Apparatus

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sensors Mode-S transponder

3A2E21

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-OLRB · BOEING 787-8 Dreamliner

Hex
3A2E21
Octal
16427041
Decimal
3,812,897
Country
FR
Tail
F-OLRB
Type
B788
No current signal · last broadcast 16h ago
Flights observed
54
Distinct callsigns
11
Country
FR
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 3A2E21.

Country allocation

The ICAO 24-bit address 3A2E21 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 11 distinct

Callsign Airline Flights Last seen
REU975 Air Austral 15 2026-05-27
REU974 Air Austral 14 2026-05-25
REU971 Air Austral 6 2026-05-14
REU976 Air Austral 5 2026-05-29
REU973 Air Austral 4 2026-05-25
REU885 Air Austral 3 2026-04-28
REU979 Air Austral 2 2026-05-23
REU978 Air Austral 2 2026-05-23
REU9901 Air Austral 1 2026-05-16
REU972 Air Austral 1 2026-05-14
REU886 Air Austral 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 REU976 CDG → DZA May 29, 19:00 UTCMay 29, 21:50 UTC2h 50m
2026-05-27 REU975 RUN → CDG May 27, 00:14 UTCMay 27, 03:20 UTC3h 5m
2026-05-25 REU974 CDG → RUN May 25, 17:15 UTCMay 25, 20:09 UTC2h 54m
2026-05-25 REU973 NBO → CDG May 25, 01:55 UTCMay 25, 03:25 UTC1h 30m
2026-05-23 REU978 NBO → DZA May 23, 20:50 UTCMay 24, 00:30 UTC3h 40m
2026-05-23 REU979 DZA → NBO May 23, 15:40 UTCMay 23, 18:45 UTC3h 6m
2026-05-22 REU976 CDG → DZA May 22, 18:40 UTCMay 22, 22:20 UTC3h 40m
2026-05-20 REU975 RUN → CDG May 20, 00:20 UTCMay 20, 03:35 UTC3h 15m
2026-05-18 REU974 CDG → RUN May 18, 17:05 UTCMay 18, 20:30 UTC3h 24m
2026-05-16 REU9901 CDG → BYJ May 16, 04:25 UTCMay 16, 08:05 UTC3h 41m
2026-05-14 REU972 CDG → RUN May 14, 22:15 UTCMay 15, 00:55 UTC2h 40m
2026-05-14 REU971 RUN → CDG May 14, 16:40 UTCMay 14, 20:15 UTC3h 35m
2026-05-13 REU971 RUN → CDG May 13, 22:25 UTCMay 14, 20:15 UTC21h 50m
2026-05-13 REU971 RUN → CDG May 13, 20:20 UTCMay 14, 20:15 UTC23h 55m
2026-05-13 REU974 CDG → RUN May 13, 19:50 UTCMay 14, 18:15 UTC22h 25m
2026-05-10 REU973 NBO → CDG May 10, 23:29 UTCMay 11, 03:55 UTC4h 25m
2026-05-09 REU978 NBO → DZA May 9, 20:49 UTCMay 9, 23:30 UTC2h 40m
2026-05-09 REU979 DZA → NBO May 9, 15:05 UTCMay 9, 18:30 UTC3h 25m
2026-05-08 REU976 CDG → DZA May 8, 18:25 UTCMay 8, 22:10 UTC3h 45m
2026-05-08 REU973 NBO → CDG May 8, 00:25 UTCMay 8, 03:44 UTC3h 20m
2026-05-06 REU976 CDG → DZA May 6, 18:40 UTCMay 6, 21:35 UTC2h 55m
2026-05-06 REU973 NBO → CDG May 6, 00:10 UTCMay 6, 03:30 UTC3h 20m
2026-05-04 REU976 CDG → DZA May 4, 20:15 UTCMay 4, 22:55 UTC2h 40m
2026-05-03 REU971 RUN → CDG May 3, 14:45 UTCMay 3, 18:00 UTC3h 15m
2026-05-02 REU971 RUN → CDG May 2, 20:20 UTCMay 3, 18:00 UTC21h 39m
2026-05-02 REU971 RUN → CDG May 2, 18:20 UTCMay 3, 18:00 UTC23h 39m
2026-05-02 REU974 CDG → RUN May 2, 17:05 UTCMay 3, 16:15 UTC23h 9m
2026-05-01 REU975 RUN → CDG May 1, 23:40 UTCMay 2, 03:35 UTC3h 55m
2026-04-30 REU974 CDG → RUN Apr 30, 17:00 UTCApr 30, 20:20 UTC3h 20m
2026-04-30 REU975 RUN → CDG Apr 30, 00:30 UTCApr 30, 04:00 UTC3h 30m
2026-04-29 REU975 RUN → CDG Apr 29, 02:20 UTCApr 30, 02:15 UTC23h 55m
2026-04-28 REU885 RUN → BKK Apr 28, 22:49 UTCApr 28, 23:35 UTC45m
2026-04-27 REU974 CDG → RUN Apr 27, 17:10 UTCApr 27, 20:00 UTC2h 50m
2026-04-27 REU975 RUN → CDG Apr 27, 00:25 UTCApr 27, 03:40 UTC3h 15m
2026-04-25 REU974 CDG → RUN Apr 25, 17:15 UTCApr 25, 20:25 UTC3h 10m
2026-04-24 REU975 RUN → CDG Apr 24, 23:25 UTCApr 25, 03:35 UTC4h 10m
2026-04-23 REU974 CDG → RUN Apr 23, 17:00 UTCApr 23, 20:35 UTC3h 34m
2026-04-22 REU975 RUN → CDG Apr 22, 23:40 UTCApr 23, 03:40 UTC4h 0m
2026-04-22 REU975 RUN → CDG Apr 22, 02:35 UTCApr 23, 02:15 UTC23h 40m
2026-04-21 REU885 RUN → BKK Apr 21, 22:40 UTCApr 21, 23:45 UTC1h 5m
2026-04-20 REU974 CDG → RUN Apr 20, 17:10 UTCApr 20, 19:50 UTC2h 40m
2026-04-20 REU975 RUN → CDG Apr 20, 01:55 UTCApr 20, 05:20 UTC3h 25m
2026-04-18 REU974 CDG → RUN Apr 18, 17:10 UTCApr 18, 19:55 UTC2h 45m
2026-04-18 REU975 RUN → CDG Apr 18, 03:25 UTCApr 18, 04:25 UTC1h 0m
2026-04-18 REU975 RUN → CDG Apr 18, 01:25 UTCApr 18, 03:20 UTC1h 55m
2026-04-16 REU974 CDG → RUN Apr 16, 19:15 UTCApr 16, 20:05 UTC50m
2026-04-16 REU974 CDG → RUN Apr 16, 17:15 UTCApr 16, 19:10 UTC1h 55m
2026-04-16 REU975 RUN → CDG Apr 16, 03:09 UTCApr 16, 04:10 UTC1h 0m
2026-04-16 REU975 RUN → CDG Apr 16, 01:10 UTCApr 16, 03:04 UTC1h 55m
2026-04-15 REU886 BKK → RUN Apr 15, 02:25 UTCApr 15, 02:50 UTC25m

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

Mode-S 3A2E21 frequently asked

What is Mode-S code 3A2E21?
3A2E21 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-OLRB.
Where is Mode-S 3A2E21 registered?
Mode-S code 3A2E21 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3A2E21 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3A2E21, octal 16427041, decimal 3,812,897.
What flights does 3A2E21 operate?
Mode-S 3A2E21 has broadcast 11 distinct callsigns, including REU975, REU974, REU971, REU976, REU973.