Apparatus

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sensors Mode-S transponder

3C66A4

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUD · AIRBUS A-320

Hex
3C66A4
Octal
17063244
Decimal
3,958,436
Country
DE
Tail
D-AIUD
Type
A320
No current signal · last broadcast 54m ago
Flights observed
284
Distinct callsigns
20
Country
DE
Last broadcast
54m ago

Last known position

Most recent position reported by Mode-S 3C66A4.

Country allocation

The ICAO 24-bit address 3C66A4 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
DLH5HV Lufthansa 5 2026-05-16
DLH33P Lufthansa 5 2026-05-30
DLH9XC Lufthansa 4 2026-06-02
DLH99H Lufthansa 4 2026-04-30
DLH93U Lufthansa 4 2026-05-21
DLH8PN Lufthansa 4 2026-05-26
DLH8NP Lufthansa 4 2026-05-15
DLH8MC Lufthansa 4 2026-05-29
DLH7FM Lufthansa 4 2026-05-28
DLH6NJ Lufthansa 4 2026-05-30
DLH6CJ Lufthansa 4 2026-06-02
DLH5UW Lufthansa 4 2026-05-26
DLH4T Lufthansa 4 2026-05-19
DLH4LY Lufthansa 4 2026-05-26
DLH4KX Lufthansa 4 2026-05-25
DLH1PP Lufthansa 4 2026-05-30
DLH1JF Lufthansa 4 2026-05-27
DLH06H Lufthansa 4 2026-04-30
DLH96V Lufthansa 3 2026-05-17
DLH8YH Lufthansa 3 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 DLH1WR BER → FRA Jun 2, 17:55 UTCJun 2, 19:00 UTC1h 5m
2026-06-02 DLH6CJ FRA → LHR Jun 2, 15:25 UTCJun 2, 16:45 UTC1h 20m
2026-06-02 DLH9XC FRA → MXP Jun 2, 13:15 UTCJun 2, 14:25 UTC1h 10m
2026-06-02 DLH7ET STR → MUC Jun 2, 11:35 UTCJun 2, 12:05 UTC30m
2026-06-02 DLH2KH MUC → WRO Jun 2, 10:05 UTCJun 2, 10:30 UTC25m
2026-06-02 DLH1RY SUF → MUC Jun 2, 07:50 UTCJun 2, 08:40 UTC50m
2026-06-02 DLH2NM LUX → FRA Jun 2, 06:10 UTCJun 2, 06:50 UTC40m
2026-06-02 DLH1KV MUC → MAN Jun 2, 03:25 UTCJun 2, 05:15 UTC1h 50m
2026-06-01 DLH1CK WAW → FRA Jun 1, 19:15 UTCJun 1, 20:40 UTC1h 25m
2026-06-01 DLH04J FRA → MRS Jun 1, 16:55 UTCJun 1, 18:00 UTC1h 5m
2026-06-01 DLH99X MUC → MAD Jun 1, 14:15 UTCJun 1, 15:20 UTC1h 5m
2026-06-01 DLH7M HAM → MUC Jun 1, 11:30 UTCJun 1, 12:30 UTC1h 0m
2026-06-01 DLH4JW FRA → BER Jun 1, 09:35 UTCJun 1, 10:30 UTC55m
2026-06-01 DLH2PR MUC → TIV Jun 1, 07:15 UTCJun 1, 08:15 UTC1h 0m
2026-06-01 DLH4AN MUC → BRE Jun 1, 05:20 UTCJun 1, 06:20 UTC1h 0m
2026-05-31 DLH9M HAM → MUC May 31, 18:35 UTCMay 31, 19:30 UTC55m
2026-05-31 DLH9KL FRA → HAM May 31, 16:25 UTCMay 31, 17:25 UTC1h 0m
2026-05-31 DLH4CF ATH → FRA May 31, 12:00 UTCMay 31, 14:30 UTC2h 30m
2026-05-31 DLH4EE FRA → SOF May 31, 08:25 UTCMay 31, 10:15 UTC1h 50m
2026-05-30 DLH33P MUC → NCE May 30, 20:15 UTCMay 30, 21:15 UTC1h 0m
2026-05-30 DLH1713 TIA → MUC May 30, 16:50 UTCMay 30, 18:15 UTC1h 25m
2026-05-30 DLH1712 MUC → TIA May 30, 14:10 UTCMay 30, 15:30 UTC1h 20m
2026-05-30 DLH1PP OTP → FRA May 30, 11:45 UTCMay 30, 12:45 UTC1h 0m
2026-05-30 DLH6NJ FRA → SJJ May 30, 09:50 UTCMay 30, 10:50 UTC1h 0m
2026-05-30 DLH7HP HAM → FRA May 30, 07:00 UTCMay 30, 08:35 UTC1h 35m
2026-05-30 DLH6VT MUC → CPH May 30, 04:35 UTCMay 30, 05:50 UTC1h 15m
2026-05-29 DLH09F VIE → MUC May 29, 19:15 UTCMay 29, 20:20 UTC1h 5m
2026-05-29 DLH06N FRA → GRZ May 29, 16:50 UTCMay 29, 18:05 UTC1h 15m
2026-05-29 DLH4RK FRA → MXP May 29, 13:45 UTCMay 29, 15:30 UTC1h 46m
2026-05-29 DLH8UE MUC → OSL May 29, 10:40 UTCMay 29, 12:35 UTC1h 55m
2026-05-29 DLH4RV FRA → BER May 29, 08:40 UTCMay 29, 09:30 UTC50m
2026-05-29 DLH2TY FRA → SUF May 29, 06:55 UTCMay 29, 07:45 UTC50m
2026-05-29 DLH8MC FCO → MUC May 29, 04:20 UTCMay 29, 05:10 UTC50m
2026-05-28 DLH2N MUC → BER May 28, 18:25 UTCMay 28, 19:10 UTC45m
2026-05-28 DLH1745 TUN → MUC May 28, 07:10 UTCMay 28, 12:10 UTC5h 0m
2026-05-28 DLH7FM CPH → MUC May 28, 04:10 UTCMay 28, 05:25 UTC1h 15m
2026-05-27 DLH1JF MUC → CPH May 27, 20:00 UTCMay 27, 21:15 UTC1h 15m
2026-05-27 DLH05U CDG → MUC May 27, 16:55 UTCMay 27, 18:40 UTC1h 45m
2026-05-27 DLH77M FRA → VLC May 27, 14:00 UTCMay 27, 15:45 UTC1h 45m
2026-05-27 DLH2LJ FRA → BER May 27, 11:50 UTCMay 27, 12:40 UTC50m
2026-05-27 DLH2ER ZRH → MUC May 27, 09:55 UTCMay 27, 10:45 UTC50m
2026-05-27 DLH8MX HAM → FRA May 27, 07:55 UTCMay 27, 08:45 UTC50m
2026-05-27 DLH7KK FRA → EDI May 27, 05:59 UTCMay 27, 06:55 UTC55m
2026-05-26 DLH8PN CPH → FRA May 26, 16:55 UTCMay 26, 18:50 UTC1h 55m
2026-05-26 DLH5UW ZAD → MUC May 26, 14:14 UTCMay 26, 16:00 UTC1h 45m
2026-05-26 DLH3NC CPH → FRA May 26, 10:10 UTCMay 26, 11:44 UTC1h 35m
2026-05-26 DLH4JA MUC → OTP May 26, 07:24 UTCMay 26, 08:59 UTC1h 35m
2026-05-26 DLH4LY MUC → SUF May 26, 04:10 UTCMay 26, 05:10 UTC1h 0m
2026-05-25 DLH4KX NAP → FRA May 25, 20:45 UTCMay 25, 21:49 UTC1h 5m
2026-05-25 DLH8PN CPH → FRA May 25, 16:55 UTCMay 25, 18:50 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-AIUD page for operator, model, and routing details .

Mode-S 3C66A4 frequently asked

What is Mode-S code 3C66A4?
3C66A4 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUD.
Where is Mode-S 3C66A4 registered?
Mode-S code 3C66A4 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66A4 broadcasting right now?
No active broadcast right now. Last signal was 54m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66A4, octal 17063244, decimal 3,958,436.
What flights does 3C66A4 operate?
Mode-S 3C66A4 has broadcast 20 distinct callsigns, including DLH5HV, DLH33P, DLH9XC, DLH99H, DLH93U.