Apparatus

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sensors Mode-S transponder

3C6643

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIRC · AIRBUS A-321

Hex
3C6643
Octal
17063103
Decimal
3,958,339
Country
DE
Tail
D-AIRC
Type
A321
No current signal · last broadcast 8h ago
Flights observed
466
Distinct callsigns
20
Country
DE
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 3C6643.

Country allocation

The ICAO 24-bit address 3C6643 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
DLH9YP - 9 2026-06-24
DLH6M - 9 2026-07-12
DLH7YW - 7 2026-06-23
DLH6AN - 7 2026-06-19
DLH4YV - 7 2026-06-23
DLH4HX - 7 2026-06-19
DLH3EY - 7 2026-07-03
DLH8XM - 6 2026-06-19
DLH8N - 6 2026-07-07
DLH5MA - 6 2026-07-05
DLH5LL - 6 2026-07-08
DLH5KH - 6 2026-07-05
DLH4NF - 6 2026-07-07
DLH3FN Lufthansa 6 2026-06-19
DLH3E - 6 2026-07-08
DLH9FM - 5 2026-07-01
DLH96V - 5 2026-07-10
DLH8MC - 5 2026-06-26
DLH3PK - 5 2026-07-11
DLH3M - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DLH8AJ PMO → MUC Jul 14, 16:25 UTCJul 14, 18:05 UTC1h 40m
2026-07-14 DLH3YJ - Jul 14, 13:50 UTCJul 14, 15:20 UTC1h 30m
2026-07-14 DLH2MF - Jul 14, 10:10 UTCJul 14, 11:50 UTC1h 40m
2026-07-14 DLH7PW - Jul 14, 07:40 UTCJul 14, 09:00 UTC1h 20m
2026-07-14 DLH4UV BER → MUC Jul 14, 05:35 UTCJul 14, 06:25 UTC50m
2026-07-13 DLH4T MUC → BER Jul 13, 19:45 UTCJul 13, 20:25 UTC40m
2026-07-13 DLH1CN - Jul 13, 15:40 UTCJul 13, 16:40 UTC1h 0m
2026-07-13 DLH3NE - Jul 13, 13:25 UTCJul 13, 14:15 UTC50m
2026-07-13 DLH1713 - Jul 13, 10:40 UTCJul 13, 12:00 UTC1h 20m
2026-07-13 DLH1712 - Jul 13, 07:40 UTCJul 13, 08:40 UTC1h 0m
2026-07-13 DLH93U NCE → MUC Jul 13, 04:40 UTCJul 13, 05:40 UTC1h 0m
2026-07-12 DLH33P MUC → NCE Jul 12, 20:20 UTCJul 12, 21:25 UTC1h 5m
2026-07-12 DLH1XN BER → MUC Jul 12, 18:01 UTCJul 12, 18:50 UTC50m
2026-07-12 DLH3X MUC → BER Jul 12, 16:10 UTCJul 12, 16:55 UTC45m
2026-07-12 DLH8HU BER → MUC Jul 12, 14:05 UTCJul 12, 14:55 UTC50m
2026-07-12 DLH5N MUC → BER Jul 12, 12:05 UTCJul 12, 12:55 UTC50m
2026-07-12 DLH9E HAM → MUC Jul 12, 08:55 UTCJul 12, 09:55 UTC1h 0m
2026-07-12 DLH1MK - Jul 12, 07:01 UTCJul 12, 07:55 UTC55m
2026-07-12 DLH6M - Jul 12, 04:20 UTCJul 12, 05:20 UTC1h 0m
2026-07-11 DLH1HY - Jul 11, 17:25 UTCJul 11, 18:25 UTC1h 0m
2026-07-11 DLH5PF - Jul 11, 13:25 UTCJul 11, 15:05 UTC1h 40m
2026-07-11 DLH2YY - Jul 11, 10:25 UTCJul 11, 12:05 UTC1h 40m
2026-07-11 DLH3M HAM → MUC Jul 11, 08:10 UTCJul 11, 09:05 UTC55m
2026-07-11 DLH3PK - Jul 11, 05:55 UTCJul 11, 06:55 UTC1h 0m
2026-07-10 DLH7XA - Jul 10, 17:05 UTCJul 10, 18:30 UTC1h 25m
2026-07-10 DLH4NC - Jul 10, 14:35 UTCJul 10, 16:00 UTC1h 25m
2026-07-10 DLH06H NCE → MUC Jul 10, 11:55 UTCJul 10, 13:00 UTC1h 5m
2026-07-10 DLH99H MUC → NCE Jul 10, 09:40 UTCJul 10, 10:45 UTC1h 5m
2026-07-10 DLH96V BCN → MUC Jul 10, 06:10 UTCJul 10, 07:45 UTC1h 35m
2026-07-09 DLH24Y - Jul 9, 18:55 UTCJul 9, 20:30 UTC1h 35m
2026-07-09 DLH8WF - Jul 9, 16:50 UTCJul 9, 17:35 UTC45m
2026-07-09 DLH7T MUC → BER Jul 9, 14:50 UTCJul 9, 15:50 UTC1h 0m
2026-07-09 DLH5CF - Jul 9, 10:00 UTCJul 9, 11:40 UTC1h 40m
2026-07-09 DLH6EV - Jul 9, 07:15 UTCJul 9, 08:45 UTC1h 30m
2026-07-09 DLH2FL ATH → MUC Jul 9, 03:15 UTCJul 9, 05:35 UTC2h 20m
2026-07-08 DLH5AE MUC → ATH Jul 8, 17:45 UTCJul 8, 19:55 UTC2h 10m
2026-07-08 DLH3E HAM → MUC Jul 8, 13:40 UTCJul 8, 14:35 UTC55m
2026-07-08 DLH5LL MUC → HAM Jul 8, 11:25 UTCJul 8, 12:30 UTC1h 5m
2026-07-08 DLH4RV - Jul 8, 08:20 UTCJul 8, 09:10 UTC50m
2026-07-08 DLH2TY - Jul 8, 06:25 UTCJul 8, 07:20 UTC55m
2026-07-07 DLH2RJ ATH → MUC Jul 7, 16:35 UTCJul 7, 18:50 UTC2h 15m
2026-07-07 DLH3CK MUC → ATH Jul 7, 13:40 UTCJul 7, 15:35 UTC1h 55m
2026-07-07 DLH4NF BER → MUC Jul 7, 11:35 UTCJul 7, 12:25 UTC50m
2026-07-07 DLH8N - Jul 7, 09:40 UTCJul 7, 10:30 UTC50m
2026-07-07 DLH33K - Jul 7, 05:45 UTCJul 7, 08:20 UTC2h 35m
2026-07-06 DLH41U MUC → OPO Jul 6, 19:45 UTCJul 6, 22:10 UTC2h 25m
2026-07-06 DLH1775 SKG → MUC Jul 6, 15:40 UTCJul 6, 17:35 UTC1h 55m
2026-07-06 DLH1774 - Jul 6, 13:00 UTCJul 6, 14:35 UTC1h 35m
2026-07-06 DLH6PL MAN → MUC Jul 6, 10:05 UTCJul 6, 11:45 UTC1h 40m
2026-07-06 DLH8YH - Jul 6, 07:05 UTCJul 6, 08:55 UTC1h 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-AIRC page for operator, model, and routing details .

Mode-S 3C6643 frequently asked

What is Mode-S code 3C6643?
3C6643 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIRC.
Where is Mode-S 3C6643 registered?
Mode-S code 3C6643 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C6643 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C6643, octal 17063103, decimal 3,958,339.
What flights does 3C6643 operate?
Mode-S 3C6643 has broadcast 20 distinct callsigns, including DLH9YP, DLH6M, DLH7YW, DLH6AN, DLH4YV.