Apparatus

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sensors Mode-S transponder

781953

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20ES · BOEING 737 MAX 8

Hex
781953
Octal
36014523
Decimal
7,870,803
Country
CN
Tail
B-20ES
Type
B38M
No current signal · last broadcast 10h ago
Flights observed
160
Distinct callsigns
20
Country
CN
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 781953.

Country allocation

The ICAO 24-bit address 781953 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
CSZ330 Shenzhen Airlines 21 2026-05-25
CSZ329 Shenzhen Airlines 19 2026-05-25
CSZ328 Shenzhen Airlines 8 2026-05-26
CSZ327 Shenzhen Airlines 8 2026-05-26
CSZ118 Shenzhen Airlines 7 2026-05-16
CSZ101 Shenzhen Airlines 7 2026-05-18
CSZ117 Shenzhen Airlines 5 2026-05-16
CSZ102 Shenzhen Airlines 5 2026-05-25
CSZ9922 Shenzhen Airlines 4 2026-05-22
CSZ9921 Shenzhen Airlines 4 2026-05-22
CSZ9912 Shenzhen Airlines 4 2026-05-22
CSZ156 Shenzhen Airlines 4 2026-05-27
CSZ9938 Shenzhen Airlines 3 2026-05-27
CSZ9937 Shenzhen Airlines 3 2026-05-27
CSZ9918 Shenzhen Airlines 3 2026-05-29
CSZ9911 Shenzhen Airlines 3 2026-05-15
CSZ9604 Shenzhen Airlines 3 2026-05-19
CSZ8919 Shenzhen Airlines 3 2026-05-08
CSZ155 - 3 2026-05-05
CSZ9917 Shenzhen Airlines 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSZ9853 SZX → NKG May 29, 14:35 UTCMay 29, 14:45 UTC10m
2026-05-29 CSZ9918 PVG → SZX May 29, 08:50 UTCMay 29, 09:45 UTC55m
2026-05-29 CSZ9917 SZX → SHA May 29, 02:10 UTCMay 29, 02:20 UTC10m
2026-05-28 CSZ9146 SJW → SZX May 28, 15:25 UTCMay 28, 15:40 UTC15m
2026-05-28 CSZ9145 SZX → SJW May 28, 09:15 UTCMay 28, 09:25 UTC10m
2026-05-28 CSZ9231 - May 28, 00:00 UTCMay 28, 00:15 UTC15m
2026-05-27 CSZ9938 CSX → SZX May 27, 16:10 UTCMay 27, 16:35 UTC25m
2026-05-27 CSZ9937 SZX → CSX May 27, 10:35 UTCMay 27, 10:45 UTC10m
2026-05-27 CSZ156 PNH → SZX May 27, 07:30 UTCMay 27, 07:45 UTC15m
2026-05-26 CSZ9468 CKG → SZX May 26, 16:15 UTCMay 26, 16:24 UTC10m
2026-05-26 CSZ9467 SZX → CKG May 26, 11:30 UTCMay 26, 11:39 UTC10m
2026-05-26 CSZ328 KUL → SZX May 26, 08:30 UTCMay 26, 08:45 UTC15m
2026-05-26 CSZ328 KUL → SZX May 26, 05:00 UTCMay 26, 05:25 UTC25m
2026-05-26 CSZ327 SZX → KUL May 26, 03:15 UTCMay 26, 03:35 UTC20m
2026-05-26 CSZ327 SZX → KUL May 26, 00:04 UTCMay 26, 00:14 UTC10m
2026-05-25 CSZ330 KUL → SZX May 25, 15:35 UTCMay 25, 15:50 UTC15m
2026-05-25 CSZ330 KUL → SZX May 25, 12:10 UTCMay 25, 12:35 UTC25m
2026-05-25 CSZ329 SZX → KUL May 25, 10:10 UTCMay 25, 10:35 UTC25m
2026-05-25 CSZ329 SZX → KUL May 25, 06:55 UTCMay 25, 07:05 UTC10m
2026-05-25 CSZ102 HAN → SZX May 25, 05:10 UTCMay 25, 05:20 UTC10m
2026-05-24 CSZ9852 PEK → SZX May 24, 14:35 UTCMay 24, 15:25 UTC50m
2026-05-24 CSZ8594 ZUH → NKG May 24, 03:50 UTCMay 24, 04:05 UTC15m
2026-05-23 CSZ328 KUL → SZX May 23, 08:55 UTCMay 23, 09:10 UTC15m
2026-05-23 CSZ328 KUL → SZX May 23, 05:15 UTCMay 23, 05:45 UTC30m
2026-05-23 CSZ327 SZX → KUL May 23, 03:40 UTCMay 23, 04:10 UTC30m
2026-05-22 CSZ9922 NTG → SZX May 22, 15:05 UTCMay 22, 15:30 UTC25m
2026-05-22 CSZ9921 SZX → NTG May 22, 07:40 UTCMay 22, 07:55 UTC15m
2026-05-22 CSZ9912 TAO → SZX May 22, 05:40 UTCMay 22, 06:00 UTC20m
2026-05-20 CSZ9138 SJW → SZX May 20, 07:25 UTCMay 20, 07:40 UTC15m
2026-05-19 CSZ9137 SZX → SJW May 19, 23:35 UTCMay 19, 23:45 UTC10m
2026-05-19 CSZ9604 SHE → SZX May 19, 16:30 UTCMay 19, 16:45 UTC15m
2026-05-19 CSZ9604 SHE → SZX May 19, 09:40 UTCMay 19, 13:55 UTC4h 15m
2026-05-19 CSZ9603 SZX → SHE May 19, 07:40 UTCMay 19, 07:50 UTC10m
2026-05-18 CSZ9137 SZX → SJW May 18, 23:20 UTCMay 18, 23:30 UTC10m
2026-05-18 CSZ330 KUL → SZX May 18, 15:35 UTCMay 18, 15:50 UTC15m
2026-05-18 CSZ330 KUL → SZX May 18, 12:00 UTCMay 18, 12:30 UTC30m
2026-05-18 CSZ329 SZX → KUL May 18, 10:10 UTCMay 18, 10:40 UTC30m
2026-05-18 CSZ329 SZX → KUL May 18, 07:10 UTCMay 18, 07:20 UTC10m
2026-05-18 CSZ101 SZX → HAN May 18, 00:50 UTCMay 18, 01:00 UTC10m
2026-05-17 CSZ330 KUL → SZX May 17, 16:10 UTCMay 17, 16:30 UTC20m
2026-05-17 CSZ330 KUL → SZX May 17, 12:50 UTCMay 17, 13:15 UTC25m
2026-05-17 CSZ329 SZX → KUL May 17, 11:01 UTCMay 17, 11:25 UTC25m
2026-05-17 CSZ101 SZX → HAN May 17, 00:55 UTCMay 17, 01:05 UTC10m
2026-05-16 CSZ118 SGN → SZX May 16, 22:05 UTCMay 16, 22:20 UTC15m
2026-05-16 CSZ117 SZX → SGN May 16, 16:25 UTCMay 16, 16:35 UTC10m
2026-05-16 CSZ9922 NTG → SZX May 16, 14:11 UTCMay 16, 14:31 UTC20m
2026-05-16 CSZ9921 SZX → NTG May 16, 07:55 UTCMay 16, 08:05 UTC10m
2026-05-16 CSZ9912 TAO → SZX May 16, 05:35 UTCMay 16, 06:01 UTC26m
2026-05-15 CSZ9911 SZX → TAO May 15, 23:05 UTCMay 15, 23:15 UTC10m
2026-05-15 CSZ330 KUL → SZX May 15, 17:40 UTCMay 15, 18:00 UTC20m

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-20ES page for operator, model, and routing details .

Mode-S 781953 frequently asked

What is Mode-S code 781953?
781953 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20ES.
Where is Mode-S 781953 registered?
Mode-S code 781953 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781953 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781953, octal 36014523, decimal 7,870,803.
What flights does 781953 operate?
Mode-S 781953 has broadcast 20 distinct callsigns, including CSZ330, CSZ329, CSZ328, CSZ327, CSZ118.