sensors Mode-S transponder
3F97FD
ICAO 24-bit transponder address · allocated to Germany
Currently assigned to 15+04 · AIRBUS A-321
- Hex
- 3F97FD
- Octal
- 17713775
- Decimal
- 4,167,677
- Country
- DE
- Tail
- 15+04
- Type
- A321
- Flights observed
- 49
- Distinct callsigns
- 16
- Country
- DE
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 3F97FD 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 16 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| GAF890 | - | 7 | 2026-07-01 |
| GAF891 | - | 6 | 2026-06-03 |
| GAF898 | - | 4 | 2026-07-06 |
| GAF893 | - | 4 | 2026-05-04 |
| GAF888 | - | 4 | 2026-04-24 |
| GAF746 | - | 4 | 2026-07-12 |
| GAF892 | - | 3 | 2026-07-07 |
| GAF879 | - | 3 | 2026-07-13 |
| GAF813 | - | 3 | 2026-07-01 |
| GAF894 | - | 2 | 2026-04-21 |
| GAF866 | - | 2 | 2026-06-11 |
| GAF861 | - | 2 | 2026-06-09 |
| GAF853 | - | 2 | 2026-06-23 |
| GAF896 | - | 1 | 2026-06-01 |
| GAF850 | - | 1 | 2026-05-26 |
| GAF781 | - | 1 | 2026-06-10 |
Recent flights last 49
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | GAF879 | - | Jul 13, 08:45 UTC | Jul 13, 09:30 UTC | 45m |
| 2026-07-13 | GAF879 | - | Jul 13, 06:05 UTC | Jul 13, 07:35 UTC | 1h 30m |
| 2026-07-13 | GAF879 | CGN → BER | Jul 13, 04:10 UTC | Jul 13, 04:50 UTC | 40m |
| 2026-07-12 | GAF746 | BRU → CGN | Jul 12, 11:01 UTC | Jul 12, 11:30 UTC | 30m |
| 2026-07-11 | GAF746 | - | Jul 11, 17:10 UTC | Jul 11, 17:45 UTC | 35m |
| 2026-07-11 | GAF746 | BRU → STN | Jul 11, 04:25 UTC | Jul 11, 05:10 UTC | 45m |
| 2026-07-10 | GAF746 | - | Jul 10, 11:35 UTC | Jul 10, 12:10 UTC | 35m |
| 2026-07-07 | GAF892 | BOD → CGN | Jul 7, 15:40 UTC | Jul 7, 17:00 UTC | 1h 20m |
| 2026-07-07 | GAF892 | CGN → BOD | Jul 7, 07:20 UTC | Jul 7, 09:30 UTC | 2h 10m |
| 2026-07-06 | GAF898 | BER → CGN | Jul 6, 14:00 UTC | Jul 6, 14:50 UTC | 50m |
| 2026-07-06 | GAF898 | CGN → BER | Jul 6, 05:45 UTC | Jul 6, 06:35 UTC | 50m |
| 2026-07-03 | GAF892 | CGN → CGN | Jul 3, 07:10 UTC | Jul 3, 09:30 UTC | 2h 20m |
| 2026-07-01 | GAF813 | - | Jul 1, 21:00 UTC | Jul 1, 22:45 UTC | 1h 45m |
| 2026-07-01 | GAF813 | BER → RZE | Jul 1, 16:15 UTC | Jul 1, 18:15 UTC | 2h 0m |
| 2026-07-01 | GAF813 | CGN → BER | Jul 1, 14:10 UTC | Jul 1, 15:00 UTC | 50m |
| 2026-07-01 | GAF890 | CGN → CGN | Jul 1, 07:40 UTC | Jul 1, 11:20 UTC | 3h 40m |
| 2026-06-24 | GAF890 | MUC → CGN | Jun 24, 07:50 UTC | Jun 24, 08:35 UTC | 45m |
| 2026-06-24 | GAF890 | CGN → MUC | Jun 24, 05:54 UTC | Jun 24, 06:39 UTC | 45m |
| 2026-06-23 | GAF853 | HAM → CGN | Jun 23, 08:54 UTC | Jun 23, 09:40 UTC | 45m |
| 2026-06-23 | GAF853 | CGN → HAM | Jun 23, 07:15 UTC | Jun 23, 08:00 UTC | 45m |
| 2026-06-12 | GAF890 | CGN → CGN | Jun 12, 08:20 UTC | Jun 12, 11:25 UTC | 3h 5m |
| 2026-06-11 | GAF866 | - | Jun 11, 14:50 UTC | Jun 11, 16:35 UTC | 1h 45m |
| 2026-06-11 | GAF866 | CGN → BUD | Jun 11, 11:35 UTC | Jun 11, 13:30 UTC | 1h 55m |
| 2026-06-10 | GAF781 | CGN → CGN | Jun 10, 07:45 UTC | Jun 10, 11:15 UTC | 3h 30m |
| 2026-06-09 | GAF861 | - | Jun 9, 16:45 UTC | Jun 9, 17:25 UTC | 40m |
| 2026-06-09 | GAF861 | - | Jun 9, 15:30 UTC | Jun 9, 15:50 UTC | 20m |
| 2026-06-08 | GAF890 | - | Jun 8, 10:00 UTC | Jun 8, 13:30 UTC | 3h 30m |
| 2026-06-08 | GAF890 | - | Jun 8, 08:25 UTC | Jun 8, 09:50 UTC | 1h 25m |
| 2026-06-03 | GAF891 | CGN → CGN | Jun 3, 09:05 UTC | Jun 3, 10:25 UTC | 1h 20m |
| 2026-06-01 | GAF896 | CGN → CGN | Jun 1, 15:00 UTC | Jun 1, 16:20 UTC | 1h 20m |
| 2026-05-26 | GAF850 | CGN → CGN | May 26, 08:45 UTC | May 26, 12:54 UTC | 4h 10m |
| 2026-05-04 | GAF893 | CGN → CGN | May 4, 09:00 UTC | May 4, 10:10 UTC | 1h 10m |
| 2026-04-30 | GAF890 | CGN → CGN | Apr 30, 10:10 UTC | Apr 30, 11:25 UTC | 1h 15m |
| 2026-04-24 | GAF888 | BER → CGN | Apr 24, 19:20 UTC | Apr 24, 20:05 UTC | 45m |
| 2026-04-24 | GAF888 | - | Apr 24, 14:45 UTC | Apr 24, 18:20 UTC | 3h 35m |
| 2026-04-23 | GAF888 | - | Apr 23, 11:05 UTC | Apr 23, 14:30 UTC | 3h 25m |
| 2026-04-23 | GAF888 | CGN → BER | Apr 23, 08:30 UTC | Apr 23, 09:20 UTC | 50m |
| 2026-04-21 | GAF894 | - | Apr 21, 11:05 UTC | Apr 21, 13:40 UTC | 2h 35m |
| 2026-04-21 | GAF894 | - | Apr 21, 07:25 UTC | Apr 21, 09:30 UTC | 2h 5m |
| 2026-04-20 | GAF898 | - | Apr 20, 12:00 UTC | Apr 20, 15:05 UTC | 3h 5m |
| 2026-04-20 | GAF898 | - | Apr 20, 07:20 UTC | Apr 20, 09:55 UTC | 2h 35m |
| 2026-04-14 | GAF893 | - | Apr 14, 12:50 UTC | Apr 14, 13:45 UTC | 55m |
| 2026-04-14 | GAF893 | - | Apr 14, 10:50 UTC | Apr 14, 12:45 UTC | 1h 55m |
| 2026-04-14 | GAF893 | - | Apr 14, 09:20 UTC | Apr 14, 11:05 UTC | 1h 45m |
| 2026-04-13 | GAF891 | - | Apr 13, 12:20 UTC | Apr 13, 12:55 UTC | 35m |
| 2026-04-13 | GAF891 | - | Apr 13, 11:55 UTC | Apr 13, 12:55 UTC | 1h 0m |
| 2026-04-13 | GAF891 | - | Apr 13, 08:20 UTC | Apr 13, 12:15 UTC | 3h 55m |
| 2026-04-13 | GAF891 | - | Apr 13, 07:55 UTC | Apr 13, 11:50 UTC | 3h 55m |
| 2026-04-13 | GAF891 | - | Apr 13, 07:40 UTC | Apr 13, 08:15 UTC | 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 15+04 page for operator, model, and routing details .