Apparatus

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sensors Mode-S transponder

7820F9

ICAO 24-bit transponder address · allocated to China

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

Hex
7820F9
Octal
36020371
Decimal
7,872,761
Country
CN
Tail
B-225T
Type
B38M
No current signal · last broadcast Jul 26, 21:35 UTC
Flights observed
186
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 21:35 UTC

Last known position

Most recent position reported by Mode-S 7820F9.

Country allocation

The ICAO 24-bit address 7820F9 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
CHH447 Hainan Airlines 14 2026-07-25
CHH430 - 9 2026-06-26
CHH429 - 8 2026-06-26
CHH7923 - 7 2026-06-27
CHH755 Hainan Airlines 7 2026-07-25
CHH7924 - 6 2026-06-27
CHH7909 Hainan Airlines 6 2026-07-25
CHH448 Hainan Airlines 6 2026-07-26
CHH7910 Hainan Airlines 5 2026-07-22
CHH756 - 5 2026-06-17
CHH7767 - 4 2026-07-08
CHH7156 - 4 2026-07-08
CHH7028 - 4 2026-07-15
CHH7398 - 3 2026-07-08
CHH7155 - 3 2026-07-04
CHH702 - 3 2026-06-29
CHH701 - 3 2026-06-29
CHH450 Hainan Airlines 3 2026-06-12
CHH7874 - 2 2026-07-12
CHH7873 - 2 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CHH448 HAK → TYN Jul 26, 21:10 UTCJul 26, 21:35 UTC25m
2026-07-25 CHH447 HAK → SYD Jul 25, 22:25 UTCJul 26, 18:50 UTC20h 26m
2026-07-25 CHH7909 HAK → SIN Jul 25, 13:20 UTCJul 25, 21:05 UTC7h 45m
2026-07-25 CHH755 HAK → KUL Jul 25, 11:25 UTCJul 25, 11:40 UTC15m
2026-07-23 CHH448 HAK → TYN Jul 23, 20:55 UTCJul 24, 15:25 UTC18h 30m
2026-07-23 CHH7909 HAK → SIN Jul 23, 18:45 UTCJul 23, 19:10 UTC25m
2026-07-22 CHH7910 SIN → HAK Jul 22, 20:50 UTCJul 23, 19:10 UTC22h 20m
2026-07-22 CHH447 - Jul 22, 10:20 UTCJul 22, 19:10 UTC8h 50m
2026-07-21 CHH447 - Jul 21, 21:05 UTCJul 22, 19:10 UTC22h 5m
2026-07-21 CHH7909 HAK → SIN Jul 21, 18:25 UTCJul 21, 18:55 UTC30m
2026-07-20 CHH7910 SIN → HAK Jul 20, 20:35 UTCJul 20, 21:00 UTC25m
2026-07-20 CHH447 - Jul 20, 10:15 UTCJul 20, 19:00 UTC8h 45m
2026-07-19 CHH447 - Jul 19, 20:35 UTCJul 20, 19:00 UTC22h 25m
2026-07-19 CHH447 - Jul 19, 05:25 UTCJul 19, 18:55 UTC13h 30m
2026-07-18 CHH447 - Jul 18, 20:45 UTCJul 19, 18:55 UTC22h 10m
2026-07-18 CHH7909 - Jul 18, 18:20 UTCJul 18, 18:55 UTC35m
2026-07-17 CHH7910 - Jul 17, 21:20 UTCJul 18, 18:55 UTC21h 36m
2026-07-17 CHH447 - Jul 17, 06:20 UTCJul 17, 19:15 UTC12h 55m
2026-07-16 CHH447 - Jul 16, 15:40 UTCJul 17, 10:40 UTC19h 0m
2026-07-16 CHH447 - Jul 16, 12:30 UTCJul 17, 10:40 UTC22h 10m
2026-07-16 CHH7074 - Jul 16, 02:35 UTCJul 16, 15:55 UTC13h 20m
2026-07-15 CHH7028 - Jul 15, 17:00 UTCJul 15, 17:15 UTC15m
2026-07-15 CHH7772 - Jul 15, 13:00 UTCJul 15, 13:40 UTC40m
2026-07-15 CHH7630 - Jul 15, 08:50 UTCJul 15, 09:05 UTC15m
2026-07-15 CHH7629 - Jul 15, 03:55 UTCJul 15, 04:10 UTC15m
2026-07-15 CHH7769 - Jul 15, 00:05 UTCJul 15, 00:15 UTC10m
2026-07-14 CHH7630 - Jul 14, 06:35 UTCJul 14, 06:45 UTC10m
2026-07-14 CHH7629 - Jul 14, 03:50 UTCJul 14, 04:10 UTC20m
2026-07-14 CHH7769 - Jul 14, 00:05 UTCJul 14, 00:50 UTC45m
2026-07-13 CHH7748 - Jul 13, 16:30 UTCJul 13, 16:45 UTC15m
2026-07-13 CHH7747 - Jul 13, 09:20 UTCJul 13, 09:30 UTC10m
2026-07-13 CHH7870 - Jul 13, 00:01 UTCJul 13, 00:10 UTC10m
2026-07-12 CHH7873 - Jul 12, 15:30 UTCJul 12, 15:40 UTC10m
2026-07-12 CHH7874 - Jul 12, 09:10 UTCJul 12, 09:25 UTC15m
2026-07-12 CHH7175 - Jul 12, 00:20 UTCJul 12, 00:35 UTC15m
2026-07-10 CHH7256 - Jul 10, 15:10 UTCJul 10, 15:50 UTC40m
2026-07-10 CHH7255 - Jul 10, 10:25 UTCJul 10, 10:35 UTC10m
2026-07-10 CHH7722 - Jul 10, 07:00 UTCJul 10, 08:05 UTC1h 5m
2026-07-10 CHH7721 - Jul 10, 02:30 UTCJul 10, 02:40 UTC10m
2026-07-09 CHH7023 - Jul 9, 23:50 UTCJul 10, 00:05 UTC15m
2026-07-09 CHH7028 - Jul 9, 16:15 UTCJul 9, 16:25 UTC10m
2026-07-09 CHH7276 - Jul 9, 14:50 UTCJul 9, 15:00 UTC10m
2026-07-09 CHH7768 - Jul 9, 04:50 UTCJul 9, 05:00 UTC10m
2026-07-08 CHH7767 - Jul 8, 23:50 UTCJul 9, 00:05 UTC15m
2026-07-08 CHH6206 - Jul 8, 17:05 UTCJul 8, 17:55 UTC50m
2026-07-08 CHH6205 - Jul 8, 12:35 UTCJul 8, 12:45 UTC10m
2026-07-08 CHH7156 - Jul 8, 09:05 UTCJul 8, 09:50 UTC45m
2026-07-08 CHH7398 - Jul 8, 00:30 UTCJul 8, 00:40 UTC10m
2026-07-07 CHH7391 - Jul 7, 14:55 UTCJul 7, 15:05 UTC10m
2026-07-07 CHH7870 - Jul 7, 00:15 UTCJul 7, 00:25 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-225T page for operator, model, and routing details .

Mode-S 7820F9 frequently asked

What is Mode-S code 7820F9?
7820F9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-225T.
Where is Mode-S 7820F9 registered?
Mode-S code 7820F9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7820F9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7820F9, octal 36020371, decimal 7,872,761.
What flights does 7820F9 operate?
Mode-S 7820F9 has broadcast 20 distinct callsigns, including CHH447, CHH430, CHH429, CHH7923, CHH755.