Apparatus

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sensors Mode-S transponder

39BB21

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HOZB · AIRBUS A220-300

Hex
39BB21
Octal
16335441
Decimal
3,783,457
Country
FR
Tail
F-HOZB
Type
BCS3
No current signal · last broadcast Jul 26, 20:10 UTC
Flights observed
603
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 20:10 UTC

Last known position

Most recent position reported by Mode-S 39BB21.

Country allocation

The ICAO 24-bit address 39BB21 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
AFR69DF - 8 2026-07-04
AFR79BN - 7 2026-07-05
AFR78RM Air France 7 2026-06-12
AFR77SB Air France 7 2026-07-26
AFR18UP - 7 2026-07-15
AFR89SR - 6 2026-07-09
AFR82PT Air France 6 2026-06-10
AFR73MR - 6 2026-07-25
AFR24SY - 6 2026-07-12
AFR1610 - 6 2026-06-21
AFR13AB - 6 2026-06-22
AFR11ZB Air France 6 2026-06-10
AFR87JD - 5 2026-07-25
AFR79JE - 5 2026-07-11
AFR65JZ - 5 2026-07-24
AFR54EF - 5 2026-06-13
AFR53EJ - 5 2026-07-15
AFR35BQ Air France 5 2026-07-19
AFR34UL Air France 5 2026-07-19
AFR33SQ Air France 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR38CX GVA → CDG Jul 26, 19:20 UTCJul 26, 20:10 UTC50m
2026-07-26 AFR44SZ CDG → GVA Jul 26, 17:35 UTCJul 26, 18:20 UTC45m
2026-07-26 AFR1649 BCN → CDG Jul 26, 14:45 UTCJul 26, 16:20 UTC1h 35m
2026-07-26 AFR75SH CDG → BCN Jul 26, 11:50 UTCJul 26, 13:15 UTC1h 25m
2026-07-26 AFR62TN BES → CDG Jul 26, 08:45 UTCJul 26, 09:40 UTC55m
2026-07-26 AFR34DB CDG → BES Jul 26, 06:50 UTCJul 26, 07:40 UTC50m
2026-07-26 AFR77SB CDG → CFE Jul 26, 04:10 UTCJul 26, 05:20 UTC1h 10m
2026-07-25 AFR73MR - Jul 25, 20:10 UTCJul 25, 21:20 UTC1h 10m
2026-07-25 AFR1227 VCE → CDG Jul 25, 17:05 UTCJul 25, 18:30 UTC1h 25m
2026-07-25 AFR1226 CDG → VCE Jul 25, 14:30 UTCJul 25, 15:45 UTC1h 15m
2026-07-25 AFR63XU BUD → CDG Jul 25, 11:15 UTCJul 25, 13:10 UTC1h 55m
2026-07-25 AFR32GL CDG → BUD Jul 25, 08:10 UTCJul 25, 10:10 UTC2h 0m
2026-07-25 AFR87JD - Jul 25, 04:20 UTCJul 25, 06:20 UTC2h 0m
2026-07-24 AFR65JZ - Jul 24, 18:10 UTCJul 24, 20:15 UTC2h 5m
2026-07-24 AFR14BM TLS → CDG Jul 24, 14:35 UTCJul 24, 15:40 UTC1h 5m
2026-07-24 AFR7412 CDG → TLS Jul 24, 12:25 UTCJul 24, 13:25 UTC1h 0m
2026-07-24 AFR34JW HAM → CDG Jul 24, 09:30 UTCJul 24, 10:45 UTC1h 15m
2026-07-24 AFR36YL CDG → HAM Jul 24, 07:05 UTCJul 24, 08:20 UTC1h 15m
2026-07-24 AFR7509 NTE → CDG Jul 24, 04:25 UTCJul 24, 05:10 UTC45m
2026-07-23 AFR7508 ORY → TLN Jul 23, 19:45 UTCJul 23, 20:30 UTC45m
2026-07-23 AFR88JK - Jul 23, 17:35 UTCJul 23, 18:35 UTC1h 0m
2026-07-23 AFR1168 CDG → MAN Jul 23, 15:15 UTCJul 23, 16:15 UTC1h 0m
2026-07-23 AFR1285 TUN → CDG Jul 23, 11:35 UTCJul 23, 13:55 UTC2h 20m
2026-07-23 AFR1284 CDG → TUN Jul 23, 07:40 UTCJul 23, 09:20 UTC1h 40m
2026-07-23 AFR16TL BLQ → CDG Jul 23, 04:20 UTCJul 23, 05:55 UTC1h 35m
2026-07-22 AFR75NZ CDG → BLQ Jul 22, 19:40 UTCJul 22, 20:50 UTC1h 10m
2026-07-22 AFR19HU - Jul 22, 16:35 UTCJul 22, 17:55 UTC1h 20m
2026-07-22 AFR1486 CDG → EDI Jul 22, 14:05 UTCJul 22, 15:30 UTC1h 25m
2026-07-22 AFR41DU NCE → CDG Jul 22, 11:20 UTCJul 22, 12:35 UTC1h 15m
2026-07-22 AFR29TM EDI → CDG Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-21 AFR1886 CDG → EDI Jul 21, 18:35 UTCJul 21, 20:00 UTC1h 25m
2026-07-21 AFR45KP - Jul 21, 15:00 UTCJul 21, 15:35 UTC35m
2026-07-21 AFR38XY CDG → LHR Jul 21, 12:05 UTCJul 21, 12:55 UTC50m
2026-07-21 AFR91KN AMS → CDG Jul 21, 09:05 UTCJul 21, 09:55 UTC50m
2026-07-21 AFR11YA CDG → AMS Jul 21, 06:30 UTCJul 21, 07:15 UTC45m
2026-07-20 AFR58CW PRG → CDG Jul 20, 18:25 UTCJul 20, 19:45 UTC1h 20m
2026-07-20 AFR1082 - Jul 20, 16:00 UTCJul 20, 17:20 UTC1h 20m
2026-07-20 AFR1889 OTP → CDG Jul 20, 11:50 UTCJul 20, 14:45 UTC2h 55m
2026-07-20 AFR11UW CDG → OTP Jul 20, 08:00 UTCJul 20, 10:20 UTC2h 20m
2026-07-20 AFR33SQ PRG → CDG Jul 20, 05:05 UTCJul 20, 06:35 UTC1h 30m
2026-07-19 00000000 - Jul 19, 18:25 UTCJul 19, 19:35 UTC1h 10m
2026-07-19 AFR68LT - Jul 19, 15:30 UTCJul 19, 16:55 UTC1h 25m
2026-07-19 AFR7326 - Jul 19, 13:10 UTCJul 19, 14:20 UTC1h 10m
2026-07-19 AFR34UL LIN → CDG Jul 19, 10:25 UTCJul 19, 11:40 UTC1h 15m
2026-07-19 AFR35BQ CDG → LIN Jul 19, 08:05 UTCJul 19, 09:00 UTC55m
2026-07-19 AFR64SD BUD → CDG Jul 19, 04:20 UTCJul 19, 06:30 UTC2h 10m
2026-07-18 AFR1694 - Jul 18, 19:40 UTCJul 18, 21:20 UTC1h 40m
2026-07-18 AFR44HV LGW → CDG Jul 18, 16:50 UTCJul 18, 17:50 UTC1h 0m
2026-07-18 AFR44HV LGW → CDG Jul 18, 14:00 UTCJul 18, 14:55 UTC55m
2026-07-18 AFR1687 - Jul 18, 10:55 UTCJul 18, 12:15 UTC1h 20m

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

Mode-S 39BB21 frequently asked

What is Mode-S code 39BB21?
39BB21 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HOZB.
Where is Mode-S 39BB21 registered?
Mode-S code 39BB21 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39BB21 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39BB21, octal 16335441, decimal 3,783,457.
What flights does 39BB21 operate?
Mode-S 39BB21 has broadcast 20 distinct callsigns, including AFR69DF, AFR79BN, AFR78RM, AFR77SB, AFR18UP.