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sensors Mode-S transponder

3CEA42

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-CQAC · LEARJET 45

Hex
3CEA42
Octal
17165102
Decimal
3,992,130
Country
DE
Tail
D-CQAC
Type
LJ45
No current signal · last broadcast 14h ago
Flights observed
79
Distinct callsigns
1
Country
DE
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 3CEA42.

Country allocation

The ICAO 24-bit address 3CEA42 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 1 distinct

Callsign Airline Flights Last seen
QAJ3 - 79 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 QAJ3 - Jul 17, 11:20 UTCJul 17, 11:45 UTC25m
2026-07-17 QAJ3 - Jul 17, 09:10 UTCJul 17, 10:25 UTC1h 15m
2026-07-17 QAJ3 CGN → RZE Jul 17, 06:40 UTCJul 17, 08:00 UTC1h 20m
2026-07-16 QAJ3 - Jul 16, 13:54 UTCJul 16, 14:50 UTC55m
2026-07-16 QAJ3 DUB → BER Jul 16, 11:34 UTCJul 16, 13:20 UTC1h 45m
2026-07-16 QAJ3 CGN → DUB Jul 16, 09:00 UTCJul 16, 10:25 UTC1h 25m
2026-07-15 QAJ3 BRU → CGN Jul 15, 15:30 UTCJul 15, 15:55 UTC25m
2026-07-15 QAJ3 - Jul 15, 11:15 UTCJul 15, 13:35 UTC2h 20m
2026-07-15 QAJ3 - Jul 15, 06:15 UTCJul 15, 08:55 UTC2h 40m
2026-07-10 QAJ3 ANR → CGN Jul 10, 15:25 UTCJul 10, 15:50 UTC25m
2026-07-10 QAJ3 - Jul 10, 11:45 UTCJul 10, 14:05 UTC2h 20m
2026-07-10 QAJ3 - Jul 10, 10:30 UTCJul 10, 10:50 UTC20m
2026-07-10 QAJ3 - Jul 10, 06:05 UTCJul 10, 08:45 UTC2h 40m
2026-07-08 QAJ3 - Jul 8, 15:50 UTCJul 8, 16:25 UTC35m
2026-07-08 QAJ3 - Jul 8, 12:20 UTCJul 8, 13:20 UTC1h 0m
2026-07-08 QAJ3 CGN → CPH Jul 8, 08:00 UTCJul 8, 09:05 UTC1h 5m
2026-07-07 QAJ3 - Jul 7, 16:10 UTCJul 7, 16:30 UTC20m
2026-07-07 QAJ3 - Jul 7, 13:50 UTCJul 7, 15:35 UTC1h 45m
2026-07-07 QAJ3 - Jul 7, 07:15 UTCJul 7, 09:00 UTC1h 45m
2026-07-03 QAJ3 - Jul 3, 12:30 UTCJul 3, 16:15 UTC3h 45m
2026-07-03 QAJ3 - Jul 3, 06:50 UTCJul 3, 10:45 UTC3h 55m
2026-07-02 QAJ3 - Jul 2, 12:00 UTCJul 2, 12:45 UTC45m
2026-07-02 QAJ3 - Jul 2, 09:35 UTCJul 2, 11:10 UTC1h 35m
2026-07-02 QAJ3 - Jul 2, 06:41 UTCJul 2, 08:40 UTC1h 59m
2026-07-01 QAJ3 - Jul 1, 12:35 UTCJul 2, 08:40 UTC20h 5m
2026-07-01 QAJ3 - Jul 1, 10:35 UTCJul 2, 08:40 UTC22h 5m
2026-07-01 QAJ3 - Jul 1, 10:15 UTCJul 2, 08:30 UTC22h 15m
2026-06-27 QAJ3 - Jun 27, 13:40 UTCJun 27, 14:25 UTC45m
2026-06-27 QAJ3 - Jun 27, 11:55 UTCJun 27, 13:04 UTC1h 10m
2026-06-27 QAJ3 - Jun 27, 10:40 UTCJun 27, 10:54 UTC15m
2026-06-27 QAJ3 - Jun 27, 08:14 UTCJun 27, 09:50 UTC1h 35m
2026-06-26 QAJ3 - Jun 26, 14:50 UTCJun 26, 15:10 UTC20m
2026-06-26 QAJ3 FAO → FRA Jun 26, 10:44 UTCJun 26, 13:10 UTC2h 25m
2026-06-26 QAJ3 CGN → FAO Jun 26, 05:50 UTCJun 26, 08:30 UTC2h 40m
2026-06-25 QAJ3 GRQ → CGN Jun 25, 13:59 UTCJun 25, 14:29 UTC30m
2026-06-25 QAJ3 - Jun 25, 10:50 UTCJun 25, 13:20 UTC2h 30m
2026-06-25 QAJ3 - Jun 25, 07:09 UTCJun 25, 09:40 UTC2h 30m
2026-06-24 QAJ3 TZX → CGN Jun 24, 14:39 UTCJun 24, 18:25 UTC3h 45m
2026-06-24 QAJ3 - Jun 24, 06:10 UTCJun 24, 13:50 UTC7h 40m
2026-06-24 QAJ3 - Jun 24, 02:09 UTCJun 24, 05:05 UTC2h 55m
2026-06-22 QAJ3 - Jun 22, 18:19 UTCJun 22, 22:54 UTC4h 35m
2026-06-22 QAJ3 TZX → LKO Jun 22, 11:09 UTCJun 22, 17:29 UTC6h 20m
2026-06-22 QAJ3 - Jun 22, 10:25 UTCJun 22, 10:34 UTC10m
2026-06-22 QAJ3 - Jun 22, 07:10 UTCJun 22, 09:49 UTC2h 40m
2026-06-14 QAJ3 - Jun 14, 14:35 UTCJun 14, 15:00 UTC25m
2026-06-14 QAJ3 - Jun 14, 11:45 UTCJun 14, 14:00 UTC2h 15m
2026-06-14 QAJ3 CGN → HEL Jun 14, 07:55 UTCJun 14, 09:50 UTC1h 55m
2026-06-13 QAJ3 - Jun 13, 15:05 UTCJun 13, 15:30 UTC25m
2026-06-13 QAJ3 - Jun 13, 12:25 UTCJun 13, 14:25 UTC2h 0m
2026-06-13 QAJ3 - Jun 13, 07:35 UTCJun 13, 09:30 UTC1h 55m

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

Mode-S 3CEA42 frequently asked

What is Mode-S code 3CEA42?
3CEA42 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-CQAC.
Where is Mode-S 3CEA42 registered?
Mode-S code 3CEA42 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3CEA42 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3CEA42, octal 17165102, decimal 3,992,130.
What flights does 3CEA42 operate?
Mode-S 3CEA42 has broadcast 1 distinct callsign, including QAJ3.