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sensors Mode-S transponder

3C666A

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AISJ · AIRBUS A-321

Hex
3C666A
Octal
17063152
Decimal
3,958,378
Country
DE
Tail
D-AISJ
Type
A321
No current signal · last broadcast Jul 26, 19:55 UTC
Flights observed
504
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 19:55 UTC

Last known position

Most recent position reported by Mode-S 3C666A.

Country allocation

The ICAO 24-bit address 3C666A 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
DLH8PJ - 8 2026-07-14
DLH5MM Lufthansa 8 2026-07-25
DLH3LX Lufthansa 8 2026-07-25
DLH8PL - 7 2026-07-06
DLH7M - 7 2026-07-12
DLH4MT - 7 2026-07-13
DLH4JW - 7 2026-07-12
DLH1E - 7 2026-07-06
DLH7XA - 6 2026-07-07
DLH4NC - 6 2026-07-07
DLH3NE - 6 2026-07-15
DLH1CN - 6 2026-07-15
DLH4M - 5 2026-07-02
DLH3WH - 5 2026-07-21
DLH3AK Lufthansa 5 2026-07-21
DLH2UT - 5 2026-06-18
DLH2NH - 5 2026-07-02
DLH1KK - 5 2026-06-18
DLH09X - 5 2026-06-26
DLH9E - 4 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DLH1835 FRA → CDG Jul 26, 17:15 UTCJul 26, 19:55 UTC2h 40m
2026-07-26 DLH1834 MUC → AGP Jul 26, 13:40 UTCJul 26, 15:55 UTC2h 15m
2026-07-26 DLH1713 TIA → MUC Jul 26, 10:55 UTCJul 26, 12:00 UTC1h 5m
2026-07-26 DLH1712 MUC → TIA Jul 26, 07:40 UTCJul 26, 08:50 UTC1h 10m
2026-07-26 DLH7XV BSL → MUC Jul 26, 04:15 UTCJul 26, 06:05 UTC1h 50m
2026-07-25 DLH5EE CPH → FRA Jul 25, 19:55 UTCJul 25, 21:40 UTC1h 45m
2026-07-25 DLH06K MUC → ORY Jul 25, 16:45 UTCJul 25, 18:45 UTC2h 0m
2026-07-25 DLH87U BCN → MUC Jul 25, 13:20 UTCJul 25, 15:40 UTC2h 20m
2026-07-25 DLH3LX MUC → EDI Jul 25, 09:55 UTCJul 25, 11:50 UTC1h 55m
2026-07-25 DLH5MM FCO → FRA Jul 25, 06:40 UTCJul 25, 08:45 UTC2h 5m
2026-07-25 DLH7LA STR → MUC Jul 25, 04:45 UTCJul 25, 05:35 UTC50m
2026-07-24 DLH3LR FRA → HEL Jul 24, 19:25 UTCJul 24, 20:20 UTC55m
2026-07-24 DLH4YV FRA → LHR Jul 24, 11:45 UTCJul 24, 12:50 UTC1h 5m
2026-07-24 DLH7YW MUC → BUD Jul 24, 09:50 UTCJul 24, 10:45 UTC55m
2026-07-24 DLH5HV FRA → HAM Jul 24, 05:50 UTCJul 24, 06:40 UTC50m
2026-07-23 DLH8NP - Jul 23, 18:05 UTCJul 23, 18:55 UTC50m
2026-07-23 DLH3UV FMO → MUC Jul 23, 16:05 UTCJul 23, 17:00 UTC55m
2026-07-23 DLH5NF - Jul 23, 14:00 UTCJul 23, 14:50 UTC50m
2026-07-23 DLH8MC FCO → MUC Jul 23, 04:40 UTCJul 23, 05:30 UTC50m
2026-07-22 DLH4T MUC → BER Jul 22, 19:50 UTCJul 22, 20:40 UTC50m
2026-07-22 DLH9M HAM → MUC Jul 22, 17:55 UTCJul 22, 18:50 UTC55m
2026-07-22 DLH9KL - Jul 22, 15:35 UTCJul 22, 16:35 UTC1h 0m
2026-07-22 DLH1PP OTP → FRA Jul 22, 11:50 UTCJul 22, 12:50 UTC1h 0m
2026-07-22 DLH1PP OTP → FRA Jul 22, 11:10 UTCJul 22, 11:45 UTC35m
2026-07-21 DLH64P MUC → LIS Jul 21, 18:55 UTCJul 21, 21:45 UTC2h 50m
2026-07-21 DLH3AK FRA → NUE Jul 21, 15:55 UTCJul 21, 17:20 UTC1h 25m
2026-07-21 DLH3WH MUC → OLB Jul 21, 13:15 UTCJul 21, 14:45 UTC1h 30m
2026-07-21 DLH3LX DUB → MUC Jul 21, 10:15 UTCJul 21, 12:10 UTC1h 55m
2026-07-21 DLH5MM MUC → DUB Jul 21, 06:45 UTCJul 21, 08:45 UTC2h 0m
2026-07-21 DLH1MA BUD → MUC Jul 21, 04:10 UTCJul 21, 05:20 UTC1h 10m
2026-07-20 DLH9MC FRA → FCO Jul 20, 20:40 UTCJul 20, 21:35 UTC55m
2026-07-20 DLH2RJ ATH → FRA Jul 20, 17:05 UTCJul 20, 19:15 UTC2h 10m
2026-07-20 DLH3CK - Jul 20, 14:15 UTCJul 20, 16:05 UTC1h 50m
2026-07-20 DLH57P MAD → MUC Jul 20, 10:25 UTCJul 20, 12:20 UTC1h 55m
2026-07-20 DLH95N MUC → MAD Jul 20, 06:40 UTCJul 20, 08:55 UTC2h 15m
2026-07-20 DLH3EM - Jul 20, 04:25 UTCJul 20, 05:30 UTC1h 5m
2026-07-19 DLH7KJ HAM → FRA Jul 19, 20:30 UTCJul 19, 21:30 UTC1h 0m
2026-07-19 DLH8UC ARN → FRA Jul 19, 16:55 UTCJul 19, 18:45 UTC1h 50m
2026-07-19 DLH1EJ - Jul 19, 14:00 UTCJul 19, 15:40 UTC1h 40m
2026-07-19 DLH1713 TIA → MUC Jul 19, 10:45 UTCJul 19, 12:05 UTC1h 20m
2026-07-19 DLH1712 MUC → TIA Jul 19, 07:45 UTCJul 19, 08:55 UTC1h 10m
2026-07-19 DLH7XV ARN → MUC Jul 19, 04:20 UTCJul 19, 06:20 UTC2h 0m
2026-07-18 DLH5EE CPH → FRA Jul 18, 20:45 UTCJul 18, 22:30 UTC1h 45m
2026-07-17 DLH8UC - Jul 17, 18:19 UTCJul 17, 20:00 UTC1h 40m
2026-07-17 DLH1EJ - Jul 17, 14:39 UTCJul 17, 16:19 UTC1h 40m
2026-07-17 DLH9901 BLQ → FRA Jul 17, 11:00 UTCJul 17, 13:15 UTC2h 15m
2026-07-15 DLH5AE MUC → ATH Jul 15, 18:25 UTCJul 15, 20:35 UTC2h 10m
2026-07-15 DLH1CN - Jul 15, 15:50 UTCJul 15, 16:40 UTC50m
2026-07-15 DLH3NE - Jul 15, 13:40 UTCJul 15, 14:20 UTC40m
2026-07-15 DLH1KX - Jul 15, 10:20 UTCJul 15, 11:50 UTC1h 30m

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

Mode-S 3C666A frequently asked

What is Mode-S code 3C666A?
3C666A is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AISJ.
Where is Mode-S 3C666A registered?
Mode-S code 3C666A is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C666A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C666A, octal 17063152, decimal 3,958,378.
What flights does 3C666A operate?
Mode-S 3C666A has broadcast 20 distinct callsigns, including DLH8PJ, DLH5MM, DLH3LX, DLH8PL, DLH7M.