sensors Mode-S transponder
3F7DC1
ICAO 24-bit transponder address · allocated to Germany
Currently assigned to 15+01 · AIRBUS A-319
- Hex
- 3F7DC1
- Octal
- 17676701
- Decimal
- 4,160,961
- Country
- DE
- Tail
- 15+01
- Type
- A319
- Flights observed
- 77
- Distinct callsigns
- 19
- Country
- DE
- Last broadcast
- 13h ago
Last known position
Country allocation
The ICAO 24-bit address 3F7DC1 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 |
|---|---|---|---|
| GAF821 | - | 15 | 2026-06-30 |
| GAF818 | - | 7 | 2026-07-06 |
| GAF851 | - | 6 | 2026-05-06 |
| GAF830 | - | 6 | 2026-07-16 |
| GAF811 | - | 6 | 2026-07-14 |
| GAF840 | - | 5 | 2026-05-01 |
| GAF861 | - | 4 | 2026-05-18 |
| GAF813 | - | 4 | 2026-05-29 |
| GAF608 | - | 4 | 2026-07-08 |
| GAF834 | - | 3 | 2026-06-27 |
| GAF833 | - | 3 | 2026-07-02 |
| GAF893 | - | 2 | 2026-06-01 |
| GAF868 | - | 2 | 2026-05-05 |
| GAF850 | - | 2 | 2026-05-07 |
| GAF848 | - | 2 | 2026-07-14 |
| GAF824 | - | 2 | 2026-06-25 |
| GAF769 | - | 2 | 2026-06-05 |
| GAF860 | - | 1 | 2026-07-17 |
| GAF854 | - | 1 | 2026-05-12 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | GAF860 | - | Jul 17, 10:40 UTC | Jul 17, 12:55 UTC | 2h 15m |
| 2026-07-16 | GAF830 | BER → CGN | Jul 16, 14:40 UTC | Jul 16, 15:30 UTC | 50m |
| 2026-07-16 | GAF830 | CGN → BER | Jul 16, 11:40 UTC | Jul 16, 12:25 UTC | 45m |
| 2026-07-14 | GAF848 | BER → CGN | Jul 14, 21:25 UTC | Jul 14, 22:20 UTC | 55m |
| 2026-07-14 | GAF848 | CGN → BER | Jul 14, 19:30 UTC | Jul 14, 20:15 UTC | 45m |
| 2026-07-14 | GAF811 | - | Jul 14, 13:55 UTC | Jul 14, 14:40 UTC | 45m |
| 2026-07-13 | GAF811 | CGN → LBG | Jul 13, 12:45 UTC | Jul 13, 13:50 UTC | 1h 5m |
| 2026-07-08 | GAF608 | - | Jul 8, 16:35 UTC | Jul 8, 19:40 UTC | 3h 5m |
| 2026-07-07 | GAF608 | - | Jul 7, 11:55 UTC | Jul 7, 13:05 UTC | 1h 10m |
| 2026-07-07 | GAF608 | BER → TLV | Jul 7, 04:00 UTC | Jul 7, 07:40 UTC | 3h 40m |
| 2026-07-06 | GAF608 | CGN → BER | Jul 6, 10:55 UTC | Jul 6, 11:45 UTC | 50m |
| 2026-07-06 | GAF818 | BER → CGN | Jul 6, 06:40 UTC | Jul 6, 07:25 UTC | 45m |
| 2026-07-05 | GAF818 | JFK → BER | Jul 5, 05:10 UTC | Jul 5, 12:10 UTC | 7h 0m |
| 2026-07-03 | GAF818 | - | Jul 3, 15:40 UTC | Jul 3, 23:30 UTC | 7h 50m |
| 2026-07-03 | GAF818 | CGN → MAD | Jul 3, 11:35 UTC | Jul 3, 13:30 UTC | 1h 55m |
| 2026-07-02 | GAF833 | - | Jul 2, 12:20 UTC | Jul 2, 13:10 UTC | 50m |
| 2026-07-02 | GAF833 | - | Jul 2, 06:55 UTC | Jul 2, 08:10 UTC | 1h 15m |
| 2026-07-02 | GAF833 | CGN → STN | Jul 2, 04:40 UTC | Jul 2, 05:35 UTC | 55m |
| 2026-06-30 | GAF821 | BER → CGN | Jun 30, 17:10 UTC | Jun 30, 18:00 UTC | 50m |
| 2026-06-30 | GAF821 | - | Jun 30, 12:00 UTC | Jun 30, 16:15 UTC | 4h 15m |
| 2026-06-28 | GAF821 | - | Jun 28, 15:20 UTC | Jun 28, 19:34 UTC | 4h 15m |
| 2026-06-28 | GAF821 | CGN → BRU | Jun 28, 13:04 UTC | Jun 28, 13:29 UTC | 25m |
| 2026-06-27 | GAF834 | - | Jun 27, 06:59 UTC | Jun 27, 07:49 UTC | 50m |
| 2026-06-27 | GAF834 | - | Jun 27, 05:19 UTC | Jun 27, 06:19 UTC | 1h 0m |
| 2026-06-27 | GAF834 | - | Jun 27, 01:35 UTC | Jun 27, 03:09 UTC | 1h 35m |
| 2026-06-25 | GAF818 | RZE → CGN | Jun 25, 18:15 UTC | Jun 25, 19:49 UTC | 1h 35m |
| 2026-06-25 | GAF818 | - | Jun 25, 16:09 UTC | Jun 25, 17:14 UTC | 1h 5m |
| 2026-06-25 | GAF818 | - | Jun 25, 13:09 UTC | Jun 25, 13:59 UTC | 50m |
| 2026-06-25 | GAF824 | - | Jun 25, 06:25 UTC | Jun 25, 07:30 UTC | 1h 5m |
| 2026-06-25 | GAF824 | CGN → BER | Jun 25, 03:40 UTC | Jun 25, 04:29 UTC | 50m |
| 2026-06-05 | GAF769 | - | Jun 5, 13:35 UTC | Jun 5, 16:30 UTC | 2h 55m |
| 2026-06-05 | GAF769 | CGN → KEF | Jun 5, 08:40 UTC | Jun 5, 11:45 UTC | 3h 5m |
| 2026-06-01 | GAF893 | MUC → CGN | Jun 1, 12:15 UTC | Jun 1, 13:00 UTC | 45m |
| 2026-06-01 | GAF893 | CGN → MUC | Jun 1, 10:10 UTC | Jun 1, 10:50 UTC | 40m |
| 2026-05-29 | GAF813 | - | May 29, 00:00 UTC | May 29, 07:25 UTC | 7h 25m |
| 2026-05-26 | GAF813 | - | May 26, 20:20 UTC | May 27, 03:04 UTC | 6h 45m |
| 2026-05-26 | GAF813 | BER → GLA | May 26, 16:59 UTC | May 26, 18:50 UTC | 1h 50m |
| 2026-05-25 | GAF813 | CGN → BER | May 25, 13:10 UTC | May 25, 14:00 UTC | 50m |
| 2026-05-18 | GAF861 | - | May 18, 16:25 UTC | May 18, 18:25 UTC | 2h 0m |
| 2026-05-17 | GAF861 | - | May 17, 12:35 UTC | May 17, 13:05 UTC | 30m |
| 2026-05-16 | GAF861 | - | May 16, 15:10 UTC | May 16, 15:45 UTC | 35m |
| 2026-05-15 | GAF861 | - | May 15, 07:45 UTC | May 15, 11:45 UTC | 4h 0m |
| 2026-05-13 | GAF821 | BER → CGN | May 13, 06:40 UTC | May 13, 07:30 UTC | 50m |
| 2026-05-13 | GAF821 | - | May 13, 04:35 UTC | May 13, 05:40 UTC | 1h 5m |
| 2026-05-13 | GAF821 | - | May 13, 02:20 UTC | May 13, 03:50 UTC | 1h 30m |
| 2026-05-12 | GAF854 | CGN → CGN | May 12, 08:45 UTC | May 12, 16:15 UTC | 7h 30m |
| 2026-05-10 | GAF821 | - | May 10, 17:49 UTC | May 10, 19:30 UTC | 1h 40m |
| 2026-05-10 | GAF821 | - | May 10, 15:55 UTC | May 10, 16:44 UTC | 50m |
| 2026-05-10 | GAF821 | CGN → BER | May 10, 13:25 UTC | May 10, 14:14 UTC | 50m |
| 2026-05-07 | GAF850 | - | May 7, 13:00 UTC | May 7, 13:35 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+01 page for operator, model, and routing details .