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
- Flights observed
- 74
- Distinct callsigns
- 19
- Country
- DE
- Last broadcast
- 1h ago
Last known position
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 19 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| OCN642 | O Air | 9 | 2026-05-22 |
| OCN133 | O Air | 9 | 2026-05-18 |
| OCN659 | O Air | 8 | 2026-05-22 |
| OCN132W | O Air | 8 | 2026-05-17 |
| OCN51 | O Air | 6 | 2026-05-27 |
| OCN50 | O Air | 6 | 2026-05-27 |
| OCN75 | O Air | 3 | 2026-05-24 |
| OCN74 | O Air | 3 | 2026-05-24 |
| OCN69 | O Air | 3 | 2026-05-24 |
| OCN68 | O Air | 3 | 2026-05-23 |
| OCN135K | O Air | 3 | 2026-05-12 |
| OCN77 | O Air | 2 | 2026-05-27 |
| OCN76 | O Air | 2 | 2026-05-26 |
| OCN2102 | O Air | 2 | 2026-04-20 |
| OCN12 | O Air | 2 | 2026-05-16 |
| OCN11 | O Air | 2 | 2026-05-15 |
| OCN539 | O Air | 1 | 2026-05-29 |
| OCN52 | O Air | 1 | 2026-05-29 |
| OCN2103 | O Air | 1 | 2026-04-21 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | OCN539 | MSP → FRA | May 29, 21:15 UTC | May 30, 04:15 UTC | 7h 0m |
| 2026-05-29 | OCN52 | FRA → MSP | May 29, 10:10 UTC | May 29, 18:50 UTC | 8h 40m |
| 2026-05-27 | OCN51 | YHZ → FRA | May 27, 22:10 UTC | May 28, 05:30 UTC | 7h 20m |
| 2026-05-27 | OCN50 | FRA → PHL | May 27, 12:05 UTC | May 27, 20:10 UTC | 8h 5m |
| 2026-05-27 | OCN77 | YYC → FRA | May 27, 00:00 UTC | May 27, 08:30 UTC | 8h 30m |
| 2026-05-26 | OCN76 | FRA → YYC | May 26, 12:20 UTC | May 26, 21:40 UTC | 9h 20m |
| 2026-05-25 | OCN51 | YHZ → FRA | May 25, 21:54 UTC | May 26, 05:15 UTC | 7h 20m |
| 2026-05-25 | OCN50 | FRA → PHL | May 25, 11:45 UTC | May 25, 20:09 UTC | 8h 24m |
| 2026-05-24 | OCN75 | YHZ → FRA | May 24, 23:05 UTC | May 25, 05:10 UTC | 6h 5m |
| 2026-05-24 | OCN74 | FRA → YHZ | May 24, 14:15 UTC | May 24, 20:35 UTC | 6h 20m |
| 2026-05-24 | OCN69 | MCO → FRA | May 24, 01:25 UTC | May 24, 09:55 UTC | 8h 30m |
| 2026-05-23 | OCN68 | FRA → MCO | May 23, 12:40 UTC | May 23, 22:30 UTC | 9h 51m |
| 2026-05-22 | OCN659 | TPA → FRA | May 22, 22:05 UTC | May 23, 06:30 UTC | 8h 24m |
| 2026-05-22 | OCN642 | FRA → TPA | May 22, 10:10 UTC | May 22, 20:05 UTC | 9h 55m |
| 2026-05-21 | OCN75 | YHZ → FRA | May 21, 23:10 UTC | May 22, 04:50 UTC | 5h 40m |
| 2026-05-21 | OCN74 | FRA → YHZ | May 21, 14:25 UTC | May 21, 21:20 UTC | 6h 55m |
| 2026-05-21 | OCN77 | YYC → FRA | May 21, 00:05 UTC | May 21, 09:00 UTC | 8h 55m |
| 2026-05-20 | OCN76 | FRA → YYC | May 20, 12:00 UTC | May 20, 21:00 UTC | 9h 0m |
| 2026-05-20 | OCN69 | MCO → FRA | May 20, 00:20 UTC | May 20, 09:10 UTC | 8h 51m |
| 2026-05-19 | OCN68 | FRA → MCO | May 19, 12:10 UTC | May 19, 21:45 UTC | 9h 35m |
| 2026-05-18 | OCN133 | WDH → FRA | May 18, 01:30 UTC | May 18, 03:20 UTC | 1h 50m |
| 2026-05-17 | OCN133 | WDH → FRA | May 17, 04:20 UTC | May 18, 03:20 UTC | 23h 0m |
| 2026-05-17 | OCN132W | FRA → WDH | May 17, 02:20 UTC | May 18, 02:15 UTC | 23h 55m |
| 2026-05-16 | OCN132W | FRA → WDH | May 16, 20:25 UTC | May 17, 04:25 UTC | 8h 0m |
| 2026-05-16 | OCN12 | LAS → FRA | May 16, 04:25 UTC | May 16, 14:25 UTC | 10h 1m |
| 2026-05-15 | OCN11 | CUN → FRA | May 15, 12:10 UTC | May 15, 23:25 UTC | 11h 14m |
| 2026-05-14 | OCN12 | LAS → FRA | May 14, 04:30 UTC | May 14, 14:55 UTC | 10h 25m |
| 2026-05-13 | OCN11 | CUN → FRA | May 13, 12:10 UTC | May 13, 23:25 UTC | 11h 15m |
| 2026-05-12 | OCN135K | MBA → FRA | May 12, 14:00 UTC | May 12, 17:30 UTC | 3h 30m |
| 2026-05-11 | OCN135K | MBA → FRA | May 11, 20:20 UTC | May 12, 17:30 UTC | 21h 10m |
| 2026-05-11 | OCN135K | MBA → FRA | May 11, 18:50 UTC | May 12, 17:30 UTC | 22h 40m |
| 2026-05-11 | OCN69 | MCO → FRA | May 11, 00:54 UTC | May 11, 09:35 UTC | 8h 40m |
| 2026-05-10 | OCN68 | FRA → MCO | May 10, 12:00 UTC | May 10, 21:54 UTC | 9h 55m |
| 2026-05-06 | OCN133 | WDH → FRA | May 6, 01:20 UTC | May 6, 03:10 UTC | 1h 50m |
| 2026-05-04 | OCN132W | FRA → WDH | May 4, 20:15 UTC | May 4, 22:05 UTC | 1h 50m |
| 2026-05-03 | OCN133 | WDH → FRA | May 3, 18:55 UTC | May 4, 03:09 UTC | 8h 15m |
| 2026-05-02 | OCN132W | FRA → WDH | May 2, 20:20 UTC | May 3, 19:45 UTC | 23h 24m |
| 2026-05-01 | OCN133 | WDH → FRA | May 1, 18:50 UTC | May 2, 03:05 UTC | 8h 16m |
| 2026-04-30 | OCN132W | FRA → WDH | Apr 30, 20:20 UTC | May 1, 19:30 UTC | 23h 10m |
| 2026-04-30 | OCN132W | FRA → WDH | Apr 30, 20:10 UTC | Apr 30, 21:55 UTC | 1h 45m |
| 2026-04-24 | OCN659 | TPA → FRA | Apr 24, 22:05 UTC | Apr 25, 06:55 UTC | 8h 50m |
| 2026-04-24 | OCN642 | FRA → TPA | Apr 24, 09:55 UTC | Apr 24, 19:15 UTC | 9h 20m |
| 2026-04-23 | OCN659 | TPA → FRA | Apr 23, 22:00 UTC | Apr 24, 07:10 UTC | 9h 10m |
| 2026-04-23 | OCN642 | FRA → TPA | Apr 23, 10:01 UTC | Apr 23, 19:20 UTC | 9h 19m |
| 2026-04-21 | OCN75 | YHZ → FRA | Apr 21, 22:45 UTC | Apr 22, 05:05 UTC | 6h 20m |
| 2026-04-21 | OCN74 | FRA → YHZ | Apr 21, 13:55 UTC | Apr 21, 20:30 UTC | 6h 35m |
| 2026-04-21 | OCN2103 | BGI → FRA | Apr 21, 06:30 UTC | Apr 21, 08:45 UTC | 2h 15m |
| 2026-04-20 | OCN2102 | FRA → BGI | Apr 20, 21:00 UTC | Apr 20, 21:10 UTC | 10m |
| 2026-04-20 | OCN2102 | FRA → BGI | Apr 20, 11:55 UTC | Apr 20, 14:20 UTC | 2h 25m |
| 2026-04-19 | OCN659 | TPA → FRA | Apr 19, 22:20 UTC | Apr 20, 07:10 UTC | 8h 50m |
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 .