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 Jul 25, 15:00 UTC
Flights observed
196
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 15:00 UTC

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
CHH449 - 10 2026-07-22
CHH702 Hainan Airlines 8 2026-07-21
CHH450 - 8 2026-07-22
CHH756 Hainan Airlines 7 2026-05-28
CHH755 Hainan Airlines 7 2026-05-28
CHH701 Hainan Airlines 6 2026-07-21
CHH706 Hainan Airlines 5 2026-07-25
CHH705 Hainan Airlines 5 2026-07-25
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
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
2026-07-25 CHH706 HKG → HAK Jul 25, 14:45 UTCJul 25, 15:00 UTC15m
2026-07-25 CHH7915 CGQ → HKG Jul 25, 05:10 UTCJul 25, 12:55 UTC7h 45m
2026-07-25 CHH7916 HKG → CGQ Jul 25, 02:55 UTCJul 25, 03:10 UTC15m
2026-07-25 CHH705 HAK → HKG Jul 25, 00:45 UTCJul 25, 00:50 UTC5m
2026-07-22 CHH450 - Jul 22, 15:30 UTCJul 23, 10:55 UTC19h 25m
2026-07-22 CHH450 - Jul 22, 14:50 UTCJul 23, 10:55 UTC20h 5m
2026-07-22 CHH449 - Jul 22, 12:30 UTCJul 22, 13:15 UTC45m
2026-07-21 CHH702 CGK → HAK Jul 21, 13:20 UTCJul 22, 13:15 UTC23h 55m
2026-07-21 CHH702 CGK → HAK Jul 21, 12:35 UTCJul 21, 14:05 UTC1h 30m
2026-07-21 CHH701 HAK → CGK Jul 21, 10:30 UTCJul 21, 10:40 UTC10m
2026-07-21 CHH7482 PEK → HAK Jul 21, 01:30 UTCJul 21, 01:50 UTC20m
2026-07-18 CHH450 - Jul 18, 12:45 UTCJul 19, 08:05 UTC19h 20m
2026-07-18 CHH449 - Jul 18, 08:10 UTCJul 18, 11:10 UTC3h 0m
2026-07-17 CHH449 - Jul 17, 13:35 UTCJul 18, 11:10 UTC21h 36m
2026-07-17 CHH702 - Jul 17, 13:00 UTCJul 18, 11:10 UTC22h 11m
2026-07-17 CHH701 - Jul 17, 11:10 UTCJul 17, 11:25 UTC15m
2026-07-16 CHH7076 - Jul 16, 11:25 UTCJul 17, 05:15 UTC17h 50m
2026-07-16 CHH7238 - Jul 16, 03:25 UTCJul 16, 09:10 UTC5h 45m
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

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 Jul 25, 15:00 UTC.
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 CHH449, CHH702, CHH450, CHH756, CHH755.