Apparatus

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sensors Mode-S transponder

7803B6

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5401 · BOEING 737-800

Hex
7803B6
Octal
36001666
Decimal
7,865,270
Country
CN
Tail
B-5401
Type
B738
No current signal · last broadcast Jul 25, 23:55 UTC
Flights observed
137
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 23:55 UTC

Last known position

Most recent position reported by Mode-S 7803B6.

Country allocation

The ICAO 24-bit address 7803B6 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
CSZ9451 - 5 2026-07-19
CSZ8536 Shenzhen Airlines 5 2026-04-25
CSZ8662 - 4 2026-07-14
CSZ9886 - 3 2026-07-18
CSZ9469 Shenzhen Airlines 3 2026-05-05
CSZ9452 - 3 2026-07-19
CSZ9303 Shenzhen Airlines 3 2026-05-21
CSZ8933 - 3 2026-07-02
CSZ8665 - 3 2026-07-13
CSZ634 - 3 2026-07-13
CSZ633 - 3 2026-07-13
CSZ9957 Shenzhen Airlines 2 2026-05-29
CSZ9945 Shenzhen Airlines 2 2026-05-25
CSZ9922 - 2 2026-07-15
CSZ9920 Shenzhen Airlines 2 2026-07-20
CSZ9885 Shenzhen Airlines 2 2026-05-06
CSZ9803 - 2 2026-07-03
CSZ9530 - 2 2026-07-16
CSZ9520 Shenzhen Airlines 2 2026-05-27
CSZ9519 Shenzhen Airlines 2 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CSZ8373 CGO → CGQ Jul 25, 23:40 UTCJul 25, 23:55 UTC15m
2026-07-25 CSZ8374 CGQ → CGO Jul 25, 03:55 UTCJul 25, 04:15 UTC20m
2026-07-24 CSZ8373 CGO → CGQ Jul 24, 23:05 UTCJul 24, 23:45 UTC40m
2026-07-24 CSZ9368 FOC → NNG Jul 24, 11:45 UTCJul 24, 12:20 UTC35m
2026-07-24 CSZ9366 FOC → NNG Jul 24, 04:00 UTCJul 24, 09:00 UTC5h 0m
2026-07-24 CSZ9365 NNG → FOC Jul 24, 00:15 UTCJul 24, 00:25 UTC10m
2026-07-21 CSZ9918 - Jul 21, 09:00 UTCJul 21, 10:05 UTC1h 5m
2026-07-21 CSZ9917 SZX → SHA Jul 21, 03:30 UTCJul 21, 03:40 UTC10m
2026-07-20 CSZ9920 TAO → SZX Jul 20, 12:50 UTCJul 20, 14:05 UTC1h 15m
2026-07-20 CSZ9959 SZX → PEK Jul 20, 00:35 UTCJul 20, 00:50 UTC15m
2026-07-19 CSZ8918 - Jul 19, 09:20 UTCJul 19, 15:15 UTC5h 55m
2026-07-19 CSZ9452 - Jul 19, 06:25 UTCJul 19, 06:35 UTC10m
2026-07-19 CSZ9451 - Jul 19, 00:00 UTCJul 19, 00:15 UTC15m
2026-07-18 CSZ9411 - Jul 18, 12:30 UTCJul 18, 12:40 UTC10m
2026-07-18 CSZ9886 - Jul 18, 09:10 UTCJul 18, 09:25 UTC15m
2026-07-17 CSZ9458 - Jul 17, 13:55 UTCJul 17, 14:04 UTC10m
2026-07-17 CSZ8932 - Jul 17, 04:39 UTCJul 17, 04:49 UTC10m
2026-07-16 CSZ8931 - Jul 16, 23:59 UTCJul 17, 00:10 UTC10m
2026-07-16 CSZ9530 - Jul 16, 15:00 UTCJul 16, 15:40 UTC40m
2026-07-16 CSZ9302 - Jul 16, 08:50 UTCJul 16, 09:00 UTC10m
2026-07-16 CSZ9301 - Jul 16, 01:45 UTCJul 16, 01:55 UTC10m
2026-07-15 CSZ9922 - Jul 15, 15:55 UTCJul 15, 16:35 UTC40m
2026-07-15 CSZ9451 - Jul 15, 00:45 UTCJul 15, 01:05 UTC20m
2026-07-14 CSZ8662 - Jul 14, 16:05 UTCJul 14, 16:50 UTC45m
2026-07-13 CSZ8665 - Jul 13, 13:05 UTCJul 13, 13:15 UTC10m
2026-07-13 CSZ634 - Jul 13, 09:45 UTCJul 13, 09:55 UTC10m
2026-07-13 CSZ634 - Jul 13, 06:35 UTCJul 13, 07:20 UTC45m
2026-07-13 CSZ633 - Jul 13, 04:25 UTCJul 13, 05:10 UTC45m
2026-07-12 CSZ9233 - Jul 12, 07:31 UTCJul 12, 07:40 UTC10m
2026-07-12 CSZ9451 - Jul 12, 00:05 UTCJul 12, 00:20 UTC15m
2026-07-11 CSZ9453 - Jul 11, 01:45 UTCJul 11, 02:00 UTC15m
2026-07-10 CSZ9949 - Jul 10, 13:35 UTCJul 10, 13:45 UTC10m
2026-07-10 CSZ9130 - Jul 10, 10:50 UTCJul 10, 11:10 UTC20m
2026-07-10 CSZ9129 - Jul 10, 03:35 UTCJul 10, 03:45 UTC10m
2026-07-09 CSZ9128 - Jul 9, 16:40 UTCJul 9, 16:50 UTC10m
2026-07-09 CSZ9127 - Jul 9, 08:50 UTCJul 9, 09:00 UTC10m
2026-07-09 CSZ9231 - Jul 9, 00:10 UTCJul 9, 00:20 UTC10m
2026-07-08 CSZ9466 - Jul 8, 17:45 UTCJul 8, 18:00 UTC15m
2026-07-08 CSZ9465 - Jul 8, 09:05 UTCJul 8, 09:15 UTC10m
2026-07-08 CSZ9916 - Jul 8, 06:35 UTCJul 8, 07:45 UTC1h 10m
2026-07-07 CSZ9915 - Jul 7, 23:50 UTCJul 8, 00:00 UTC10m
2026-07-07 CSZ9806 - Jul 7, 17:30 UTCJul 7, 18:10 UTC40m
2026-07-06 CSZ8538 - Jul 6, 04:35 UTCJul 6, 04:50 UTC15m
2026-07-06 CSZ8537 - Jul 6, 02:55 UTCJul 6, 03:10 UTC15m
2026-07-04 CSZ122 - Jul 4, 09:30 UTCJul 4, 09:55 UTC25m
2026-07-04 CSZ121 - Jul 4, 06:25 UTCJul 4, 07:25 UTC1h 0m
2026-07-03 CSZ9803 - Jul 3, 01:05 UTCJul 3, 01:45 UTC40m
2026-07-02 CSZ8934 - Jul 2, 19:10 UTCJul 2, 19:35 UTC25m
2026-07-02 CSZ8933 - Jul 2, 12:05 UTCJul 2, 12:20 UTC15m
2026-07-02 CSZ634 - Jul 2, 06:41 UTCJul 2, 07:30 UTC49m

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-5401 page for operator, model, and routing details .

Mode-S 7803B6 frequently asked

What is Mode-S code 7803B6?
7803B6 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5401.
Where is Mode-S 7803B6 registered?
Mode-S code 7803B6 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7803B6 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 23:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7803B6, octal 36001666, decimal 7,865,270.
What flights does 7803B6 operate?
Mode-S 7803B6 has broadcast 20 distinct callsigns, including CSZ9451, CSZ8536, CSZ8662, CSZ9886, CSZ9469.