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
Broadcasting now · callsign CSZ9855 · 18,425 ft
Flights observed
363
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 13:20 UTC

Current position

781953 is currently broadcasting. Map zoomed to live position.

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 41 2026-07-26
CSZ329 Shenzhen Airlines 40 2026-07-26
CSZ327 - 26 2026-07-18
CSZ328 - 25 2026-07-18
CSZ101 Shenzhen Airlines 21 2026-07-25
CSZ102 Shenzhen Airlines 18 2026-07-25
CSZ118 - 10 2026-07-14
CSZ117 - 7 2026-07-14
CSZ9922 Shenzhen Airlines 6 2026-06-21
CSZ9852 - 6 2026-07-07
CSZ9637 - 6 2026-07-16
CSZ9604 Shenzhen Airlines 6 2026-07-18
CSZ156 Shenzhen Airlines 6 2026-07-24
CSZ9938 - 5 2026-07-15
CSZ9921 - 5 2026-06-21
CSZ9918 - 5 2026-07-08
CSZ9916 - 5 2026-07-09
CSZ9145 - 5 2026-07-09
CSZ8919 - 5 2026-07-17
CSZ9937 - 4 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSZ330 KUL → SZX Jul 26, 12:50 UTCJul 26, 13:20 UTC30m
2026-07-26 CSZ329 SZX → KUL Jul 26, 11:00 UTCJul 26, 11:30 UTC30m
2026-07-25 CSZ330 KUL → SZX Jul 25, 15:45 UTCJul 25, 16:00 UTC15m
2026-07-25 CSZ330 KUL → SZX Jul 25, 12:20 UTCJul 25, 12:45 UTC25m
2026-07-25 CSZ329 SZX → KUL Jul 25, 10:00 UTCJul 25, 10:25 UTC25m
2026-07-25 CSZ329 SZX → KUL Jul 25, 07:00 UTCJul 25, 07:10 UTC10m
2026-07-25 CSZ102 HAN → SZX Jul 25, 04:25 UTCJul 25, 04:35 UTC10m
2026-07-25 CSZ101 SZX → HAN Jul 25, 02:25 UTCJul 25, 02:45 UTC20m
2026-07-25 CSZ101 SZX → HAN Jul 25, 01:30 UTCJul 25, 01:40 UTC10m
2026-07-24 CSZ9124 PEK → CAN Jul 24, 15:35 UTCJul 24, 15:55 UTC20m
2026-07-24 CSZ9123 SZX → TYN Jul 24, 09:35 UTCJul 24, 09:45 UTC10m
2026-07-24 CSZ156 PNH → SZX Jul 24, 07:30 UTCJul 24, 07:45 UTC15m
2026-07-23 CSZ330 KUL → SZX Jul 23, 12:00 UTCJul 23, 12:25 UTC25m
2026-07-23 CSZ329 SZX → KUL Jul 23, 10:05 UTCJul 23, 10:30 UTC25m
2026-07-23 CSZ329 SZX → KUL Jul 23, 07:00 UTCJul 23, 07:10 UTC10m
2026-07-23 CSZ102 HAN → SZX Jul 23, 04:10 UTCJul 23, 04:20 UTC10m
2026-07-23 CSZ101 SZX → HAN Jul 23, 00:55 UTCJul 23, 01:05 UTC10m
2026-07-22 CSZ330 KUL → SZX Jul 22, 17:55 UTCJul 22, 18:15 UTC20m
2026-07-22 CSZ330 KUL → SZX Jul 22, 14:25 UTCJul 22, 14:55 UTC30m
2026-07-22 CSZ329 SZX → KUL Jul 22, 11:50 UTCJul 22, 12:20 UTC30m
2026-07-22 CSZ101 SZX → HAN Jul 22, 02:30 UTCJul 22, 02:40 UTC10m
2026-07-21 CSZ9528 PVG → SZX Jul 21, 17:10 UTCJul 21, 18:15 UTC1h 5m
2026-07-21 CSZ9527 SZX → PVG Jul 21, 09:55 UTCJul 21, 10:05 UTC10m
2026-07-21 CSZ9212 - Jul 21, 05:55 UTCJul 21, 06:05 UTC10m
2026-07-21 CSZ9211 SZX → XIY Jul 21, 00:10 UTCJul 21, 00:20 UTC10m
2026-07-20 CSZ9521 - Jul 20, 07:45 UTCJul 20, 07:55 UTC10m
2026-07-20 CSZ9944 - Jul 20, 06:05 UTCJul 20, 06:15 UTC10m
2026-07-20 CSZ9943 - Jul 20, 01:00 UTCJul 20, 01:15 UTC15m
2026-07-19 CSZ330 KUL → SZX Jul 19, 15:30 UTCJul 19, 15:45 UTC15m
2026-07-19 CSZ330 KUL → SZX Jul 19, 12:10 UTCJul 19, 12:35 UTC25m
2026-07-19 CSZ329 - Jul 19, 10:10 UTCJul 19, 10:35 UTC25m
2026-07-19 CSZ329 - Jul 19, 07:10 UTCJul 19, 07:20 UTC10m
2026-07-19 CSZ102 - Jul 19, 04:10 UTCJul 19, 04:20 UTC10m
2026-07-19 CSZ101 SZX → HAN Jul 19, 01:25 UTCJul 19, 01:35 UTC10m
2026-07-18 CSZ9604 SHE → SZX Jul 18, 18:50 UTCJul 18, 19:10 UTC20m
2026-07-18 CSZ9604 SHE → SZX Jul 18, 13:25 UTCJul 18, 16:40 UTC3h 15m
2026-07-18 CSZ9603 - Jul 18, 11:10 UTCJul 18, 11:20 UTC10m
2026-07-18 CSZ328 - Jul 18, 08:35 UTCJul 18, 08:55 UTC20m
2026-07-18 CSZ328 - Jul 18, 05:05 UTCJul 18, 05:30 UTC25m
2026-07-18 CSZ327 - Jul 18, 03:25 UTCJul 18, 03:45 UTC20m
2026-07-18 CSZ327 - Jul 18, 00:19 UTCJul 18, 00:35 UTC15m
2026-07-17 CSZ9124 - Jul 17, 15:49 UTCJul 17, 16:04 UTC15m
2026-07-17 CSZ9123 - Jul 17, 10:10 UTCJul 17, 10:20 UTC10m
2026-07-17 CSZ8920 - Jul 17, 07:25 UTCJul 17, 07:44 UTC20m
2026-07-17 CSZ8919 - Jul 17, 00:25 UTCJul 17, 00:35 UTC10m
2026-07-16 CSZ9860 - Jul 16, 17:35 UTCJul 16, 18:15 UTC40m
2026-07-16 CSZ9638 - Jul 16, 09:55 UTCJul 16, 10:25 UTC30m
2026-07-16 CSZ9637 - Jul 16, 03:40 UTCJul 16, 07:45 UTC4h 5m
2026-07-16 CSZ9637 - Jul 16, 01:15 UTCJul 16, 01:30 UTC15m
2026-07-15 CSZ9938 - Jul 15, 18:25 UTCJul 15, 19:05 UTC40m

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?
Yes. Mode-S 781953 is currently airborne.
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, CSZ327, CSZ328, CSZ101.