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
- 195
- Distinct callsigns
- 20
- Country
- FR
- Last broadcast
- Jul 26, 17:10 UTC
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 |
| AFR89U | Air France | 7 | 2026-07-25 |
| AFR501 | Air France | 7 | 2026-07-21 |
| AFR431 | Air France | 7 | 2026-07-26 |
| AFR284 | - | 7 | 2026-06-29 |
| AFR088 | Air France | 7 | 2026-07-24 |
| AFR902 | - | 6 | 2026-07-05 |
| AFR829 | - | 6 | 2026-07-13 |
| AFR500 | Air France | 6 | 2026-07-20 |
| AFR149 | Air France | 6 | 2026-07-19 |
| AFR935 | Air France | 5 | 2026-05-29 |
| AFR805 | - | 4 | 2026-07-04 |
| AFR804 | Air France | 4 | 2026-07-26 |
| AFR283 | - | 4 | 2026-06-29 |
| AFR59N | Air France | 3 | 2026-07-23 |
| AFR58P | Air France | 3 | 2026-07-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | AFR804 | CDG → COO | Jul 26, 14:55 UTC | Jul 26, 17:10 UTC | 2h 15m |
| 2026-07-26 | AFR431 | SJO → CDG | Jul 26, 01:20 UTC | Jul 26, 11:25 UTC | 10h 6m |
| 2026-07-25 | AFR430 | CDG → SJO | Jul 25, 12:05 UTC | Jul 25, 22:05 UTC | 10h 0m |
| 2026-07-25 | AFR89U | MSP → CDG | Jul 25, 01:45 UTC | Jul 25, 09:15 UTC | 7h 30m |
| 2026-07-24 | AFR088 | CDG → SFO | Jul 24, 14:40 UTC | Jul 24, 23:10 UTC | 8h 30m |
| 2026-07-24 | AFR89U | MSP → CDG | Jul 24, 01:25 UTC | Jul 24, 08:55 UTC | 7h 30m |
| 2026-07-23 | AFR088 | CDG → SFO | Jul 23, 14:05 UTC | Jul 23, 22:40 UTC | 8h 35m |
| 2026-07-23 | AFR59N | DEN → CDG | Jul 23, 01:15 UTC | Jul 23, 10:00 UTC | 8h 45m |
| 2026-07-22 | AFR58P | CDG → DEN | Jul 22, 12:30 UTC | Jul 22, 22:00 UTC | 9h 30m |
| 2026-07-22 | AFR347F | - | Jul 22, 02:15 UTC | Jul 22, 03:20 UTC | 1h 5m |
| 2026-07-21 | AFR346 | - | Jul 21, 15:20 UTC | Jul 21, 22:15 UTC | 6h 55m |
| 2026-07-21 | AFR501 | ABJ → ACC | Jul 21, 00:50 UTC | Jul 21, 11:25 UTC | 10h 35m |
| 2026-07-20 | AFR500 | ACC → ABJ | Jul 20, 08:30 UTC | Jul 20, 19:55 UTC | 11h 25m |
| 2026-07-19 | AFR149 | LOS → CDG | Jul 19, 14:40 UTC | Jul 20, 05:10 UTC | 14h 30m |
| 2026-07-19 | AFR359P | - | Jul 19, 03:40 UTC | Jul 19, 10:30 UTC | 6h 50m |
| 2026-07-18 | AFR358P | - | Jul 18, 17:10 UTC | Jul 19, 00:45 UTC | 7h 35m |
| 2026-07-18 | AFR431 | SJO → CDG | Jul 18, 02:05 UTC | Jul 18, 12:10 UTC | 10h 6m |
| 2026-07-17 | AFR430 | - | Jul 17, 12:19 UTC | Jul 17, 22:40 UTC | 10h 20m |
| 2026-07-17 | AFR89U | MSP → CDG | Jul 17, 01:15 UTC | Jul 17, 09:30 UTC | 8h 15m |
| 2026-07-16 | AFR088 | - | Jul 16, 14:45 UTC | Jul 16, 22:55 UTC | 8h 10m |
| 2026-07-16 | AFR89U | - | Jul 16, 01:20 UTC | Jul 16, 09:05 UTC | 7h 45m |
| 2026-07-15 | AFR088 | - | Jul 15, 14:20 UTC | Jul 15, 22:35 UTC | 8h 15m |
| 2026-07-15 | AFR35T | ATL → CDG | Jul 15, 02:45 UTC | Jul 15, 10:50 UTC | 8h 5m |
| 2026-07-14 | AFR34N | - | Jul 14, 14:45 UTC | Jul 14, 23:20 UTC | 8h 34m |
| 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 |
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 .