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 1d ago
Flights observed
178
Distinct callsigns
20
Country
CN
Last broadcast
1d 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 - 7 2026-07-09
CHH702 - 5 2026-06-25
CHH450 - 5 2026-07-10
CHH429 - 5 2026-07-13
CHH7924 Hainan Airlines 4 2026-06-03
CHH7923 Hainan Airlines 4 2026-06-03
CHH7767 - 4 2026-07-05
CHH7312 Hainan Airlines 4 2026-04-17
CHH706 - 4 2026-07-11
CHH705 - 4 2026-07-11
CHH701 - 4 2026-06-25
CHH430 - 4 2026-07-13
CHH424 - 4 2026-06-19
CHH423 - 4 2026-06-19
CHH7771 - 3 2026-06-23
CHH7770 - 3 2026-07-07
CHH7769 - 3 2026-07-07
CHH7630 - 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CHH7367 - Jul 13, 13:35 UTCJul 13, 13:50 UTC15m
2026-07-13 CHH430 - Jul 13, 07:01 UTCJul 13, 08:40 UTC1h 40m
2026-07-13 CHH429 - Jul 13, 04:30 UTCJul 13, 04:45 UTC15m
2026-07-13 CHH429 - Jul 13, 00:20 UTCJul 13, 03:30 UTC3h 10m
2026-07-11 CHH706 - Jul 11, 13:40 UTCJul 11, 13:50 UTC10m
2026-07-11 CHH7915 - Jul 11, 04:45 UTCJul 11, 12:15 UTC7h 30m
2026-07-11 CHH7916 - Jul 11, 02:15 UTCJul 11, 02:30 UTC15m
2026-07-11 CHH705 - Jul 11, 00:30 UTCJul 11, 00:50 UTC20m
2026-07-10 CHH450 - Jul 10, 12:45 UTCJul 10, 15:40 UTC2h 55m
2026-07-09 CHH449 - Jul 9, 23:50 UTCJul 10, 11:20 UTC11h 30m
2026-07-09 CHH7777 - Jul 9, 06:20 UTCJul 9, 06:35 UTC15m
2026-07-09 CHH7138 - Jul 9, 03:40 UTCJul 9, 04:15 UTC35m
2026-07-08 CHH7237 - Jul 8, 03:35 UTCJul 8, 03:55 UTC20m
2026-07-07 CHH7702 - Jul 7, 23:35 UTCJul 7, 23:50 UTC15m
2026-07-07 CHH7770 - Jul 7, 13:30 UTCJul 7, 13:40 UTC10m
2026-07-07 CHH7630 - Jul 7, 08:45 UTCJul 7, 08:55 UTC10m
2026-07-07 CHH7629 - Jul 7, 04:15 UTCJul 7, 04:35 UTC20m
2026-07-07 CHH7769 - Jul 7, 00:15 UTCJul 7, 01:00 UTC45m
2026-07-06 CHH7396 - Jul 6, 14:50 UTCJul 6, 15:00 UTC10m
2026-07-05 CHH7767 - Jul 5, 23:50 UTCJul 6, 00:00 UTC10m
2026-07-05 CHH6206 - Jul 5, 16:40 UTCJul 5, 16:55 UTC15m
2026-07-04 CHH7763 - Jul 4, 22:40 UTCJul 4, 22:50 UTC10m
2026-07-04 CHH7392 - Jul 4, 17:30 UTCJul 4, 17:55 UTC25m
2026-07-04 CHH7767 - Jul 4, 01:45 UTCJul 4, 02:00 UTC15m
2026-07-03 CHH7734 - Jul 3, 22:50 UTCJul 3, 23:10 UTC20m
2026-07-03 CHH7770 - Jul 3, 12:55 UTCJul 3, 13:05 UTC10m
2026-07-03 CHH7630 - Jul 3, 08:30 UTCJul 3, 08:40 UTC10m
2026-07-03 CHH7769 - Jul 3, 00:00 UTCJul 3, 00:10 UTC10m
2026-07-02 CHH7774 KWE → SZX Jul 2, 18:40 UTCJul 2, 18:50 UTC10m
2026-07-02 CHH7773 - Jul 2, 14:45 UTCJul 2, 14:55 UTC10m
2026-07-02 CHH7396 - Jul 2, 13:00 UTCJul 2, 13:10 UTC10m
2026-07-02 CHH7395 - Jul 2, 06:51 UTCJul 2, 07:00 UTC9m
2026-07-01 CHH7767 - Jul 1, 23:55 UTCJul 2, 01:00 UTC1h 5m
2026-07-01 CHH7734 - Jul 1, 17:50 UTCJul 1, 18:10 UTC20m
2026-07-01 CHH7733 - Jul 1, 12:55 UTCJul 1, 13:05 UTC10m
2026-07-01 CHH7770 - Jul 1, 10:15 UTCJul 1, 10:35 UTC20m
2026-07-01 CHH7630 - Jul 1, 05:45 UTCJul 1, 05:55 UTC10m
2026-07-01 CHH7629 - Jul 1, 04:00 UTCJul 1, 04:10 UTC10m
2026-07-01 CHH7769 - Jul 1, 00:00 UTCJul 1, 00:15 UTC15m
2026-06-30 CHH7715 - Jun 30, 18:30 UTCJun 30, 18:55 UTC25m
2026-06-30 CHH7715 - Jun 30, 15:50 UTCJun 30, 16:05 UTC15m
2026-06-30 CHH7235 - Jun 30, 03:05 UTCJun 30, 03:25 UTC20m
2026-06-29 CHH7377 PEK → HGH Jun 29, 14:54 UTCJun 29, 15:04 UTC10m
2026-06-28 CHH448 - Jun 28, 05:20 UTCJun 28, 05:34 UTC15m
2026-06-27 CHH448 - Jun 27, 20:49 UTCJun 27, 23:29 UTC2h 40m
2026-06-27 CHH7909 HAK → SIN Jun 27, 18:09 UTCJun 27, 18:39 UTC30m
2026-06-26 CHH7910 - Jun 26, 20:59 UTCJun 26, 21:30 UTC30m
2026-06-26 CHH447 - Jun 26, 06:09 UTCJun 26, 19:00 UTC12h 50m
2026-06-25 CHH702 - Jun 25, 12:50 UTCJun 25, 16:35 UTC3h 45m
2026-06-25 CHH701 - Jun 25, 10:59 UTCJun 25, 11:15 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 1d 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, CHH702, CHH450.