Apparatus

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sensors Mode-S transponder

78201B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-224G · BOEING 737 MAX 8

Hex
78201B
Octal
36020033
Decimal
7,872,539
Country
CN
Tail
B-224G
Type
B38M
No current signal · last broadcast 1d ago
Flights observed
34
Distinct callsigns
7
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 78201B.

Country allocation

The ICAO 24-bit address 78201B 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 7 distinct

Callsign Airline Flights Last seen
CHH7022 Hainan Airlines 16 2026-05-15
CHH7021 Hainan Airlines 10 2026-05-10
CHH7418 Hainan Airlines 2 2026-05-28
CHH7061 Hainan Airlines 2 2026-05-18
CHH7045 Hainan Airlines 2 2026-05-24
CHH7116 Hainan Airlines 1 2026-05-07
CHH7042 Hainan Airlines 1 2026-05-01

Recent flights last 34

DateFlightRouteTakeoffLandingDuration
2026-05-28 CHH7418 CSX → HAK May 28, 14:25 UTCMay 28, 14:35 UTC10m
2026-05-27 CHH7418 - May 27, 14:20 UTCMay 27, 14:30 UTC10m
2026-05-24 CHH7045 ZUH → TYN May 24, 05:20 UTCMay 24, 05:35 UTC15m
2026-05-20 CHH7045 ZUH → TYN May 20, 05:25 UTCMay 20, 05:40 UTC15m
2026-05-18 CHH7061 HAK → HGH May 18, 06:10 UTCMay 18, 06:25 UTC15m
2026-05-15 CHH7022 CAN → SYX May 15, 01:30 UTCMay 15, 01:45 UTC15m
2026-05-11 CHH7022 CAN → SYX May 11, 01:05 UTCMay 11, 01:15 UTC10m
2026-05-10 CHH7021 HAK → SZX May 10, 23:19 UTCMay 10, 23:35 UTC15m
2026-05-08 CHH7022 CAN → SYX May 8, 01:00 UTCMay 8, 01:14 UTC15m
2026-05-07 CHH7021 HAK → SZX May 7, 23:09 UTCMay 7, 23:24 UTC15m
2026-05-07 CHH7116 NKG → HAK May 7, 02:05 UTCMay 7, 07:00 UTC4h 55m
2026-05-05 CHH7022 CAN → SYX May 5, 01:40 UTCMay 5, 02:01 UTC20m
2026-05-04 CHH7021 HAK → SZX May 4, 23:05 UTCMay 4, 23:25 UTC20m
2026-05-03 CHH7022 CAN → SYX May 3, 01:10 UTCMay 3, 01:25 UTC15m
2026-05-02 CHH7022 CAN → SYX May 2, 01:00 UTCMay 2, 01:15 UTC15m
2026-05-01 CHH7021 HAK → SZX May 1, 23:15 UTCMay 1, 23:30 UTC15m
2026-05-01 CHH7042 HGH → HAK May 1, 07:35 UTCMay 1, 13:50 UTC6h 15m
2026-04-30 CHH7022 CAN → SYX Apr 30, 01:05 UTCApr 30, 01:15 UTC10m
2026-04-29 CHH7061 HAK → HGH Apr 29, 07:59 UTCApr 29, 08:10 UTC10m
2026-04-28 CHH7022 CAN → SYX Apr 28, 01:15 UTCApr 28, 01:25 UTC10m
2026-04-27 CHH7021 HAK → SZX Apr 27, 23:25 UTCApr 27, 23:40 UTC15m
2026-04-27 CHH7022 CAN → SYX Apr 27, 01:30 UTCApr 27, 01:50 UTC20m
2026-04-26 CHH7022 CAN → SYX Apr 26, 01:10 UTCApr 26, 01:25 UTC15m
2026-04-25 CHH7021 HAK → SZX Apr 25, 23:20 UTCApr 25, 23:30 UTC10m
2026-04-25 CHH7022 CAN → SYX Apr 25, 01:15 UTCApr 25, 01:30 UTC15m
2026-04-24 CHH7022 CAN → SYX Apr 24, 02:00 UTCApr 24, 02:20 UTC20m
2026-04-23 CHH7021 HAK → SZX Apr 23, 23:55 UTCApr 24, 00:10 UTC15m
2026-04-23 CHH7022 CAN → SYX Apr 23, 01:00 UTCApr 23, 01:15 UTC15m
2026-04-19 CHH7022 CAN → SYX Apr 19, 02:35 UTCApr 19, 02:55 UTC20m
2026-04-18 CHH7021 HAK → SZX Apr 18, 23:25 UTCApr 18, 23:35 UTC10m
2026-04-15 CHH7022 CAN → SYX Apr 15, 01:30 UTCApr 15, 01:50 UTC20m
2026-04-14 CHH7021 HAK → SZX Apr 14, 23:15 UTCApr 14, 23:30 UTC15m
2026-04-13 CHH7021 HAK → SZX Apr 13, 23:15 UTCApr 13, 23:30 UTC15m
2026-04-13 CHH7022 - Apr 13, 01:20 UTCApr 13, 01:30 UTC10m

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-224G page for operator, model, and routing details .

Mode-S 78201B frequently asked

What is Mode-S code 78201B?
78201B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-224G.
Where is Mode-S 78201B registered?
Mode-S code 78201B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78201B broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78201B, octal 36020033, decimal 7,872,539.
What flights does 78201B operate?
Mode-S 78201B has broadcast 7 distinct callsigns, including CHH7022, CHH7021, CHH7418, CHH7061, CHH7045.