Apparatus

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sensors Mode-S transponder

781B39

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-322M · AIRBUS A-320neo

Hex
781B39
Octal
36015471
Decimal
7,871,289
Country
CN
Tail
B-322M
Type
A20N
No current signal · last broadcast 9d ago
Flights observed
100
Distinct callsigns
19
Country
CN
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S 781B39.

Country allocation

The ICAO 24-bit address 781B39 falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China 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 19 distinct

Callsign Airline Flights Last seen
CBJ619 - 55 2026-07-16
CBJ620 - 15 2026-07-16
CBJ419 - 7 2026-06-16
CBJ420 - 4 2026-06-16
CBJ5922 - 2 2026-06-04
CBJ5724 - 2 2026-05-02
CBJ5532 - 2 2026-05-27
CBJ5921 - 1 2026-06-03
CBJ5919 - 1 2026-06-05
CBJ5765 - 1 2026-05-03
CBJ5685 - 1 2026-06-04
CBJ5618 - 1 2026-05-26
CBJ5617 - 1 2026-05-26
CBJ5606 - 1 2026-05-28
CBJ5513 - 1 2026-05-01
CBJ5291 - 1 2026-06-07
CBJ5220 - 1 2026-06-02
CBJ5111 - 1 2026-06-02
CBJ5096 - 1 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 CBJ5096 - Jul 23, 05:00 UTCJul 23, 05:15 UTC15m
2026-07-16 - - Jul 16, 13:10 UTCJul 16, 13:25 UTC15m
2026-07-16 CBJ620 - Jul 16, 11:05 UTCJul 16, 11:15 UTC10m
2026-07-16 CBJ619 - Jul 16, 07:50 UTCJul 16, 08:15 UTC25m
2026-07-16 CBJ619 - Jul 16, 06:35 UTCJul 16, 06:45 UTC10m
2026-07-15 CBJ620 - Jul 15, 10:20 UTCJul 16, 06:45 UTC20h 25m
2026-07-15 CBJ620 - Jul 15, 08:50 UTCJul 15, 09:00 UTC10m
2026-07-15 CBJ619 - Jul 15, 05:15 UTCJul 15, 07:35 UTC2h 20m
2026-07-14 CBJ619 - Jul 14, 10:20 UTCJul 15, 07:35 UTC21h 14m
2026-07-14 CBJ620 - Jul 14, 08:50 UTCJul 15, 07:35 UTC22h 44m
2026-07-14 CBJ619 - Jul 14, 06:55 UTCJul 14, 07:30 UTC35m
2026-07-13 CBJ619 - Jul 13, 10:20 UTCJul 14, 05:20 UTC19h 0m
2026-07-13 CBJ620 - Jul 13, 08:50 UTCJul 13, 09:05 UTC15m
2026-07-13 CBJ619 - Jul 13, 06:50 UTCJul 13, 07:10 UTC20m
2026-07-13 CBJ619 - Jul 13, 04:25 UTCJul 13, 05:20 UTC55m
2026-07-12 CBJ620 - Jul 12, 09:50 UTCJul 13, 05:20 UTC19h 30m
2026-07-12 CBJ620 - Jul 12, 08:30 UTCJul 12, 08:45 UTC15m
2026-07-12 CBJ619 - Jul 12, 06:30 UTCJul 12, 06:50 UTC20m
2026-07-11 CBJ619 - Jul 11, 10:20 UTCJul 12, 05:20 UTC19h 0m
2026-07-11 CBJ620 - Jul 11, 10:00 UTCJul 12, 05:20 UTC19h 20m
2026-07-11 CBJ620 - Jul 11, 08:40 UTCJul 11, 08:55 UTC15m
2026-07-11 CBJ619 - Jul 11, 06:50 UTCJul 11, 07:10 UTC20m
2026-07-10 CBJ619 - Jul 10, 10:35 UTCJul 11, 05:35 UTC19h 0m
2026-07-10 CBJ620 - Jul 10, 09:15 UTCJul 11, 05:35 UTC20h 20m
2026-07-10 CBJ619 - Jul 10, 05:30 UTCJul 10, 07:45 UTC2h 15m
2026-07-09 CBJ619 - Jul 9, 10:45 UTCJul 10, 07:45 UTC21h 0m
2026-07-09 CBJ619 - Jul 9, 08:45 UTCJul 10, 07:45 UTC23h 0m
2026-07-09 CBJ619 - Jul 9, 04:45 UTCJul 9, 07:00 UTC2h 15m
2026-07-08 CBJ619 - Jul 8, 10:50 UTCJul 9, 07:00 UTC20h 10m
2026-07-08 CBJ619 BKK → BKK Jul 8, 09:20 UTCJul 9, 07:00 UTC21h 40m
2026-07-08 CBJ619 - Jul 8, 05:20 UTCJul 8, 07:55 UTC2h 35m
2026-07-07 CBJ619 - Jul 7, 10:20 UTCJul 8, 07:55 UTC21h 35m
2026-07-07 CBJ619 - Jul 7, 08:55 UTCJul 8, 07:55 UTC23h 0m
2026-07-07 CBJ619 - Jul 7, 04:50 UTCJul 7, 07:00 UTC2h 10m
2026-07-06 CBJ619 - Jul 6, 10:20 UTCJul 7, 07:00 UTC20h 40m
2026-07-06 CBJ620 - Jul 6, 08:50 UTCJul 7, 07:00 UTC22h 10m
2026-07-06 CBJ619 - Jul 6, 04:50 UTCJul 6, 07:10 UTC2h 20m
2026-07-05 CBJ619 - Jul 5, 08:40 UTCJul 6, 07:10 UTC22h 30m
2026-07-05 CBJ619 - Jul 5, 04:50 UTCJul 5, 07:10 UTC2h 20m
2026-07-04 CBJ619 - Jul 4, 10:20 UTCJul 5, 07:10 UTC20h 50m
2026-07-04 CBJ619 - Jul 4, 08:55 UTCJul 5, 07:10 UTC22h 15m
2026-07-04 CBJ619 - Jul 4, 05:55 UTCJul 4, 07:30 UTC1h 35m
2026-07-03 CBJ619 - Jul 3, 10:30 UTCJul 4, 07:30 UTC21h 0m
2026-07-03 CBJ620 - Jul 3, 09:30 UTCJul 4, 07:30 UTC22h 0m
2026-07-03 CBJ619 - Jul 3, 06:15 UTCJul 3, 08:15 UTC2h 0m
2026-07-02 CBJ619 - Jul 2, 10:25 UTCJul 3, 08:15 UTC21h 50m
2026-07-02 CBJ619 - Jul 2, 09:05 UTCJul 3, 08:15 UTC23h 10m
2026-07-02 CBJ619 - Jul 2, 04:55 UTCJul 2, 07:20 UTC2h 25m
2026-07-01 CBJ619 - Jul 1, 10:20 UTCJul 2, 07:20 UTC21h 0m
2026-07-01 CBJ619 - Jul 1, 10:10 UTCJul 2, 07:20 UTC21h 10m

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 B-322M page for operator, model, and routing details .

Mode-S 781B39 frequently asked

What is Mode-S code 781B39?
781B39 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-322M.
Where is Mode-S 781B39 registered?
Mode-S code 781B39 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B39 broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B39, octal 36015471, decimal 7,871,289.
What flights does 781B39 operate?
Mode-S 781B39 has broadcast 19 distinct callsigns, including CBJ619, CBJ620, CBJ419, CBJ420, CBJ5922.