Apparatus

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sensors Mode-S transponder

39B221

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HMRB · BOEING 777-200LR

Hex
39B221
Octal
16331041
Decimal
3,781,153
Country
FR
Tail
F-HMRB
Type
B77L
No current signal · last broadcast 5h ago
Flights observed
183
Distinct callsigns
20
Country
FR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 39B221.

Country allocation

The ICAO 24-bit address 39B221 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
CMA841 - 17 2026-07-13
ABB855 Business Aviation 17 2026-06-19
ABB852 Business Aviation 16 2026-06-23
ABB851 - 16 2026-06-23
ABB859 - 15 2026-06-21
ABB850 - 15 2026-06-22
ABB854 - 14 2026-06-19
ABB853 - 14 2026-06-18
ABB858 - 12 2026-06-21
ABB857 - 11 2026-06-14
CMA840 - 6 2026-07-13
CMA730 - 5 2026-07-11
ABB856 Business Aviation 5 2026-05-29
CMA731 - 4 2026-07-12
CMA627 - 3 2026-07-03
CMA575 - 2 2026-07-05
CMA574 - 2 2026-07-05
CMA573 - 2 2026-06-24
ABB856P - 2 2026-06-13
CMA626 - 1 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CMA841 - Jul 13, 10:20 UTCJul 14, 04:45 UTC18h 25m
2026-07-13 CMA841 - Jul 13, 07:20 UTCJul 14, 04:45 UTC21h 25m
2026-07-13 CMA841 - Jul 13, 04:20 UTCJul 14, 04:15 UTC23h 55m
2026-07-13 CMA840 - Jul 13, 03:40 UTCJul 14, 02:15 UTC22h 35m
2026-07-12 CMA731 - Jul 12, 05:30 UTCJul 12, 18:55 UTC13h 25m
2026-07-11 CMA730 - Jul 11, 15:20 UTCJul 12, 01:40 UTC10h 20m
2026-07-10 CMA841 - Jul 10, 17:05 UTCJul 11, 12:15 UTC19h 10m
2026-07-10 CMA841 - Jul 10, 14:20 UTCJul 11, 12:15 UTC21h 56m
2026-07-10 CMA841 - Jul 10, 12:20 UTCJul 11, 12:15 UTC23h 55m
2026-07-10 CMA840 - Jul 10, 10:25 UTCJul 11, 10:15 UTC23h 51m
2026-07-09 CMA841 - Jul 9, 12:55 UTCJul 10, 06:50 UTC17h 55m
2026-07-09 CMA841 - Jul 9, 08:20 UTCJul 10, 06:50 UTC22h 30m
2026-07-09 CMA840 - Jul 9, 06:20 UTCJul 10, 06:15 UTC23h 55m
2026-07-08 CMA731 - Jul 8, 11:40 UTCJul 9, 03:40 UTC16h 0m
2026-07-08 CMA730 - Jul 8, 07:40 UTCJul 8, 07:50 UTC10m
2026-07-07 CMA730 - Jul 7, 20:35 UTCJul 8, 07:05 UTC10h 30m
2026-07-07 CMA841 - Jul 7, 05:40 UTCJul 7, 10:25 UTC4h 45m
2026-07-06 CMA841 - Jul 6, 10:20 UTCJul 7, 10:15 UTC23h 55m
2026-07-06 CMA841 - Jul 6, 08:20 UTCJul 7, 08:15 UTC23h 55m
2026-07-06 CMA840 - Jul 6, 06:40 UTCJul 7, 06:15 UTC23h 35m
2026-07-05 CMA575 - Jul 5, 23:35 UTCJul 6, 04:20 UTC4h 45m
2026-07-05 CMA575 - Jul 5, 12:05 UTCJul 5, 12:15 UTC10m
2026-07-05 CMA574 - Jul 5, 08:45 UTCJul 5, 09:25 UTC40m
2026-07-04 CMA574 - Jul 4, 21:55 UTCJul 5, 01:55 UTC4h 0m
2026-07-04 CMA841 - Jul 4, 13:25 UTCJul 4, 18:30 UTC5h 5m
2026-07-03 CMA841 - Jul 3, 20:20 UTCJul 4, 18:30 UTC22h 10m
2026-07-03 CMA841 - Jul 3, 18:20 UTCJul 4, 18:15 UTC23h 55m
2026-07-03 CMA840 - Jul 3, 18:05 UTCJul 4, 16:15 UTC22h 10m
2026-07-03 CMA627 - Jul 3, 01:25 UTCJul 3, 15:10 UTC13h 45m
2026-07-02 CMA627 - Jul 2, 17:45 UTCJul 3, 15:10 UTC21h 25m
2026-07-02 CMA627 - Jul 2, 14:45 UTCJul 3, 14:15 UTC23h 30m
2026-07-02 CMA626 - Jul 2, 07:40 UTCJul 3, 01:40 UTC18h 0m
2026-07-01 CMA731 - Jul 1, 12:40 UTCJul 2, 03:20 UTC14h 40m
2026-06-30 CMA730 - Jun 30, 20:50 UTCJul 1, 07:05 UTC10h 15m
2026-06-30 CMA841 - Jun 30, 00:49 UTCJun 30, 05:25 UTC4h 36m
2026-06-29 CMA841 - Jun 29, 08:19 UTCJun 30, 05:25 UTC21h 6m
2026-06-29 CMA841 - Jun 29, 06:19 UTCJun 30, 05:25 UTC23h 6m
2026-06-29 CMA840 - Jun 29, 05:30 UTCJun 30, 04:15 UTC22h 46m
2026-06-28 CMA731 - Jun 28, 04:40 UTCJun 28, 18:44 UTC14h 5m
2026-06-27 CMA730 - Jun 27, 14:54 UTCJun 28, 01:59 UTC11h 5m
2026-06-25 CMA381 - Jun 25, 18:59 UTCJun 26, 05:44 UTC10h 45m
2026-06-25 CMA380 - Jun 25, 03:24 UTCJun 25, 14:04 UTC10h 40m
2026-06-24 CMA573 - Jun 24, 12:44 UTCJun 24, 17:20 UTC4h 35m
2026-06-24 CMA573 - Jun 24, 01:49 UTCJun 24, 02:05 UTC15m
2026-06-23 ABB852 BRU → HKG Jun 23, 23:00 UTCJun 23, 23:24 UTC25m
2026-06-23 ABB852 BRU → HKG Jun 23, 11:29 UTCJun 23, 18:20 UTC6h 50m
2026-06-23 ABB851 - Jun 23, 03:34 UTCJun 23, 08:04 UTC4h 30m
2026-06-22 ABB851 - Jun 22, 16:24 UTCJun 22, 16:40 UTC15m
2026-06-22 ABB850 - Jun 22, 12:15 UTCJun 22, 12:44 UTC30m
2026-06-22 ABB850 - Jun 22, 01:00 UTCJun 22, 04:54 UTC3h 55m

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

Mode-S 39B221 frequently asked

What is Mode-S code 39B221?
39B221 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HMRB.
Where is Mode-S 39B221 registered?
Mode-S code 39B221 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39B221 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39B221, octal 16331041, decimal 3,781,153.
What flights does 39B221 operate?
Mode-S 39B221 has broadcast 20 distinct callsigns, including CMA841, ABB855, ABB852, ABB851, ABB859.