Apparatus

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sensors Mode-S transponder

3C66B6

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUV · AIRBUS A-320

Hex
3C66B6
Octal
17063266
Decimal
3,958,454
Country
DE
Tail
D-AIUV
Type
A320
No current signal · last broadcast 7h ago
Flights observed
285
Distinct callsigns
20
Country
DE
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 3C66B6.

Country allocation

The ICAO 24-bit address 3C66B6 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
OCN1RK - 19 2026-07-10
OCN75M - 16 2026-07-11
OCN5Q O Air 16 2026-07-11
OCN2Y O Air 16 2026-07-10
OCN8FE - 11 2026-07-13
OCN4WJ - 11 2026-07-13
OCN519 O Air 9 2026-07-12
OCN518 O Air 9 2026-07-12
OCN4EK - 8 2026-07-10
OCN2WK - 8 2026-07-10
OCN5MC - 7 2026-06-28
OCN2B - 7 2026-06-28
OCN23F - 6 2026-07-09
OCN1GN - 6 2026-07-09
OCN9ZF - 5 2026-07-14
OCN4TC - 5 2026-07-08
OCN4ES - 5 2026-07-14
OCN3PH - 5 2026-07-12
OCN2JV - 5 2026-07-08
OCN1TN - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 OCN5ZT JMK → FRA Jul 14, 16:45 UTCJul 14, 19:35 UTC2h 50m
2026-07-14 OCN92G FRA → JMK Jul 14, 13:15 UTCJul 14, 15:40 UTC2h 25m
2026-07-14 OCN4ES - Jul 14, 07:55 UTCJul 14, 11:05 UTC3h 10m
2026-07-14 OCN9ZF - Jul 14, 04:05 UTCJul 14, 06:25 UTC2h 20m
2026-07-13 OCN515 - Jul 13, 18:15 UTCJul 13, 20:05 UTC1h 50m
2026-07-13 OCN6NH PMI → MUC Jul 13, 15:15 UTCJul 13, 17:05 UTC1h 50m
2026-07-13 OCN8FE - Jul 13, 12:10 UTCJul 13, 14:00 UTC1h 50m
2026-07-13 OCN4WJ - Jul 13, 08:40 UTCJul 13, 10:30 UTC1h 50m
2026-07-13 OCN1001 MUC → FRA Jul 13, 06:45 UTCJul 13, 07:25 UTC40m
2026-07-13 OCN1000 FRA → MUC Jul 13, 04:55 UTCJul 13, 05:31 UTC35m
2026-07-12 OCN519 PMI → FRA Jul 12, 16:20 UTCJul 12, 18:01 UTC1h 40m
2026-07-12 OCN518 FRA → PMI Jul 12, 13:15 UTCJul 12, 15:01 UTC1h 45m
2026-07-12 OCN7KN ZTH → FRA Jul 12, 09:15 UTCJul 12, 11:35 UTC2h 20m
2026-07-12 OCN1214 - Jul 12, 05:40 UTCJul 12, 08:10 UTC2h 30m
2026-07-12 OCN3PH - Jul 12, 00:30 UTCJul 12, 04:05 UTC3h 35m
2026-07-11 OCN1TN FRA → LCA Jul 11, 20:05 UTCJul 11, 23:20 UTC3h 15m
2026-07-11 OCN5Q FNC → FNC Jul 11, 14:15 UTCJul 11, 18:10 UTC3h 55m
2026-07-11 OCN75M FRA → LCA Jul 11, 09:40 UTCJul 11, 13:00 UTC3h 20m
2026-07-10 OCN2Y FNC → FRA Jul 10, 14:45 UTCJul 10, 18:20 UTC3h 35m
2026-07-10 OCN1RK - Jul 10, 13:25 UTCJul 10, 13:30 UTC5m
2026-07-10 OCN1RK - Jul 10, 09:45 UTCJul 10, 12:50 UTC3h 5m
2026-07-10 OCN2WK - Jul 10, 05:50 UTCJul 10, 07:20 UTC1h 30m
2026-07-10 OCN4EK - Jul 10, 03:25 UTCJul 10, 04:25 UTC1h 0m
2026-07-09 OCN515 PMI → FRA Jul 9, 18:25 UTCJul 9, 20:15 UTC1h 50m
2026-07-09 OCN6NH PMI → MUC Jul 9, 15:30 UTCJul 9, 17:15 UTC1h 45m
2026-07-09 OCN1GN IBZ → FRA Jul 9, 11:35 UTCJul 9, 14:00 UTC2h 25m
2026-07-09 OCN23F - Jul 9, 08:15 UTCJul 9, 10:15 UTC2h 0m
2026-07-08 OCN2JV - Jul 8, 10:50 UTCJul 8, 13:45 UTC2h 55m
2026-07-08 OCN4TC FRA → KGS Jul 8, 07:05 UTCJul 8, 09:35 UTC2h 30m
2026-07-07 OCN2Y FNC → FRA Jul 7, 14:50 UTCJul 7, 18:30 UTC3h 40m
2026-07-07 OCN1RK FRA → FNC Jul 7, 09:55 UTCJul 7, 13:40 UTC3h 45m
2026-07-06 OCN34D - Jul 6, 17:25 UTCJul 6, 19:45 UTC2h 20m
2026-07-06 OCN1408 - Jul 6, 14:15 UTCJul 6, 16:15 UTC2h 0m
2026-07-06 OCN2SD - Jul 6, 06:50 UTCJul 6, 09:45 UTC2h 55m
2026-07-06 OCN4LY FRA → CHQ Jul 6, 03:10 UTCJul 6, 05:40 UTC2h 30m
2026-07-05 OCN5Q FNC → FNC Jul 5, 14:30 UTCJul 5, 18:15 UTC3h 45m
2026-07-05 OCN75M - Jul 5, 10:00 UTCJul 5, 13:15 UTC3h 15m
2026-07-05 OCN3PH - Jul 5, 00:40 UTCJul 5, 04:25 UTC3h 45m
2026-07-04 OCN1TN - Jul 4, 20:20 UTCJul 4, 23:20 UTC3h 0m
2026-07-04 OCN1343 - Jul 4, 14:30 UTCJul 4, 17:05 UTC2h 35m
2026-07-04 OCN3GB FRA → BOO Jul 4, 10:20 UTCJul 4, 13:10 UTC2h 50m
2026-07-04 OCN2057 PMI → FRA Jul 4, 07:05 UTCJul 4, 09:05 UTC2h 0m
2026-07-04 OCN2056 FRA → PMI Jul 4, 03:50 UTCJul 4, 05:40 UTC1h 50m
2026-07-03 OCN5ZT JMK → FRA Jul 3, 15:25 UTCJul 3, 18:15 UTC2h 50m
2026-07-03 OCN92G FRA → JMK Jul 3, 11:50 UTCJul 3, 14:10 UTC2h 20m
2026-07-02 OCN2WK - Jul 2, 17:40 UTCJul 2, 18:55 UTC1h 15m
2026-07-02 OCN4EK - Jul 2, 15:05 UTCJul 2, 16:05 UTC1h 0m
2026-07-02 OCN1GN IBZ → FRA Jul 2, 11:15 UTCJul 2, 13:20 UTC2h 5m
2026-07-02 OCN23F FRA → IBZ Jul 2, 08:05 UTCJul 2, 09:55 UTC1h 50m
2026-06-29 OCN6QV EFL → FRA Jun 29, 15:24 UTCJun 29, 17:40 UTC2h 15m

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

Mode-S 3C66B6 frequently asked

What is Mode-S code 3C66B6?
3C66B6 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUV.
Where is Mode-S 3C66B6 registered?
Mode-S code 3C66B6 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66B6 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66B6, octal 17063266, decimal 3,958,454.
What flights does 3C66B6 operate?
Mode-S 3C66B6 has broadcast 20 distinct callsigns, including OCN1RK, OCN75M, OCN5Q, OCN2Y, OCN8FE.