Apparatus

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sensors Mode-S transponder

3C66B2

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIUR · AIRBUS A-320

Hex
3C66B2
Octal
17063262
Decimal
3,958,450
Country
DE
Tail
D-AIUR
Type
A320
Broadcasting now · callsign OCN6AR · 36,000 ft
Flights observed
301
Distinct callsigns
20
Country
DE
Last broadcast
22m ago

Current position

3C66B2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C66B2 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
OCN8FE - 14 2026-07-09
OCN4WJ - 14 2026-07-09
OCN5Q O Air 13 2026-07-04
OCN75M - 11 2026-07-04
OCN3PH - 11 2026-07-04
OCN4EK - 10 2026-07-11
OCN2WK - 10 2026-07-11
OCN1TN - 10 2026-07-03
OCN9ZF - 9 2026-07-13
OCN4ES - 9 2026-07-13
OCN6NH O Air 7 2026-06-14
OCN515 O Air 7 2026-06-14
OCN6JG - 6 2026-07-12
OCN3TY - 6 2026-07-12
OCN34D - 6 2026-07-07
OCN1RK O Air 6 2026-06-02
OCN1408 - 6 2026-07-07
OCN6MC - 5 2026-07-14
OCN6AR - 5 2026-07-14
OCN6AQ - 5 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 OCN6AR - Jul 14, 09:55 UTCJul 14, 10:30 UTC35m
2026-07-14 OCN6MC - Jul 14, 06:45 UTCJul 14, 08:20 UTC1h 35m
2026-07-13 OCN6QV EFL → FRA Jul 13, 15:35 UTCJul 13, 18:10 UTC2h 35m
2026-07-13 OCN39T FRA → EFL Jul 13, 12:25 UTCJul 13, 14:30 UTC2h 5m
2026-07-13 OCN4ES - Jul 13, 07:25 UTCJul 13, 10:20 UTC2h 55m
2026-07-13 OCN9ZF - Jul 13, 03:20 UTCJul 13, 05:55 UTC2h 35m
2026-07-12 OCN6JG - Jul 12, 13:30 UTCJul 12, 16:10 UTC2h 40m
2026-07-12 OCN3TY - Jul 12, 09:45 UTCJul 12, 12:15 UTC2h 30m
2026-07-12 OCN6AR - Jul 12, 06:20 UTCJul 12, 08:25 UTC2h 5m
2026-07-12 OCN6MC - Jul 12, 03:05 UTCJul 12, 04:50 UTC1h 45m
2026-07-11 OCN2WK - Jul 11, 17:35 UTCJul 11, 18:55 UTC1h 20m
2026-07-11 OCN4EK - Jul 11, 14:40 UTCJul 11, 15:45 UTC1h 5m
2026-07-11 OCN8G SNN → FRA Jul 11, 11:40 UTCJul 11, 13:20 UTC1h 40m
2026-07-11 OCN1ZM - Jul 11, 08:35 UTCJul 11, 10:15 UTC1h 40m
2026-07-10 OCN4XK RHO → FRA Jul 10, 15:40 UTCJul 10, 18:50 UTC3h 10m
2026-07-10 OCN6AQ FRA → RHO Jul 10, 11:50 UTCJul 10, 14:30 UTC2h 40m
2026-07-10 OCN6GP - Jul 10, 09:05 UTCJul 10, 10:25 UTC1h 20m
2026-07-10 OCN910 - Jul 10, 06:55 UTCJul 10, 08:00 UTC1h 5m
2026-07-09 OCN2WK - Jul 9, 17:50 UTCJul 9, 19:10 UTC1h 20m
2026-07-09 OCN4EK - Jul 9, 15:30 UTCJul 9, 16:35 UTC1h 5m
2026-07-09 OCN8FE PMI → FRA Jul 9, 11:50 UTCJul 9, 13:45 UTC1h 55m
2026-07-09 OCN4WJ - Jul 9, 09:00 UTCJul 9, 10:40 UTC1h 40m
2026-07-09 OCN1001 - Jul 9, 06:40 UTCJul 9, 07:20 UTC40m
2026-07-09 OCN1000 - Jul 9, 05:00 UTCJul 9, 05:40 UTC40m
2026-07-08 OCN8FE - Jul 8, 11:35 UTCJul 8, 13:30 UTC1h 55m
2026-07-08 OCN4WJ - Jul 8, 08:45 UTCJul 8, 10:25 UTC1h 40m
2026-07-08 OCN1001 - Jul 8, 06:40 UTCJul 8, 07:15 UTC35m
2026-07-08 OCN1000 - Jul 8, 04:55 UTCJul 8, 05:40 UTC45m
2026-07-07 OCN1213 RAK → RAK Jul 7, 16:25 UTCJul 7, 18:45 UTC2h 20m
2026-07-07 OCN3FB FRA → JSI Jul 7, 12:50 UTCJul 7, 14:55 UTC2h 5m
2026-07-07 OCN34D - Jul 7, 09:00 UTCJul 7, 11:20 UTC2h 20m
2026-07-07 OCN1408 - Jul 7, 05:40 UTCJul 7, 07:50 UTC2h 10m
2026-07-06 OCN6QV - Jul 6, 15:20 UTCJul 6, 17:45 UTC2h 25m
2026-07-06 OCN39T FRA → EFL Jul 6, 12:10 UTCJul 6, 14:20 UTC2h 10m
2026-07-06 OCN4ES - Jul 6, 07:10 UTCJul 6, 10:05 UTC2h 55m
2026-07-06 OCN9ZF - Jul 6, 03:10 UTCJul 6, 05:40 UTC2h 30m
2026-07-05 OCN6JG - Jul 5, 13:25 UTCJul 5, 16:05 UTC2h 40m
2026-07-05 OCN3TY - Jul 5, 09:35 UTCJul 5, 12:10 UTC2h 35m
2026-07-05 OCN6AR - Jul 5, 06:15 UTCJul 5, 08:20 UTC2h 5m
2026-07-05 OCN6MC - Jul 5, 03:00 UTCJul 5, 04:40 UTC1h 40m
2026-07-04 OCN5Q FNC → FNC Jul 4, 14:00 UTCJul 4, 17:55 UTC3h 55m
2026-07-04 OCN75M - Jul 4, 09:30 UTCJul 4, 12:40 UTC3h 10m
2026-07-04 OCN3PH - Jul 4, 00:20 UTCJul 4, 04:05 UTC3h 45m
2026-07-03 OCN1TN - Jul 3, 20:05 UTCJul 3, 23:10 UTC3h 5m
2026-07-03 OCN5Q FNC → FNC Jul 3, 14:05 UTCJul 3, 17:50 UTC3h 45m
2026-07-03 OCN75M - Jul 3, 09:35 UTCJul 3, 12:45 UTC3h 10m
2026-07-03 OCN1001 MUC → FRA Jul 3, 05:45 UTCJul 3, 06:25 UTC40m
2026-07-03 OCN1000 FRA → MUC Jul 3, 03:55 UTCJul 3, 04:35 UTC40m
2026-07-02 OCN5Q FNC → FNC Jul 2, 14:30 UTCJul 2, 18:05 UTC3h 35m
2026-07-02 OCN75M - Jul 2, 10:05 UTCJul 2, 13:20 UTC3h 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-AIUR page for operator, model, and routing details .

Mode-S 3C66B2 frequently asked

What is Mode-S code 3C66B2?
3C66B2 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIUR.
Where is Mode-S 3C66B2 registered?
Mode-S code 3C66B2 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C66B2 broadcasting right now?
Yes. Mode-S 3C66B2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C66B2, octal 17063262, decimal 3,958,450.
What flights does 3C66B2 operate?
Mode-S 3C66B2 has broadcast 20 distinct callsigns, including OCN8FE, OCN4WJ, OCN5Q, OCN75M, OCN3PH.