN → MXP Jul 10, 08:20 UTCJul 10, 09:50 UTC1h 30m
2026-07-10 BCS62B LEJ → LTN Jul 10, 02:25 UTCJul 10, 03:35 UTC1h 10m
2026-07-09 BCS44C CPH → LEJ Jul 9, 21:15 UTCJul 9, 22:00 UTC45m
2026-07-09 BCS20A LEJ → CPH Jul 9, 02:05 UTCJul 9, 03:00 UTC55m
2026-07-08 BCS5547 - Jul 8, 19:45 UTCJul 8, 20:40 UTC55m
2026-07-08 BCS5546 LEJ → WAW Jul 8, 02:55 UTCJul 8, 03:50 UTC55m
2026-07-07 BCS5GU - Jul 7, 21:35 UTCJul 7, 22:30 UTC55m
2026-07-07 BCS1443 - Jul 7, 05:05 UTCJul 7, 05:40 UTC35m
2026-07-07 BCS8PA LEJ → STN Jul 7, 01:25 UTCJul 7, 02:45 UTC1h 20m
2026-07-06 BCS4HG MXP → LEJ Jul 6, 22:25 UTCJul 6, 23:30 UTC1h 5m
2026-07-05 BCS6YG EMA → MXP Jul 5, 22:45 UTCJul 6, 00:15 UTC1h 30m
2026-07-03 BCS465 MXP → EMA Jul 3, 23:30 UTCJul 4, 01:10 UTC1h 40m
2026-07-02 BCS42M - Jul 2, 18:35 UTCJul 2, 19:35 UTC1h 0m
2026-07-02 BCS48D - Jul 2, 06:20 UTCJul 2, 07:40 UTC1h 20m
2026-07-02 BCS6GA BRU → MXP Jul 2, 01:10 UTCJul 2, 02:10 UTC1h 0m
2026-07-01 BCS2UR - Jul 1, 20:15 UTCJul 1, 22:10 UTC1h 55m
2026-07-01 BCS6360 - Jul 1, 15:45 UTCJul 1, 17:40 UTC1h 55m
2026-07-01 BCS6717 LTN → FRA Jul 1, 09:55 UTCJul 1, 11:05 UTC1h 10m
2026-07-01 BCS13G FRA → LTN Jul 1, 06:55 UTCJul 1, 08:00 UTC1h 5m
2026-07-01 BCS186 - Jul 1, 02:25 UTCJul 1, 03:15 UTC50m
2026-06-30 BCS9TC - Jun 30, 21:40 UTCJun 30, 23:35 UTC1h 55m
2026-06-30 BCS8166 - Jun 30, 19:15 UTCJun 30, 20:10 UTC55m
2026-06-30 BCS2FC - Jun 30, 05:30 UTCJun 30, 06:35 UTC1h 5m
2026-06-30 BCS73B - Jun 30, 00:35 UTCJun 30, 02:30 UTC1h 56m
2026-06-26 BCS854 EMA → LEJ Jun 26, 22:25 UTCJun 26, 23:49 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-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 Jul 26, 21:20 UTC.
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, BCS3UP, BCS2230, BCS5GU.