Apparatus

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sensors Mode-S transponder

7820BD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-225L · BOEING 737 MAX 8

Hex
7820BD
Octal
36020275
Decimal
7,872,701
Country
CN
Tail
B-225L
Type
B38M
No current signal · last broadcast Jul 26, 16:15 UTC
Flights observed
260
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 16:15 UTC

Last known position

Most recent position reported by Mode-S 7820BD.

Country allocation

The ICAO 24-bit address 7820BD 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
CSZ9916 - 14 2026-07-12
CSZ9146 - 13 2026-07-12
CSZ9145 - 9 2026-07-08
CSZ9637 - 8 2026-07-13
CSZ327 Shenzhen Airlines 8 2026-07-25
CSZ9138 Shenzhen Airlines 7 2026-07-17
CSZ9137 Shenzhen Airlines 7 2026-07-21
CSZ8594 - 7 2026-06-19
CSZ328 Shenzhen Airlines 7 2026-07-25
CSZ9604 Shenzhen Airlines 6 2026-07-19
CSZ9603 - 6 2026-07-19
CSZ9231 - 6 2026-07-21
CSZ9132 - 6 2026-07-08
CSZ9124 Shenzhen Airlines 6 2026-07-26
CSZ9918 Shenzhen Airlines 5 2026-07-23
CSZ9915 - 5 2026-07-11
CSZ9528 - 5 2026-07-17
CSZ9131 - 5 2026-07-08
CSZ156 - 5 2026-07-20
CSZ155 - 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSZ9124 PEK → CAN Jul 26, 16:00 UTCJul 26, 16:15 UTC15m
2026-07-25 CSZ328 KUL → SZX Jul 25, 10:15 UTCJul 25, 10:45 UTC30m
2026-07-25 CSZ328 KUL → SZX Jul 25, 05:25 UTCJul 25, 05:40 UTC15m
2026-07-25 CSZ327 SZX → KUL Jul 25, 03:25 UTCJul 25, 03:45 UTC20m
2026-07-25 CSZ327 SZX → KUL Jul 25, 00:25 UTCJul 25, 00:40 UTC15m
2026-07-24 CSZ8938 YIH → SZX Jul 24, 15:25 UTCJul 24, 15:40 UTC15m
2026-07-24 CSZ8937 SZX → YIH Jul 24, 11:25 UTCJul 24, 11:35 UTC10m
2026-07-24 CSZ240 SIN → SZX Jul 24, 09:20 UTCJul 24, 09:40 UTC20m
2026-07-24 CSZ240 SIN → SZX Jul 24, 05:50 UTCJul 24, 06:15 UTC25m
2026-07-24 CSZ239 SZX → SIN Jul 24, 03:40 UTCJul 24, 04:10 UTC30m
2026-07-24 CSZ239 SZX → SIN Jul 24, 00:50 UTCJul 24, 01:00 UTC10m
2026-07-23 CSZ9860 HGH → SZX Jul 23, 17:00 UTCJul 23, 17:20 UTC20m
2026-07-23 CSZ9853 SZX → NKG Jul 23, 12:25 UTCJul 23, 12:35 UTC10m
2026-07-23 CSZ9918 PVG → SZX Jul 23, 09:05 UTCJul 23, 09:50 UTC45m
2026-07-23 CSZ9917 SZX → SHA Jul 23, 02:05 UTCJul 23, 02:15 UTC10m
2026-07-22 CSZ9922 NTG → SZX Jul 22, 14:20 UTCJul 22, 15:25 UTC1h 5m
2026-07-21 CSZ9137 SZX → SJW Jul 21, 23:25 UTCJul 21, 23:35 UTC10m
2026-07-21 CSZ9128 HET → SZX Jul 21, 17:20 UTCJul 21, 17:40 UTC20m
2026-07-21 CSZ9127 SZX → HET Jul 21, 10:30 UTCJul 21, 10:40 UTC10m
2026-07-21 CSZ9231 - Jul 21, 01:40 UTCJul 21, 01:50 UTC10m
2026-07-20 CSZ8928 - Jul 20, 17:40 UTCJul 20, 18:00 UTC20m
2026-07-20 CSZ156 - Jul 20, 09:35 UTCJul 20, 09:50 UTC15m
2026-07-20 CSZ155 - Jul 20, 04:05 UTCJul 20, 04:15 UTC10m
2026-07-19 CSZ9604 SHE → SZX Jul 19, 19:30 UTCJul 19, 19:50 UTC20m
2026-07-19 CSZ9603 - Jul 19, 12:35 UTCJul 19, 17:15 UTC4h 40m
2026-07-19 CSZ9603 - Jul 19, 10:15 UTCJul 19, 10:25 UTC10m
2026-07-19 CSZ8106 BAV → SZX Jul 19, 08:35 UTCJul 19, 08:45 UTC10m
2026-07-19 CSZ8105 SZX → BAV Jul 19, 01:30 UTCJul 19, 06:10 UTC4h 40m
2026-07-18 CSZ8105 SZX → BAV Jul 18, 23:10 UTCJul 18, 23:20 UTC10m
2026-07-18 CSZ9124 - Jul 18, 15:40 UTCJul 18, 16:05 UTC25m
2026-07-18 CSZ9123 SZX → TYN Jul 18, 09:40 UTCJul 18, 09:50 UTC10m
2026-07-18 CSZ156 - Jul 18, 07:55 UTCJul 18, 08:10 UTC15m
2026-07-18 CSZ155 - Jul 18, 02:14 UTCJul 18, 02:25 UTC10m
2026-07-17 CSZ9528 - Jul 17, 13:45 UTCJul 17, 14:24 UTC40m
2026-07-17 CSZ9138 SJW → SZX Jul 17, 06:29 UTCJul 17, 06:45 UTC15m
2026-07-16 CSZ9137 - Jul 16, 23:40 UTCJul 16, 23:49 UTC10m
2026-07-16 CSZ8938 - Jul 16, 17:10 UTCJul 16, 17:35 UTC25m
2026-07-16 CSZ8937 - Jul 16, 11:10 UTCJul 16, 11:20 UTC10m
2026-07-16 CSZ9918 - Jul 16, 09:45 UTCJul 16, 09:55 UTC10m
2026-07-16 CSZ9917 - Jul 16, 02:30 UTCJul 16, 02:40 UTC10m
2026-07-15 CSZ9234 - Jul 15, 17:05 UTCJul 15, 17:15 UTC10m
2026-07-15 CSZ9233 - Jul 15, 10:05 UTCJul 15, 10:15 UTC10m
2026-07-15 CSZ9232 - Jul 15, 08:35 UTCJul 15, 08:45 UTC10m
2026-07-15 CSZ9231 - Jul 15, 01:15 UTCJul 15, 01:25 UTC10m
2026-07-14 CSZ8968 - Jul 14, 13:55 UTCJul 14, 14:35 UTC40m
2026-07-14 CSZ8967 - Jul 14, 09:50 UTCJul 14, 10:00 UTC10m
2026-07-14 CSZ9462 - Jul 14, 05:45 UTCJul 14, 06:00 UTC15m
2026-07-13 CSZ8928 - Jul 13, 16:25 UTCJul 13, 16:35 UTC10m
2026-07-13 CSZ9638 - Jul 13, 02:40 UTCJul 13, 10:00 UTC7h 20m
2026-07-13 CSZ9637 - Jul 13, 00:25 UTCJul 13, 00:40 UTC15m

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-225L page for operator, model, and routing details .

Mode-S 7820BD frequently asked

What is Mode-S code 7820BD?
7820BD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-225L.
Where is Mode-S 7820BD registered?
Mode-S code 7820BD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7820BD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7820BD, octal 36020275, decimal 7,872,701.
What flights does 7820BD operate?
Mode-S 7820BD has broadcast 20 distinct callsigns, including CSZ9916, CSZ9146, CSZ9145, CSZ9637, CSZ327.