sensors Mode-S transponder
3949EF
ICAO 24-bit transponder address · allocated to France
Currently assigned to F-GSPP · BOEING 777-200
- Hex
- 3949EF
- Octal
- 16244757
- Decimal
- 3,754,479
- Country
- FR
- Tail
- F-GSPP
- Type
- B772
- Flights observed
- 172
- Distinct callsigns
- 20
- Country
- FR
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address 3949EF 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| AFR828 | - | 12 | 2026-07-12 |
| AFR186 | Air France | 12 | 2026-05-05 |
| AFR116 | Air France | 10 | 2026-05-24 |
| AFR187 | Air France | 9 | 2026-05-06 |
| AFR111 | Air France | 8 | 2026-05-24 |
| AFR284 | - | 7 | 2026-06-29 |
| AFR902 | - | 6 | 2026-07-05 |
| AFR829 | - | 6 | 2026-07-13 |
| AFR501 | - | 6 | 2026-07-14 |
| AFR935 | Air France | 5 | 2026-05-29 |
| AFR500 | - | 5 | 2026-07-13 |
| AFR431 | - | 5 | 2026-07-10 |
| AFR149 | Air France | 5 | 2026-06-03 |
| AFR805 | - | 4 | 2026-07-04 |
| AFR283 | - | 4 | 2026-06-29 |
| AFR89U | - | 3 | 2026-07-09 |
| AFR804 | - | 3 | 2026-07-10 |
| AFR465 | Air France | 3 | 2026-05-18 |
| AFR132 | - | 3 | 2026-07-11 |
| AFR088 | - | 3 | 2026-07-08 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | AFR34N | - | Jul 14, 14:45 UTC | Jul 14, 16:15 UTC | 1h 30m |
| 2026-07-14 | AFR501 | - | Jul 14, 00:45 UTC | Jul 14, 11:15 UTC | 10h 30m |
| 2026-07-13 | AFR500 | - | Jul 13, 08:40 UTC | Jul 13, 20:25 UTC | 11h 45m |
| 2026-07-13 | AFR829 | - | Jul 13, 00:25 UTC | Jul 13, 04:40 UTC | 4h 15m |
| 2026-07-12 | AFR828 | - | Jul 12, 17:30 UTC | Jul 12, 17:40 UTC | 10m |
| 2026-07-12 | AFR828 | - | Jul 12, 09:40 UTC | Jul 12, 12:35 UTC | 2h 55m |
| 2026-07-11 | AFR132 | - | Jul 11, 14:25 UTC | Jul 12, 05:25 UTC | 15h 0m |
| 2026-07-10 | AFR804 | - | Jul 10, 14:45 UTC | Jul 11, 05:35 UTC | 14h 50m |
| 2026-07-10 | AFR431 | - | Jul 10, 01:45 UTC | Jul 10, 11:35 UTC | 9h 50m |
| 2026-07-09 | AFR430 | - | Jul 9, 12:15 UTC | Jul 9, 22:40 UTC | 10h 25m |
| 2026-07-09 | AFR89U | - | Jul 9, 01:20 UTC | Jul 9, 08:55 UTC | 7h 35m |
| 2026-07-08 | AFR088 | - | Jul 8, 14:25 UTC | Jul 8, 22:40 UTC | 8h 15m |
| 2026-07-08 | AFR651 | - | Jul 8, 01:25 UTC | Jul 8, 10:45 UTC | 9h 20m |
| 2026-07-07 | AFR650 | CDG → CUN | Jul 7, 12:45 UTC | Jul 7, 22:35 UTC | 9h 50m |
| 2026-07-07 | AFR829 | - | Jul 7, 07:55 UTC | Jul 7, 09:30 UTC | 1h 35m |
| 2026-07-06 | AFR828 | - | Jul 6, 18:00 UTC | Jul 6, 18:10 UTC | 10m |
| 2026-07-06 | AFR828 | - | Jul 6, 10:15 UTC | Jul 6, 13:05 UTC | 2h 50m |
| 2026-07-05 | AFR902 | NSI → CDG | Jul 5, 21:50 UTC | Jul 6, 04:55 UTC | 7h 5m |
| 2026-07-05 | AFR902 | - | Jul 5, 19:35 UTC | Jul 5, 19:45 UTC | 10m |
| 2026-07-05 | AFR902 | - | Jul 5, 11:15 UTC | Jul 5, 13:20 UTC | 2h 5m |
| 2026-07-04 | AFR805 | - | Jul 4, 15:00 UTC | Jul 5, 05:40 UTC | 14h 40m |
| 2026-07-04 | AFR501 | - | Jul 4, 00:35 UTC | Jul 4, 11:15 UTC | 10h 40m |
| 2026-07-03 | AFR500 | - | Jul 3, 08:55 UTC | Jul 3, 20:45 UTC | 11h 50m |
| 2026-07-02 | AFR841 | - | Jul 2, 09:20 UTC | Jul 3, 03:40 UTC | 18h 20m |
| 2026-07-01 | AFR805 | - | Jul 1, 15:05 UTC | Jul 2, 05:45 UTC | 14h 40m |
| 2026-06-30 | AFR758 | - | Jun 30, 14:30 UTC | Jul 1, 09:10 UTC | 18h 40m |
| 2026-06-29 | AFR283 | DEL → CDG | Jun 29, 22:15 UTC | Jun 30, 06:30 UTC | 8h 16m |
| 2026-06-29 | AFR284 | - | Jun 29, 12:09 UTC | Jun 29, 19:49 UTC | 7h 40m |
| 2026-06-28 | AFR217 | - | Jun 28, 20:29 UTC | Jun 29, 05:20 UTC | 8h 50m |
| 2026-06-28 | AFR218 | - | Jun 28, 09:34 UTC | Jun 28, 18:05 UTC | 8h 30m |
| 2026-06-27 | AFR217 | - | Jun 27, 20:24 UTC | Jun 28, 05:20 UTC | 8h 55m |
| 2026-06-27 | AFR218 | - | Jun 27, 09:19 UTC | Jun 27, 17:34 UTC | 8h 15m |
| 2026-06-26 | AFR804 | - | Jun 26, 14:59 UTC | Jun 27, 05:49 UTC | 14h 50m |
| 2026-06-25 | AFR501 | - | Jun 25, 18:45 UTC | Jun 26, 11:05 UTC | 16h 20m |
| 2026-06-25 | AFR501 | - | Jun 25, 09:50 UTC | Jun 26, 09:45 UTC | 23h 55m |
| 2026-06-25 | AFR500 | - | Jun 25, 08:55 UTC | Jun 26, 00:55 UTC | 16h 0m |
| 2026-06-25 | AFR829 | - | Jun 25, 01:35 UTC | Jun 25, 04:40 UTC | 3h 5m |
| 2026-06-24 | AFR828 | - | Jun 24, 17:50 UTC | Jun 24, 17:59 UTC | 10m |
| 2026-06-24 | AFR828 | - | Jun 24, 10:04 UTC | Jun 24, 13:34 UTC | 3h 30m |
| 2026-06-23 | AFR719 | DSS → CDG | Jun 23, 23:29 UTC | Jun 24, 04:24 UTC | 4h 55m |
| 2026-06-23 | AFR718 | CDG → DSS | Jun 23, 15:40 UTC | Jun 23, 20:49 UTC | 5h 10m |
| 2026-06-22 | AFR431 | - | Jun 22, 20:55 UTC | Jun 23, 11:29 UTC | 14h 35m |
| 2026-06-22 | AFR431 | - | Jun 22, 12:34 UTC | Jun 23, 11:29 UTC | 22h 55m |
| 2026-06-22 | AFR59N | - | Jun 22, 00:34 UTC | Jun 22, 09:19 UTC | 8h 45m |
| 2026-06-21 | AFR58P | - | Jun 21, 12:14 UTC | Jun 21, 22:00 UTC | 9h 45m |
| 2026-06-21 | AFR377 | - | Jun 21, 01:19 UTC | Jun 21, 08:25 UTC | 7h 5m |
| 2026-06-20 | AFR378E | - | Jun 20, 14:14 UTC | Jun 20, 22:05 UTC | 7h 50m |
| 2026-06-20 | AFR377 | - | Jun 20, 01:09 UTC | Jun 20, 08:19 UTC | 7h 10m |
| 2026-06-19 | AFR378E | - | Jun 19, 14:09 UTC | Jun 19, 22:04 UTC | 7h 55m |
| 2026-06-14 | AFR431 | - | Jun 14, 22:05 UTC | Jun 15, 11:10 UTC | 13h 4m |
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-GSPP page for operator, model, and routing details .