sensors Mode-S transponder
390E37
ICAO 24-bit transponder address · allocated to France
Currently assigned to F-GDRX · CESSNA 172 Skyhawk
- Hex
- 390E37
- Octal
- 16207067
- Decimal
- 3,739,191
- Country
- FR
- Tail
- F-GDRX
- Type
- C172
- Flights observed
- 25
- Distinct callsigns
- 1
- Country
- FR
- Last broadcast
- 5d ago
Last known position
Country allocation
The ICAO 24-bit address 390E37 falls within the block assigned to France (FR) by ICAO Annex 10, Volume III. Every aircraft registered in France 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| FGDRX | - | 25 | 2026-06-30 |
Recent flights last 25
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-30 | FGDRX | - | Jun 30, 07:25 UTC | Jun 30, 07:55 UTC | 30m |
| 2026-06-26 | FGDRX | - | Jun 26, 15:20 UTC | Jun 26, 16:09 UTC | 50m |
| 2026-06-26 | FGDRX | - | Jun 26, 08:00 UTC | Jun 26, 08:20 UTC | 20m |
| 2026-06-19 | FGDRX | - | Jun 19, 17:34 UTC | Jun 19, 17:49 UTC | 15m |
| 2026-06-18 | FGDRX | - | Jun 18, 15:20 UTC | Jun 18, 16:40 UTC | 1h 20m |
| 2026-06-18 | FGDRX | - | Jun 18, 08:25 UTC | Jun 18, 09:10 UTC | 45m |
| 2026-06-15 | FGDRX | - | Jun 15, 07:40 UTC | Jun 15, 08:10 UTC | 30m |
| 2026-06-13 | FGDRX | LRH → LRH | Jun 13, 09:40 UTC | Jun 13, 10:15 UTC | 35m |
| 2026-06-13 | FGDRX | - | Jun 13, 08:35 UTC | Jun 13, 09:05 UTC | 30m |
| 2026-06-13 | FGDRX | LRH → LRH | Jun 13, 07:05 UTC | Jun 13, 07:55 UTC | 50m |
| 2026-06-12 | FGDRX | LRH → LRH | Jun 12, 14:10 UTC | Jun 12, 14:45 UTC | 35m |
| 2026-05-29 | FGDRX | - | May 29, 13:30 UTC | May 29, 13:40 UTC | 10m |
| 2026-05-29 | FGDRX | - | May 29, 09:05 UTC | May 29, 09:20 UTC | 15m |
| 2026-05-27 | FGDRX | - | May 27, 12:55 UTC | May 27, 15:35 UTC | 2h 40m |
| 2026-05-27 | FGDRX | - | May 27, 11:35 UTC | May 27, 12:05 UTC | 30m |
| 2026-05-27 | FGDRX | - | May 27, 08:25 UTC | May 27, 09:00 UTC | 35m |
| 2026-05-27 | FGDRX | - | May 27, 06:44 UTC | May 27, 07:45 UTC | 1h 0m |
| 2026-05-26 | FGDRX | - | May 26, 15:35 UTC | May 26, 15:49 UTC | 15m |
| 2026-05-26 | FGDRX | - | May 26, 08:30 UTC | May 26, 08:50 UTC | 20m |
| 2026-05-25 | FGDRX | - | May 25, 08:30 UTC | May 25, 09:05 UTC | 35m |
| 2026-05-21 | FGDRX | - | May 21, 08:50 UTC | May 21, 09:10 UTC | 20m |
| 2026-04-26 | FGDRX | - | Apr 26, 15:40 UTC | Apr 26, 16:10 UTC | 30m |
| 2026-04-26 | FGDRX | - | Apr 26, 09:35 UTC | Apr 26, 10:05 UTC | 30m |
| 2026-04-21 | FGDRX | - | Apr 21, 10:50 UTC | Apr 21, 11:10 UTC | 20m |
| 2026-04-21 | FGDRX | - | Apr 21, 09:10 UTC | Apr 21, 10:00 UTC | 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 F-GDRX page for operator, model, and routing details .