Apparatus

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sensors Mode-S transponder

3C66BA

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUZ · AIRBUS A-320

Hex
3C66BA
Octal
17063272
Decimal
3,958,458
Country
DE
Tail
D-AIUZ
Type
A320
No current signal · last broadcast 12h ago
Flights observed
289
Distinct callsigns
20
Country
DE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 3C66BA.

Country allocation

The ICAO 24-bit address 3C66BA 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 - 18 2026-07-08
OCN5Q O Air 13 2026-06-25
OCN2Y O Air 12 2026-07-08
OCN75M - 11 2026-06-25
OCN8FE - 10 2026-07-12
OCN7YZ - 10 2026-07-13
OCN4WJ - 10 2026-07-12
OCN3ME - 10 2026-07-13
OCN9ZF - 8 2026-07-09
OCN4ES - 8 2026-07-09
OCN6NH O Air 7 2026-06-18
OCN515 O Air 7 2026-06-18
OCN6AQ - 6 2026-07-11
OCN4XK - 6 2026-07-11
OCN9DY - 5 2026-06-05
OCN8FC O Air 5 2026-07-09
OCN6HP O Air 5 2026-07-09
OCN5AN O Air 5 2026-05-28
OCN4TC - 5 2026-07-06
OCN34D - 5 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 OCN3ME - Jul 13, 16:35 UTCJul 13, 19:40 UTC3h 5m
2026-07-13 OCN7YZ - Jul 13, 12:50 UTCJul 13, 15:20 UTC2h 30m
2026-07-13 OCN2SD - Jul 13, 06:50 UTCJul 13, 09:55 UTC3h 5m
2026-07-13 OCN4LY - Jul 13, 03:15 UTCJul 13, 05:45 UTC2h 30m
2026-07-12 OCN2WK - Jul 12, 17:30 UTCJul 12, 18:55 UTC1h 25m
2026-07-12 OCN4EK - Jul 12, 15:01 UTCJul 12, 16:05 UTC1h 5m
2026-07-12 OCN8FE - Jul 12, 12:05 UTCJul 12, 13:55 UTC1h 50m
2026-07-12 OCN4WJ - Jul 12, 09:05 UTCJul 12, 10:45 UTC1h 40m
2026-07-12 OCN6GP - Jul 12, 05:35 UTCJul 12, 07:01 UTC1h 25m
2026-07-12 OCN910 - Jul 12, 03:25 UTCJul 12, 04:25 UTC1h 0m
2026-07-11 OCN4XK RHO → FRA Jul 11, 16:15 UTCJul 11, 19:15 UTC3h 0m
2026-07-11 OCN6AQ FRA → RHO Jul 11, 12:05 UTCJul 11, 14:45 UTC2h 40m
2026-07-11 OCN8FE - Jul 11, 08:30 UTCJul 11, 10:15 UTC1h 45m
2026-07-11 OCN4WJ - Jul 11, 05:15 UTCJul 11, 07:05 UTC1h 50m
2026-07-10 OCN601 - Jul 10, 18:25 UTCJul 10, 19:15 UTC50m
2026-07-10 OCN600 - Jul 10, 16:25 UTCJul 10, 17:20 UTC55m
2026-07-10 OCN519 PMI → FRA Jul 10, 13:30 UTCJul 10, 15:15 UTC1h 45m
2026-07-10 OCN518 FRA → PMI Jul 10, 10:30 UTCJul 10, 12:15 UTC1h 45m
2026-07-10 OCN8FE - Jul 10, 06:55 UTCJul 10, 08:45 UTC1h 50m
2026-07-10 OCN4WJ - Jul 10, 04:00 UTCJul 10, 05:45 UTC1h 45m
2026-07-09 OCN8FC JTR → FRA Jul 9, 14:55 UTCJul 9, 17:50 UTC2h 55m
2026-07-09 OCN6HP FRA → JTR Jul 9, 11:15 UTCJul 9, 13:40 UTC2h 25m
2026-07-09 OCN4ES - Jul 9, 07:05 UTCJul 9, 10:05 UTC3h 0m
2026-07-09 OCN9ZF - Jul 9, 03:05 UTCJul 9, 05:30 UTC2h 25m
2026-07-08 OCN2Y FNC → FRA Jul 8, 16:30 UTCJul 8, 20:15 UTC3h 45m
2026-07-08 OCN1RK - Jul 8, 15:10 UTCJul 8, 15:20 UTC10m
2026-07-08 OCN1RK - Jul 8, 11:30 UTCJul 8, 14:30 UTC3h 0m
2026-07-07 OCN2JR BOJ → FRA Jul 7, 16:40 UTCJul 7, 19:05 UTC2h 25m
2026-07-07 OCN6VT FRA → BOJ Jul 7, 13:30 UTCJul 7, 15:35 UTC2h 5m
2026-07-07 OCN6AR - Jul 7, 09:50 UTCJul 7, 12:00 UTC2h 10m
2026-07-07 OCN6MC - Jul 7, 06:35 UTCJul 7, 08:15 UTC1h 40m
2026-07-06 OCN3ME - Jul 6, 16:40 UTCJul 6, 19:30 UTC2h 50m
2026-07-06 OCN7YZ - Jul 6, 12:45 UTCJul 6, 15:15 UTC2h 30m
2026-07-06 OCN2JV KGS → FRA Jul 6, 07:10 UTCJul 6, 10:15 UTC3h 5m
2026-07-06 OCN4TC FRA → KGS Jul 6, 03:05 UTCJul 6, 05:40 UTC2h 35m
2026-07-05 OCN519 PMI → FRA Jul 5, 16:00 UTCJul 5, 17:55 UTC1h 55m
2026-07-05 OCN518 FRA → PMI Jul 5, 13:10 UTCJul 5, 14:55 UTC1h 45m
2026-07-05 OCN7KN ZTH → FRA Jul 5, 09:10 UTCJul 5, 11:40 UTC2h 30m
2026-07-05 OCN1214 - Jul 5, 05:50 UTCJul 5, 07:55 UTC2h 5m
2026-07-04 DAIUZ - Jul 4, 20:30 UTCJul 4, 22:35 UTC2h 5m
2026-07-04 OCN4XK RHO → FRA Jul 4, 15:40 UTCJul 4, 19:15 UTC3h 35m
2026-07-04 OCN6AQ FRA → RHO Jul 4, 11:55 UTCJul 4, 14:35 UTC2h 40m
2026-07-04 OCN8FE - Jul 4, 08:20 UTCJul 4, 10:10 UTC1h 50m
2026-07-04 OCN4WJ - Jul 4, 05:05 UTCJul 4, 06:55 UTC1h 50m
2026-07-03 OCN6AR - Jul 3, 16:05 UTCJul 3, 17:50 UTC1h 45m
2026-07-03 OCN6MC - Jul 3, 12:45 UTCJul 3, 14:20 UTC1h 35m
2026-07-03 OCN2153 HER → FRA Jul 3, 08:10 UTCJul 3, 11:05 UTC2h 55m
2026-07-03 OCN1EL - Jul 3, 04:05 UTCJul 3, 06:35 UTC2h 30m
2026-07-02 OCN2165 OPO → FRA Jul 2, 15:10 UTCJul 2, 17:25 UTC2h 15m
2026-07-02 OCN4QL FRA → OPO Jul 2, 11:20 UTCJul 2, 13:55 UTC2h 35m

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

Mode-S 3C66BA frequently asked

What is Mode-S code 3C66BA?
3C66BA is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUZ.
Where is Mode-S 3C66BA registered?
Mode-S code 3C66BA is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66BA broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66BA, octal 17063272, decimal 3,958,458.
What flights does 3C66BA operate?
Mode-S 3C66BA has broadcast 20 distinct callsigns, including OCN1RK, OCN5Q, OCN2Y, OCN75M, OCN8FE.