Apparatus

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sensors Mode-S transponder

7821AE

ICAO 24-bit transponder address · allocated to China

Currently assigned to B32JX · AIRBUS A-321neo

Hex
7821AE
Octal
36020656
Decimal
7,872,942
Country
CN
Tail
B32JX
Type
A21N
No current signal · last broadcast 3d ago
Flights observed
40
Distinct callsigns
14
Country
CN
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 7821AE.

Country allocation

The ICAO 24-bit address 7821AE 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 14 distinct

Callsign Airline Flights Last seen
CDC8787 - 7 2026-05-27
CDC8737 Zhejiang Loong Airlines 6 2026-05-27
CDC8738 Zhejiang Loong Airlines 5 2026-05-22
CDC8989 Zhejiang Loong Airlines 4 2026-05-10
CDC8206 Zhejiang Loong Airlines 3 2026-05-31
CDC8966 Zhejiang Loong Airlines 2 2026-06-01
CDC8965 Zhejiang Loong Airlines 2 2026-06-01
CDC8888 Zhejiang Loong Airlines 2 2026-05-20
CDC8788 - 2 2026-05-19
CDC8008 Zhejiang Loong Airlines 2 2026-04-26
CDC8007 Zhejiang Loong Airlines 2 2026-04-26
CDC8992 Zhejiang Loong Airlines 1 2026-05-07
CDC8699 Zhejiang Loong Airlines 1 2026-05-03
CDC8648 Zhejiang Loong Airlines 1 2026-04-22

Recent flights last 40

DateFlightRouteTakeoffLandingDuration
2026-06-01 CDC8966 SZX → HGH Jun 1, 06:05 UTCJun 1, 06:15 UTC10m
2026-06-01 CDC8965 HGH → SZX Jun 1, 03:55 UTCJun 1, 04:20 UTC25m
2026-05-31 CDC8206 HRB → HGH May 31, 14:25 UTCMay 31, 14:50 UTC25m
2026-05-27 CDC8787 - May 27, 04:30 UTCMay 27, 04:39 UTC10m
2026-05-27 CDC8737 HGH → SZX May 27, 02:34 UTCMay 27, 02:54 UTC20m
2026-05-25 CDC8206 HRB → HGH May 25, 13:45 UTCMay 25, 14:30 UTC45m
2026-05-25 CDC8787 - May 25, 06:00 UTCMay 25, 06:10 UTC10m
2026-05-25 CDC8737 HGH → SZX May 25, 03:40 UTCMay 25, 04:00 UTC20m
2026-05-22 CDC8738 SZX → HGH May 22, 15:35 UTCMay 22, 15:45 UTC10m
2026-05-20 CDC8888 PEK → HGH May 20, 02:55 UTCMay 20, 03:05 UTC10m
2026-05-19 CDC8788 - May 19, 13:35 UTCMay 19, 13:45 UTC10m
2026-05-18 CDC8738 SZX → HGH May 18, 14:45 UTCMay 18, 14:55 UTC10m
2026-05-14 CDC8738 SZX → HGH May 14, 16:50 UTCMay 14, 17:05 UTC15m
2026-05-14 CDC8788 - May 14, 15:10 UTCMay 14, 15:20 UTC10m
2026-05-10 CDC8989 HGH → CAN May 10, 16:40 UTCMay 10, 16:50 UTC10m
2026-05-07 CDC8992 HRB → HGH May 7, 07:00 UTCMay 7, 16:05 UTC9h 5m
2026-05-06 CDC8206 HRB → HGH May 6, 12:30 UTCMay 7, 07:35 UTC19h 4m
2026-05-06 CDC8787 - May 6, 04:25 UTCMay 6, 04:35 UTC10m
2026-05-06 CDC8737 HGH → SZX May 6, 02:30 UTCMay 6, 02:45 UTC15m
2026-05-05 CDC8787 - May 5, 04:20 UTCMay 5, 04:35 UTC15m
2026-05-04 CDC8738 SZX → HGH May 4, 14:55 UTCMay 4, 15:05 UTC10m
2026-05-03 CDC8699 HGH → CAN May 3, 05:45 UTCMay 3, 05:55 UTC10m
2026-05-01 CDC8787 - May 1, 04:25 UTCMay 1, 04:35 UTC10m
2026-05-01 CDC8737 HGH → SZX May 1, 02:45 UTCMay 1, 03:05 UTC20m
2026-04-27 CDC8738 SZX → HGH Apr 27, 15:00 UTCApr 27, 15:10 UTC10m
2026-04-26 CDC8008 HKG → HGH Apr 26, 06:20 UTCApr 26, 15:15 UTC8h 55m
2026-04-26 CDC8007 HGH → HKG Apr 26, 04:00 UTCApr 26, 04:20 UTC20m
2026-04-25 CDC8008 HKG → HGH Apr 25, 06:20 UTCApr 25, 06:45 UTC25m
2026-04-25 CDC8007 HGH → HKG Apr 25, 03:50 UTCApr 25, 04:15 UTC25m
2026-04-23 CDC8989 HGH → CAN Apr 23, 18:10 UTCApr 23, 18:25 UTC15m
2026-04-22 CDC8648 HRB → HZA Apr 22, 14:10 UTCApr 23, 06:40 UTC16h 30m
2026-04-22 CDC8787 - Apr 22, 05:45 UTCApr 22, 06:01 UTC15m
2026-04-22 CDC8737 HGH → SZX Apr 22, 03:15 UTCApr 22, 04:05 UTC50m
2026-04-20 CDC8989 HGH → CAN Apr 20, 16:55 UTCApr 20, 17:15 UTC20m
2026-04-20 CDC8989 HGH → CAN Apr 20, 16:05 UTCApr 20, 16:15 UTC10m
2026-04-20 CDC8888 PEK → HGH Apr 20, 03:05 UTCApr 20, 03:15 UTC10m
2026-04-19 CDC8787 - Apr 19, 05:20 UTCApr 19, 05:30 UTC10m
2026-04-19 CDC8737 HGH → SZX Apr 19, 03:00 UTCApr 19, 03:20 UTC20m
2026-04-18 CDC8966 SZX → HGH Apr 18, 06:20 UTCApr 18, 06:30 UTC10m
2026-04-18 CDC8965 HGH → SZX Apr 18, 04:30 UTCApr 18, 04:50 UTC20m

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 B32JX page for operator, model, and routing details .

Mode-S 7821AE frequently asked

What is Mode-S code 7821AE?
7821AE is an ICAO 24-bit transponder address. Allocated to China. Assigned to B32JX.
Where is Mode-S 7821AE registered?
Mode-S code 7821AE is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7821AE broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7821AE, octal 36020656, decimal 7,872,942.
What flights does 7821AE operate?
Mode-S 7821AE has broadcast 14 distinct callsigns, including CDC8787, CDC8737, CDC8738, CDC8989, CDC8206.