sensors Mode-S transponder
3991E1
ICAO 24-bit transponder address · allocated to France
Currently assigned to F-HEPB · AIRBUS A-320
- Hex
- 3991E1
- Octal
- 16310741
- Decimal
- 3,772,897
- Country
- FR
- Tail
- F-HEPB
- Type
- A320
- Flights observed
- 141
- Distinct callsigns
- 20
- Country
- FR
- Last broadcast
- 41m ago
Last known position
Country allocation
The ICAO 24-bit address 3991E1 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 |
|---|---|---|---|
| AFR616 | - | 9 | 2026-07-14 |
| AFR617 | - | 8 | 2026-07-13 |
| AFR601 | - | 4 | 2026-07-14 |
| AFR99ZC | Air France | 3 | 2026-05-21 |
| AFR81SL | Air France | 3 | 2026-05-21 |
| AFR7339 | Air France | 3 | 2026-05-21 |
| AFR52PM | Air France | 3 | 2026-05-07 |
| AFR19QA | - | 3 | 2026-04-13 |
| AFR1440 | Air France | 3 | 2026-05-21 |
| AFR99MY | Air France | 2 | 2026-05-16 |
| AFR84ZX | Air France | 2 | 2026-04-28 |
| AFR78RT | Air France | 2 | 2026-05-16 |
| AFR73PJ | Air France | 2 | 2026-04-28 |
| AFR69MP | Air France | 2 | 2026-05-21 |
| AFR62PQ | Air France | 2 | 2026-05-12 |
| AFR61XC | Air France | 2 | 2026-05-07 |
| AFR604 | - | 2 | 2026-07-13 |
| AFR52EP | Air France | 2 | 2026-05-15 |
| AFR47LQ | Air France | 2 | 2026-05-15 |
| AFR45CR | - | 2 | 2026-05-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | AFR616 | - | Jul 14, 23:30 UTC | Jul 15, 00:00 UTC | 30m |
| 2026-07-14 | AFR601 | - | Jul 14, 12:55 UTC | Jul 14, 17:50 UTC | 4h 55m |
| 2026-07-13 | AFR604 | - | Jul 13, 22:05 UTC | Jul 14, 02:40 UTC | 4h 35m |
| 2026-07-13 | AFR617 | - | Jul 13, 14:00 UTC | Jul 13, 16:30 UTC | 2h 30m |
| 2026-07-12 | AFR616 | - | Jul 12, 20:30 UTC | Jul 13, 01:30 UTC | 5h 0m |
| 2026-07-12 | AFR4014 | - | Jul 12, 12:45 UTC | Jul 12, 18:30 UTC | 5h 45m |
| 2026-07-11 | AFR626V | - | Jul 11, 20:35 UTC | Jul 12, 18:30 UTC | 21h 55m |
| 2026-07-11 | AFR629V | - | Jul 11, 15:15 UTC | Jul 11, 18:40 UTC | 3h 25m |
| 2026-07-11 | AFR4010 | - | Jul 11, 13:15 UTC | Jul 11, 13:35 UTC | 20m |
| 2026-07-10 | AFR617 | - | Jul 10, 14:20 UTC | Jul 11, 01:00 UTC | 10h 41m |
| 2026-07-09 | AFR616 | - | Jul 9, 21:25 UTC | Jul 10, 00:00 UTC | 2h 35m |
| 2026-07-09 | AFR601 | - | Jul 9, 12:55 UTC | Jul 9, 17:45 UTC | 4h 50m |
| 2026-07-08 | AFR605 | - | Jul 8, 20:20 UTC | Jul 9, 00:45 UTC | 4h 25m |
| 2026-07-08 | AFR617 | - | Jul 8, 14:15 UTC | Jul 8, 16:40 UTC | 2h 25m |
| 2026-07-07 | AFR616 | - | Jul 7, 21:35 UTC | Jul 8, 00:05 UTC | 2h 30m |
| 2026-07-07 | AFR601 | - | Jul 7, 13:05 UTC | Jul 7, 17:55 UTC | 4h 50m |
| 2026-07-06 | AFR607 | - | Jul 6, 20:00 UTC | Jul 7, 01:00 UTC | 5h 0m |
| 2026-07-05 | AFR617 | - | Jul 5, 15:15 UTC | Jul 5, 17:30 UTC | 2h 15m |
| 2026-07-04 | AFR616 | - | Jul 4, 21:25 UTC | Jul 4, 23:55 UTC | 2h 30m |
| 2026-07-04 | AFR601 | - | Jul 4, 17:15 UTC | Jul 4, 17:40 UTC | 25m |
| 2026-07-03 | AFR600 | FDF → CAY | Jul 3, 16:45 UTC | Jul 3, 17:10 UTC | 25m |
| 2026-07-01 | AFR617 | - | Jul 1, 14:40 UTC | Jul 1, 17:00 UTC | 2h 20m |
| 2026-06-30 | AFR616 | - | Jun 30, 21:20 UTC | Jun 30, 23:45 UTC | 2h 25m |
| 2026-06-29 | AFR604 | - | Jun 29, 20:09 UTC | Jun 30, 00:55 UTC | 4h 45m |
| 2026-06-26 | AFR617 | MIA → PTP | Jun 26, 14:15 UTC | Jun 26, 16:39 UTC | 2h 25m |
| 2026-06-25 | AFR616 | - | Jun 25, 21:15 UTC | Jun 25, 23:49 UTC | 2h 35m |
| 2026-06-12 | AFR617 | MIA → PTP | Jun 12, 14:10 UTC | Jun 12, 16:35 UTC | 2h 25m |
| 2026-06-11 | AFR616 | PTP → MIA | Jun 11, 21:05 UTC | Jun 11, 23:45 UTC | 2h 40m |
| 2026-06-07 | AFR617 | MIA → PTP | Jun 7, 15:40 UTC | Jun 7, 18:10 UTC | 2h 30m |
| 2026-06-06 | AFR616 | PTP → MIA | Jun 6, 23:50 UTC | Jun 7, 02:30 UTC | 2h 40m |
| 2026-05-26 | AFR367V | YQX → CDG | May 26, 11:54 UTC | May 26, 17:44 UTC | 5h 50m |
| 2026-05-25 | AFR367V | YQX → CDG | May 25, 15:25 UTC | May 26, 14:14 UTC | 22h 49m |
| 2026-05-25 | AFR366V | CDG → TLS | May 25, 11:15 UTC | May 25, 14:25 UTC | 3h 10m |
| 2026-05-21 | AFR99ZC | AMS → CDG | May 21, 19:10 UTC | May 21, 19:55 UTC | 45m |
| 2026-05-21 | AFR1440 | CDG → AMS | May 21, 16:55 UTC | May 21, 17:40 UTC | 45m |
| 2026-05-21 | AFR7339 | MRS → CDG | May 21, 14:10 UTC | May 21, 15:20 UTC | 1h 10m |
| 2026-05-21 | AFR81SL | CDG → MRS | May 21, 12:05 UTC | May 21, 13:10 UTC | 1h 5m |
| 2026-05-21 | AFR69MP | VCE → CDG | May 21, 08:45 UTC | May 21, 10:15 UTC | 1h 30m |
| 2026-05-21 | AFR23EQ | - | May 21, 05:10 UTC | May 21, 06:15 UTC | 1h 5m |
| 2026-05-20 | AFR66JB | NTE → CDG | May 20, 18:50 UTC | May 20, 19:35 UTC | 45m |
| 2026-05-20 | AFR57SY | CDG → NTE | May 20, 17:10 UTC | May 20, 17:50 UTC | 40m |
| 2026-05-20 | AFR14BM | TLS → CDG | May 20, 14:15 UTC | May 20, 15:25 UTC | 1h 10m |
| 2026-05-20 | AFR7412 | CDG → TLS | May 20, 12:25 UTC | May 20, 13:20 UTC | 55m |
| 2026-05-20 | AFR45XT | LYS → CDG | May 20, 09:40 UTC | May 20, 10:30 UTC | 50m |
| 2026-05-20 | AFR89VR | FCO → CDG | May 20, 07:40 UTC | May 20, 08:30 UTC | 50m |
| 2026-05-20 | AFR39TV | MAD → CDG | May 20, 04:25 UTC | May 20, 06:10 UTC | 1h 46m |
| 2026-05-19 | AFR62AP | CDG → MAD | May 19, 19:15 UTC | May 19, 20:50 UTC | 1h 35m |
| 2026-05-19 | AFR28WV | BRI → CDG | May 19, 15:40 UTC | May 19, 17:50 UTC | 2h 10m |
| 2026-05-19 | AFR43RA | CDG → BRI | May 19, 12:35 UTC | May 19, 14:35 UTC | 2h 0m |
| 2026-05-19 | AFR11NQ | BOD → CDG | May 19, 10:05 UTC | May 19, 10:55 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-HEPB page for operator, model, and routing details .