Apparatus

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sensors Mode-S transponder

3C66A9

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUI · AIRBUS A-320

Hex
3C66A9
Octal
17063251
Decimal
3,958,441
Country
DE
Tail
D-AIUI
Type
A320
No current signal · last broadcast 2h ago
Flights observed
242
Distinct callsigns
20
Country
DE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 3C66A9.

Country allocation

The ICAO 24-bit address 3C66A9 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
DLH8MC Lufthansa 4 2026-05-20
DLH8VC Lufthansa 3 2026-05-11
DLH7VX Lufthansa 3 2026-05-17
DLH7KJ Lufthansa 3 2026-05-26
DLH6RM Lufthansa 3 2026-05-28
DLH3EM Lufthansa 3 2026-05-27
DLH36M Lufthansa 3 2026-05-31
DLH2N Lufthansa 3 2026-05-19
DLH1UW Lufthansa 3 2026-05-28
DLH1PJ Lufthansa 3 2026-05-30
DLH1ME Lufthansa 3 2026-05-30
DLH1LY Lufthansa 3 2026-05-11
DLH9LY Lufthansa 2 2026-05-29
DLH9JV Lufthansa 2 2026-05-30
DLH95N Lufthansa 2 2026-05-23
DLH8VV Lufthansa 2 2026-05-16
DLH8PN Lufthansa 2 2026-05-30
DLH8NP Lufthansa 2 2026-05-25
DLH8MX Lufthansa 2 2026-04-23
DLH8LY Lufthansa 2 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 DLH4HW MUC → STR Jun 2, 20:40 UTCJun 2, 21:05 UTC25m
2026-06-02 DLH8JA - Jun 2, 15:55 UTCJun 2, 16:50 UTC55m
2026-06-02 DLH3YK MUC → DUS Jun 2, 13:00 UTCJun 2, 13:45 UTC45m
2026-06-02 DLH29Y FRA → OPO Jun 2, 10:45 UTCJun 2, 11:45 UTC1h 0m
2026-06-02 DLH07T FRA → SZG Jun 2, 07:50 UTCJun 2, 09:05 UTC1h 15m
2026-06-02 DLH6NC CPH → FRA Jun 2, 04:25 UTCJun 2, 05:45 UTC1h 20m
2026-06-01 DLH8HA MUC → BUD Jun 1, 19:00 UTCJun 1, 20:10 UTC1h 10m
2026-06-01 DLH3YE HAM → FRA Jun 1, 16:25 UTCJun 1, 17:15 UTC50m
2026-06-01 DLH2TT HER → FRA Jun 1, 14:50 UTCJun 1, 15:30 UTC40m
2026-06-01 DLH1FF MUC → LJU Jun 1, 11:55 UTCJun 1, 12:55 UTC1h 0m
2026-06-01 DLH3EE FRA → SOF Jun 1, 10:10 UTCJun 1, 11:05 UTC55m
2026-06-01 DLH3M HAM → MUC Jun 1, 08:10 UTCJun 1, 09:05 UTC55m
2026-06-01 DLH3PK FMO → FRA Jun 1, 06:10 UTCJun 1, 07:05 UTC55m
2026-05-31 DLH36M OVD → MUC May 31, 18:05 UTCMay 31, 20:00 UTC1h 55m
2026-05-31 DLH02X MUC → MAD May 31, 14:40 UTCMay 31, 16:45 UTC2h 5m
2026-05-31 DLH4AK ZRH → MUC May 31, 09:15 UTCMay 31, 10:00 UTC45m
2026-05-30 DLH1JF MUC → CPH May 30, 20:10 UTCMay 30, 21:25 UTC1h 15m
2026-05-30 DLH8PN CPH → FRA May 30, 17:20 UTCMay 30, 19:00 UTC1h 40m
2026-05-30 DLH5UW ZAD → MUC May 30, 14:30 UTCMay 30, 16:20 UTC1h 50m
2026-05-30 DLH1ME ZAG → MUC May 30, 11:40 UTCMay 30, 12:25 UTC45m
2026-05-30 DLH1PJ GDN → FRA May 30, 09:55 UTCMay 30, 10:35 UTC40m
2026-05-30 DLH2LX HAJ → FRA May 30, 07:10 UTCMay 30, 08:35 UTC1h 25m
2026-05-30 DLH9JV FRA → DUS May 30, 04:55 UTCMay 30, 05:55 UTC1h 0m
2026-05-29 DLH7HV FRA → LHR May 29, 18:40 UTCMay 29, 19:45 UTC1h 5m
2026-05-29 DLH9LY FRA → ZRH May 29, 16:45 UTCMay 29, 17:35 UTC50m
2026-05-29 DLH3FN LCY → FRA May 29, 13:25 UTCMay 29, 15:10 UTC1h 45m
2026-05-29 DLH8XM MUC → ARN May 29, 10:30 UTCMay 29, 12:25 UTC1h 55m
2026-05-28 DLH09F VIE → MUC May 28, 19:20 UTCMay 28, 20:20 UTC1h 0m
2026-05-28 DLH06N FRA → GRZ May 28, 17:00 UTCMay 28, 18:15 UTC1h 15m
2026-05-28 DLH6RM FRA → EAP May 28, 14:40 UTCMay 28, 15:45 UTC1h 5m
2026-05-28 DLH1UW FRA → DUB May 28, 12:05 UTCMay 28, 13:10 UTC1h 5m
2026-05-28 DLH1775 IST → MUC May 28, 08:45 UTCMay 28, 10:35 UTC1h 50m
2026-05-28 DLH1774 MUC → IST May 28, 05:55 UTCMay 28, 07:35 UTC1h 40m
2026-05-27 DLH8WF MUC → ATH May 27, 17:10 UTCMay 27, 17:55 UTC45m
2026-05-27 DLH7T MUC → BER May 27, 14:50 UTCMay 27, 15:40 UTC50m
2026-05-27 DLH61A MUC → OPO May 27, 10:15 UTCMay 27, 12:45 UTC2h 30m
2026-05-27 DLH38J BCN → FRA May 27, 06:34 UTCMay 27, 09:05 UTC2h 31m
2026-05-27 DLH3EM LEJ → FRA May 27, 04:24 UTCMay 27, 05:29 UTC1h 5m
2026-05-26 DLH7KJ HAM → FRA May 26, 19:50 UTCMay 26, 20:50 UTC1h 0m
2026-05-26 DLH4NV VCE → FRA May 26, 16:30 UTCMay 26, 18:24 UTC1h 55m
2026-05-26 DLH3FU MUC → BGO May 26, 13:45 UTCMay 26, 15:39 UTC1h 55m
2026-05-26 DLH1913 OLB → MUC May 26, 10:05 UTCMay 26, 11:15 UTC1h 10m
2026-05-26 DLH1912 MUC → OLB May 26, 07:45 UTCMay 26, 08:45 UTC1h 0m
2026-05-26 DLH7LA STR → MUC May 26, 04:24 UTCMay 26, 05:15 UTC50m
2026-05-25 DLH8NP MUC → DUS May 25, 17:40 UTCMay 25, 18:30 UTC50m
2026-05-25 DLH5AH AMS → MUC May 25, 15:25 UTCMay 25, 16:25 UTC1h 0m
2026-05-25 DLH6JF FRA → BER May 25, 13:10 UTCMay 25, 14:15 UTC1h 5m
2026-05-25 DLH4E HAM → MUC May 25, 10:25 UTCMay 25, 11:30 UTC1h 5m
2026-05-25 DLH1JH FRA → VCE May 25, 08:30 UTCMay 25, 09:30 UTC1h 0m
2026-05-25 DLH5HV FRA → HAM May 25, 05:35 UTCMay 25, 06:25 UTC50m

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

Mode-S 3C66A9 frequently asked

What is Mode-S code 3C66A9?
3C66A9 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUI.
Where is Mode-S 3C66A9 registered?
Mode-S code 3C66A9 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66A9 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66A9, octal 17063251, decimal 3,958,441.
What flights does 3C66A9 operate?
Mode-S 3C66A9 has broadcast 20 distinct callsigns, including DLH8MC, DLH8VC, DLH7VX, DLH7KJ, DLH6RM.