Apparatus

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sensors Mode-S transponder

3C66B8

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUX · AIRBUS A-320

Hex
3C66B8
Octal
17063270
Decimal
3,958,456
Country
DE
Tail
D-AIUX
Type
A320
No current signal · last broadcast 4h ago
Flights observed
334
Distinct callsigns
20
Country
DE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 3C66B8.

Country allocation

The ICAO 24-bit address 3C66B8 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
OCN23F - 37 2026-07-14
OCN1GN - 36 2026-07-14
OCN6NH O Air 20 2026-07-12
OCN515 - 19 2026-07-12
OCN5Q O Air 18 2026-06-13
OCN75M - 15 2026-06-13
OCN2WK - 10 2026-07-08
OCN9ZF O Air 9 2026-06-08
OCN5MC - 9 2026-07-13
OCN4EK - 9 2026-07-08
OCN2B - 9 2026-07-13
OCN4ES - 8 2026-06-08
OCN2Y O Air 8 2026-05-30
OCN1RK O Air 8 2026-05-30
OCN7YZ - 6 2026-05-20
OCN3ME O Air 6 2026-05-20
OCN8NT - 5 2026-07-11
OCN3EL - 5 2026-07-11
OCN8FE - 4 2026-05-15
OCN671Y - 4 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 OCN1GN IBZ → FRA Jul 14, 11:15 UTCJul 14, 13:15 UTC2h 0m
2026-07-14 OCN23F FRA → IBZ Jul 14, 08:00 UTCJul 14, 09:55 UTC1h 55m
2026-07-13 OCN5MC - Jul 13, 17:00 UTCJul 13, 18:55 UTC1h 55m
2026-07-13 OCN2B FRA → DBV Jul 13, 14:30 UTCJul 13, 16:00 UTC1h 30m
2026-07-13 OCN1GN IBZ → FRA Jul 13, 11:00 UTCJul 13, 12:55 UTC1h 55m
2026-07-13 OCN23F - Jul 13, 07:50 UTCJul 13, 09:45 UTC1h 55m
2026-07-13 OCN23F - Jul 13, 07:35 UTCJul 13, 07:40 UTC5m
2026-07-12 OCN515 - Jul 12, 19:15 UTCJul 12, 20:55 UTC1h 40m
2026-07-12 OCN6NH PMI → MUC Jul 12, 16:10 UTCJul 12, 18:01 UTC1h 50m
2026-07-12 OCN1GN IBZ → FRA Jul 12, 12:45 UTCJul 12, 14:45 UTC2h 0m
2026-07-12 OCN23F FRA → IBZ Jul 12, 09:10 UTCJul 12, 11:05 UTC1h 55m
2026-07-12 OCN5MC DBV → FRA Jul 12, 05:35 UTCJul 12, 07:25 UTC1h 50m
2026-07-12 OCN2B FRA → DBV Jul 12, 03:10 UTCJul 12, 04:35 UTC1h 25m
2026-07-11 OCN3EL - Jul 11, 16:40 UTCJul 11, 20:25 UTC3h 45m
2026-07-11 OCN8NT - Jul 11, 10:45 UTCJul 11, 14:50 UTC4h 5m
2026-07-11 OCN1GN - Jul 11, 06:10 UTCJul 11, 08:15 UTC2h 5m
2026-07-11 OCN23F FRA → IBZ Jul 11, 03:01 UTCJul 11, 05:10 UTC2h 10m
2026-07-10 OCN5MC DBV → FRA Jul 10, 16:45 UTCJul 10, 18:35 UTC1h 50m
2026-07-10 OCN2B - Jul 10, 14:25 UTCJul 10, 15:55 UTC1h 30m
2026-07-10 OCN1GN IBZ → FRA Jul 10, 11:10 UTCJul 10, 13:05 UTC1h 55m
2026-07-10 OCN23F FRA → IBZ Jul 10, 07:45 UTCJul 10, 10:00 UTC2h 15m
2026-07-09 OCN6JG - Jul 9, 11:50 UTCJul 9, 14:20 UTC2h 30m
2026-07-09 OCN3TY - Jul 9, 07:45 UTCJul 9, 10:30 UTC2h 45m
2026-07-08 OCN2WK - Jul 8, 17:50 UTCJul 8, 19:10 UTC1h 20m
2026-07-08 OCN4EK - Jul 8, 15:20 UTCJul 8, 16:15 UTC55m
2026-07-08 OCN1GN IBZ → FRA Jul 8, 11:05 UTCJul 8, 13:20 UTC2h 15m
2026-07-08 OCN23F FRA → IBZ Jul 8, 08:00 UTCJul 8, 09:50 UTC1h 50m
2026-07-07 OCN515 - Jul 7, 17:40 UTCJul 7, 19:35 UTC1h 55m
2026-07-07 OCN6NH PMI → MUC Jul 7, 14:55 UTCJul 7, 16:35 UTC1h 40m
2026-07-07 OCN1GN - Jul 7, 10:55 UTCJul 7, 13:10 UTC2h 15m
2026-07-07 OCN23F FRA → IBZ Jul 7, 08:05 UTCJul 7, 09:55 UTC1h 50m
2026-07-06 OCN515 - Jul 6, 18:40 UTCJul 6, 20:30 UTC1h 50m
2026-07-06 OCN6NH PMI → MUC Jul 6, 15:25 UTCJul 6, 17:15 UTC1h 50m
2026-07-06 OCN1GN IBZ → FRA Jul 6, 11:40 UTCJul 6, 13:50 UTC2h 10m
2026-07-06 OCN23F FRA → IBZ Jul 6, 08:25 UTCJul 6, 10:25 UTC2h 0m
2026-07-05 OCN515 - Jul 5, 19:15 UTCJul 5, 21:10 UTC1h 55m
2026-07-05 OCN6NH PMI → MUC Jul 5, 16:05 UTCJul 5, 17:45 UTC1h 40m
2026-07-05 OCN1GN IBZ → FRA Jul 5, 12:10 UTCJul 5, 14:20 UTC2h 10m
2026-07-05 OCN23F FRA → IBZ Jul 5, 09:05 UTCJul 5, 10:55 UTC1h 50m
2026-07-05 OCN5MC DBV → FRA Jul 5, 05:35 UTCJul 5, 07:25 UTC1h 50m
2026-07-05 OCN2B FRA → DBV Jul 5, 03:05 UTCJul 5, 04:30 UTC1h 25m
2026-07-04 OCN3EL TFS → FRA Jul 4, 16:00 UTCJul 4, 20:05 UTC4h 5m
2026-07-04 OCN8NT FRA → TFS Jul 4, 10:25 UTCJul 4, 14:40 UTC4h 15m
2026-07-04 OCN1GN IBZ → FRA Jul 4, 05:55 UTCJul 4, 08:05 UTC2h 10m
2026-07-04 OCN23F FRA → IBZ Jul 4, 03:10 UTCJul 4, 05:00 UTC1h 50m
2026-07-03 OCN5MC - Jul 3, 16:40 UTCJul 3, 18:20 UTC1h 40m
2026-07-03 OCN2B - Jul 3, 14:20 UTCJul 3, 15:55 UTC1h 35m
2026-07-03 OCN1GN IBZ → FRA Jul 3, 11:00 UTCJul 3, 13:05 UTC2h 5m
2026-07-03 OCN23F - Jul 3, 07:45 UTCJul 3, 09:35 UTC1h 50m
2026-07-02 OCN3EL TFS → FRA Jul 2, 16:35 UTCJul 2, 20:55 UTC4h 20m

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

Mode-S 3C66B8 frequently asked

What is Mode-S code 3C66B8?
3C66B8 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUX.
Where is Mode-S 3C66B8 registered?
Mode-S code 3C66B8 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66B8 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66B8, octal 17063270, decimal 3,958,456.
What flights does 3C66B8 operate?
Mode-S 3C66B8 has broadcast 20 distinct callsigns, including OCN23F, OCN1GN, OCN6NH, OCN515, OCN5Q.