Apparatus

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sensors Mode-S transponder

781099

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8673 · AIRBUS A-320neo

Hex
781099
Octal
36010231
Decimal
7,868,569
Country
CN
Tail
B-8673
Type
A20N
No current signal · last broadcast 13h ago
Flights observed
86
Distinct callsigns
20
Country
CN
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 781099.

Country allocation

The ICAO 24-bit address 781099 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
CSN6483 - 10 2026-06-25
CSN6403 - 8 2026-07-19
CSN6469 China Southern Airlines 5 2026-07-23
CSN6304 - 5 2026-07-08
CSN5811 China Southern Airlines 5 2026-07-22
CSN6456 - 4 2026-07-02
CSN6315 - 4 2026-07-01
CSN6310 - 4 2026-07-04
CSN6303 - 4 2026-07-08
CSN6465 China Southern Airlines 3 2026-04-30
CSN6367 China Southern Airlines 3 2026-06-09
CSN6309 - 3 2026-07-03
CSN681 - 2 2026-07-14
CSN6673 China Southern Airlines 2 2026-07-19
CSN6484 China Southern Airlines 2 2026-05-07
CSN6347 China Southern Airlines 2 2026-05-02
CSN6339 China Southern Airlines 2 2026-06-05
CSN6301 - 2 2026-06-20
CSN5366 China Southern Airlines 2 2026-07-24
CSN682 - 1 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CSN5366 KMG → SHE Jul 24, 10:05 UTCJul 24, 10:30 UTC25m
2026-07-23 CSN5366 KMG → SHE Jul 23, 11:00 UTCJul 24, 10:15 UTC23h 15m
2026-07-23 CSN6469 SHE → CKG Jul 23, 02:00 UTCJul 23, 11:00 UTC9h 0m
2026-07-22 CSN6469 SHE → CKG Jul 22, 12:30 UTCJul 23, 11:00 UTC22h 30m
2026-07-22 CSN5811 SHE → HGH Jul 22, 04:20 UTCJul 23, 02:05 UTC21h 45m
2026-07-22 CSN5811 SHE → HGH Jul 22, 01:40 UTCJul 22, 12:35 UTC10h 55m
2026-07-19 CSN6673 SHE → TFU Jul 19, 14:40 UTCJul 20, 08:35 UTC17h 55m
2026-07-19 CSN6673 SHE → TFU Jul 19, 10:30 UTCJul 20, 08:35 UTC22h 5m
2026-07-19 CSN6403 - Jul 19, 01:35 UTCJul 19, 14:45 UTC13h 10m
2026-07-18 CSN5811 - Jul 18, 04:20 UTCJul 19, 01:55 UTC21h 35m
2026-07-18 CSN5811 - Jul 18, 04:10 UTCJul 19, 01:55 UTC21h 45m
2026-07-17 CSN5811 - Jul 17, 09:45 UTCJul 18, 04:50 UTC19h 6m
2026-07-16 CSN6517 - Jul 16, 02:35 UTCJul 16, 03:15 UTC40m
2026-07-15 CSN682 - Jul 15, 04:10 UTCJul 15, 04:25 UTC15m
2026-07-14 CSN681 - Jul 14, 08:55 UTCJul 15, 02:00 UTC17h 4m
2026-07-14 CSN681 - Jul 14, 06:00 UTCJul 15, 02:00 UTC19h 59m
2026-07-12 CSN6403 - Jul 12, 01:05 UTCJul 12, 15:35 UTC14h 30m
2026-07-11 CSN6403 - Jul 11, 04:50 UTCJul 12, 01:25 UTC20h 35m
2026-07-11 CSN6403 - Jul 11, 04:10 UTCJul 12, 01:25 UTC21h 15m
2026-07-11 CSN6416 - Jul 11, 01:35 UTCJul 11, 04:50 UTC3h 15m
2026-07-09 CSN6403 - Jul 9, 01:00 UTCJul 9, 15:45 UTC14h 45m
2026-07-08 CSN6403 - Jul 8, 16:10 UTCJul 9, 07:35 UTC15h 25m
2026-07-08 CSN6304 - Jul 8, 13:40 UTCJul 8, 13:50 UTC10m
2026-07-08 CSN6303 - Jul 8, 01:25 UTCJul 8, 09:50 UTC8h 25m
2026-07-06 CSN6529 - Jul 6, 00:55 UTCJul 6, 01:40 UTC45m
2026-07-05 CSN6469 - Jul 5, 05:00 UTCJul 6, 01:40 UTC20h 40m
2026-07-04 CSN6469 - Jul 4, 13:15 UTCJul 5, 05:15 UTC16h 0m
2026-07-04 CSN6310 - Jul 4, 10:55 UTCJul 4, 11:10 UTC15m
2026-07-03 CSN6309 - Jul 3, 14:05 UTCJul 4, 06:10 UTC16h 5m
2026-07-02 CSN6456 - Jul 2, 16:00 UTCJul 3, 14:05 UTC22h 5m
2026-07-02 CSN6456 - Jul 2, 02:00 UTCJul 2, 16:10 UTC14h 10m
2026-07-01 CSN6340 CAN → SHE Jul 1, 06:20 UTCJul 2, 02:00 UTC19h 40m
2026-07-01 CSN6315 - Jul 1, 06:00 UTCJul 2, 02:00 UTC20h 0m
2026-06-30 CSN6315 - Jun 30, 13:30 UTCJul 1, 06:20 UTC16h 50m
2026-06-28 CSN6408 CSX → SHE Jun 28, 06:40 UTCJun 28, 06:49 UTC10m
2026-06-26 CSN672 - Jun 26, 12:50 UTCJun 26, 13:10 UTC20m
2026-06-26 CSN671 - Jun 26, 11:00 UTCJun 26, 11:20 UTC20m
2026-06-25 CSN6483 - Jun 25, 01:54 UTCJun 25, 08:04 UTC6h 10m
2026-06-23 CSN6483 - Jun 23, 02:04 UTCJun 23, 10:49 UTC8h 45m
2026-06-22 CSN6483 - Jun 22, 06:00 UTCJun 23, 02:24 UTC20h 25m
2026-06-21 CSN6380 CSX → SHE Jun 21, 15:40 UTCJun 22, 06:05 UTC14h 25m
2026-06-20 CSN6301 - Jun 20, 00:49 UTCJun 20, 07:54 UTC7h 5m
2026-06-19 CSN6301 - Jun 19, 06:04 UTCJun 20, 01:09 UTC19h 5m
2026-06-17 CSN6310 - Jun 17, 09:45 UTCJun 17, 09:55 UTC10m
2026-06-17 CSN6309 - Jun 17, 07:35 UTCJun 17, 07:55 UTC20m
2026-06-15 CSN6304 SZX → SHE Jun 15, 16:59 UTCJun 15, 17:20 UTC20m
2026-06-15 CSN6303 SHE → SZX Jun 15, 14:50 UTCJun 15, 15:00 UTC10m
2026-06-11 CSN6470 CKG → SHE Jun 11, 10:30 UTCJun 12, 02:50 UTC16h 20m
2026-06-11 CSN6469 SHE → CKG Jun 11, 04:50 UTCJun 12, 02:50 UTC22h 1m
2026-06-09 CSN6367 SHE → CAN Jun 9, 14:30 UTCJun 10, 02:55 UTC12h 25m

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-8673 page for operator, model, and routing details .

Mode-S 781099 frequently asked

What is Mode-S code 781099?
781099 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8673.
Where is Mode-S 781099 registered?
Mode-S code 781099 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781099 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781099, octal 36010231, decimal 7,868,569.
What flights does 781099 operate?
Mode-S 781099 has broadcast 20 distinct callsigns, including CSN6483, CSN6403, CSN6469, CSN6304, CSN5811.