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sensors Mode-S transponder

3C66A1

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUA · AIRBUS A-320

Hex
3C66A1
Octal
17063241
Decimal
3,958,433
Country
DE
Tail
D-AIUA
Type
A320
No current signal · last broadcast Jul 24, 20:50 UTC
Flights observed
580
Distinct callsigns
20
Country
DE
Last broadcast
Jul 24, 20:50 UTC

Last known position

Most recent position reported by Mode-S 3C66A1.

Country allocation

The ICAO 24-bit address 3C66A1 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
DLH81P - 6 2026-07-08
DLH09P - 6 2026-07-08
DLH9KY Lufthansa 5 2026-06-15
DLH9HC - 5 2026-07-06
DLH5JV - 5 2026-07-07
DLH4WU Lufthansa 5 2026-06-16
DLH175 - 5 2026-07-19
DLH174 - 5 2026-07-19
DLH9AV - 4 2026-07-02
DLH8JT - 4 2026-07-08
DLH7XP - 4 2026-07-02
DLH4RJ - 4 2026-07-08
DLH9YW - 3 2026-06-16
DLH9XY - 3 2026-07-02
DLH9K - 3 2026-07-11
DLH947 Lufthansa 3 2026-06-16
DLH8RX Lufthansa 3 2026-06-12
DLH8NC Lufthansa 3 2026-05-05
DLH85K - 3 2026-07-11
DLH7PX Lufthansa 3 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 DLH206 FRA → DRS Jul 24, 19:55 UTCJul 24, 20:45 UTC50m
2026-07-24 DLH21X FRA → NCE Jul 24, 17:15 UTCJul 24, 18:25 UTC1h 10m
2026-07-24 DLH71X FRA → NCE Jul 24, 14:45 UTCJul 24, 16:00 UTC1h 15m
2026-07-24 DLH8FL BGO → FRA Jul 24, 11:50 UTCJul 24, 13:25 UTC1h 35m
2026-07-24 DLH7WJ MUC → TOS Jul 24, 09:05 UTCJul 24, 10:50 UTC1h 45m
2026-07-24 DLH3RJ ATH → FRA Jul 24, 04:15 UTCJul 24, 06:55 UTC2h 40m
2026-07-23 DLH6TV FRA → ATH Jul 23, 15:30 UTCJul 23, 17:50 UTC2h 20m
2026-07-23 DLH52J NCE → FRA Jul 23, 12:55 UTCJul 23, 14:10 UTC1h 15m
2026-07-23 DLH44T - Jul 23, 11:05 UTCJul 23, 11:55 UTC50m
2026-07-23 DLH44T - Jul 23, 10:45 UTCJul 23, 11:00 UTC15m
2026-07-23 DLH3A AMS → FRA Jul 23, 08:20 UTCJul 23, 09:05 UTC45m
2026-07-23 DLH6TR FRA → AMS Jul 23, 06:10 UTCJul 23, 07:00 UTC50m
2026-07-23 DLH1327 TUN → FRA Jul 23, 01:00 UTCJul 23, 03:05 UTC2h 5m
2026-07-22 DLH1326 - Jul 22, 20:20 UTCJul 22, 21:55 UTC1h 35m
2026-07-22 DLH42Y LIS → FRA Jul 22, 16:30 UTCJul 22, 18:50 UTC2h 20m
2026-07-22 DLH03H MUC → BCN Jul 22, 12:20 UTCJul 22, 15:10 UTC2h 50m
2026-07-21 DLH12K BCN → FRA Jul 21, 15:55 UTCJul 21, 17:35 UTC1h 40m
2026-07-21 DLH62F FRA → BCN Jul 21, 12:25 UTCJul 21, 14:05 UTC1h 40m
2026-07-21 DLH6PJ - Jul 21, 10:10 UTCJul 21, 11:00 UTC50m
2026-07-21 DLH1VR FRA → HAM Jul 21, 08:20 UTCJul 21, 09:00 UTC40m
2026-07-21 DLH07Y - Jul 21, 04:05 UTCJul 21, 04:55 UTC50m
2026-07-20 DLH51A BIO → FRA Jul 20, 19:10 UTCJul 20, 19:50 UTC40m
2026-07-20 DLH7MN - Jul 20, 16:40 UTCJul 20, 17:45 UTC1h 5m
2026-07-20 DLH9CH - Jul 20, 14:40 UTCJul 20, 15:35 UTC55m
2026-07-20 DLH9CP FRA → BHX Jul 20, 11:40 UTCJul 20, 13:10 UTC1h 30m
2026-07-20 DLH8PK - Jul 20, 09:10 UTCJul 20, 10:25 UTC1h 15m
2026-07-20 DLH5A - Jul 20, 06:10 UTCJul 20, 06:55 UTC45m
2026-07-19 DLH2HK FRA → AMS Jul 19, 19:10 UTCJul 19, 20:05 UTC55m
2026-07-19 DLH195 BER → FRA Jul 19, 17:15 UTCJul 19, 17:55 UTC40m
2026-07-19 DLH194 FRA → BER Jul 19, 15:10 UTCJul 19, 16:05 UTC55m
2026-07-19 DLH4YC - Jul 19, 12:35 UTCJul 19, 13:45 UTC1h 10m
2026-07-19 DLH6UT - Jul 19, 10:10 UTCJul 19, 11:25 UTC1h 15m
2026-07-19 DLH175 - Jul 19, 07:50 UTCJul 19, 08:40 UTC50m
2026-07-19 DLH174 FRA → BER Jul 19, 06:05 UTCJul 19, 06:50 UTC45m
2026-07-18 DLH3P - Jul 18, 17:05 UTCJul 18, 18:10 UTC1h 5m
2026-07-18 DLH2VV FRA → PRG Jul 18, 15:00 UTCJul 18, 15:40 UTC40m
2026-07-18 DLH3F - Jul 18, 13:00 UTCJul 18, 13:50 UTC50m
2026-07-18 DLH36E FRA → CDG Jul 18, 10:55 UTCJul 18, 11:45 UTC50m
2026-07-18 DLH5AL - Jul 18, 08:45 UTCJul 18, 09:25 UTC40m
2026-07-18 DLH062 FRA → DRS Jul 18, 07:15 UTCJul 18, 07:50 UTC35m
2026-07-17 DLH66M - Jul 17, 17:50 UTCJul 17, 18:34 UTC45m
2026-07-17 DLH05K FRA → SZG Jul 17, 16:15 UTCJul 17, 16:59 UTC45m
2026-07-17 DLH47F BCN → FRA Jul 17, 13:15 UTCJul 17, 14:55 UTC1h 40m
2026-07-17 DLH29M FRA → BCN Jul 17, 09:15 UTCJul 17, 11:04 UTC1h 50m
2026-07-17 DLH1EE - Jul 17, 06:29 UTCJul 17, 07:05 UTC35m
2026-07-16 DLH7EC FRA → MUC Jul 16, 18:40 UTCJul 16, 19:20 UTC40m
2026-07-16 DLH273 LIN → FRA Jul 16, 11:10 UTCJul 16, 12:00 UTC50m
2026-07-16 DLH5NP FRA → LIN Jul 16, 09:20 UTCJul 16, 10:10 UTC50m
2026-07-16 DLH5TT - Jul 16, 06:50 UTCJul 16, 08:05 UTC1h 15m
2026-07-15 DLH958 FRA → BHX Jul 15, 19:25 UTCJul 15, 20:35 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-AIUA page for operator, model, and routing details .

Mode-S 3C66A1 frequently asked

What is Mode-S code 3C66A1?
3C66A1 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUA.
Where is Mode-S 3C66A1 registered?
Mode-S code 3C66A1 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66A1 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66A1, octal 17063241, decimal 3,958,433.
What flights does 3C66A1 operate?
Mode-S 3C66A1 has broadcast 20 distinct callsigns, including DLH81P, DLH09P, DLH9KY, DLH9HC, DLH5JV.