Apparatus

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sensors Mode-S transponder

3991E3

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HEPD · AIRBUS A-320

Hex
3991E3
Octal
16310743
Decimal
3,772,899
Country
FR
Tail
F-HEPD
Type
A320
Broadcasting now · callsign AFR41ZX · 26,775 ft
Flights observed
479
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 19:55 UTC

Current position

3991E3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3991E3 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
AFR62AP Air France 7 2026-07-25
AFR39TV Air France 7 2026-07-26
AFR64PQ Air France 5 2026-07-16
AFR53UR Air France 5 2026-06-03
AFR38HQ Air France 5 2026-06-03
AFR18LZ Air France 5 2026-07-17
AFR18DQ - 5 2026-07-11
AFR1855 Air France 5 2026-06-26
AFR1854 - 5 2026-06-26
AFR1776 Air France 5 2026-07-24
AFR1596 Air France 5 2026-06-03
AFR1497 Air France 5 2026-07-23
AFR1496 Air France 5 2026-07-22
AFR1055 Air France 5 2026-05-30
AFR1054 Air France 5 2026-05-29
AFR78RT - 4 2026-06-23
AFR74NQ Air France 4 2026-07-25
AFR7323 Air France 4 2026-07-21
AFR72UQ Air France 4 2026-07-21
AFR62RZ - 4 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR42KK CDG → ATH Jul 26, 17:20 UTCJul 26, 19:55 UTC2h 35m
2026-07-26 AFR41BL ATH → CDG Jul 26, 12:00 UTCJul 26, 15:15 UTC3h 15m
2026-07-26 AFR12HA DUB → CDG Jul 26, 07:40 UTCJul 26, 10:25 UTC2h 45m
2026-07-26 AFR39TV MAD → CDG Jul 26, 04:10 UTCJul 26, 06:05 UTC1h 55m
2026-07-25 AFR62AP CDG → MAD Jul 25, 22:10 UTCJul 25, 23:40 UTC1h 30m
2026-07-25 AFR1099 JMK → CDG Jul 25, 14:55 UTCJul 25, 18:10 UTC3h 15m
2026-07-25 AFR1098 CDG → JMK Jul 25, 10:45 UTCJul 25, 13:35 UTC2h 50m
2026-07-25 AFR74NQ RAK → CDG Jul 25, 05:45 UTCJul 25, 08:20 UTC2h 35m
2026-07-24 AFR1776 CDG → RAK Jul 24, 20:05 UTCJul 24, 23:05 UTC3h 0m
2026-07-24 AFR88QJ HER → CDG Jul 24, 10:50 UTCJul 24, 14:15 UTC3h 25m
2026-07-24 AFR1446 CDG → HER Jul 24, 06:20 UTCJul 24, 09:15 UTC2h 55m
2026-07-23 AFR24RJ HER → CDG Jul 23, 16:10 UTCJul 23, 19:45 UTC3h 35m
2026-07-23 AFR45JD CDG → HER Jul 23, 12:00 UTCJul 23, 14:40 UTC2h 40m
2026-07-23 AFR1497 CMN → CDG Jul 23, 06:50 UTCJul 23, 09:20 UTC2h 30m
2026-07-22 AFR1496 CDG → CMN Jul 22, 17:10 UTCJul 22, 20:00 UTC2h 50m
2026-07-22 AFR41BL - Jul 22, 12:25 UTCJul 22, 15:40 UTC3h 15m
2026-07-22 AFR12HA DUB → CDG Jul 22, 10:20 UTCJul 22, 11:25 UTC1h 5m
2026-07-22 AFR39TV MAD → CDG Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-21 AFR62AP CDG → MAD Jul 21, 19:35 UTCJul 21, 21:10 UTC1h 35m
2026-07-21 AFR33EP BCN → CDG Jul 21, 16:35 UTCJul 21, 18:05 UTC1h 30m
2026-07-21 AFR63TJ CDG → BCN Jul 21, 13:50 UTCJul 21, 15:10 UTC1h 20m
2026-07-21 AFR62RZ CPH → CDG Jul 21, 11:00 UTCJul 21, 12:30 UTC1h 30m
2026-07-21 AFR72UQ CDG → CPH Jul 21, 08:20 UTCJul 21, 09:45 UTC1h 25m
2026-07-21 AFR7323 NCE → CDG Jul 21, 05:30 UTCJul 21, 06:50 UTC1h 20m
2026-07-20 AFR13DT CDG → NCE Jul 20, 19:45 UTCJul 20, 20:50 UTC1h 5m
2026-07-20 AFR7369 LYS → CDG Jul 20, 17:30 UTCJul 20, 18:20 UTC50m
2026-07-20 AFR55QX CDG → LYS Jul 20, 15:50 UTCJul 20, 16:30 UTC40m
2026-07-20 AFR1655 ALG → CDG Jul 20, 12:10 UTCJul 20, 14:05 UTC1h 55m
2026-07-20 AFR1654 CDG → ALG Jul 20, 08:30 UTCJul 20, 10:05 UTC1h 35m
2026-07-20 AFR14WZ NAP → CDG Jul 20, 04:45 UTCJul 20, 06:45 UTC2h 0m
2026-07-19 AFR73CU CDG → NAP Jul 19, 18:10 UTCJul 19, 19:45 UTC1h 35m
2026-07-19 AFR98FV - Jul 19, 15:35 UTCJul 19, 16:45 UTC1h 10m
2026-07-19 AFR83HE - Jul 19, 13:15 UTCJul 19, 14:20 UTC1h 5m
2026-07-19 AFR1891 IST → CDG Jul 19, 09:05 UTCJul 19, 11:45 UTC2h 40m
2026-07-19 AFR64BL CDG → MLA Jul 19, 05:25 UTCJul 19, 07:40 UTC2h 15m
2026-07-18 AFR1891 MLA → CDG Jul 18, 17:15 UTCJul 18, 19:50 UTC2h 35m
2026-07-18 AFR64BL - Jul 18, 13:30 UTCJul 18, 15:50 UTC2h 20m
2026-07-18 AFR1349 BCN → CDG Jul 18, 10:30 UTCJul 18, 11:50 UTC1h 20m
2026-07-18 AFR27RN - Jul 18, 07:35 UTCJul 18, 09:05 UTC1h 30m
2026-07-18 AFR39TV - Jul 18, 04:30 UTCJul 18, 05:55 UTC1h 25m
2026-07-17 AFR62AP - Jul 17, 19:30 UTCJul 17, 21:15 UTC1h 45m
2026-07-17 AFR76QE MXP → CDG Jul 17, 17:15 UTCJul 17, 18:19 UTC1h 5m
2026-07-17 AFR93SM - Jul 17, 14:20 UTCJul 17, 15:20 UTC1h 0m
2026-07-17 AFR41DU - Jul 17, 11:45 UTCJul 17, 12:55 UTC1h 10m
2026-07-17 AFR61AL - Jul 17, 08:54 UTCJul 17, 10:00 UTC1h 5m
2026-07-17 AFR18LZ LIS → CDG Jul 17, 04:49 UTCJul 17, 06:54 UTC2h 5m
2026-07-16 AFR64PQ CDG → LIS Jul 16, 19:05 UTCJul 16, 21:30 UTC2h 25m
2026-07-16 AFR39MU - Jul 16, 11:05 UTCJul 16, 12:34 UTC1h 30m
2026-07-16 AFR22YN - Jul 16, 07:35 UTCJul 16, 09:35 UTC2h 0m
2026-07-16 AFR88NC - Jul 16, 04:15 UTCJul 16, 05:05 UTC50m

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-HEPD page for operator, model, and routing details .

Mode-S 3991E3 frequently asked

What is Mode-S code 3991E3?
3991E3 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HEPD.
Where is Mode-S 3991E3 registered?
Mode-S code 3991E3 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3991E3 broadcasting right now?
Yes. Mode-S 3991E3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3991E3, octal 16310743, decimal 3,772,899.
What flights does 3991E3 operate?
Mode-S 3991E3 has broadcast 20 distinct callsigns, including AFR62AP, AFR39TV, AFR64PQ, AFR53UR, AFR38HQ.