Apparatus

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sensors Mode-S transponder

3C66A3

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUC · AIRBUS A-320

Hex
3C66A3
Octal
17063243
Decimal
3,958,435
Country
DE
Tail
D-AIUC
Type
A320
Broadcasting now · callsign DLH1EP · 30,000 ft
Flights observed
562
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 21:45 UTC

Current position

3C66A3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C66A3 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
DLH5HV - 8 2026-07-20
DLH8NP - 7 2026-07-19
DLH02P Lufthansa 7 2026-07-26
DLH99P Lufthansa 6 2026-07-26
DLH6JF - 6 2026-07-20
DLH5AH - 6 2026-07-20
DLH2LJ - 6 2026-07-16
DLH2ER - 6 2026-07-16
DLH1PJ Lufthansa 6 2026-07-21
DLH1ME - 6 2026-07-21
DLH9VT - 5 2026-06-25
DLH9JV - 5 2026-07-12
DLH8CF - 5 2026-06-25
DLH88E - 5 2026-07-13
DLH7JT Lufthansa 5 2026-05-30
DLH4UV - 5 2026-07-10
DLH4T - 5 2026-07-09
DLH4M - 5 2026-07-07
DLH3LR - 5 2026-07-17
DLH3EE - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DLH02P FRA → BIO Jul 26, 20:15 UTCJul 26, 21:45 UTC1h 30m
2026-07-26 DLH3NF FRA → LEJ Jul 26, 16:25 UTCJul 26, 18:15 UTC1h 50m
2026-07-26 DLH1VT WRO → FRA Jul 26, 13:30 UTCJul 26, 15:10 UTC1h 40m
2026-07-26 DLH99P BIO → FRA Jul 26, 09:45 UTCJul 26, 11:35 UTC1h 50m
2026-07-25 DLH02P FRA → BIO Jul 25, 19:35 UTCJul 25, 21:20 UTC1h 45m
2026-07-25 DLH08X - Jul 25, 16:50 UTCJul 25, 17:55 UTC1h 5m
2026-07-25 DLH16A - Jul 25, 14:25 UTCJul 25, 15:30 UTC1h 5m
2026-07-25 DLH61A MUC → OPO Jul 25, 11:00 UTCJul 25, 13:20 UTC2h 20m
2026-07-25 DLH38J BCN → FRA Jul 25, 07:30 UTCJul 25, 10:05 UTC2h 35m
2026-07-25 DLH4LY MUC → SUF Jul 25, 04:10 UTCJul 25, 05:25 UTC1h 15m
2026-07-24 DLH4KX NAP → FRA Jul 24, 20:20 UTCJul 24, 21:20 UTC1h 0m
2026-07-24 DLH36M OVD → MUC Jul 24, 16:45 UTCJul 24, 18:40 UTC1h 55m
2026-07-24 DLH02X MUC → MAD Jul 24, 13:20 UTCJul 24, 15:35 UTC2h 15m
2026-07-24 DLH1913 OLB → MUC Jul 24, 10:30 UTCJul 24, 11:50 UTC1h 20m
2026-07-24 DLH8PF MUC → SOF Jul 24, 07:40 UTCJul 24, 08:45 UTC1h 5m
2026-07-24 DLH09H MUC → NCE Jul 24, 04:25 UTCJul 24, 05:55 UTC1h 30m
2026-07-23 DLH09X MAD → MUC Jul 23, 20:00 UTCJul 23, 21:15 UTC1h 15m
2026-07-23 DLH8RV HAJ → FRA Jul 23, 17:45 UTCJul 23, 18:30 UTC45m
2026-07-23 DLH9HH FRA → WAW Jul 23, 15:35 UTCJul 23, 16:30 UTC55m
2026-07-23 DLH8JA FRA → EDI Jul 23, 13:35 UTCJul 23, 14:30 UTC55m
2026-07-23 DLH3YK - Jul 23, 11:45 UTCJul 23, 12:40 UTC55m
2026-07-23 DLH1VV DBV → MUC Jul 23, 09:20 UTCJul 23, 10:45 UTC1h 25m
2026-07-23 DLH6PF - Jul 23, 07:10 UTCJul 23, 08:20 UTC1h 10m
2026-07-23 DLH93U MAD → MUC Jul 23, 04:15 UTCJul 23, 05:25 UTC1h 10m
2026-07-22 DLH33P MUC → NCE Jul 22, 20:20 UTCJul 22, 21:25 UTC1h 5m
2026-07-22 DLH2UT HAM → FRA Jul 22, 11:50 UTCJul 22, 13:05 UTC1h 15m
2026-07-21 DLH2RX - Jul 21, 18:40 UTCJul 21, 19:50 UTC1h 10m
2026-07-21 DLH04J - Jul 21, 16:40 UTCJul 21, 17:40 UTC1h 0m
2026-07-21 DLH99X - Jul 21, 14:20 UTCJul 21, 15:30 UTC1h 10m
2026-07-21 DLH1ME - Jul 21, 12:25 UTCJul 21, 13:10 UTC45m
2026-07-21 DLH1PJ GDN → FRA Jul 21, 10:10 UTCJul 21, 10:45 UTC35m
2026-07-21 DLH8MX DUS → MUC Jul 21, 07:40 UTCJul 21, 08:30 UTC50m
2026-07-21 DLH7KK MUC → DUS Jul 21, 05:45 UTCJul 21, 06:35 UTC50m
2026-07-20 DLH5AH AMS → MUC Jul 20, 15:15 UTCJul 20, 16:20 UTC1h 5m
2026-07-20 DLH6JF - Jul 20, 12:55 UTCJul 20, 14:05 UTC1h 10m
2026-07-20 DLH29Y FRA → OPO Jul 20, 10:15 UTCJul 20, 11:15 UTC1h 0m
2026-07-20 DLH07T FRA → SZG Jul 20, 07:55 UTCJul 20, 09:20 UTC1h 25m
2026-07-20 DLH5HV DUS → MUC Jul 20, 05:55 UTCJul 20, 06:40 UTC45m
2026-07-19 DLH8NP - Jul 19, 17:50 UTCJul 19, 18:40 UTC50m
2026-07-19 DLH5AH - Jul 19, 15:25 UTCJul 19, 16:25 UTC1h 0m
2026-07-19 DLH6JF - Jul 19, 13:15 UTCJul 19, 14:20 UTC1h 5m
2026-07-19 DLH6PL - Jul 19, 10:10 UTCJul 19, 11:40 UTC1h 30m
2026-07-19 DLH8YH MUC → MAN Jul 19, 06:55 UTCJul 19, 08:45 UTC1h 50m
2026-07-19 DLH1LX SOF → FRA Jul 19, 03:25 UTCJul 19, 05:10 UTC1h 45m
2026-07-18 DLH9852 - Jul 18, 20:00 UTCJul 18, 21:35 UTC1h 35m
2026-07-18 DLH6CJ - Jul 18, 17:10 UTCJul 18, 18:30 UTC1h 20m
2026-07-18 DLH9XC - Jul 18, 14:55 UTCJul 18, 16:00 UTC1h 5m
2026-07-18 DLH29Y - Jul 18, 10:15 UTCJul 18, 11:20 UTC1h 5m
2026-07-18 DLH07T - Jul 18, 08:00 UTCJul 18, 09:10 UTC1h 10m
2026-07-18 DLH5HV DUS → MUC Jul 18, 05:35 UTCJul 18, 06:30 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-AIUC page for operator, model, and routing details .

Mode-S 3C66A3 frequently asked

What is Mode-S code 3C66A3?
3C66A3 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUC.
Where is Mode-S 3C66A3 registered?
Mode-S code 3C66A3 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66A3 broadcasting right now?
Yes. Mode-S 3C66A3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66A3, octal 17063243, decimal 3,958,435.
What flights does 3C66A3 operate?
Mode-S 3C66A3 has broadcast 20 distinct callsigns, including DLH5HV, DLH8NP, DLH02P, DLH99P, DLH6JF.