Apparatus

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sensors Mode-S transponder

3C66B3

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUS · AIRBUS A-320

Hex
3C66B3
Octal
17063263
Decimal
3,958,451
Country
DE
Tail
D-AIUS
Type
A320
Broadcasting now · callsign OCN1408 · 10,525 ft
Flights observed
314
Distinct callsigns
20
Country
DE
Last broadcast
1h ago

Current position

3C66B3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C66B3 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
OCN5SG - 18 2026-07-09
OCN803 - 16 2026-07-09
OCN5MC - 12 2026-06-27
OCN2B - 12 2026-06-30
OCN9ZF - 10 2026-07-11
OCN4ES - 10 2026-07-11
OCN8FC O Air 9 2026-07-11
OCN6HP O Air 9 2026-07-11
OCN9PG O Air 8 2026-07-02
OCN537 O Air 8 2026-07-02
OCN6NH O Air 7 2026-07-08
OCN5AN - 7 2026-06-21
OCN515 - 7 2026-07-08
OCN807 O Air 6 2026-07-13
OCN806 - 5 2026-07-13
OCN6JG - 5 2026-06-29
OCN519 O Air 5 2026-07-09
OCN518 O Air 5 2026-07-09
OCN3TY - 5 2026-06-29
OCN8NT O Air 4 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 OCN1408 - Jul 14, 06:05 UTCJul 14, 06:45 UTC40m
2026-07-13 OCN34D - Jul 13, 17:40 UTCJul 13, 20:10 UTC2h 30m
2026-07-13 OCN1408 - Jul 13, 14:25 UTCJul 13, 16:25 UTC2h 0m
2026-07-13 OCN807 BDS → FRA Jul 13, 10:40 UTCJul 13, 12:40 UTC2h 0m
2026-07-13 OCN806 - Jul 13, 07:45 UTCJul 13, 09:20 UTC1h 35m
2026-07-12 OCN301 - Jul 12, 17:50 UTCJul 12, 21:25 UTC3h 35m
2026-07-12 OCN1CF FRA → FUE Jul 12, 11:55 UTCJul 12, 16:01 UTC4h 5m
2026-07-12 OCN4XK RHO → FRA Jul 12, 07:05 UTCJul 12, 10:05 UTC3h 0m
2026-07-12 OCN6AQ FRA → RHO Jul 12, 03:01 UTCJul 12, 05:45 UTC2h 45m
2026-07-11 OCN8FC JTR → FRA Jul 11, 16:10 UTCJul 11, 19:00 UTC2h 50m
2026-07-11 OCN6HP FRA → JTR Jul 11, 12:05 UTCJul 11, 14:35 UTC2h 30m
2026-07-11 OCN4ES - Jul 11, 07:45 UTCJul 11, 10:30 UTC2h 45m
2026-07-11 OCN9ZF - Jul 11, 03:15 UTCJul 11, 05:45 UTC2h 30m
2026-07-10 OCN1213 RAK → RAK Jul 10, 16:50 UTCJul 10, 19:20 UTC2h 30m
2026-07-10 OCN3FB FRA → JSI Jul 10, 13:45 UTCJul 10, 15:40 UTC1h 55m
2026-07-10 OCN807 BDS → FRA Jul 10, 09:55 UTCJul 10, 11:50 UTC1h 55m
2026-07-10 OCN806 - Jul 10, 06:55 UTCJul 10, 08:30 UTC1h 35m
2026-07-09 OCN519 PMI → FRA Jul 9, 15:45 UTCJul 9, 17:30 UTC1h 45m
2026-07-09 OCN518 FRA → PMI Jul 9, 12:50 UTCJul 9, 14:30 UTC1h 40m
2026-07-09 OCN803 - Jul 9, 09:30 UTCJul 9, 11:20 UTC1h 50m
2026-07-09 OCN5SG - Jul 9, 06:40 UTCJul 9, 08:15 UTC1h 35m
2026-07-08 OCN515 - Jul 8, 17:55 UTCJul 8, 19:55 UTC2h 0m
2026-07-08 OCN6NH PMI → MUC Jul 8, 15:10 UTCJul 8, 16:45 UTC1h 35m
2026-07-08 OCN215 MIR → FRA Jul 8, 09:00 UTCJul 8, 11:20 UTC2h 20m
2026-07-08 OCN14M FRA → MIR Jul 8, 05:45 UTCJul 8, 07:45 UTC2h 0m
2026-07-06 OCN2WK - Jul 6, 17:35 UTCJul 6, 18:55 UTC1h 20m
2026-07-06 OCN4EK - Jul 6, 14:55 UTCJul 6, 16:10 UTC1h 15m
2026-07-06 OCN807 BDS → FRA Jul 6, 10:45 UTCJul 6, 12:45 UTC2h 0m
2026-07-06 OCN806 FRA → BDS Jul 6, 08:05 UTCJul 6, 09:40 UTC1h 35m
2026-07-05 OCN21K - Jul 5, 16:50 UTCJul 5, 21:00 UTC4h 10m
2026-07-05 OCN3HT - Jul 5, 11:20 UTCJul 5, 15:30 UTC4h 10m
2026-07-05 OCN4ES - Jul 5, 06:55 UTCJul 5, 09:50 UTC2h 55m
2026-07-05 OCN9ZF - Jul 5, 03:10 UTCJul 5, 05:35 UTC2h 25m
2026-07-04 OCN8FC JTR → FRA Jul 4, 15:45 UTCJul 4, 18:30 UTC2h 45m
2026-07-04 OCN6HP FRA → JTR Jul 4, 11:45 UTCJul 4, 14:10 UTC2h 25m
2026-07-04 OCN4ES - Jul 4, 07:15 UTCJul 4, 10:10 UTC2h 55m
2026-07-04 OCN9ZF - Jul 4, 03:05 UTCJul 4, 05:35 UTC2h 30m
2026-07-03 OCN1213 RAK → RAK Jul 3, 16:25 UTCJul 3, 18:50 UTC2h 25m
2026-07-03 OCN3FB FRA → JSI Jul 3, 13:10 UTCJul 3, 15:05 UTC1h 55m
2026-07-03 OCN807 BDS → FRA Jul 3, 09:50 UTCJul 3, 11:45 UTC1h 55m
2026-07-03 OCN806 - Jul 3, 07:00 UTCJul 3, 08:30 UTC1h 30m
2026-07-02 OCN537 MAH → FRA Jul 2, 14:45 UTCJul 2, 16:30 UTC1h 45m
2026-07-02 OCN9PG FRA → MAH Jul 2, 12:10 UTCJul 2, 13:40 UTC1h 30m
2026-07-02 OCN803 - Jul 2, 09:00 UTCJul 2, 10:50 UTC1h 50m
2026-07-02 OCN5SG - Jul 2, 06:15 UTCJul 2, 07:45 UTC1h 30m
2026-07-01 OCN515 - Jul 1, 18:30 UTCJul 1, 20:30 UTC2h 0m
2026-07-01 OCN6NH PMI → MUC Jul 1, 15:20 UTCJul 1, 17:10 UTC1h 50m
2026-07-01 OCN2JV - Jul 1, 11:10 UTCJul 1, 14:00 UTC2h 50m
2026-07-01 OCN4TC FRA → KGS Jul 1, 07:05 UTCJul 1, 09:55 UTC2h 50m
2026-06-30 OCN2B FRA → FRA Jun 30, 14:15 UTCJun 30, 17:25 UTC3h 10m

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

Mode-S 3C66B3 frequently asked

What is Mode-S code 3C66B3?
3C66B3 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUS.
Where is Mode-S 3C66B3 registered?
Mode-S code 3C66B3 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66B3 broadcasting right now?
Yes. Mode-S 3C66B3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66B3, octal 17063263, decimal 3,958,451.
What flights does 3C66B3 operate?
Mode-S 3C66B3 has broadcast 20 distinct callsigns, including OCN5SG, OCN803, OCN5MC, OCN2B, OCN9ZF.