Apparatus

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sensors Mode-S transponder

7820BA

ICAO 24-bit transponder address · allocated to China

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

Hex
7820BA
Octal
36020272
Decimal
7,872,698
Country
CN
Tail
B-225J
Type
B38M
No current signal · last broadcast 2h ago
Flights observed
138
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7820BA.

Country allocation

The ICAO 24-bit address 7820BA 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
CHH7334 Hainan Airlines 23 2026-05-06
CHH6034 - 20 2026-07-16
CHH6033 - 18 2026-07-16
CHH7744 - 11 2026-07-11
CHH7743 Hainan Airlines 10 2026-07-17
CHH7750 - 6 2026-06-30
CHH7333 Hainan Airlines 6 2026-05-07
CHH7326 Hainan Airlines 6 2026-06-25
CHH7749 - 5 2026-07-17
CHH7312 - 5 2026-07-17
CHH7048 - 5 2026-04-14
CHH7384 - 4 2026-07-04
CHH7094 Hainan Airlines 3 2026-06-07
CHH7325 Hainan Airlines 2 2026-06-20
CHH7311 - 2 2026-07-06
CHH7045 Hainan Airlines 2 2026-06-02
CHH7870 - 1 2026-07-08
CHH7767 - 1 2026-07-07
CHH7396 - 1 2026-07-07
CHH7395 - 1 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CHH7743 NGB → CGQ Jul 17, 23:10 UTCJul 17, 23:20 UTC10m
2026-07-17 CHH7749 - Jul 17, 16:19 UTCJul 17, 16:29 UTC10m
2026-07-17 CHH7312 - Jul 17, 02:20 UTCJul 17, 12:35 UTC10h 15m
2026-07-16 CHH6034 - Jul 16, 14:10 UTCJul 16, 14:25 UTC15m
2026-07-16 CHH6033 - Jul 16, 10:20 UTCJul 16, 10:29 UTC10m
2026-07-15 CHH6034 - Jul 15, 16:15 UTCJul 15, 16:55 UTC40m
2026-07-14 CHH6034 - Jul 14, 13:10 UTCJul 14, 14:00 UTC50m
2026-07-14 CHH6033 - Jul 14, 10:15 UTCJul 14, 10:25 UTC10m
2026-07-13 CHH6034 - Jul 13, 12:40 UTCJul 13, 13:40 UTC1h 0m
2026-07-13 CHH6033 - Jul 13, 10:20 UTCJul 13, 10:35 UTC15m
2026-07-12 CHH6034 - Jul 12, 13:20 UTCJul 12, 13:45 UTC25m
2026-07-12 CHH6033 - Jul 12, 10:10 UTCJul 12, 10:20 UTC10m
2026-07-11 CHH7744 - Jul 11, 12:20 UTCJul 11, 12:40 UTC20m
2026-07-10 CHH7743 - Jul 10, 23:10 UTCJul 10, 23:20 UTC10m
2026-07-08 CHH7870 - Jul 8, 23:55 UTCJul 9, 00:05 UTC10m
2026-07-08 CHH7744 - Jul 8, 14:15 UTCJul 8, 14:50 UTC35m
2026-07-07 CHH7743 NGB → CGQ Jul 7, 23:55 UTCJul 8, 00:10 UTC15m
2026-07-07 CHH7396 - Jul 7, 18:40 UTCJul 7, 19:25 UTC45m
2026-07-07 CHH7395 - Jul 7, 14:40 UTCJul 7, 14:45 UTC5m
2026-07-07 CHH7767 - Jul 7, 00:30 UTCJul 7, 00:40 UTC10m
2026-07-06 CHH7749 - Jul 6, 18:40 UTCJul 6, 18:55 UTC15m
2026-07-06 CHH7311 - Jul 6, 01:45 UTCJul 6, 13:15 UTC11h 30m
2026-07-04 CHH7384 - Jul 4, 15:45 UTCJul 5, 07:15 UTC15h 30m
2026-07-04 CHH7384 - Jul 4, 10:35 UTCJul 5, 07:15 UTC20h 40m
2026-07-04 CHH7384 - Jul 4, 04:45 UTCJul 4, 16:10 UTC11h 25m
2026-06-30 CHH7750 - Jun 30, 15:15 UTCJun 30, 15:25 UTC10m
2026-06-29 CHH7743 NGB → CGQ Jun 29, 23:09 UTCJun 29, 23:19 UTC10m
2026-06-27 CHH7744 - Jun 27, 12:55 UTCJun 27, 13:49 UTC55m
2026-06-26 CHH7312 - Jun 26, 01:34 UTCJun 26, 12:55 UTC11h 20m
2026-06-25 CHH7326 WMT → SYX Jun 25, 01:14 UTCJun 25, 06:14 UTC5h 0m
2026-06-24 CHH7326 WMT → SYX Jun 24, 05:54 UTCJun 24, 15:44 UTC9h 50m
2026-06-23 CHH7326 WMT → SYX Jun 23, 05:39 UTCJun 23, 06:09 UTC30m
2026-06-21 CHH6034 - Jun 21, 13:29 UTCJun 21, 13:50 UTC20m
2026-06-21 CHH6033 - Jun 21, 10:25 UTCJun 21, 10:34 UTC10m
2026-06-21 CHH7326 WMT → SYX Jun 21, 05:44 UTCJun 21, 05:59 UTC15m
2026-06-20 CHH6034 - Jun 20, 13:19 UTCJun 20, 13:44 UTC25m
2026-06-20 CHH6033 - Jun 20, 10:09 UTCJun 20, 10:25 UTC15m
2026-06-20 CHH7325 SYX → WMT Jun 20, 01:09 UTCJun 20, 06:10 UTC5h 0m
2026-06-19 CHH6034 - Jun 19, 13:34 UTCJun 19, 13:59 UTC25m
2026-06-19 CHH6033 - Jun 19, 10:19 UTCJun 19, 10:35 UTC15m
2026-06-19 CHH7326 WMT → SYX Jun 19, 01:10 UTCJun 19, 06:10 UTC5h 0m
2026-06-18 CHH6034 - Jun 18, 16:45 UTCJun 18, 17:15 UTC30m
2026-06-18 CHH6033 - Jun 18, 11:50 UTCJun 18, 12:00 UTC10m
2026-06-18 CHH7326 WMT → SYX Jun 18, 06:00 UTCJun 18, 06:25 UTC25m
2026-06-17 CHH7750 SZX → SYX Jun 17, 16:20 UTCJun 17, 16:35 UTC15m
2026-06-17 CHH7744 - Jun 17, 14:00 UTCJun 17, 14:25 UTC25m
2026-06-16 CHH7743 NGB → CGQ Jun 16, 23:55 UTCJun 17, 00:05 UTC10m
2026-06-16 CHH7744 - Jun 16, 14:39 UTCJun 16, 15:24 UTC45m
2026-06-15 CHH7743 NGB → CGQ Jun 15, 23:09 UTCJun 15, 23:19 UTC10m
2026-06-15 CHH7744 - Jun 15, 19:10 UTCJun 15, 19:35 UTC25m

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-225J page for operator, model, and routing details .

Mode-S 7820BA frequently asked

What is Mode-S code 7820BA?
7820BA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-225J.
Where is Mode-S 7820BA registered?
Mode-S code 7820BA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7820BA broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7820BA, octal 36020272, decimal 7,872,698.
What flights does 7820BA operate?
Mode-S 7820BA has broadcast 20 distinct callsigns, including CHH7334, CHH6034, CHH6033, CHH7744, CHH7743.