Apparatus

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sensors Mode-S transponder

3C6666

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AISF · AIRBUS A-321

Hex
3C6666
Octal
17063146
Decimal
3,958,374
Country
DE
Tail
D-AISF
Type
A321
No current signal · last broadcast 3h ago
Flights observed
421
Distinct callsigns
20
Country
DE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 3C6666.

Country allocation

The ICAO 24-bit address 3C6666 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
DLH4LM - 6 2026-07-02
DLH3MA - 6 2026-07-02
DLH85K - 5 2026-07-16
DLH77P - 5 2026-07-06
DLH74U - 5 2026-07-16
DLH53F - 5 2026-07-16
DLH1PF Lufthansa 5 2026-06-06
DLH9LL - 4 2026-07-14
DLH9EJ - 4 2026-07-11
DLH7EK - 4 2026-07-01
DLH78H - 4 2026-07-17
DLH68X - 4 2026-07-12
DLH5MV - 4 2026-07-11
DLH44K Lufthansa 4 2026-06-12
DLH3PF - 4 2026-07-14
DLH338 Lufthansa 4 2026-06-05
DLH21P - 4 2026-07-12
DLH14C Lufthansa 4 2026-06-12
DLH11F - 4 2026-07-05
DLH9XK - 3 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 DLH2LC - Jul 17, 19:00 UTCJul 17, 20:35 UTC1h 35m
2026-07-17 DLH336 - Jul 17, 16:10 UTCJul 17, 17:35 UTC1h 25m
2026-07-17 DLH11Y BCN → FRA Jul 17, 11:39 UTCJul 17, 13:10 UTC1h 30m
2026-07-17 DLH26C FRA → BCN Jul 17, 08:20 UTCJul 17, 10:10 UTC1h 50m
2026-07-17 DLH78H - Jul 17, 04:25 UTCJul 17, 06:20 UTC1h 55m
2026-07-16 DLH74U FRA → MAD Jul 16, 16:15 UTCJul 16, 18:34 UTC2h 20m
2026-07-16 DLH85K - Jul 16, 13:05 UTCJul 16, 14:40 UTC1h 35m
2026-07-16 DLH53F - Jul 16, 09:40 UTCJul 16, 11:25 UTC1h 45m
2026-07-16 DLH78H - Jul 16, 04:30 UTCJul 16, 06:20 UTC1h 50m
2026-07-15 DLH74U FRA → MAD Jul 15, 15:45 UTCJul 15, 18:00 UTC2h 15m
2026-07-15 DLH979 DUB → FRA Jul 15, 12:35 UTCJul 15, 14:15 UTC1h 40m
2026-07-15 DLH978 FRA → DUB Jul 15, 09:50 UTCJul 15, 11:25 UTC1h 35m
2026-07-15 DLH85N - Jul 15, 05:05 UTCJul 15, 06:30 UTC1h 25m
2026-07-14 DLH48F - Jul 14, 19:05 UTCJul 14, 20:50 UTC1h 45m
2026-07-14 DLH3EK - Jul 14, 15:20 UTCJul 14, 16:55 UTC1h 35m
2026-07-14 DLH3NX FRA → OSL Jul 14, 11:50 UTCJul 14, 13:30 UTC1h 40m
2026-07-14 DLH3PF - Jul 14, 08:40 UTCJul 14, 10:10 UTC1h 30m
2026-07-14 DLH9LL - Jul 14, 05:35 UTCJul 14, 06:55 UTC1h 20m
2026-07-13 DLH3HT - Jul 13, 17:05 UTCJul 13, 18:20 UTC1h 15m
2026-07-13 DLH830 FRA → CPH Jul 13, 14:55 UTCJul 13, 15:55 UTC1h 0m
2026-07-13 DLH5P - Jul 13, 12:35 UTCJul 13, 13:30 UTC55m
2026-07-13 DLH2RW FRA → PRG Jul 13, 10:55 UTCJul 13, 11:35 UTC40m
2026-07-13 DLH36N - Jul 13, 08:40 UTCJul 13, 09:35 UTC55m
2026-07-13 DLH37T FRA → SZG Jul 13, 07:05 UTCJul 13, 07:40 UTC35m
2026-07-13 DLH1331 - Jul 13, 02:50 UTCJul 13, 05:35 UTC2h 45m
2026-07-12 DLH1330 - Jul 12, 20:10 UTCJul 12, 23:20 UTC3h 10m
2026-07-12 DLH5RM DUB → FRA Jul 12, 16:40 UTCJul 12, 18:20 UTC1h 40m
2026-07-12 DLH980 FRA → DUB Jul 12, 14:01 UTCJul 12, 15:35 UTC1h 35m
2026-07-12 DLH21P - Jul 12, 10:15 UTCJul 12, 12:01 UTC1h 45m
2026-07-12 DLH68X - Jul 12, 07:15 UTCJul 12, 09:00 UTC1h 45m
2026-07-12 DLH6EJ BLL → FRA Jul 12, 04:15 UTCJul 12, 05:20 UTC1h 5m
2026-07-11 DLH4KW FRA → BLL Jul 11, 20:50 UTCJul 11, 21:55 UTC1h 5m
2026-07-11 DLH195 BER → FRA Jul 11, 17:15 UTCJul 11, 18:05 UTC50m
2026-07-11 DLH194 FRA → BER Jul 11, 15:10 UTCJul 11, 15:50 UTC40m
2026-07-11 DLH9EJ - Jul 11, 11:50 UTCJul 11, 14:00 UTC2h 10m
2026-07-11 DLH5MV FRA → OTP Jul 11, 08:35 UTCJul 11, 10:25 UTC1h 50m
2026-07-11 DLH1457 - Jul 11, 04:40 UTCJul 11, 06:30 UTC1h 50m
2026-07-10 DLH1456 - Jul 10, 19:55 UTCJul 10, 21:20 UTC1h 25m
2026-07-10 DLH1299 - Jul 10, 11:30 UTCJul 10, 14:20 UTC2h 50m
2026-07-10 DLH1298 - Jul 10, 07:45 UTCJul 10, 10:05 UTC2h 20m
2026-07-09 DLH9C ZRH → FRA Jul 9, 10:35 UTCJul 9, 11:20 UTC45m
2026-07-09 DLH1KJ FRA → ZRH Jul 9, 08:55 UTCJul 9, 09:30 UTC35m
2026-07-09 DLH8J - Jul 9, 05:35 UTCJul 9, 06:25 UTC50m
2026-07-08 DLH73U FRA → CDG Jul 8, 19:35 UTCJul 8, 20:30 UTC55m
2026-07-08 DLH2PV HAM → FRA Jul 8, 17:25 UTCJul 8, 18:10 UTC45m
2026-07-08 DLH4XK FRA → HAM Jul 8, 15:30 UTCJul 8, 16:20 UTC50m
2026-07-08 DLH4KV HEL → FRA Jul 8, 11:15 UTCJul 8, 13:15 UTC2h 0m
2026-07-08 DLH4NH FRA → HEL Jul 8, 08:05 UTCJul 8, 10:15 UTC2h 10m
2026-07-08 DLH5LX KRK → FRA Jul 8, 04:55 UTCJul 8, 06:15 UTC1h 20m
2026-07-07 DLH9ML FRA → KRK Jul 7, 20:25 UTCJul 7, 21:35 UTC1h 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-AISF page for operator, model, and routing details .

Mode-S 3C6666 frequently asked

What is Mode-S code 3C6666?
3C6666 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AISF.
Where is Mode-S 3C6666 registered?
Mode-S code 3C6666 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C6666 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 3C6666, octal 17063146, decimal 3,958,374.
What flights does 3C6666 operate?
Mode-S 3C6666 has broadcast 20 distinct callsigns, including DLH4LM, DLH3MA, DLH85K, DLH77P, DLH74U.