Apparatus

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sensors Mode-S transponder

3C66C4

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIVD · AIRBUS A-350-900

Hex
3C66C4
Octal
17063304
Decimal
3,958,468
Country
DE
Tail
D-AIVD
Type
A359
No current signal · last broadcast 3h ago
Flights observed
95
Distinct callsigns
10
Country
DE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 3C66C4.

Country allocation

The ICAO 24-bit address 3C66C4 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 10 distinct

Callsign Airline Flights Last seen
DLH767 Lufthansa 14 2026-05-23
DLH766 Lufthansa 14 2026-05-23
DLH477 Lufthansa 13 2026-06-02
DLH476 Lufthansa 13 2026-06-02
DLH475 Lufthansa 11 2026-06-01
DLH4J Lufthansa 10 2026-05-31
DLH4W Lufthansa 9 2026-05-30
DLH428 Lufthansa 6 2026-05-30
DLH494 Lufthansa 3 2026-05-28
DLH495 Lufthansa 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 DLH476 MUC → YVR Jun 2, 14:25 UTCJun 2, 16:20 UTC1h 55m
2026-06-02 DLH477 YVR → MUC Jun 2, 02:15 UTCJun 2, 11:25 UTC9h 10m
2026-06-01 DLH476 MUC → YVR Jun 1, 14:10 UTCJun 2, 00:05 UTC9h 55m
2026-06-01 DLH475 YUL → MUC Jun 1, 02:25 UTCJun 1, 09:15 UTC6h 50m
2026-05-31 DLH4J MUC → YUL May 31, 16:40 UTCJun 1, 00:05 UTC7h 25m
2026-05-30 DLH4W BRU → FRA May 30, 23:10 UTCMay 31, 01:11 UTC2h 1m
2026-05-30 DLH428 MUC → CLT May 30, 11:55 UTCMay 30, 20:35 UTC8h 40m
2026-05-30 DLH475 YUL → MUC May 30, 02:35 UTCMay 30, 08:50 UTC6h 15m
2026-05-30 DLH475 YUL → MUC May 30, 01:35 UTCMay 30, 02:30 UTC55m
2026-05-29 DLH4J MUC → YUL May 29, 15:05 UTCMay 29, 22:35 UTC7h 30m
2026-05-29 DLH495 YYZ → MUC May 29, 01:05 UTCMay 29, 08:30 UTC7h 25m
2026-05-28 DLH494 MUC → YYZ May 28, 14:40 UTCMay 28, 22:25 UTC7h 45m
2026-05-28 DLH477 YVR → MUC May 28, 02:20 UTCMay 28, 11:30 UTC9h 10m
2026-05-27 DLH476 MUC → YVR May 27, 14:15 UTCMay 28, 00:20 UTC10h 5m
2026-05-27 DLH477 YVR → MUC May 27, 02:19 UTCMay 27, 11:20 UTC9h 0m
2026-05-26 DLH476 MUC → YVR May 26, 14:14 UTCMay 26, 20:05 UTC5h 50m
2026-05-26 DLH477 YVR → MUC May 26, 02:00 UTCMay 26, 11:09 UTC9h 10m
2026-05-25 DLH476 MUC → YVR May 25, 14:10 UTCMay 26, 00:09 UTC10h 0m
2026-05-25 DLH4W BRU → FRA May 25, 01:55 UTCMay 25, 08:00 UTC6h 5m
2026-05-24 DLH428 MUC → CLT May 24, 11:50 UTCMay 24, 20:55 UTC9h 5m
2026-05-23 DLH767 BOM → MUC May 23, 21:35 UTCMay 24, 03:20 UTC5h 45m
2026-05-23 DLH766 MUC → BOM May 23, 10:40 UTCMay 23, 18:10 UTC7h 30m
2026-05-22 DLH4W BRU → FRA May 22, 23:15 UTCMay 23, 06:55 UTC7h 39m
2026-05-22 DLH428 MUC → CLT May 22, 11:35 UTCMay 22, 20:30 UTC8h 55m
2026-05-21 DLH475 YUL → MUC May 21, 01:15 UTCMay 21, 07:45 UTC6h 30m
2026-05-20 DLH4J MUC → YUL May 20, 15:15 UTCMay 20, 23:15 UTC8h 0m
2026-05-20 DLH477 YVR → MUC May 20, 02:10 UTCMay 20, 11:35 UTC9h 26m
2026-05-19 DLH476 MUC → YVR May 19, 14:30 UTCMay 19, 23:50 UTC9h 20m
2026-05-19 DLH475 YUL → MUC May 19, 01:10 UTCMay 19, 08:05 UTC6h 55m
2026-05-18 DLH4J MUC → YUL May 18, 14:55 UTCMay 18, 22:20 UTC7h 24m
2026-05-18 DLH475 YUL → MUC May 18, 01:15 UTCMay 18, 08:01 UTC6h 45m
2026-05-17 DLH4J MUC → YUL May 17, 15:31 UTCMay 17, 22:55 UTC7h 25m
2026-05-17 DLH477 YVR → MUC May 17, 02:05 UTCMay 17, 11:25 UTC9h 20m
2026-05-16 DLH476 MUC → YVR May 16, 14:31 UTCMay 17, 00:00 UTC9h 30m
2026-05-16 DLH477 YVR → MUC May 16, 02:05 UTCMay 16, 11:25 UTC9h 21m
2026-05-15 DLH476 MUC → YVR May 15, 14:20 UTCMay 16, 00:05 UTC9h 44m
2026-05-15 DLH477 YVR → MUC May 15, 03:00 UTCMay 15, 11:25 UTC8h 25m
2026-05-15 DLH477 YVR → MUC May 15, 02:10 UTCMay 15, 02:25 UTC15m
2026-05-14 DLH476 MUC → YVR May 14, 14:15 UTCMay 15, 00:00 UTC9h 45m
2026-05-14 DLH495 YYZ → MUC May 14, 01:15 UTCMay 14, 08:40 UTC7h 25m
2026-05-13 DLH494 MUC → YYZ May 13, 21:40 UTCMay 13, 22:55 UTC1h 15m
2026-05-13 DLH494 MUC → YYZ May 13, 14:55 UTCMay 13, 21:35 UTC6h 40m
2026-05-12 DLH767 BOM → MUC May 12, 11:05 UTCMay 13, 05:25 UTC18h 20m
2026-05-12 DLH767 BOM → MUC May 12, 10:45 UTCMay 13, 05:25 UTC18h 40m
2026-05-12 DLH475 YUL → MUC May 12, 05:20 UTCMay 12, 07:35 UTC2h 15m
2026-05-11 DLH4J MUC → YUL May 11, 15:05 UTCMay 11, 22:35 UTC7h 30m
2026-05-11 DLH477 YVR → MUC May 11, 02:30 UTCMay 11, 11:50 UTC9h 20m
2026-05-10 DLH476 MUC → YVR May 10, 14:14 UTCMay 11, 00:05 UTC9h 50m
2026-05-10 DLH477 YVR → MUC May 10, 02:00 UTCMay 10, 11:15 UTC9h 15m
2026-05-09 DLH476 MUC → YVR May 9, 14:20 UTCMay 10, 00:09 UTC9h 50m

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

Mode-S 3C66C4 frequently asked

What is Mode-S code 3C66C4?
3C66C4 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIVD.
Where is Mode-S 3C66C4 registered?
Mode-S code 3C66C4 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66C4 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66C4, octal 17063304, decimal 3,958,468.
What flights does 3C66C4 operate?
Mode-S 3C66C4 has broadcast 10 distinct callsigns, including DLH767, DLH766, DLH477, DLH476, DLH475.