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 Jul 26, 20:55 UTC
Flights observed
381
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 20:55 UTC

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 O Air 46 2026-07-26
OCN1GN O Air 45 2026-07-26
OCN6NH O Air 23 2026-07-26
OCN515 O Air 22 2026-07-26
OCN5Q O Air 21 2026-07-25
OCN75M - 18 2026-07-25
OCN5MC - 14 2026-07-26
OCN2B O Air 13 2026-07-26
OCN2WK - 12 2026-07-20
OCN4EK - 11 2026-07-20
OCN9ZF O Air 10 2026-07-23
OCN4ES - 9 2026-07-23
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
2026-07-26 OCN515 PMI → FRA Jul 26, 18:50 UTCJul 26, 20:50 UTC2h 0m
2026-07-26 OCN6NH PMI → MUC Jul 26, 15:45 UTCJul 26, 17:40 UTC1h 55m
2026-07-26 OCN1GN IBZ → FRA Jul 26, 12:25 UTCJul 26, 14:25 UTC2h 0m
2026-07-26 OCN23F FRA → IBZ Jul 26, 09:05 UTCJul 26, 11:10 UTC2h 5m
2026-07-26 OCN5MC DBV → FRA Jul 26, 05:50 UTCJul 26, 07:30 UTC1h 41m
2026-07-26 OCN2B RAK → FRA Jul 26, 03:30 UTCJul 26, 04:55 UTC1h 25m
2026-07-25 OCN5Q FNC → FNC Jul 25, 14:10 UTCJul 25, 18:00 UTC3h 50m
2026-07-25 OCN75M - Jul 25, 09:50 UTCJul 25, 13:00 UTC3h 10m
2026-07-25 OCN1GN IBZ → FRA Jul 25, 06:05 UTCJul 25, 08:10 UTC2h 5m
2026-07-25 OCN23F FRA → IBZ Jul 25, 03:05 UTCJul 25, 05:05 UTC2h 0m
2026-07-24 OCN5MC - Jul 24, 18:20 UTCJul 24, 18:40 UTC20m
2026-07-24 OCN5MC - Jul 24, 16:55 UTCJul 24, 18:15 UTC1h 20m
2026-07-24 OCN2B RAK → FRA Jul 24, 14:15 UTCJul 24, 15:55 UTC1h 40m
2026-07-24 OCN1GN IBZ → FRA Jul 24, 11:00 UTCJul 24, 13:00 UTC2h 0m
2026-07-24 OCN23F FRA → IBZ Jul 24, 08:00 UTCJul 24, 09:50 UTC1h 50m
2026-07-23 OCN8FC JTR → FRA Jul 23, 15:05 UTCJul 23, 17:55 UTC2h 50m
2026-07-23 OCN6HP FRA → JTR Jul 23, 11:20 UTCJul 23, 13:40 UTC2h 20m
2026-07-23 OCN4ES - Jul 23, 07:00 UTCJul 23, 10:10 UTC3h 10m
2026-07-23 OCN9ZF KVA → FRA Jul 23, 03:05 UTCJul 23, 05:35 UTC2h 30m
2026-07-22 OCN1GN - Jul 22, 11:30 UTCJul 22, 12:55 UTC1h 25m
2026-07-22 OCN23F FRA → IBZ Jul 22, 10:20 UTCJul 22, 11:25 UTC1h 5m
2026-07-21 OCN5Q FNC → FNC Jul 21, 14:25 UTCJul 21, 18:10 UTC3h 45m
2026-07-21 OCN75M FRA → LCA Jul 21, 09:40 UTCJul 21, 13:00 UTC3h 20m
2026-07-20 OCN2WK - Jul 20, 17:25 UTCJul 20, 18:55 UTC1h 30m
2026-07-20 OCN4EK - Jul 20, 15:00 UTCJul 20, 16:00 UTC1h 0m
2026-07-20 OCN1GN IBZ → FRA Jul 20, 11:15 UTCJul 20, 13:20 UTC2h 5m
2026-07-20 OCN23F FRA → IBZ Jul 20, 07:55 UTCJul 20, 10:05 UTC2h 10m
2026-07-19 OCN515 - Jul 19, 19:00 UTCJul 19, 20:45 UTC1h 45m
2026-07-19 OCN6NH PMI → MUC Jul 19, 15:50 UTCJul 19, 17:35 UTC1h 45m
2026-07-19 OCN1GN IBZ → FRA Jul 19, 12:35 UTCJul 19, 14:30 UTC1h 55m
2026-07-19 OCN23F FRA → IBZ Jul 19, 09:30 UTCJul 19, 11:30 UTC2h 0m
2026-07-19 OCN5MC - Jul 19, 05:40 UTCJul 19, 07:40 UTC2h 0m
2026-07-19 OCN2B RAK → FRA Jul 19, 03:20 UTCJul 19, 04:45 UTC1h 25m
2026-07-18 OCN5Q FNC → FNC Jul 18, 14:10 UTCJul 18, 18:20 UTC4h 10m
2026-07-18 OCN75M FRA → LCA Jul 18, 09:35 UTCJul 18, 12:50 UTC3h 15m
2026-07-17 OCN5MC DBV → FRA Jul 17, 18:34 UTCJul 17, 20:10 UTC1h 35m
2026-07-17 OCN2B FRA → DBV Jul 17, 15:25 UTCJul 17, 16:49 UTC1h 25m
2026-07-17 OCN1GN IBZ → FRA Jul 17, 11:00 UTCJul 17, 13:00 UTC2h 0m
2026-07-17 OCN23F FRA → IBZ Jul 17, 07:55 UTCJul 17, 09:55 UTC2h 0m
2026-07-16 OCN2WK - Jul 16, 18:25 UTCJul 16, 19:45 UTC1h 20m
2026-07-16 OCN4EK - Jul 16, 15:25 UTCJul 16, 16:30 UTC1h 5m
2026-07-16 OCN1GN IBZ → FRA Jul 16, 11:45 UTCJul 16, 13:49 UTC2h 5m
2026-07-16 OCN23F FRA → IBZ Jul 16, 08:25 UTCJul 16, 10:25 UTC2h 0m
2026-07-15 OCN515 - Jul 15, 19:40 UTCJul 15, 21:30 UTC1h 50m
2026-07-15 OCN6NH PMI → MUC Jul 15, 16:45 UTCJul 15, 18:35 UTC1h 50m
2026-07-15 OCN1GN IBZ → FRA Jul 15, 10:50 UTCJul 15, 12:50 UTC2h 0m
2026-07-15 OCN23F FRA → IBZ Jul 15, 07:50 UTCJul 15, 09:45 UTC1h 55m
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

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 Jul 26, 20:55 UTC.
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.