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 6h ago
Flights observed
60
Distinct callsigns
15
Country
CN
Last broadcast
6h 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 15 distinct

Callsign Airline Flights Last seen
CHH7022 - 21 2026-07-14
CHH7021 - 15 2026-07-09
CHH7045 - 5 2026-07-07
CHH7061 - 4 2026-07-05
CHH7418 Hainan Airlines 2 2026-05-28
CHH7116 - 2 2026-06-27
CHH7093 Hainan Airlines 2 2026-06-26
CHH7064 Hainan Airlines 2 2026-06-02
CHH7094 Hainan Airlines 1 2026-06-26
CHH7088 Hainan Airlines 1 2026-06-24
CHH7086 Hainan Airlines 1 2026-06-13
CHH7075 - 1 2026-06-26
CHH7063 Hainan Airlines 1 2026-06-25
CHH7056 - 1 2026-06-21
CHH7042 Hainan Airlines 1 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CHH7022 - Jul 14, 01:15 UTCJul 14, 01:25 UTC10m
2026-07-10 CHH7022 - Jul 10, 04:20 UTCJul 10, 04:30 UTC10m
2026-07-09 CHH7021 - Jul 9, 23:30 UTCJul 9, 23:50 UTC20m
2026-07-07 CHH7045 - Jul 7, 07:35 UTCJul 7, 07:50 UTC15m
2026-07-05 CHH7061 - Jul 5, 06:45 UTCJul 5, 14:35 UTC7h 50m
2026-07-04 CHH7061 - Jul 4, 16:55 UTCJul 5, 14:35 UTC21h 40m
2026-06-27 CHH7116 - Jun 27, 16:10 UTCJun 28, 06:49 UTC14h 40m
2026-06-26 CHH7094 KMG → HAK Jun 26, 11:09 UTCJun 26, 11:30 UTC20m
2026-06-26 CHH7093 HAK → KMG Jun 26, 06:45 UTCJun 26, 06:54 UTC10m
2026-06-26 CHH7075 - Jun 26, 00:35 UTCJun 26, 04:14 UTC3h 40m
2026-06-25 CHH7063 HAK → WUH Jun 25, 05:15 UTCJun 25, 16:24 UTC11h 10m
2026-06-25 CHH7022 CAN → SYX Jun 25, 01:24 UTCJun 25, 01:35 UTC10m
2026-06-24 CHH7021 - Jun 24, 23:10 UTCJun 24, 23:24 UTC15m
2026-06-24 CHH7088 TFU → HAK Jun 24, 01:34 UTCJun 24, 05:59 UTC4h 25m
2026-06-21 CHH7056 - Jun 21, 09:00 UTCJun 21, 13:50 UTC4h 50m
2026-06-19 CHH7022 CAN → SYX Jun 19, 03:05 UTCJun 19, 03:20 UTC15m
2026-06-18 CHH7021 - Jun 18, 23:45 UTCJun 19, 00:14 UTC29m
2026-06-14 CHH7021 - Jun 14, 23:15 UTCJun 14, 23:29 UTC15m
2026-06-14 CHH7022 CAN → SYX Jun 14, 01:00 UTCJun 14, 01:15 UTC15m
2026-06-13 CHH7021 - Jun 13, 23:20 UTCJun 13, 23:30 UTC10m
2026-06-13 CHH7086 TFU → HAK Jun 13, 05:10 UTCJun 13, 09:35 UTC4h 25m
2026-06-12 CHH7093 HAK → KMG Jun 12, 06:45 UTCJun 12, 10:35 UTC3h 50m
2026-06-06 CHH7045 ZUH → TYN Jun 6, 05:40 UTCJun 6, 05:55 UTC15m
2026-06-04 CHH7045 ZUH → TYN Jun 4, 08:15 UTCJun 4, 08:25 UTC10m
2026-06-02 CHH7064 WUH → HAK Jun 2, 16:00 UTCJun 2, 16:10 UTC10m
2026-05-31 CHH7064 WUH → HAK May 31, 16:00 UTCMay 31, 16:10 UTC10m
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

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 6h 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 15 distinct callsigns, including CHH7022, CHH7021, CHH7045, CHH7061, CHH7418.