Apparatus

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sensors Mode-S transponder

7820FD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-225X · BOEING 737 MAX 8

Hex
7820FD
Octal
36020375
Decimal
7,872,765
Country
CN
Tail
B-225X
Type
B38M
No current signal · last broadcast 12d ago
Flights observed
172
Distinct callsigns
20
Country
CN
Last broadcast
12d ago

Last known position

Most recent position reported by Mode-S 7820FD.

Country allocation

The ICAO 24-bit address 7820FD 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 - 9 2026-06-23
CHH755 - 9 2026-06-23
CHH447 - 8 2026-07-01
CHH7396 - 7 2026-07-18
CHH702 - 7 2026-07-05
CHH7767 - 6 2026-07-18
CHH701 - 6 2026-07-05
CHH430 Hainan Airlines 6 2026-07-23
CHH7909 Hainan Airlines 5 2026-07-02
CHH7772 - 5 2026-07-10
CHH7395 - 5 2026-07-18
CHH450 - 5 2026-06-27
CHH7923 Hainan Airlines 4 2026-07-26
CHH7771 - 4 2026-07-10
CHH7763 - 4 2026-07-09
CHH448 - 4 2026-07-02
CHH429 Hainan Airlines 4 2026-07-23
CHH7770 - 3 2026-07-21
CHH7769 - 3 2026-07-21
CHH7768 - 3 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH7924 KUL → CKG Jul 26, 06:35 UTCJul 26, 09:40 UTC3h 5m
2026-07-26 CHH7923 CKG → KUL Jul 26, 04:00 UTCJul 26, 04:15 UTC15m
2026-07-26 CHH7923 CKG → KUL Jul 26, 01:10 UTCJul 26, 01:35 UTC25m
2026-07-23 CHH7367 - Jul 23, 13:55 UTCJul 23, 14:15 UTC20m
2026-07-23 CHH430 BKK → PEK Jul 23, 11:35 UTCJul 23, 11:45 UTC10m
2026-07-23 CHH430 BKK → PEK Jul 23, 07:10 UTCJul 23, 08:45 UTC1h 35m
2026-07-23 CHH429 PEK → BKK Jul 23, 00:40 UTCJul 23, 05:10 UTC4h 30m
2026-07-22 CHH7477 - Jul 22, 04:35 UTCJul 22, 04:45 UTC10m
2026-07-22 CHH7478 HGH → PEK Jul 22, 02:15 UTCJul 22, 02:40 UTC25m
2026-07-21 CHH7397 - Jul 21, 15:55 UTCJul 21, 16:05 UTC10m
2026-07-21 CHH7770 - Jul 21, 13:00 UTCJul 21, 13:20 UTC20m
2026-07-21 CHH7630 - Jul 21, 06:50 UTCJul 21, 07:00 UTC10m
2026-07-21 CHH7629 XNT → HRB Jul 21, 04:25 UTCJul 21, 04:50 UTC25m
2026-07-21 CHH7769 - Jul 21, 00:10 UTCJul 21, 00:45 UTC35m
2026-07-20 CHH7734 CGO → SZX Jul 20, 19:10 UTCJul 20, 19:35 UTC25m
2026-07-20 CHH7733 - Jul 20, 14:05 UTCJul 20, 14:15 UTC10m
2026-07-20 CHH7770 - Jul 20, 12:20 UTCJul 20, 12:45 UTC25m
2026-07-20 CHH7630 - Jul 20, 05:45 UTCJul 20, 05:55 UTC10m
2026-07-20 CHH7769 - Jul 20, 00:15 UTCJul 20, 00:25 UTC10m
2026-07-19 CHH7924 - Jul 19, 06:35 UTCJul 19, 09:35 UTC3h 0m
2026-07-19 CHH7923 - Jul 19, 03:55 UTCJul 19, 04:10 UTC15m
2026-07-19 CHH7923 - Jul 19, 01:15 UTCJul 19, 01:35 UTC20m
2026-07-18 CHH7557 - Jul 18, 14:35 UTCJul 18, 14:45 UTC10m
2026-07-18 CHH7396 - Jul 18, 11:05 UTCJul 18, 11:45 UTC40m
2026-07-18 CHH7395 - Jul 18, 06:30 UTCJul 18, 06:45 UTC15m
2026-07-18 CHH7768 - Jul 18, 05:00 UTCJul 18, 05:10 UTC10m
2026-07-18 CHH7767 - Jul 18, 00:00 UTCJul 18, 00:10 UTC10m
2026-07-17 CHH6206 - Jul 17, 14:24 UTCJul 17, 15:15 UTC50m
2026-07-17 CHH6205 - Jul 17, 09:45 UTCJul 17, 09:55 UTC10m
2026-07-16 CHH7870 SZX → XIY Jul 16, 23:55 UTCJul 17, 00:10 UTC15m
2026-07-16 CHH7396 - Jul 16, 12:25 UTCJul 16, 13:05 UTC40m
2026-07-16 CHH7767 - Jul 16, 00:15 UTCJul 16, 00:25 UTC10m
2026-07-15 CHH6206 - Jul 15, 16:35 UTCJul 15, 17:20 UTC45m
2026-07-15 CHH6205 - Jul 15, 11:50 UTCJul 15, 12:00 UTC10m
2026-07-15 CHH7156 - Jul 15, 08:00 UTCJul 15, 08:50 UTC50m
2026-07-15 CHH7155 - Jul 15, 03:10 UTCJul 15, 03:20 UTC10m
2026-07-14 CHH7398 - Jul 14, 23:40 UTCJul 15, 00:50 UTC1h 10m
2026-07-14 CHH7397 - Jul 14, 15:55 UTCJul 14, 16:05 UTC10m
2026-07-14 CHH7396 - Jul 14, 11:25 UTCJul 14, 12:05 UTC40m
2026-07-14 CHH7395 - Jul 14, 07:15 UTCJul 14, 07:25 UTC10m
2026-07-13 CHH7396 - Jul 13, 11:15 UTCJul 13, 11:40 UTC25m
2026-07-13 CHH7395 - Jul 13, 06:35 UTCJul 13, 06:45 UTC10m
2026-07-13 CHH7768 - Jul 13, 04:35 UTCJul 13, 04:45 UTC10m
2026-07-12 CHH7767 - Jul 12, 23:50 UTCJul 13, 00:01 UTC10m
2026-07-12 CHH7396 - Jul 12, 10:50 UTCJul 12, 11:45 UTC55m
2026-07-12 CHH7395 - Jul 12, 06:35 UTCJul 12, 06:45 UTC10m
2026-07-11 CHH7767 - Jul 11, 23:50 UTCJul 12, 00:01 UTC10m
2026-07-11 CHH7396 - Jul 11, 11:25 UTCJul 11, 11:50 UTC25m
2026-07-11 CHH7395 - Jul 11, 06:35 UTCJul 11, 06:45 UTC10m
2026-07-11 CHH7767 - Jul 11, 00:10 UTCJul 11, 00:20 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-225X page for operator, model, and routing details .

Mode-S 7820FD frequently asked

What is Mode-S code 7820FD?
7820FD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-225X.
Where is Mode-S 7820FD registered?
Mode-S code 7820FD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7820FD broadcasting right now?
No active broadcast right now. Last signal was 12d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7820FD, octal 36020375, decimal 7,872,765.
What flights does 7820FD operate?
Mode-S 7820FD has broadcast 20 distinct callsigns, including CHH756, CHH755, CHH447, CHH7396, CHH702.