Apparatus

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sensors Mode-S transponder

3C6655

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIRU · AIRBUS A-321

Hex
3C6655
Octal
17063125
Decimal
3,958,357
Country
DE
Tail
D-AIRU
Type
A321
No current signal · last broadcast 5h ago
Flights observed
429
Distinct callsigns
20
Country
DE
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 3C6655.

Country allocation

The ICAO 24-bit address 3C6655 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
DLH78H Lufthansa 5 2026-06-11
DLH74U Lufthansa 5 2026-06-10
DLH3PF Lufthansa 5 2026-05-29
DLH9LL Lufthansa 4 2026-05-29
DLH9KK Lufthansa 4 2026-06-07
DLH979 - 4 2026-06-27
DLH81H - 4 2026-06-23
DLH6JT - 4 2026-06-25
DLH67K - 4 2026-06-22
DLH4P - 4 2026-06-25
DLH3WU Lufthansa 4 2026-06-07
DLH99M - 3 2026-06-28
DLH978 - 3 2026-06-27
DLH93V - 3 2026-06-28
DLH7FL Lufthansa 3 2026-06-15
DLH6UL Lufthansa 3 2026-06-17
DLH6PJ - 3 2026-06-28
DLH6KA Lufthansa 3 2026-05-23
DLH6HE Lufthansa 3 2026-06-17
DLH5MM - 3 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DLH3EY MUC → HAM Jul 14, 20:15 UTCJul 14, 21:15 UTC1h 0m
2026-07-14 DLH48H FAO → MUC Jul 14, 15:30 UTCJul 14, 18:00 UTC2h 30m
2026-07-14 DLH98J - Jul 14, 11:10 UTCJul 14, 14:05 UTC2h 55m
2026-07-14 DLH2PR - Jul 14, 07:35 UTCJul 14, 08:35 UTC1h 0m
2026-07-14 DLH4AN MUC → BRE Jul 14, 05:30 UTCJul 14, 06:30 UTC1h 0m
2026-07-13 DLH7HV DUS → MUC Jul 13, 18:35 UTCJul 13, 19:25 UTC50m
2026-07-13 DLH9LY - Jul 13, 16:50 UTCJul 13, 17:45 UTC55m
2026-07-13 DLH3E - Jul 13, 13:30 UTCJul 13, 14:30 UTC1h 0m
2026-07-13 DLH5LL MUC → HAM Jul 13, 11:30 UTCJul 13, 12:30 UTC1h 0m
2026-07-13 DLH9E - Jul 13, 09:05 UTCJul 13, 10:05 UTC1h 0m
2026-07-13 DLH1MK MUC → HAM Jul 13, 07:01 UTCJul 13, 08:01 UTC1h 0m
2026-07-12 DLH98Y - Jul 12, 17:10 UTCJul 12, 18:50 UTC1h 40m
2026-07-12 DLH09W - Jul 12, 13:55 UTCJul 12, 15:50 UTC1h 55m
2026-07-12 DLH57P - Jul 12, 10:10 UTCJul 12, 12:05 UTC1h 55m
2026-07-12 DLH95N MUC → MAD Jul 12, 06:45 UTCJul 12, 08:55 UTC2h 10m
2026-07-12 DLH1MA BUD → MUC Jul 12, 04:15 UTCJul 12, 05:20 UTC1h 5m
2026-07-11 DLH9MC MUC → BUD Jul 11, 20:30 UTCJul 11, 21:20 UTC50m
2026-07-11 DLH1745 - Jul 11, 17:10 UTCJul 11, 18:50 UTC1h 40m
2026-07-11 DLH1744 - Jul 11, 13:50 UTCJul 11, 15:35 UTC1h 45m
2026-07-11 DLH1KX - Jul 11, 10:10 UTCJul 11, 11:40 UTC1h 30m
2026-07-11 DLH6YW - Jul 11, 07:30 UTCJul 11, 09:05 UTC1h 35m
2026-07-11 DLH4UV - Jul 11, 05:35 UTCJul 11, 06:20 UTC45m
2026-07-10 DLH4T MUC → BER Jul 10, 20:05 UTCJul 10, 20:55 UTC50m
2026-07-10 DLH8UC - Jul 10, 16:40 UTCJul 10, 18:30 UTC1h 50m
2026-07-10 DLH1EJ - Jul 10, 13:50 UTCJul 10, 15:30 UTC1h 40m
2026-07-10 DLH4YV BUD → MUC Jul 10, 11:40 UTCJul 10, 12:40 UTC1h 0m
2026-07-10 DLH7YW MUC → BUD Jul 10, 09:45 UTCJul 10, 10:35 UTC50m
2026-07-10 DLH7HP CPH → MUC Jul 10, 07:00 UTCJul 10, 08:10 UTC1h 10m
2026-07-10 DLH6VT - Jul 10, 04:25 UTCJul 10, 05:40 UTC1h 15m
2026-07-09 DLH36M MAD → MUC Jul 9, 17:10 UTCJul 9, 19:10 UTC2h 0m
2026-07-09 DLH02X - Jul 9, 13:30 UTCJul 9, 15:40 UTC2h 10m
2026-07-09 DLH4E - Jul 9, 10:35 UTCJul 9, 11:30 UTC55m
2026-07-09 DLH1JH - Jul 9, 08:30 UTCJul 9, 09:30 UTC1h 0m
2026-07-09 DLH1715 - Jul 9, 04:40 UTCJul 9, 06:00 UTC1h 20m
2026-07-08 DLH1714 - Jul 8, 19:55 UTCJul 8, 20:55 UTC1h 0m
2026-07-08 DLH8M - Jul 8, 15:50 UTCJul 8, 16:40 UTC50m
2026-07-08 DLH5MJ - Jul 8, 13:40 UTCJul 8, 14:40 UTC1h 0m
2026-07-08 DLH3LX DUB → MUC Jul 8, 10:00 UTCJul 8, 12:00 UTC2h 0m
2026-07-08 DLH5MM MUC → DUB Jul 8, 06:40 UTCJul 8, 08:45 UTC2h 5m
2026-07-08 DLH4LY KRK → MUC Jul 8, 04:05 UTCJul 8, 05:10 UTC1h 5m
2026-07-07 DLH4KX - Jul 7, 20:25 UTCJul 7, 21:20 UTC55m
2026-07-07 DLH6AN HAJ → MUC Jul 7, 18:15 UTCJul 7, 19:05 UTC50m
2026-07-07 DLH4HX - Jul 7, 16:20 UTCJul 7, 17:10 UTC50m
2026-07-07 DLH3FN ARN → MUC Jul 7, 13:35 UTCJul 7, 15:25 UTC1h 50m
2026-07-07 DLH8XM - Jul 7, 10:40 UTCJul 7, 12:30 UTC1h 50m
2026-07-07 DLH1E - Jul 7, 07:00 UTCJul 7, 08:05 UTC1h 5m
2026-07-07 DLH8PL - Jul 7, 05:00 UTCJul 7, 06:00 UTC1h 0m
2026-07-06 DLH5YW - Jul 6, 16:55 UTCJul 6, 18:30 UTC1h 35m
2026-07-06 DLH5KX - Jul 6, 14:30 UTCJul 6, 15:55 UTC1h 25m
2026-07-06 DLH3LX DUB → MUC Jul 6, 10:15 UTCJul 6, 12:10 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-AIRU page for operator, model, and routing details .

Mode-S 3C6655 frequently asked

What is Mode-S code 3C6655?
3C6655 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIRU.
Where is Mode-S 3C6655 registered?
Mode-S code 3C6655 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C6655 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C6655, octal 17063125, decimal 3,958,357.
What flights does 3C6655 operate?
Mode-S 3C6655 has broadcast 20 distinct callsigns, including DLH78H, DLH74U, DLH3PF, DLH9LL, DLH9KK.