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 18d ago
Flights observed
417
Distinct callsigns
20
Country
DE
Last broadcast
18d 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
DLH2259 - 5 2026-06-21
DLH2258 - 5 2026-06-21
DLH93U - 4 2026-06-26
DLH8MC Lufthansa 4 2026-05-20
DLH8JA Lufthansa 4 2026-06-17
DLH7VX Lufthansa 4 2026-06-03
DLH7KJ Lufthansa 4 2026-06-06
DLH6KK - 4 2026-06-23
DLH4RX - 4 2026-06-23
DLH3YK Lufthansa 4 2026-06-17
DLH3EM Lufthansa 4 2026-06-07
DLH36M Lufthansa 4 2026-06-15
DLH33P - 4 2026-06-25
DLH9MC - 3 2026-06-29
DLH9JV - 3 2026-06-28
DLH9HH Lufthansa 3 2026-06-17
DLH95N - 3 2026-06-18
DLH8XM - 3 2026-06-25
DLH8VC Lufthansa 3 2026-05-11
DLH8RV Lufthansa 3 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-29 DLH9MC - Jun 29, 22:55 UTCJun 29, 23:54 UTC1h 0m
2026-06-29 DLH8M - Jun 29, 15:34 UTCJun 29, 16:29 UTC55m
2026-06-29 DLH5MJ - Jun 29, 13:39 UTCJun 29, 14:29 UTC50m
2026-06-29 DLH96K - Jun 29, 10:24 UTCJun 29, 12:09 UTC1h 45m
2026-06-29 DLH63M - Jun 29, 07:05 UTCJun 29, 08:50 UTC1h 45m
2026-06-29 DLH1715 TIA → MUC Jun 29, 04:30 UTCJun 29, 05:50 UTC1h 20m
2026-06-28 DLH1714 MUC → TIA Jun 28, 20:19 UTCJun 28, 21:24 UTC1h 5m
2026-06-28 DLH39T BCN → FRA Jun 28, 17:19 UTCJun 28, 18:44 UTC1h 25m
2026-06-28 DLH06C MUC → GRZ Jun 28, 14:45 UTCJun 28, 16:14 UTC1h 30m
2026-06-28 DLH2LX - Jun 28, 07:09 UTCJun 28, 08:39 UTC1h 30m
2026-06-28 DLH9JV - Jun 28, 04:44 UTCJun 28, 05:49 UTC1h 5m
2026-06-26 DLH05U BCN → MUC Jun 26, 17:19 UTCJun 26, 18:54 UTC1h 35m
2026-06-26 DLH77M - Jun 26, 14:25 UTCJun 26, 16:09 UTC1h 45m
2026-06-26 DLH1FF - Jun 26, 11:55 UTCJun 26, 12:44 UTC50m
2026-06-26 DLH3EE MUC → BRE Jun 26, 10:05 UTCJun 26, 11:05 UTC1h 0m
2026-06-26 DLH3LY FRA → LHR Jun 26, 08:10 UTCJun 26, 08:45 UTC35m
2026-06-26 DLH8ET STR → FRA Jun 26, 06:29 UTCJun 26, 07:10 UTC40m
2026-06-26 DLH93U NCE → MUC Jun 26, 04:20 UTCJun 26, 05:24 UTC1h 5m
2026-06-25 DLH33P MUC → NCE Jun 25, 20:30 UTCJun 25, 21:40 UTC1h 10m
2026-06-25 DLH6AN HAJ → MUC Jun 25, 18:15 UTCJun 25, 19:05 UTC50m
2026-06-25 DLH4HX MUC → HAJ Jun 25, 16:35 UTCJun 25, 17:25 UTC50m
2026-06-25 DLH3FN LCY → FRA Jun 25, 13:24 UTCJun 25, 15:20 UTC1h 55m
2026-06-25 DLH8XM MUC → ARN Jun 25, 10:30 UTCJun 25, 12:19 UTC1h 50m
2026-06-25 DLH4RV DUS → MUC Jun 25, 08:24 UTCJun 25, 09:14 UTC50m
2026-06-25 DLH2TY - Jun 25, 06:30 UTCJun 25, 07:25 UTC55m
2026-06-25 DLH8KY HAM → FRA Jun 25, 04:25 UTCJun 25, 05:00 UTC35m
2026-06-24 DLH6RY FRA → BLL Jun 24, 19:20 UTCJun 24, 19:55 UTC35m
2026-06-24 DLH88E MRS → MUC Jun 24, 16:54 UTCJun 24, 18:05 UTC1h 10m
2026-06-24 DLH07A MUC → MRS Jun 24, 14:09 UTCJun 24, 15:14 UTC1h 5m
2026-06-24 DLH4YV - Jun 24, 11:45 UTCJun 24, 12:40 UTC55m
2026-06-24 DLH7YW MUC → BUD Jun 24, 09:34 UTCJun 24, 10:30 UTC55m
2026-06-24 DLH2CH CPH → FRA Jun 24, 07:34 UTCJun 24, 08:04 UTC30m
2026-06-24 DLH2CH CPH → FRA Jun 24, 06:20 UTCJun 24, 06:50 UTC30m
2026-06-24 DLH1MA BUD → MUC Jun 24, 04:10 UTCJun 24, 05:15 UTC1h 5m
2026-06-23 DLH9MC MUC → BUD Jun 23, 20:29 UTCJun 23, 21:29 UTC1h 0m
2026-06-23 DLH1XN BER → MUC Jun 23, 18:14 UTCJun 23, 19:04 UTC50m
2026-06-23 DLH3X - Jun 23, 16:09 UTCJun 23, 16:59 UTC50m
2026-06-23 DLH6KK - Jun 23, 13:59 UTCJun 23, 14:59 UTC1h 0m
2026-06-23 DLH4RX - Jun 23, 11:40 UTCJun 23, 12:55 UTC1h 15m
2026-06-23 DLH1721 ZAD → MUC Jun 23, 09:45 UTCJun 23, 10:44 UTC1h 0m
2026-06-23 DLH1720 MUC → ZAD Jun 23, 07:55 UTCJun 23, 08:39 UTC45m
2026-06-23 DLH5E HAM → MUC Jun 23, 05:24 UTCJun 23, 06:29 UTC1h 5m
2026-06-22 DLH2CL MUC → HAM Jun 22, 18:35 UTCJun 22, 19:34 UTC1h 0m
2026-06-22 DLH08X - Jun 22, 16:29 UTCJun 22, 17:25 UTC55m
2026-06-22 DLH16A MUC → CDG Jun 22, 14:10 UTCJun 22, 15:20 UTC1h 10m
2026-06-22 DLH2LJ FRA → BER Jun 22, 12:00 UTCJun 22, 12:44 UTC45m
2026-06-22 DLH2ER MUC → DUS Jun 22, 09:49 UTCJun 22, 10:44 UTC55m
2026-06-22 DLH8MX - Jun 22, 07:45 UTCJun 22, 08:29 UTC45m
2026-06-22 DLH7KK - Jun 22, 05:40 UTCJun 22, 06:35 UTC55m
2026-06-21 DLH2259 BOD → MUC Jun 21, 18:10 UTCJun 21, 19:50 UTC1h 40m

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 18d 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 DLH2259, DLH2258, DLH93U, DLH8MC, DLH8JA.