Apparatus

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sensors Mode-S transponder

781539

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-302V · AIRBUS A-321

Hex
781539
Octal
36012471
Decimal
7,869,753
Country
CN
Tail
B-302V
Type
A321
No current signal · last broadcast 1h ago
Flights observed
97
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781539.

Country allocation

The ICAO 24-bit address 781539 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 20 distinct

Callsign Airline Flights Last seen
CBJ5532 - 8 2026-07-15
CBJ5125 - 8 2026-07-12
CBJ5146 - 7 2026-05-27
CBJ5126 - 7 2026-07-12
CBJ5348 - 6 2026-07-08
CBJ5264 - 6 2026-06-10
CBJ5136 - 6 2026-05-15
CBJ5570 - 5 2026-05-15
CBJ5776 - 4 2026-07-10
CBJ5596 - 4 2026-07-16
CBJ5347 - 4 2026-07-08
CBJ5378 - 3 2026-07-04
CBJ5595 - 2 2026-07-15
CBJ5569 - 2 2026-06-11
CBJ5531 - 2 2026-07-13
CBJ5220 - 2 2026-06-22
CBJ5219 - 2 2026-06-22
CBJ5195 - 2 2026-06-16
CBJ5135 - 2 2026-05-21
CBJ5943 - 1 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 CBJ5707 - Jul 18, 00:00 UTCJul 18, 00:15 UTC15m
2026-07-16 CBJ5596 - Jul 16, 06:05 UTCJul 16, 15:49 UTC9h 45m
2026-07-15 CBJ5532 - Jul 15, 15:45 UTCJul 15, 15:55 UTC10m
2026-07-15 CBJ5532 - Jul 15, 11:20 UTCJul 15, 11:30 UTC10m
2026-07-15 CBJ5595 - Jul 15, 03:05 UTCJul 15, 03:15 UTC10m
2026-07-13 CBJ5531 - Jul 13, 06:30 UTCJul 13, 15:50 UTC9h 20m
2026-07-12 CBJ5126 - Jul 12, 12:20 UTCJul 13, 06:40 UTC18h 20m
2026-07-12 CBJ5125 - Jul 12, 07:15 UTCJul 12, 12:35 UTC5h 20m
2026-07-11 CBJ5926 - Jul 11, 08:45 UTCJul 11, 13:55 UTC5h 10m
2026-07-10 CBJ5776 - Jul 10, 13:55 UTCJul 11, 05:35 UTC15h 40m
2026-07-10 CBJ5776 - Jul 10, 08:20 UTCJul 11, 05:35 UTC21h 15m
2026-07-10 CBJ5125 - Jul 10, 05:25 UTCJul 10, 23:40 UTC18h 15m
2026-07-09 CBJ5125 - Jul 9, 23:30 UTCJul 10, 14:05 UTC14h 35m
2026-07-08 CBJ5348 - Jul 8, 18:25 UTCJul 8, 18:35 UTC10m
2026-07-08 CBJ5347 - Jul 8, 11:45 UTCJul 8, 12:00 UTC15m
2026-07-07 CBJ5348 - Jul 7, 13:45 UTCJul 7, 14:05 UTC20m
2026-07-07 CBJ5347 - Jul 7, 10:00 UTCJul 7, 10:20 UTC20m
2026-07-04 CBJ5378 - Jul 4, 07:15 UTCJul 4, 08:05 UTC50m
2026-06-26 CBJ5348 - Jun 26, 17:19 UTCJun 26, 17:29 UTC10m
2026-06-26 CBJ5348 - Jun 26, 13:15 UTCJun 26, 13:30 UTC15m
2026-06-26 CBJ5347 - Jun 26, 09:30 UTCJun 26, 09:50 UTC20m
2026-06-24 CBJ5269 - Jun 24, 00:40 UTCJun 24, 00:49 UTC10m
2026-06-22 CBJ5220 - Jun 22, 15:40 UTCJun 22, 15:54 UTC15m
2026-06-22 CBJ5219 - Jun 22, 07:40 UTCJun 22, 08:10 UTC30m
2026-06-21 CBJ5942 - Jun 21, 02:15 UTCJun 21, 10:29 UTC8h 15m
2026-06-20 CBJ5220 - Jun 20, 15:34 UTCJun 20, 15:44 UTC10m
2026-06-20 CBJ5219 - Jun 20, 07:34 UTCJun 20, 07:59 UTC25m
2026-06-19 CBJ5532 - Jun 19, 15:49 UTCJun 20, 01:09 UTC9h 20m
2026-06-19 CBJ5532 - Jun 19, 11:24 UTCJun 19, 11:39 UTC15m
2026-06-18 CBJ5766 - Jun 18, 01:15 UTCJun 18, 15:10 UTC13h 55m
2026-06-17 CBJ5532 - Jun 17, 15:35 UTCJun 17, 16:05 UTC30m
2026-06-16 CBJ5195 - Jun 16, 08:35 UTCJun 16, 15:45 UTC7h 10m
2026-06-15 CBJ5195 - Jun 15, 07:45 UTCJun 15, 16:15 UTC8h 30m
2026-06-15 CBJ5768 - Jun 15, 01:30 UTCJun 15, 05:30 UTC4h 0m
2026-06-14 CBJ5532 - Jun 14, 01:50 UTCJun 14, 15:55 UTC14h 6m
2026-06-13 CBJ5532 - Jun 13, 03:00 UTCJun 13, 16:30 UTC13h 29m
2026-06-12 CBJ5596 - Jun 12, 15:40 UTCJun 13, 03:10 UTC11h 30m
2026-06-12 CBJ5531 - Jun 12, 06:20 UTCJun 13, 03:10 UTC20h 50m
2026-06-11 CBJ5588 - Jun 11, 16:00 UTCJun 11, 16:20 UTC20m
2026-06-11 CBJ5569 - Jun 11, 01:30 UTCJun 11, 11:25 UTC9h 55m
2026-06-10 CBJ5264 - Jun 10, 13:40 UTCJun 11, 11:25 UTC21h 45m
2026-06-10 CBJ5264 - Jun 10, 08:25 UTCJun 11, 01:45 UTC17h 20m
2026-06-10 CBJ5776 - Jun 10, 05:10 UTCJun 11, 01:45 UTC20h 35m
2026-06-09 CBJ5776 - Jun 9, 16:55 UTCJun 10, 14:00 UTC21h 5m
2026-06-04 CBJ5348 - Jun 4, 17:55 UTCJun 4, 18:10 UTC15m
2026-06-04 CBJ5348 - Jun 4, 13:40 UTCJun 4, 13:55 UTC15m
2026-06-04 CBJ5347 - Jun 4, 10:00 UTCJun 4, 10:20 UTC20m
2026-05-31 CBJ5943 - May 31, 00:40 UTCMay 31, 00:55 UTC15m
2026-05-30 CBJ5234 - May 30, 02:45 UTCMay 30, 15:40 UTC12h 55m
2026-05-29 CBJ5125 - May 29, 07:40 UTCMay 30, 02:45 UTC19h 5m

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-302V page for operator, model, and routing details .

Mode-S 781539 frequently asked

What is Mode-S code 781539?
781539 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-302V.
Where is Mode-S 781539 registered?
Mode-S code 781539 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781539 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781539, octal 36012471, decimal 7,869,753.
What flights does 781539 operate?
Mode-S 781539 has broadcast 20 distinct callsigns, including CBJ5532, CBJ5125, CBJ5146, CBJ5126, CBJ5348.