sensors Mode-S transponder
3949EC
ICAO 24-bit transponder address · allocated to France
Currently assigned to F-GSPM · BOEING 777-200
- Hex
- 3949EC
- Octal
- 16244754
- Decimal
- 3,754,476
- Country
- FR
- Tail
- F-GSPM
- Type
- B772
- Flights observed
- 82
- Distinct callsigns
- 20
- Country
- FR
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address 3949EC 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 |
|---|---|---|---|
| AFR837 | Air France | 10 | 2026-05-09 |
| AFR935 | Air France | 7 | 2026-05-24 |
| AFR284 | Air France | 4 | 2026-05-27 |
| AFR283 | Air France | 4 | 2026-05-27 |
| AFR149 | Air France | 4 | 2026-05-25 |
| AFR940 | Air France | 3 | 2026-05-23 |
| AFR217 | Air France | 3 | 2026-05-13 |
| AFR111 | Air France | 3 | 2026-04-22 |
| AFR934 | Air France | 2 | 2026-04-17 |
| AFR926 | Air France | 2 | 2026-05-23 |
| AFR923 | Air France | 2 | 2026-05-24 |
| AFR828 | Air France | 2 | 2026-05-19 |
| AFR357E | Air France | 2 | 2026-05-05 |
| AFR218 | Air France | 2 | 2026-04-26 |
| AFR187 | Air France | 2 | 2026-05-07 |
| AFR186 | Air France | 2 | 2026-05-06 |
| AFR132 | - | 2 | 2026-04-16 |
| AFR116 | Air France | 2 | 2026-04-21 |
| AFR89U | Air France | 1 | 2026-05-18 |
| AFR860 | Air France | 1 | 2026-05-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | AFR377 | DTW → CDG | May 30, 01:20 UTC | May 30, 08:25 UTC | 7h 5m |
| 2026-05-29 | AFR378E | CDG → DTW | May 29, 15:25 UTC | May 29, 23:05 UTC | 7h 41m |
| 2026-05-29 | AFR11E | JFK → CDG | May 29, 05:30 UTC | May 29, 12:00 UTC | 6h 30m |
| 2026-05-28 | AFR012 | CDG → JFK | May 28, 18:50 UTC | May 29, 02:05 UTC | 7h 15m |
| 2026-05-27 | AFR283 | CDG → NRT | May 27, 19:55 UTC | May 28, 04:20 UTC | 8h 25m |
| 2026-05-27 | AFR284 | NRT → CDG | May 27, 09:40 UTC | May 27, 17:10 UTC | 7h 30m |
| 2026-05-26 | AFR860 | CDG → LFW | May 26, 14:45 UTC | May 27, 06:09 UTC | 15h 25m |
| 2026-05-25 | AFR149 | LOS → CDG | May 25, 14:45 UTC | May 26, 06:14 UTC | 15h 30m |
| 2026-05-24 | AFR935 | TNR → CDG | May 24, 11:05 UTC | May 25, 08:40 UTC | 21h 35m |
| 2026-05-24 | AFR935 | TNR → CDG | May 24, 09:10 UTC | May 25, 08:40 UTC | 23h 30m |
| 2026-05-24 | AFR923 | LBV → CDG | May 24, 01:05 UTC | May 24, 03:30 UTC | 2h 25m |
| 2026-05-23 | AFR926 | CDG → LBV | May 23, 09:25 UTC | May 23, 10:55 UTC | 1h 30m |
| 2026-05-23 | AFR940 | CDG → COO | May 23, 01:15 UTC | May 23, 06:20 UTC | 5h 4m |
| 2026-05-22 | AFR940 | CDG → COO | May 22, 09:10 UTC | May 23, 06:20 UTC | 21h 9m |
| 2026-05-22 | AFR923 | LBV → CDG | May 22, 00:50 UTC | May 22, 03:20 UTC | 2h 30m |
| 2026-05-21 | AFR926 | CDG → LBV | May 21, 09:10 UTC | May 21, 15:50 UTC | 6h 40m |
| 2026-05-20 | AFR283 | CDG → NRT | May 20, 20:30 UTC | May 21, 04:45 UTC | 8h 15m |
| 2026-05-20 | AFR284 | NRT → CDG | May 20, 10:20 UTC | May 20, 18:15 UTC | 7h 55m |
| 2026-05-20 | AFR829 | COF → COF | May 20, 01:35 UTC | May 20, 04:55 UTC | 3h 21m |
| 2026-05-19 | AFR828 | CDG → NBO | May 19, 17:15 UTC | May 19, 17:25 UTC | 10m |
| 2026-05-19 | AFR828 | CDG → NBO | May 19, 09:30 UTC | May 19, 12:55 UTC | 3h 25m |
| 2026-05-18 | AFR805 | COO → CDG | May 18, 15:05 UTC | May 19, 05:55 UTC | 14h 49m |
| 2026-05-18 | AFR89U | MSP → CDG | May 18, 01:45 UTC | May 18, 09:20 UTC | 7h 35m |
| 2026-05-17 | AFR088 | CDG → SFO | May 17, 14:20 UTC | May 17, 22:55 UTC | 8h 35m |
| 2026-05-16 | AFR59N | DEN → CDG | May 16, 00:30 UTC | May 16, 09:01 UTC | 8h 31m |
| 2026-05-15 | AFR58P | CDG → DEN | May 15, 11:50 UTC | May 15, 21:30 UTC | 9h 39m |
| 2026-05-13 | AFR217 | BOM → CDG | May 13, 11:05 UTC | May 14, 06:40 UTC | 19h 35m |
| 2026-05-13 | AFR217 | BOM → CDG | May 13, 09:10 UTC | May 14, 06:40 UTC | 21h 30m |
| 2026-05-12 | AFR719 | DSS → CDG | May 12, 23:25 UTC | May 13, 04:15 UTC | 4h 50m |
| 2026-05-12 | AFR718 | CDG → DSS | May 12, 15:20 UTC | May 12, 20:45 UTC | 5h 25m |
| 2026-05-11 | AFR283 | CDG → NRT | May 11, 19:55 UTC | May 12, 04:20 UTC | 8h 25m |
| 2026-05-11 | AFR284 | NRT → CDG | May 11, 09:25 UTC | May 11, 17:00 UTC | 7h 35m |
| 2026-05-10 | AFR940 | CDG → COO | May 10, 09:10 UTC | May 11, 04:55 UTC | 19h 45m |
| 2026-05-09 | AFR837 | DLA → CDG | May 9, 09:20 UTC | May 10, 03:30 UTC | 18h 10m |
| 2026-05-09 | AFR837 | DLA → CDG | May 9, 08:00 UTC | May 10, 03:30 UTC | 19h 30m |
| 2026-05-08 | AFR837 | DLA → CDG | May 8, 09:04 UTC | May 9, 03:50 UTC | 18h 45m |
| 2026-05-08 | AFR837 | DLA → CDG | May 8, 08:05 UTC | May 9, 03:50 UTC | 19h 45m |
| 2026-05-07 | AFR187 | CDG → LAS | May 7, 00:10 UTC | May 7, 14:25 UTC | 14h 15m |
| 2026-05-06 | AFR186 | LAS → CDG | May 6, 08:01 UTC | May 6, 20:40 UTC | 12h 39m |
| 2026-05-05 | AFR357E | YYZ → CDG | May 5, 23:30 UTC | May 6, 04:55 UTC | 5h 24m |
| 2026-05-05 | AFR357E | YYZ → CDG | May 5, 22:10 UTC | May 5, 23:25 UTC | 1h 15m |
| 2026-05-05 | AFR356G | CDG → YYZ | May 5, 12:05 UTC | May 5, 19:35 UTC | 7h 30m |
| 2026-05-04 | AFR804 | CDG → COO | May 4, 14:50 UTC | May 5, 07:25 UTC | 16h 36m |
| 2026-05-03 | AFR837 | DLA → CDG | May 3, 09:05 UTC | May 4, 03:40 UTC | 18h 35m |
| 2026-05-03 | AFR837 | DLA → CDG | May 3, 08:05 UTC | May 4, 03:40 UTC | 19h 35m |
| 2026-05-02 | AFR837 | DLA → CDG | May 2, 09:05 UTC | May 3, 03:35 UTC | 18h 29m |
| 2026-05-02 | AFR837 | DLA → CDG | May 2, 08:00 UTC | May 3, 03:35 UTC | 19h 34m |
| 2026-05-01 | AFR837 | DLA → CDG | May 1, 09:05 UTC | May 2, 03:25 UTC | 18h 20m |
| 2026-05-01 | AFR837 | DLA → CDG | May 1, 08:25 UTC | May 2, 03:25 UTC | 19h 0m |
| 2026-04-29 | AFR283 | CDG → NRT | Apr 29, 20:00 UTC | Apr 30, 04:25 UTC | 8h 24m |
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-GSPM page for operator, model, and routing details .