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sensors Mode-S transponder

3C6561

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIKA · AIRBUS A-330-300

Hex
3C6561
Octal
17062541
Decimal
3,958,113
Country
DE
Tail
D-AIKA
Type
A333
No current signal · last broadcast Jul 26, 20:50 UTC
Flights observed
173
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 20:50 UTC

Last known position

Most recent position reported by Mode-S 3C6561.

Country allocation

The ICAO 24-bit address 3C6561 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
OCN133 O Air 22 2026-07-26
OCN132W O Air 16 2026-07-25
OCN642 O Air 14 2026-07-23
OCN659 O Air 13 2026-07-23
OCN51 - 13 2026-07-13
OCN50 - 13 2026-07-13
OCN69 O Air 9 2026-07-20
OCN68 O Air 9 2026-07-19
OCN135K - 9 2026-07-03
OCN12 - 6 2026-07-06
OCN11 - 6 2026-07-05
OCN77 - 5 2026-06-27
OCN76 - 5 2026-06-27
OCN137 - 5 2026-07-21
OCN75 O Air 4 2026-06-02
OCN74 O Air 4 2026-06-02
OCN131 O Air 3 2026-07-24
OCN617 - 2 2026-06-26
OCN3 O Air 2 2026-07-18
OCN2102 O Air 2 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 OCN133 WDH → FRA Jul 26, 20:35 UTCJul 26, 20:50 UTC15m
2026-07-25 OCN132W FRA → WDH Jul 25, 20:15 UTCJul 25, 22:10 UTC1h 55m
2026-07-24 OCN131 MBA → FRA Jul 24, 20:20 UTCJul 25, 15:40 UTC19h 20m
2026-07-24 OCN131 MBA → FRA Jul 24, 18:50 UTCJul 25, 15:40 UTC20h 50m
2026-07-23 OCN659 TPA → FRA Jul 23, 22:30 UTCJul 24, 07:05 UTC8h 35m
2026-07-23 OCN642 FRA → TPA Jul 23, 09:50 UTCJul 23, 18:55 UTC9h 5m
2026-07-22 OCN133 WDH → FRA Jul 22, 20:40 UTCJul 23, 03:10 UTC6h 30m
2026-07-22 OCN133 WDH → FRA Jul 22, 04:20 UTCJul 23, 03:10 UTC22h 50m
2026-07-22 OCN133 WDH → FRA Jul 22, 03:35 UTCJul 23, 02:15 UTC22h 40m
2026-07-21 OCN132W - Jul 21, 20:25 UTCJul 22, 04:20 UTC7h 55m
2026-07-21 OCN137 - Jul 21, 13:05 UTCJul 21, 16:55 UTC3h 50m
2026-07-20 OCN137 - Jul 20, 18:20 UTCJul 21, 16:55 UTC22h 35m
2026-07-20 OCN136 - Jul 20, 17:55 UTCJul 21, 16:15 UTC22h 19m
2026-07-20 OCN69 MCO → FRA Jul 20, 00:45 UTCJul 20, 10:20 UTC9h 35m
2026-07-19 OCN68 FRA → MCO Jul 19, 11:55 UTCJul 19, 21:20 UTC9h 25m
2026-07-18 OCN3 PUJ → FRA Jul 18, 12:20 UTCJul 19, 07:55 UTC19h 35m
2026-07-18 OCN2 FRA → PUJ Jul 18, 11:15 UTCJul 19, 07:55 UTC20h 40m
2026-07-17 OCN133 WDH → FRA Jul 17, 00:35 UTCJul 17, 03:05 UTC2h 30m
2026-07-16 OCN133 WDH → FRA Jul 16, 04:20 UTCJul 17, 03:05 UTC22h 45m
2026-07-16 OCN133 WDH → FRA Jul 16, 02:20 UTCJul 17, 02:15 UTC23h 55m
2026-07-15 OCN132W - Jul 15, 20:20 UTCJul 16, 04:20 UTC8h 0m
2026-07-15 OCN131 - Jul 15, 11:40 UTCJul 15, 15:05 UTC3h 25m
2026-07-14 OCN130 - Jul 14, 18:45 UTCJul 15, 11:00 UTC16h 14m
2026-07-13 OCN51 PHL → FRA Jul 13, 21:55 UTCJul 14, 05:15 UTC7h 20m
2026-07-13 OCN50 FRA → PHL Jul 13, 11:45 UTCJul 13, 19:50 UTC8h 5m
2026-07-12 OCN659 TPA → FRA Jul 12, 22:05 UTCJul 13, 06:55 UTC8h 50m
2026-07-12 OCN642 FRA → TPA Jul 12, 10:10 UTCJul 12, 20:05 UTC9h 55m
2026-07-11 OCN133 - Jul 11, 01:25 UTCJul 11, 03:20 UTC1h 55m
2026-07-10 OCN133 - Jul 10, 02:20 UTCJul 11, 02:15 UTC23h 55m
2026-07-09 OCN132W - Jul 9, 20:10 UTCJul 10, 02:25 UTC6h 15m
2026-07-09 OCN69 MCO → FRA Jul 9, 00:55 UTCJul 9, 09:40 UTC8h 45m
2026-07-08 OCN68 FRA → MCO Jul 8, 12:45 UTCJul 8, 22:15 UTC9h 30m
2026-07-08 OCN69 - Jul 8, 00:50 UTCJul 8, 09:45 UTC8h 55m
2026-07-07 OCN68 - Jul 7, 12:00 UTCJul 7, 21:40 UTC9h 40m
2026-07-06 OCN12 - Jul 6, 04:25 UTCJul 6, 14:40 UTC10h 15m
2026-07-05 OCN11 - Jul 5, 11:55 UTCJul 5, 23:15 UTC11h 20m
2026-07-05 OCN133 - Jul 5, 01:05 UTCJul 5, 03:05 UTC2h 0m
2026-07-04 OCN133 - Jul 4, 04:20 UTCJul 5, 03:05 UTC22h 45m
2026-07-04 OCN132W FRA → WDH Jul 4, 02:20 UTCJul 5, 02:15 UTC23h 55m
2026-07-03 OCN132W FRA → WDH Jul 3, 20:25 UTCJul 4, 04:30 UTC8h 5m
2026-07-03 OCN135K - Jul 3, 13:30 UTCJul 3, 17:05 UTC3h 35m
2026-07-02 OCN135K - Jul 2, 20:20 UTCJul 3, 17:05 UTC20h 45m
2026-07-02 OCN135K FRA → FRA Jul 2, 18:25 UTCJul 3, 17:05 UTC22h 40m
2026-07-02 OCN12 LAS → FRA Jul 2, 04:30 UTCJul 2, 14:20 UTC9h 50m
2026-07-01 OCN11 FRA → LAS Jul 1, 12:40 UTCJul 1, 23:45 UTC11h 5m
2026-07-01 OCN69 MCO → FRA Jul 1, 01:15 UTCJul 1, 09:50 UTC8h 35m
2026-06-30 OCN68 - Jun 30, 12:20 UTCJun 30, 22:00 UTC9h 40m
2026-06-30 OCN69 MCO → FRA Jun 30, 00:35 UTCJun 30, 08:45 UTC8h 10m
2026-06-29 OCN68 FRA → MCO Jun 29, 12:20 UTCJun 29, 22:10 UTC9h 50m
2026-06-29 OCN69 - Jun 29, 00:14 UTCJun 29, 08:39 UTC8h 25m

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

Mode-S 3C6561 frequently asked

What is Mode-S code 3C6561?
3C6561 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIKA.
Where is Mode-S 3C6561 registered?
Mode-S code 3C6561 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C6561 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C6561, octal 17062541, decimal 3,958,113.
What flights does 3C6561 operate?
Mode-S 3C6561 has broadcast 20 distinct callsigns, including OCN133, OCN132W, OCN642, OCN659, OCN51.