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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
Broadcasting now · callsign DLH475 · 39,000 ft
Flights observed
201
Distinct callsigns
10
Country
DE
Last broadcast
Jul 26, 23:00 UTC

Current position

3C66C4 is currently broadcasting. Map zoomed to live position.

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
DLH477 - 25 2026-07-17
DLH475 Lufthansa 24 2026-07-24
DLH476 - 23 2026-07-16
DLH4J - 22 2026-07-23
DLH767 - 19 2026-06-29
DLH766 Lufthansa 19 2026-06-29
DLH4W Lufthansa 19 2026-07-24
DLH495 Lufthansa 17 2026-07-26
DLH494 Lufthansa 17 2026-07-26
DLH428 - 16 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DLH494 MUC → YYZ Jul 26, 14:25 UTCJul 26, 22:40 UTC8h 15m
2026-07-26 DLH495 YYZ → MUC Jul 26, 01:10 UTCJul 26, 08:20 UTC7h 11m
2026-07-25 DLH494 MUC → YYZ Jul 25, 14:45 UTCJul 25, 23:00 UTC8h 15m
2026-07-24 DLH4W BRU → FRA Jul 24, 23:00 UTCJul 25, 06:50 UTC7h 50m
2026-07-24 DLH428 - Jul 24, 11:20 UTCJul 24, 20:10 UTC8h 50m
2026-07-24 DLH475 YUL → MUC Jul 24, 01:05 UTCJul 24, 07:40 UTC6h 35m
2026-07-23 DLH4J - Jul 23, 15:10 UTCJul 23, 22:40 UTC7h 30m
2026-07-22 DLH4W - Jul 22, 23:25 UTCJul 23, 07:25 UTC8h 0m
2026-07-22 DLH428 - Jul 22, 11:35 UTCJul 22, 20:45 UTC9h 10m
2026-07-21 DLH4W - Jul 21, 23:20 UTCJul 22, 05:25 UTC6h 5m
2026-07-21 DLH428 - Jul 21, 11:25 UTCJul 21, 20:30 UTC9h 5m
2026-07-21 DLH475 YUL → MUC Jul 21, 01:15 UTCJul 21, 07:55 UTC6h 40m
2026-07-20 DLH4J - Jul 20, 15:10 UTCJul 20, 22:40 UTC7h 30m
2026-07-19 DLH4W - Jul 19, 23:05 UTCJul 20, 07:05 UTC8h 0m
2026-07-19 DLH428 - Jul 19, 11:20 UTCJul 19, 20:20 UTC9h 0m
2026-07-19 DLH495 - Jul 19, 01:10 UTCJul 19, 08:25 UTC7h 15m
2026-07-18 DLH494 - Jul 18, 14:30 UTCJul 18, 22:40 UTC8h 10m
2026-07-18 DLH475 YUL → MUC Jul 18, 01:34 UTCJul 18, 08:25 UTC6h 51m
2026-07-17 DLH4J MUC → YUL Jul 17, 15:15 UTCJul 17, 22:49 UTC7h 35m
2026-07-17 DLH477 YVR → MUC Jul 17, 02:34 UTCJul 17, 12:10 UTC9h 35m
2026-07-16 DLH476 - Jul 16, 14:15 UTCJul 16, 23:55 UTC9h 40m
2026-07-16 DLH475 - Jul 16, 01:20 UTCJul 16, 08:15 UTC6h 55m
2026-07-15 DLH4J - Jul 15, 15:10 UTCJul 15, 22:25 UTC7h 15m
2026-07-15 DLH477 - Jul 15, 02:00 UTCJul 15, 11:25 UTC9h 25m
2026-07-14 DLH476 MUC → YVR Jul 14, 14:10 UTCJul 15, 00:05 UTC9h 54m
2026-07-14 DLH495 - Jul 14, 03:05 UTCJul 14, 09:00 UTC5h 55m
2026-07-14 DLH495 - Jul 14, 01:20 UTCJul 14, 03:00 UTC1h 40m
2026-07-13 DLH494 - Jul 13, 14:10 UTCJul 13, 22:05 UTC7h 55m
2026-07-13 DLH477 - Jul 13, 02:25 UTCJul 13, 11:30 UTC9h 5m
2026-07-12 DLH476 MUC → YVR Jul 12, 14:15 UTCJul 13, 00:10 UTC9h 55m
2026-07-12 DLH475 YUL → MUC Jul 12, 01:00 UTCJul 12, 07:45 UTC6h 45m
2026-07-11 DLH4J MUC → YUL Jul 11, 15:00 UTCJul 11, 22:30 UTC7h 30m
2026-07-11 DLH475 - Jul 11, 02:10 UTCJul 11, 07:50 UTC5h 40m
2026-07-11 DLH475 - Jul 11, 01:10 UTCJul 11, 02:05 UTC55m
2026-07-10 DLH4J MUC → YUL Jul 10, 15:05 UTCJul 10, 22:45 UTC7h 40m
2026-07-10 DLH477 YVR → MUC Jul 10, 02:00 UTCJul 10, 11:15 UTC9h 15m
2026-07-09 DLH476 - Jul 9, 14:15 UTCJul 9, 23:55 UTC9h 40m
2026-07-09 DLH475 YUL → MUC Jul 9, 01:15 UTCJul 9, 08:05 UTC6h 50m
2026-07-08 DLH4J MUC → YUL Jul 8, 15:15 UTCJul 8, 22:45 UTC7h 30m
2026-07-08 DLH4W - Jul 8, 00:05 UTCJul 8, 08:20 UTC8h 15m
2026-07-07 DLH428 - Jul 7, 11:30 UTCJul 7, 20:30 UTC9h 0m
2026-07-06 DLH4W - Jul 6, 23:45 UTCJul 7, 07:40 UTC7h 55m
2026-07-06 DLH428 - Jul 6, 11:20 UTCJul 6, 20:25 UTC9h 5m
2026-07-06 DLH4W - Jul 6, 00:20 UTCJul 6, 08:05 UTC7h 45m
2026-07-05 DLH428 - Jul 5, 11:25 UTCJul 5, 21:05 UTC9h 40m
2026-07-04 DLH4W - Jul 4, 23:00 UTCJul 5, 06:55 UTC7h 55m
2026-07-04 DLH428 - Jul 4, 11:25 UTCJul 4, 20:45 UTC9h 20m
2026-07-04 DLH495 YYZ → MUC Jul 4, 01:40 UTCJul 4, 08:45 UTC7h 5m
2026-07-03 DLH494 - Jul 3, 14:30 UTCJul 3, 23:10 UTC8h 40m
2026-07-03 DLH477 - Jul 3, 02:30 UTCJul 3, 11:40 UTC9h 10m

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?
Yes. Mode-S 3C66C4 is currently airborne.
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 DLH477, DLH475, DLH476, DLH4J, DLH767.