sensors Mode-S transponder
394A18
ICAO 24-bit transponder address · allocated to France
Currently assigned to F-GSQY · BOEING 777-300ER
- Hex
- 394A18
- Octal
- 16245030
- Decimal
- 3,754,520
- Country
- FR
- Tail
- F-GSQY
- Type
- B77W
- Flights observed
- 81
- Distinct callsigns
- 20
- Country
- FR
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 394A18 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 |
|---|---|---|---|
| AFR8U | Air France | 7 | 2026-05-04 |
| AFR2N | Air France | 6 | 2026-05-19 |
| AFR24X | Air France | 6 | 2026-05-28 |
| AFR256 | Air France | 5 | 2026-05-29 |
| AFR23G | Air France | 5 | 2026-05-20 |
| AFR22J | Air France | 5 | 2026-05-20 |
| AFR1U | Air France | 5 | 2026-05-19 |
| AFR025 | Air France | 5 | 2026-05-29 |
| AFR007 | - | 5 | 2026-05-05 |
| AFR279 | Air France | 4 | 2026-05-06 |
| AFR274 | Air France | 4 | 2026-05-05 |
| AFR257 | Air France | 4 | 2026-05-24 |
| AFR091 | Air France | 4 | 2026-05-26 |
| AFR090 | Air France | 4 | 2026-05-25 |
| AFR5U | Air France | 3 | 2026-05-27 |
| AFR006 | - | 3 | 2026-05-27 |
| AFR004 | - | 2 | 2026-04-26 |
| AFR003 | - | 2 | 2026-04-26 |
| AFR021 | Air France | 1 | 2026-05-07 |
| AFR020 | Air France | 1 | 2026-05-07 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | AFR256 | CDG → SIN | May 29, 21:55 UTC | May 30, 00:35 UTC | 2h 40m |
| 2026-05-29 | AFR025 | LAX → CDG | May 29, 01:45 UTC | May 29, 12:10 UTC | 10h 25m |
| 2026-05-28 | AFR24X | CDG → LAX | May 28, 11:55 UTC | May 28, 22:55 UTC | 11h 0m |
| 2026-05-27 | AFR5U | JFK → CDG | May 27, 23:30 UTC | May 28, 06:10 UTC | 6h 40m |
| 2026-05-27 | AFR006 | - | May 27, 12:05 UTC | May 27, 19:15 UTC | 7h 10m |
| 2026-05-26 | AFR091 | MIA → CDG | May 26, 00:24 UTC | May 26, 08:45 UTC | 8h 20m |
| 2026-05-25 | AFR090 | CDG → MIA | May 25, 12:20 UTC | May 25, 21:15 UTC | 8h 54m |
| 2026-05-24 | AFR257 | SIN → CDG | May 24, 14:45 UTC | May 25, 03:50 UTC | 13h 5m |
| 2026-05-23 | AFR256 | CDG → SIN | May 23, 21:45 UTC | May 24, 10:15 UTC | 12h 30m |
| 2026-05-23 | AFR091 | MIA → CDG | May 23, 01:05 UTC | May 23, 08:55 UTC | 7h 50m |
| 2026-05-22 | AFR090 | CDG → MIA | May 22, 13:05 UTC | May 22, 22:15 UTC | 9h 10m |
| 2026-05-22 | AFR091 | MIA → CDG | May 22, 00:25 UTC | May 22, 08:10 UTC | 7h 45m |
| 2026-05-21 | AFR090 | CDG → MIA | May 21, 12:20 UTC | May 21, 21:30 UTC | 9h 10m |
| 2026-05-20 | AFR23G | LAX → CDG | May 20, 22:35 UTC | May 21, 08:15 UTC | 9h 40m |
| 2026-05-20 | AFR22J | CDG → LAX | May 20, 08:40 UTC | May 20, 19:25 UTC | 10h 45m |
| 2026-05-19 | AFR1U | JFK → CDG | May 19, 22:15 UTC | May 20, 04:50 UTC | 6h 36m |
| 2026-05-19 | AFR2N | CDG → JFK | May 19, 06:55 UTC | May 19, 14:10 UTC | 7h 15m |
| 2026-05-18 | AFR257 | SIN → CDG | May 18, 15:05 UTC | May 19, 03:40 UTC | 12h 34m |
| 2026-05-17 | AFR256 | CDG → SIN | May 17, 21:45 UTC | May 18, 10:15 UTC | 12h 30m |
| 2026-05-16 | AFR23G | LAX → CDG | May 16, 22:20 UTC | May 17, 08:10 UTC | 9h 50m |
| 2026-05-16 | AFR22J | CDG → LAX | May 16, 08:41 UTC | May 16, 19:35 UTC | 10h 55m |
| 2026-05-15 | AFR257 | SIN → CDG | May 15, 14:45 UTC | May 16, 03:45 UTC | 12h 59m |
| 2026-05-14 | AFR256 | CDG → SIN | May 14, 21:40 UTC | May 15, 09:45 UTC | 12h 5m |
| 2026-05-09 | AFR257 | SIN → CDG | May 9, 15:00 UTC | May 10, 04:04 UTC | 13h 5m |
| 2026-05-08 | AFR256 | CDG → SIN | May 8, 21:45 UTC | May 9, 09:35 UTC | 11h 50m |
| 2026-05-07 | AFR021 | LAX → CDG | May 7, 21:15 UTC | May 8, 07:39 UTC | 10h 25m |
| 2026-05-07 | AFR020 | CDG → LAX | May 7, 08:00 UTC | May 7, 18:25 UTC | 10h 25m |
| 2026-05-06 | AFR279 | HND → CDG | May 6, 13:35 UTC | May 7, 03:35 UTC | 13h 59m |
| 2026-05-05 | AFR274 | CDG → HND | May 5, 21:30 UTC | May 6, 10:30 UTC | 13h 0m |
| 2026-05-05 | AFR007 | - | May 5, 02:10 UTC | May 5, 08:50 UTC | 6h 40m |
| 2026-05-04 | AFR8U | CDG → JFK | May 4, 15:00 UTC | May 4, 22:20 UTC | 7h 21m |
| 2026-05-03 | AFR23G | LAX → CDG | May 3, 22:20 UTC | May 4, 08:35 UTC | 10h 15m |
| 2026-05-03 | AFR22J | CDG → LAX | May 3, 08:50 UTC | May 3, 19:40 UTC | 10h 50m |
| 2026-05-02 | AFR1U | JFK → CDG | May 2, 20:45 UTC | May 3, 03:35 UTC | 6h 49m |
| 2026-05-02 | AFR2N | CDG → JFK | May 2, 07:00 UTC | May 2, 14:15 UTC | 7h 15m |
| 2026-05-01 | AFR279 | HND → CDG | May 1, 13:15 UTC | May 2, 03:25 UTC | 14h 10m |
| 2026-04-30 | AFR274 | CDG → HND | Apr 30, 21:20 UTC | May 1, 10:20 UTC | 13h 0m |
| 2026-04-29 | AFR5U | JFK → CDG | Apr 29, 23:05 UTC | Apr 30, 06:05 UTC | 7h 0m |
| 2026-04-29 | AFR006 | - | Apr 29, 12:40 UTC | Apr 29, 19:45 UTC | 7h 5m |
| 2026-04-29 | AFR091 | MIA → CDG | Apr 29, 00:25 UTC | Apr 29, 08:55 UTC | 8h 30m |
| 2026-04-28 | AFR090 | CDG → MIA | Apr 28, 12:25 UTC | Apr 28, 21:25 UTC | 9h 0m |
| 2026-04-27 | AFR23G | LAX → CDG | Apr 27, 22:25 UTC | Apr 28, 08:25 UTC | 10h 0m |
| 2026-04-27 | AFR22J | CDG → LAX | Apr 27, 08:45 UTC | Apr 27, 19:40 UTC | 10h 55m |
| 2026-04-26 | AFR003 | - | Apr 26, 22:15 UTC | Apr 27, 05:00 UTC | 6h 45m |
| 2026-04-26 | AFR004 | - | Apr 26, 09:10 UTC | Apr 26, 16:20 UTC | 7h 10m |
| 2026-04-25 | AFR279 | HND → CDG | Apr 25, 13:30 UTC | Apr 26, 03:30 UTC | 14h 0m |
| 2026-04-24 | AFR274 | CDG → HND | Apr 24, 21:20 UTC | Apr 25, 10:00 UTC | 12h 40m |
| 2026-04-23 | AFR23G | LAX → CDG | Apr 23, 22:30 UTC | Apr 24, 08:50 UTC | 10h 20m |
| 2026-04-23 | AFR22J | CDG → LAX | Apr 23, 09:25 UTC | Apr 23, 20:25 UTC | 11h 0m |
| 2026-04-21 | AFR5U | JFK → CDG | Apr 21, 23:00 UTC | Apr 22, 06:01 UTC | 7h 0m |
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-GSQY page for operator, model, and routing details .