Apparatus

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sensors Mode-S transponder

781BF5

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-324Q · AIRBUS A-321neo

Hex
781BF5
Octal
36015765
Decimal
7,871,477
Country
CN
Tail
B-324Q
Type
A21N
Broadcasting now · callsign CSN317 · 7,400 ft
Flights observed
132
Distinct callsigns
20
Country
CN
Last broadcast
5h ago

Current position

781BF5 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781BF5 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
CSN318 - 18 2026-07-13
CSN317 - 18 2026-07-13
CSN5097 - 12 2026-07-17
CSN5098 - 11 2026-07-17
CSN355 - 11 2026-07-12
CSN356 - 9 2026-07-12
CSN8010 - 5 2026-07-10
CSN8009 - 5 2026-07-10
CSN6028 China Southern Airlines 5 2026-06-30
CSN3193 - 5 2026-07-11
CSN5068 China Southern Airlines 3 2026-06-25
CSN5067 - 3 2026-06-25
CSN6159 - 2 2026-07-11
CSN6027 - 2 2026-06-30
CSN5004 China Southern Airlines 2 2026-05-09
CSN5003 China Southern Airlines 2 2026-05-08
CSN3194 China Southern Airlines 2 2026-05-29
CSN8996 - 1 2026-07-05
CSN8995 - 1 2026-07-04
CSN8930 China Southern Airlines 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CSN5098 - Jul 17, 21:25 UTCJul 17, 21:39 UTC15m
2026-07-17 CSN5097 - Jul 17, 10:55 UTCJul 17, 11:04 UTC10m
2026-07-14 CSN5098 - Jul 14, 21:40 UTCJul 14, 21:55 UTC15m
2026-07-14 CSN5097 - Jul 14, 11:00 UTCJul 14, 11:20 UTC20m
2026-07-13 CSN318 - Jul 13, 04:35 UTCJul 13, 12:45 UTC8h 10m
2026-07-13 CSN317 - Jul 13, 02:45 UTCJul 13, 03:10 UTC25m
2026-07-12 CSN5098 - Jul 12, 21:35 UTCJul 12, 21:50 UTC15m
2026-07-12 CSN5097 - Jul 12, 11:10 UTCJul 12, 11:25 UTC15m
2026-07-12 CSN356 - Jul 12, 06:55 UTCJul 12, 07:10 UTC15m
2026-07-12 CSN355 - Jul 12, 04:35 UTCJul 12, 05:15 UTC40m
2026-07-11 CSN6159 - Jul 11, 10:45 UTCJul 11, 10:55 UTC10m
2026-07-11 CSN3193 - Jul 11, 04:45 UTCJul 11, 04:55 UTC10m
2026-07-10 CSN8010 - Jul 10, 17:50 UTCJul 10, 19:05 UTC1h 15m
2026-07-10 CSN8009 - Jul 10, 11:50 UTCJul 10, 16:05 UTC4h 15m
2026-07-10 CSN3193 - Jul 10, 04:50 UTCJul 10, 05:05 UTC15m
2026-07-09 CSN318 - Jul 9, 05:10 UTCJul 9, 05:35 UTC25m
2026-07-09 CSN317 - Jul 9, 02:50 UTCJul 9, 03:10 UTC20m
2026-07-08 CSN5098 - Jul 8, 21:40 UTCJul 8, 21:55 UTC15m
2026-07-08 CSN5097 - Jul 8, 10:55 UTCJul 8, 11:20 UTC25m
2026-07-08 CSN356 - Jul 8, 06:00 UTCJul 8, 06:20 UTC20m
2026-07-08 CSN355 - Jul 8, 03:50 UTCJul 8, 04:15 UTC25m
2026-07-07 CSN6159 - Jul 7, 10:45 UTCJul 7, 10:55 UTC10m
2026-07-06 CSN318 - Jul 6, 05:10 UTCJul 6, 05:40 UTC30m
2026-07-06 CSN317 - Jul 6, 02:20 UTCJul 6, 02:50 UTC30m
2026-07-05 CSN8996 - Jul 5, 07:30 UTCJul 5, 08:00 UTC30m
2026-07-04 CSN8995 - Jul 4, 23:20 UTCJul 4, 23:35 UTC15m
2026-07-03 CSN8010 - Jul 3, 16:00 UTCJul 3, 17:10 UTC1h 10m
2026-07-03 CSN8009 - Jul 3, 12:40 UTCJul 3, 14:00 UTC1h 20m
2026-07-02 CSN5438 - Jul 2, 10:55 UTCJul 2, 11:10 UTC15m
2026-07-02 CSN5437 - Jul 2, 01:30 UTCJul 2, 01:50 UTC20m
2026-06-30 CSN6028 TAS → PKX Jun 30, 22:10 UTCJun 30, 22:25 UTC15m
2026-06-30 CSN6027 - Jun 30, 09:35 UTCJun 30, 09:55 UTC20m
2026-06-30 CSN318 - Jun 30, 04:55 UTCJun 30, 05:20 UTC25m
2026-06-30 CSN317 - Jun 30, 02:30 UTCJun 30, 02:55 UTC25m
2026-06-29 CSN318 - Jun 29, 04:39 UTCJun 29, 04:55 UTC15m
2026-06-29 CSN317 - Jun 29, 02:30 UTCJun 29, 02:54 UTC25m
2026-06-28 CSN5098 ALA → PKX Jun 28, 21:40 UTCJun 28, 21:55 UTC15m
2026-06-28 CSN5097 - Jun 28, 11:45 UTCJun 28, 12:05 UTC20m
2026-06-28 CSN356 - Jun 28, 07:14 UTCJun 28, 07:34 UTC20m
2026-06-28 CSN355 - Jun 28, 03:29 UTCJun 28, 04:15 UTC45m
2026-06-27 CSN6914 - Jun 27, 00:14 UTCJun 27, 00:34 UTC20m
2026-06-26 CSN318 - Jun 26, 05:10 UTCJun 26, 05:30 UTC20m
2026-06-26 CSN317 - Jun 26, 02:40 UTCJun 26, 03:05 UTC25m
2026-06-25 CSN5068 FRU → PKX Jun 25, 21:50 UTCJun 25, 21:59 UTC10m
2026-06-25 CSN5067 - Jun 25, 10:39 UTCJun 25, 10:55 UTC15m
2026-06-24 CSN5903 - Jun 24, 08:45 UTCJun 24, 08:55 UTC10m
2026-06-24 CSN318 - Jun 24, 04:39 UTCJun 24, 05:05 UTC25m
2026-06-24 CSN317 - Jun 24, 02:30 UTCJun 24, 02:54 UTC25m
2026-06-23 CSN6028 TAS → PKX Jun 23, 22:15 UTCJun 23, 22:29 UTC15m
2026-06-22 CSN318 - Jun 22, 04:34 UTCJun 22, 04:59 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 B-324Q page for operator, model, and routing details .

Mode-S 781BF5 frequently asked

What is Mode-S code 781BF5?
781BF5 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-324Q.
Where is Mode-S 781BF5 registered?
Mode-S code 781BF5 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781BF5 broadcasting right now?
Yes. Mode-S 781BF5 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781BF5, octal 36015765, decimal 7,871,477.
What flights does 781BF5 operate?
Mode-S 781BF5 has broadcast 20 distinct callsigns, including CSN318, CSN317, CSN5097, CSN5098, CSN355.