Apparatus

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sensors Mode-S transponder

78235D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-228A · BOEING 737 MAX 8

Hex
78235D
Octal
36021535
Decimal
7,873,373
Country
CN
Tail
B-228A
Type
B38M
No current signal · last broadcast 4h ago
Flights observed
81
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 78235D.

Country allocation

The ICAO 24-bit address 78235D 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
CHH756 Hainan Airlines 7 2026-05-28
CHH755 Hainan Airlines 7 2026-05-28
CHH449 Hainan Airlines 5 2026-05-29
CHH7312 Hainan Airlines 4 2026-04-17
CHH706 Hainan Airlines 3 2026-05-30
CHH705 Hainan Airlines 3 2026-05-30
CHH450 Hainan Airlines 3 2026-05-29
CHH429 Hainan Airlines 3 2026-04-24
CHH7384 Hainan Airlines 2 2026-04-15
CHH7383 Hainan Airlines 2 2026-04-15
CHH7377 Hainan Airlines 2 2026-05-17
CHH702 Hainan Airlines 2 2026-05-26
CHH498 Hainan Airlines 2 2026-05-10
CHH497 Hainan Airlines 2 2026-05-10
CHH430 Hainan Airlines 2 2026-04-24
CHH7924 Hainan Airlines 1 2026-05-16
CHH7923 Hainan Airlines 1 2026-05-16
CHH780 Hainan Airlines 1 2026-04-30
CHH779 Hainan Airlines 1 2026-04-30
CHH7771 - 1 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CHH706 HKG → HAK May 30, 02:20 UTCMay 30, 02:35 UTC15m
2026-05-30 CHH705 HAK → HKG May 30, 00:30 UTCMay 30, 00:35 UTC5m
2026-05-29 CHH450 ICN → HAK May 29, 12:35 UTCMay 29, 15:35 UTC3h 0m
2026-05-29 CHH449 HAK → ICN May 29, 01:25 UTCMay 29, 11:20 UTC9h 55m
2026-05-28 CHH449 HAK → ICN May 28, 15:55 UTCMay 29, 11:20 UTC19h 25m
2026-05-28 CHH756 KUL → HAK May 28, 13:15 UTCMay 28, 13:30 UTC15m
2026-05-28 CHH755 HAK → KUL May 28, 11:10 UTCMay 28, 11:40 UTC30m
2026-05-27 CHH7088 TFU → HAK May 27, 13:45 UTCMay 28, 06:05 UTC16h 20m
2026-05-26 CHH702 CGK → HAK May 26, 12:20 UTCMay 26, 13:50 UTC1h 30m
2026-05-26 CHH7482 PEK → HAK May 26, 01:24 UTCMay 26, 01:40 UTC15m
2026-05-24 CHH7055 HAK → HGH May 24, 10:55 UTCMay 24, 16:10 UTC5h 15m
2026-05-23 CHH720 HKG → HAK May 23, 08:20 UTCMay 23, 08:30 UTC10m
2026-05-23 CHH719 HAK → HKG May 23, 06:20 UTCMay 23, 06:35 UTC15m
2026-05-23 CHH706 HKG → HAK May 23, 02:25 UTCMay 23, 02:40 UTC14m
2026-05-23 CHH705 HAK → HKG May 23, 00:15 UTCMay 23, 00:35 UTC20m
2026-05-22 CHH450 ICN → HAK May 22, 12:40 UTCMay 22, 15:45 UTC3h 5m
2026-05-22 CHH449 HAK → ICN May 22, 10:45 UTCMay 22, 11:05 UTC20m
2026-05-22 CHH449 HAK → ICN May 22, 08:10 UTCMay 22, 08:20 UTC10m
2026-05-21 CHH7024 NKG → SYX May 21, 07:10 UTCMay 21, 07:30 UTC20m
2026-05-20 CHH7182 PEK → HAK May 20, 05:20 UTCMay 20, 05:40 UTC20m
2026-05-19 CHH756 KUL → HAK May 19, 13:30 UTCMay 19, 13:45 UTC15m
2026-05-19 CHH755 HAK → KUL May 19, 11:15 UTCMay 19, 11:35 UTC20m
2026-05-18 CHH7082 PEK → HAK May 18, 11:20 UTCMay 18, 11:40 UTC20m
2026-05-18 CHH7235 CAN → CGO May 18, 03:05 UTCMay 18, 03:25 UTC20m
2026-05-17 CHH7377 PEK → HGH May 17, 15:10 UTCMay 17, 15:20 UTC10m
2026-05-16 CHH7924 KUL → CKG May 16, 06:20 UTCMay 16, 06:41 UTC20m
2026-05-16 CHH7923 CKG → KUL May 16, 04:05 UTCMay 16, 04:35 UTC30m
2026-05-10 CHH756 KUL → HAK May 10, 13:14 UTCMay 10, 13:35 UTC20m
2026-05-10 CHH497 BAR → KUL May 10, 11:35 UTCMay 10, 12:05 UTC30m
2026-05-10 CHH498 KUL → BAR May 10, 04:45 UTCMay 10, 05:00 UTC15m
2026-05-10 CHH755 HAK → KUL May 10, 02:45 UTCMay 10, 03:10 UTC25m
2026-05-09 CHH706 HKG → HAK May 9, 02:20 UTCMay 9, 02:35 UTC15m
2026-05-09 CHH705 HAK → HKG May 9, 00:15 UTCMay 9, 00:25 UTC10m
2026-05-07 CHH702 CGK → HAK May 7, 12:30 UTCMay 8, 07:09 UTC18h 40m
2026-05-07 CHH701 HAK → CGK May 7, 10:20 UTCMay 7, 10:35 UTC15m
2026-05-06 CHH450 ICN → HAK May 6, 12:50 UTCMay 6, 15:50 UTC3h 0m
2026-05-06 CHH449 HAK → ICN May 6, 08:05 UTCMay 6, 11:05 UTC3h 0m
2026-05-05 CHH756 KUL → HAK May 5, 13:20 UTCMay 5, 13:35 UTC15m
2026-05-05 CHH755 HAK → KUL May 5, 11:10 UTCMay 5, 11:40 UTC30m
2026-05-03 CHH7074 HRB → HAK May 3, 02:35 UTCMay 3, 07:15 UTC4h 39m
2026-05-02 CHH7076 FOC → HAK May 2, 03:35 UTCMay 3, 02:50 UTC23h 15m
2026-05-02 CHH7075 HAK → KHN May 2, 00:45 UTCMay 2, 01:00 UTC15m
2026-05-01 CHH7073 HAK → HRB May 1, 02:20 UTCMay 1, 15:40 UTC13h 20m
2026-04-30 CHH780 HKG → HAK Apr 30, 13:15 UTCApr 30, 13:30 UTC15m
2026-04-30 CHH779 HAK → HKG Apr 30, 11:00 UTCApr 30, 11:05 UTC5m
2026-04-29 CHH7220 PVG → HAK Apr 29, 15:40 UTCApr 30, 08:00 UTC16h 19m
2026-04-28 CHH7648 SHE → HAK Apr 28, 11:15 UTCApr 28, 11:30 UTC15m
2026-04-27 CHH7367 PEK → CKG Apr 27, 13:25 UTCApr 27, 13:35 UTC10m
2026-04-26 CHH7397 SZX → HGH Apr 26, 15:10 UTCApr 26, 15:20 UTC10m
2026-04-26 CHH7771 - Apr 26, 08:10 UTCApr 26, 08:25 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-228A page for operator, model, and routing details .

Mode-S 78235D frequently asked

What is Mode-S code 78235D?
78235D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-228A.
Where is Mode-S 78235D registered?
Mode-S code 78235D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78235D broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78235D, octal 36021535, decimal 7,873,373.
What flights does 78235D operate?
Mode-S 78235D has broadcast 20 distinct callsigns, including CHH756, CHH755, CHH449, CHH7312, CHH706.