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sensors Mode-S transponder

3C66A4

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUD · AIRBUS A-320

Hex
3C66A4
Octal
17063244
Decimal
3,958,436
Country
DE
Tail
D-AIUD
Type
A320
No current signal · last broadcast Jul 26, 19:40 UTC
Flights observed
611
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 19:40 UTC

Last known position

Most recent position reported by Mode-S 3C66A4.

Country allocation

The ICAO 24-bit address 3C66A4 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
DLH69H Lufthansa 9 2026-07-22
DLH4UV - 8 2026-07-05
DLH4T - 8 2026-07-04
DLH4JA Lufthansa 8 2026-07-25
DLH3NC Lufthansa 8 2026-07-25
DLH33P - 8 2026-07-03
DLH05Y - 8 2026-07-22
DLH9XC - 7 2026-07-21
DLH93U - 7 2026-07-04
DLH7KX Lufthansa 7 2026-07-25
DLH6CJ - 7 2026-07-21
DLH99H - 6 2026-07-07
DLH7HF Lufthansa 6 2026-07-25
DLH06H - 6 2026-07-07
DLH96V - 5 2026-07-19
DLH8VC - 5 2026-07-10
DLH8PN Lufthansa 5 2026-06-10
DLH7FM Lufthansa 5 2026-06-15
DLH6NJ Lufthansa 5 2026-07-19
DLH5UW Lufthansa 5 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DLH2KY ZRH → MUC Jul 26, 19:00 UTCJul 26, 19:40 UTC40m
2026-07-26 DLH7AP MUC → LJU Jul 26, 17:35 UTCJul 26, 18:10 UTC35m
2026-07-26 DLH24T MAD → FRA Jul 26, 14:50 UTCJul 26, 16:30 UTC1h 40m
2026-07-26 DLH87A MUC → BCN Jul 26, 11:35 UTCJul 26, 13:10 UTC1h 35m
2026-07-26 DLH4AK ZRH → MUC Jul 26, 09:10 UTCJul 26, 09:55 UTC45m
2026-07-26 DLH4X MUC → BER Jul 26, 07:20 UTCJul 26, 08:10 UTC50m
2026-07-26 DLH2FL VCE → FRA Jul 26, 03:05 UTCJul 26, 05:25 UTC2h 20m
2026-07-25 DLH5AE STR → MUC Jul 25, 17:40 UTCJul 25, 19:40 UTC2h 0m
2026-07-25 DLH7HF BRE → MUC Jul 25, 14:50 UTCJul 25, 15:45 UTC55m
2026-07-25 DLH7KX FRA → BER Jul 25, 13:10 UTCJul 25, 14:00 UTC50m
2026-07-25 DLH3NC CPH → FRA Jul 25, 10:10 UTCJul 25, 11:55 UTC1h 45m
2026-07-25 DLH4JA MUC → OTP Jul 25, 07:10 UTCJul 25, 08:40 UTC1h 30m
2026-07-24 DLH09F VIE → MUC Jul 24, 19:15 UTCJul 24, 20:20 UTC1h 5m
2026-07-24 DLH06N - Jul 24, 17:05 UTCJul 24, 18:25 UTC1h 20m
2026-07-24 DLH7HF BRE → MUC Jul 24, 14:55 UTCJul 24, 15:50 UTC55m
2026-07-24 DLH7KX FRA → BER Jul 24, 13:00 UTCJul 24, 14:00 UTC1h 0m
2026-07-24 DLH29Y FRA → OPO Jul 24, 10:45 UTCJul 24, 11:45 UTC1h 0m
2026-07-24 DLH07T FRA → SZG Jul 24, 08:05 UTCJul 24, 09:35 UTC1h 30m
2026-07-24 DLH1KV MUC → MAN Jul 24, 03:25 UTCJul 24, 05:00 UTC1h 35m
2026-07-23 DLH1CK WAW → FRA Jul 23, 18:35 UTCJul 23, 20:05 UTC1h 30m
2026-07-23 DLH1PX HAJ → MUC Jul 23, 16:00 UTCJul 23, 16:50 UTC50m
2026-07-23 DLH2JV - Jul 23, 14:05 UTCJul 23, 14:55 UTC50m
2026-07-23 DLH57P MAD → MUC Jul 23, 10:10 UTCJul 23, 12:15 UTC2h 5m
2026-07-23 DLH95N MUC → MAD Jul 23, 06:40 UTCJul 23, 08:55 UTC2h 15m
2026-07-23 DLH4CH MUC → AMS Jul 23, 04:20 UTCJul 23, 05:20 UTC1h 0m
2026-07-22 DLH9WA FRA → BRU Jul 22, 20:05 UTCJul 22, 21:00 UTC55m
2026-07-22 DLH69H FRA → MRS Jul 22, 16:30 UTCJul 22, 18:35 UTC2h 5m
2026-07-22 DLH05Y MUC → ALC Jul 22, 13:05 UTCJul 22, 15:25 UTC2h 20m
2026-07-22 DLH9VT - Jul 22, 10:20 UTCJul 22, 11:50 UTC1h 30m
2026-07-22 DLH01J - Jul 22, 04:25 UTCJul 22, 05:25 UTC1h 0m
2026-07-21 DLH92A MUC → MAD Jul 21, 18:10 UTCJul 21, 19:30 UTC1h 20m
2026-07-21 DLH6CJ - Jul 21, 15:15 UTCJul 21, 16:40 UTC1h 25m
2026-07-21 DLH9XC - Jul 21, 13:05 UTCJul 21, 14:05 UTC1h 0m
2026-07-21 DLH9VT - Jul 21, 10:10 UTCJul 21, 11:55 UTC1h 45m
2026-07-21 DLH8CF - Jul 21, 07:25 UTCJul 21, 09:00 UTC1h 35m
2026-07-21 DLH6KX STR → MUC Jul 21, 04:20 UTCJul 21, 04:45 UTC25m
2026-07-20 DLH4HW MUC → STR Jul 20, 20:40 UTCJul 20, 21:15 UTC35m
2026-07-20 DLH6VU BSL → MUC Jul 20, 18:40 UTCJul 20, 19:20 UTC40m
2026-07-20 DLH4AM - Jul 20, 17:00 UTCJul 20, 17:45 UTC45m
2026-07-20 DLH7HF BRE → MUC Jul 20, 15:05 UTCJul 20, 16:00 UTC55m
2026-07-20 DLH7KX FRA → BER Jul 20, 13:15 UTCJul 20, 14:10 UTC55m
2026-07-20 DLH99P BIO → FRA Jul 20, 06:55 UTCJul 20, 08:35 UTC1h 40m
2026-07-19 DLH02P - Jul 19, 19:30 UTCJul 19, 21:30 UTC2h 0m
2026-07-19 DLH88E - Jul 19, 17:05 UTCJul 19, 18:10 UTC1h 5m
2026-07-19 DLH07A MUC → MRS Jul 19, 14:45 UTCJul 19, 16:00 UTC1h 15m
2026-07-19 DLH1PP KRK → MUC Jul 19, 11:55 UTCJul 19, 13:00 UTC1h 5m
2026-07-19 DLH6NJ FRA → SJJ Jul 19, 09:45 UTCJul 19, 10:50 UTC1h 5m
2026-07-19 DLH96V BCN → MUC Jul 19, 06:05 UTCJul 19, 07:45 UTC1h 40m
2026-07-18 DLH24Y MUC → BCN Jul 18, 18:45 UTCJul 18, 20:25 UTC1h 40m
2026-07-18 DLH3YE CGN → MUC Jul 18, 16:40 UTCJul 18, 17:35 UTC55m

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

Mode-S 3C66A4 frequently asked

What is Mode-S code 3C66A4?
3C66A4 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUD.
Where is Mode-S 3C66A4 registered?
Mode-S code 3C66A4 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66A4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66A4, octal 17063244, decimal 3,958,436.
What flights does 3C66A4 operate?
Mode-S 3C66A4 has broadcast 20 distinct callsigns, including DLH69H, DLH4UV, DLH4T, DLH4JA, DLH3NC.