Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7821FD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32KU · AIRBUS A-321neo

Hex
7821FD
Octal
36020775
Decimal
7,873,021
Country
CN
Tail
B-32KU
Type
A21N
No current signal · last broadcast 4h ago
Flights observed
72
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 7821FD.

Country allocation

The ICAO 24-bit address 7821FD 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
CES272 China Eastern Airlines 5 2026-05-30
CES271 China Eastern Airlines 5 2026-05-29
CES529 China Eastern Airlines 4 2026-05-14
CES5011 China Eastern Airlines 4 2026-06-02
CES2007 China Eastern Airlines 4 2026-05-27
CES5379 China Eastern Airlines 3 2026-05-24
CES509 China Eastern Airlines 3 2026-05-28
CES505 China Eastern Airlines 3 2026-05-25
CES280 China Eastern Airlines 3 2026-05-20
CES212 China Eastern Airlines 3 2026-05-04
CES211 China Eastern Airlines 3 2026-05-04
CES724 China Eastern Airlines 2 2026-06-03
CES5566 China Eastern Airlines 2 2026-04-20
CES5375 China Eastern Airlines 2 2026-04-19
CES5352 China Eastern Airlines 2 2026-05-30
CES5332 China Eastern Airlines 2 2026-06-02
CES5088 China Eastern Airlines 2 2026-05-10
CES506 China Eastern Airlines 2 2026-05-25
CES279 China Eastern Airlines 2 2026-05-20
CES723 China Eastern Airlines 1 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 CES724 HKG → PVG Jun 3, 02:10 UTCJun 3, 03:25 UTC1h 15m
2026-06-02 CES723 PVG → HKG Jun 2, 07:25 UTCJun 2, 12:40 UTC5h 15m
2026-06-02 CES5011 PVG → ICN Jun 2, 05:30 UTCJun 2, 05:55 UTC25m
2026-06-02 CES5332 SZX → PVG Jun 2, 00:05 UTCJun 2, 00:30 UTC25m
2026-06-01 CES5332 SZX → PVG Jun 1, 23:25 UTCJun 1, 23:35 UTC10m
2026-06-01 CES5359 PVG → SZX Jun 1, 15:35 UTCJun 1, 15:55 UTC20m
2026-05-30 CES5352 SZX → PVG May 30, 11:20 UTCMay 30, 11:35 UTC15m
2026-05-30 CES272 NRT → PVG May 30, 02:20 UTCMay 30, 09:35 UTC7h 15m
2026-05-29 CES271 PVG → NRT May 29, 05:00 UTCMay 29, 11:35 UTC6h 35m
2026-05-28 CES510 HKG → PVG May 28, 09:20 UTCMay 29, 03:25 UTC18h 5m
2026-05-28 CES509 PVG → HKG May 28, 05:55 UTCMay 28, 07:15 UTC1h 20m
2026-05-27 CES509 PVG → HKG May 27, 09:55 UTCMay 28, 07:15 UTC21h 20m
2026-05-27 CES509 PVG → HKG May 27, 08:50 UTCMay 28, 07:15 UTC22h 25m
2026-05-27 CES2007 PVG → MFM May 27, 05:45 UTCMay 27, 07:05 UTC1h 20m
2026-05-26 CES502 HKG → PVG May 26, 04:54 UTCMay 26, 06:14 UTC1h 20m
2026-05-26 CES501 PVG → HKG May 26, 03:00 UTCMay 26, 03:19 UTC20m
2026-05-25 CES506 HKG → PVG May 25, 12:20 UTCMay 26, 02:29 UTC14h 9m
2026-05-25 CES505 PVG → HKG May 25, 09:15 UTCMay 25, 10:35 UTC1h 20m
2026-05-24 CES5379 PVG → SYX May 24, 06:40 UTCMay 24, 12:50 UTC6h 10m
2026-05-23 CES5379 PVG → SYX May 23, 10:00 UTCMay 24, 07:50 UTC21h 50m
2026-05-23 CES2008 MFM → PVG May 23, 08:50 UTCMay 23, 09:10 UTC20m
2026-05-22 CES2007 PVG → MFM May 22, 13:20 UTCMay 23, 07:20 UTC17h 59m
2026-05-22 CES2007 PVG → MFM May 22, 13:10 UTCMay 23, 07:20 UTC18h 9m
2026-05-22 CES505 PVG → HKG May 22, 05:40 UTCMay 22, 11:35 UTC5h 54m
2026-05-21 CES5379 PVG → SYX May 21, 07:30 UTCMay 21, 22:30 UTC15h 0m
2026-05-20 CES280 CTS → PVG May 20, 04:30 UTCMay 20, 06:35 UTC2h 6m
2026-05-20 CES279 PVG → CTS May 20, 01:15 UTCMay 20, 03:10 UTC1h 55m
2026-05-16 CES272 NRT → PVG May 16, 02:20 UTCMay 16, 03:40 UTC1h 20m
2026-05-15 CES271 PVG → NRT May 15, 05:05 UTCMay 15, 12:00 UTC6h 55m
2026-05-14 CES529 PVG → NGO May 14, 11:15 UTCMay 15, 03:50 UTC16h 35m
2026-05-14 CES529 PVG → NGO May 14, 07:25 UTCMay 15, 03:50 UTC20h 25m
2026-05-14 CES529 PVG → NGO May 14, 06:10 UTCMay 15, 03:50 UTC21h 40m
2026-05-13 CES272 NRT → PVG May 13, 02:15 UTCMay 13, 03:40 UTC1h 25m
2026-05-12 CES271 PVG → NRT May 12, 04:45 UTCMay 12, 11:40 UTC6h 55m
2026-05-12 CES529 PVG → NGO May 12, 02:45 UTCMay 12, 03:20 UTC35m
2026-05-11 - - May 11, 12:30 UTCMay 11, 12:40 UTC10m
2026-05-10 CES282 SGN → PVG May 10, 16:10 UTCMay 10, 22:40 UTC6h 30m
2026-05-10 CES5088 FUK → PVG May 10, 09:24 UTCMay 10, 09:35 UTC10m
2026-05-08 CES5054 TAE → PVG May 8, 02:55 UTCMay 8, 03:24 UTC30m
2026-05-06 CES5352 SZX → PVG May 6, 11:10 UTCMay 6, 11:20 UTC10m
2026-05-06 CES5343 PVG → SZX May 6, 08:35 UTCMay 6, 08:55 UTC20m
2026-05-06 CES272 NRT → PVG May 6, 02:20 UTCMay 6, 04:05 UTC1h 45m
2026-05-05 CES271 PVG → NRT May 5, 03:10 UTCMay 5, 11:40 UTC8h 30m
2026-05-04 CES212 MNL → PVG May 4, 19:05 UTCMay 4, 21:00 UTC1h 55m
2026-05-04 CES211 PVG → MNL May 4, 07:35 UTCMay 4, 16:55 UTC9h 20m
2026-05-04 CES5033 PVG → ICN May 4, 00:40 UTCMay 4, 06:00 UTC5h 20m
2026-05-03 CES280 CTS → PVG May 3, 04:50 UTCMay 3, 07:10 UTC2h 20m
2026-05-02 CES212 MNL → PVG May 2, 18:45 UTCMay 3, 03:00 UTC8h 15m
2026-05-02 CES211 PVG → MNL May 2, 14:20 UTCMay 2, 16:45 UTC2h 25m
2026-05-02 CES5088 FUK → PVG May 2, 09:35 UTCMay 2, 09:45 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-32KU page for operator, model, and routing details .

Mode-S 7821FD frequently asked

What is Mode-S code 7821FD?
7821FD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32KU.
Where is Mode-S 7821FD registered?
Mode-S code 7821FD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7821FD broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7821FD, octal 36020775, decimal 7,873,021.
What flights does 7821FD operate?
Mode-S 7821FD has broadcast 20 distinct callsigns, including CES272, CES271, CES529, CES5011, CES2007.