Apparatus

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sensors Mode-S transponder

7821BC

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32K5 · AIRBUS A-320neo

Hex
7821BC
Octal
36020674
Decimal
7,872,956
Country
CN
Tail
B-32K5
Type
A20N
No current signal · last broadcast 1d ago
Flights observed
87
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7821BC.

Country allocation

The ICAO 24-bit address 7821BC 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
CHH7038 - 10 2026-06-29
CHH7090 - 7 2026-06-26
CHH7092 - 6 2026-07-15
CHH7091 - 4 2026-07-02
CHH7008 Hainan Airlines 4 2026-06-10
CHH7004 - 4 2026-06-16
CHH722 - 3 2026-07-15
CHH721 - 3 2026-07-15
CHH7688 Hainan Airlines 2 2026-05-31
CHH7116 - 2 2026-06-24
CHH7096 Hainan Airlines 2 2026-06-23
CHH7089 - 2 2026-07-10
CHH7044 - 2 2026-07-13
CHH7037 Hainan Airlines 2 2026-05-27
CHH7034 Hainan Airlines 2 2026-05-12
CHH7018 Hainan Airlines 2 2026-05-28
CHH7007 - 2 2026-07-05
CHH7940 Hainan Airlines 1 2026-05-05
CHH7939 Hainan Airlines 1 2026-05-04
CHH7417 Hainan Airlines 1 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 CHH7056 HGH → HAK Jul 19, 08:55 UTCJul 19, 14:40 UTC5h 45m
2026-07-19 CHH7052 - Jul 19, 01:15 UTCJul 19, 05:50 UTC4h 35m
2026-07-18 CHH7051 HAK → HGH Jul 18, 05:25 UTCJul 19, 01:20 UTC19h 55m
2026-07-16 CHH7118 CSX → HAK Jul 16, 01:35 UTCJul 16, 11:30 UTC9h 55m
2026-07-15 CHH722 - Jul 15, 13:25 UTCJul 16, 11:30 UTC22h 5m
2026-07-15 CHH721 - Jul 15, 12:00 UTCJul 15, 12:15 UTC15m
2026-07-15 CHH7092 - Jul 15, 06:20 UTCJul 15, 06:35 UTC15m
2026-07-14 - - Jul 14, 16:10 UTCJul 14, 16:20 UTC10m
2026-07-13 CHH7044 - Jul 13, 07:35 UTCJul 14, 01:45 UTC18h 10m
2026-07-13 CHH7044 - Jul 13, 02:10 UTCJul 13, 14:45 UTC12h 35m
2026-07-10 CHH7089 - Jul 10, 02:35 UTCJul 10, 12:05 UTC9h 30m
2026-07-08 CHH7089 - Jul 8, 07:35 UTCJul 8, 15:10 UTC7h 35m
2026-07-07 CHH7002 - Jul 7, 23:15 UTCJul 7, 23:35 UTC20m
2026-07-07 CHH7209 - Jul 7, 04:15 UTCJul 7, 11:45 UTC7h 30m
2026-07-06 CHH6053 - Jul 6, 10:30 UTCJul 6, 15:30 UTC5h 0m
2026-07-05 CHH7306 - Jul 5, 15:35 UTCJul 6, 08:20 UTC16h 45m
2026-07-05 CHH7007 - Jul 5, 10:20 UTCJul 5, 10:40 UTC20m
2026-07-05 CHH7092 - Jul 5, 07:40 UTCJul 5, 07:55 UTC15m
2026-07-02 CHH7095 HAK → NNG Jul 2, 14:00 UTCJul 2, 14:10 UTC10m
2026-07-02 CHH7091 - Jul 2, 01:40 UTCJul 2, 05:25 UTC3h 45m
2026-07-01 CHH7091 - Jul 1, 01:30 UTCJul 1, 01:50 UTC20m
2026-06-30 CHH7092 - Jun 30, 05:05 UTCJun 30, 05:15 UTC10m
2026-06-29 CHH7038 - Jun 29, 10:50 UTCJun 29, 16:10 UTC5h 20m
2026-06-28 CHH7166 XIY → HAK Jun 28, 06:15 UTCJun 28, 06:30 UTC15m
2026-06-28 CHH7165 - Jun 28, 00:45 UTCJun 28, 00:59 UTC15m
2026-06-27 CHH7038 - Jun 27, 14:25 UTCJun 27, 14:35 UTC10m
2026-06-26 CHH7090 - Jun 26, 16:05 UTCJun 27, 07:30 UTC15h 25m
2026-06-26 CHH7090 - Jun 26, 12:19 UTCJun 27, 07:30 UTC19h 10m
2026-06-26 CHH7090 - Jun 26, 09:35 UTCJun 27, 07:30 UTC21h 55m
2026-06-26 CHH7090 - Jun 26, 02:14 UTCJun 26, 16:24 UTC14h 10m
2026-06-25 CHH7417 HAK → CSX Jun 25, 03:50 UTCJun 25, 03:59 UTC10m
2026-06-24 CHH7038 HFE → HAK Jun 24, 14:29 UTCJun 24, 14:39 UTC10m
2026-06-24 CHH7116 - Jun 24, 01:55 UTCJun 24, 07:30 UTC5h 35m
2026-06-23 CHH7096 NNG → HAK Jun 23, 16:05 UTCJun 23, 16:14 UTC10m
2026-06-23 CHH7091 HAK → KMG Jun 23, 01:35 UTCJun 23, 05:29 UTC3h 55m
2026-06-22 CHH7092 KMG → HAK Jun 22, 01:29 UTCJun 22, 05:24 UTC3h 55m
2026-06-21 CHH7087 HAK → TFU Jun 21, 01:30 UTCJun 21, 05:59 UTC4h 30m
2026-06-20 CHH722 - Jun 20, 12:39 UTCJun 20, 13:09 UTC30m
2026-06-20 CHH721 - Jun 20, 09:34 UTCJun 20, 11:09 UTC1h 35m
2026-06-20 CHH7092 KMG → HAK Jun 20, 01:34 UTCJun 20, 05:24 UTC3h 50m
2026-06-19 CHH7091 HAK → KMG Jun 19, 01:24 UTCJun 19, 05:24 UTC4h 0m
2026-06-18 CHH7096 NNG → HAK Jun 18, 15:50 UTCJun 18, 16:00 UTC10m
2026-06-17 CHH7092 KMG → HAK Jun 17, 15:20 UTCJun 18, 05:25 UTC14h 5m
2026-06-16 CHH7004 - Jun 16, 23:55 UTCJun 17, 00:15 UTC20m
2026-06-15 - - Jun 15, 15:30 UTCJun 15, 15:40 UTC10m
2026-06-10 CHH7008 CAN → HAK Jun 10, 05:20 UTCJun 10, 05:40 UTC20m
2026-06-09 CHH7004 CAN → HAK Jun 9, 23:50 UTCJun 10, 00:00 UTC10m
2026-06-07 CHH7359 SYX → KWE Jun 7, 23:40 UTCJun 8, 09:45 UTC10h 5m
2026-06-06 CHH7390 HGH → SZX Jun 6, 15:30 UTCJun 7, 07:15 UTC15h 45m
2026-06-05 CHH7285 CAN → CGO Jun 5, 09:25 UTCJun 5, 09:35 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-32K5 page for operator, model, and routing details .

Mode-S 7821BC frequently asked

What is Mode-S code 7821BC?
7821BC is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32K5.
Where is Mode-S 7821BC registered?
Mode-S code 7821BC is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7821BC 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 7821BC, octal 36020674, decimal 7,872,956.
What flights does 7821BC operate?
Mode-S 7821BC has broadcast 20 distinct callsigns, including CHH7038, CHH7090, CHH7092, CHH7091, CHH7008.