Apparatus

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sensors Mode-S transponder

7821F1

ICAO 24-bit transponder address · allocated to China

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

Hex
7821F1
Octal
36020761
Decimal
7,873,009
Country
CN
Tail
B-32KP
Type
A21N
No current signal · last broadcast Jul 26, 16:40 UTC
Flights observed
153
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 16:40 UTC

Last known position

Most recent position reported by Mode-S 7821F1.

Country allocation

The ICAO 24-bit address 7821F1 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
CES271 China Eastern Airlines 11 2026-07-23
CES2270 China Eastern Airlines 10 2026-05-30
CES5011 - 8 2026-06-27
CES2056 China Eastern Airlines 8 2026-04-26
CES5565 China Eastern Airlines 7 2026-04-26
CES272 China Eastern Airlines 7 2026-07-25
CES2055 China Eastern Airlines 7 2026-04-26
CES2007 - 7 2026-07-04
CES5566 China Eastern Airlines 6 2026-04-26
CES517 - 6 2026-07-08
CES212 - 6 2026-07-18
CES2269 China Eastern Airlines 5 2026-05-28
CES211 China Eastern Airlines 5 2026-07-18
CES723 - 4 2026-07-20
CES505 - 4 2026-07-09
CES7408 - 3 2026-07-13
CES6014 - 3 2026-07-01
CES6013 China Eastern Airlines 3 2026-07-25
CES5375 China Eastern Airlines 3 2026-04-28
CES529 - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CES5379 PVG → SYX Jul 26, 05:35 UTCJul 26, 16:40 UTC11h 6m
2026-07-25 CES5379 PVG → SYX Jul 25, 12:25 UTCJul 26, 12:00 UTC23h 36m
2026-07-25 CES6013 PVG → HAN Jul 25, 10:50 UTCJul 25, 11:00 UTC10m
2026-07-25 CES272 NRT → PVG Jul 25, 02:15 UTCJul 25, 03:55 UTC1h 40m
2026-07-23 CES271 PVG → NRT Jul 23, 21:00 UTCJul 24, 12:10 UTC15h 10m
2026-07-23 CES271 PVG → NRT Jul 23, 14:20 UTCJul 24, 12:10 UTC21h 50m
2026-07-23 CES6034 PQC → PVG Jul 23, 13:10 UTCJul 24, 10:15 UTC21h 5m
2026-07-23 CES6034 PQC → PVG Jul 23, 06:20 UTCJul 24, 06:00 UTC23h 40m
2026-07-22 CES7403 - Jul 22, 12:10 UTCJul 23, 04:30 UTC16h 20m
2026-07-22 CES272 NRT → PVG Jul 22, 02:15 UTCJul 22, 03:50 UTC1h 35m
2026-07-21 CES271 PVG → NRT Jul 21, 03:50 UTCJul 21, 12:35 UTC8h 45m
2026-07-20 CES271 PVG → NRT Jul 20, 14:30 UTCJul 21, 12:15 UTC21h 44m
2026-07-20 CES723 - Jul 20, 05:50 UTCJul 20, 12:50 UTC7h 0m
2026-07-20 CES2085 PVG → OKA Jul 20, 03:20 UTCJul 20, 03:40 UTC20m
2026-07-18 CES212 - Jul 18, 22:20 UTCJul 19, 17:35 UTC19h 15m
2026-07-18 CES212 - Jul 18, 20:40 UTCJul 19, 17:35 UTC20h 55m
2026-07-18 CES211 PVG → MNL Jul 18, 17:00 UTCJul 18, 19:15 UTC2h 15m
2026-07-18 CES6012 HAN → PVG Jul 18, 08:50 UTCJul 18, 09:10 UTC20m
2026-07-18 CES6011 PVG → HAN Jul 18, 06:55 UTCJul 18, 07:05 UTC10m
2026-07-17 CES6050 - Jul 17, 10:44 UTCJul 17, 14:55 UTC4h 10m
2026-07-17 CES6049 - Jul 17, 04:25 UTCJul 17, 08:40 UTC4h 15m
2026-07-16 CES212 - Jul 16, 18:50 UTCJul 16, 21:19 UTC2h 30m
2026-07-16 CES211 - Jul 16, 09:20 UTCJul 16, 17:14 UTC7h 55m
2026-07-16 CES726 - Jul 16, 01:15 UTCJul 16, 07:20 UTC6h 5m
2026-07-15 CES725 - Jul 15, 14:20 UTCJul 15, 15:35 UTC1h 15m
2026-07-13 CES7408 - Jul 13, 22:30 UTCJul 14, 12:30 UTC14h 0m
2026-07-13 CES7408 - Jul 13, 17:05 UTCJul 14, 12:30 UTC19h 25m
2026-07-12 CES7366 - Jul 12, 16:15 UTCJul 12, 17:20 UTC1h 5m
2026-07-12 CES723 - Jul 12, 08:55 UTCJul 12, 14:45 UTC5h 50m
2026-07-11 CES272 - Jul 11, 02:25 UTCJul 11, 04:01 UTC1h 35m
2026-07-10 CES271 - Jul 10, 10:05 UTCJul 10, 11:50 UTC1h 45m
2026-07-09 CES271 - Jul 9, 14:30 UTCJul 10, 11:50 UTC21h 20m
2026-07-09 CES271 HKG → NRT Jul 9, 14:00 UTCJul 10, 11:50 UTC21h 50m
2026-07-09 CES505 - Jul 9, 07:05 UTCJul 9, 12:20 UTC5h 15m
2026-07-08 CES517 - Jul 8, 17:10 UTCJul 9, 05:35 UTC12h 25m
2026-07-08 CES7408 - Jul 8, 05:00 UTCJul 9, 00:05 UTC19h 5m
2026-07-08 CES517 - Jul 8, 02:45 UTCJul 8, 03:10 UTC25m
2026-07-07 CES506 - Jul 7, 12:25 UTCJul 7, 13:50 UTC1h 25m
2026-07-07 CES505 - Jul 7, 05:05 UTCJul 7, 10:55 UTC5h 50m
2026-07-07 CES517 - Jul 7, 03:15 UTCJul 7, 03:35 UTC20m
2026-07-06 CES2086 - Jul 6, 05:55 UTCJul 6, 06:15 UTC20m
2026-07-06 CES2085 - Jul 6, 03:20 UTCJul 6, 03:45 UTC25m
2026-07-05 CES506 - Jul 5, 12:20 UTCJul 5, 13:45 UTC1h 25m
2026-07-05 CES505 - Jul 5, 09:10 UTCJul 5, 10:30 UTC1h 20m
2026-07-05 CES518 - Jul 5, 05:15 UTCJul 5, 05:40 UTC25m
2026-07-05 CES517 - Jul 5, 03:15 UTCJul 5, 03:30 UTC15m
2026-07-04 CES212 - Jul 4, 18:45 UTCJul 4, 20:05 UTC1h 20m
2026-07-04 CES211 - Jul 4, 09:35 UTCJul 4, 17:00 UTC7h 25m
2026-07-04 CES2007 - Jul 4, 06:15 UTCJul 4, 07:50 UTC1h 35m
2026-07-03 CES518 - Jul 3, 05:20 UTCJul 3, 05:50 UTC30m

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-32KP page for operator, model, and routing details .

Mode-S 7821F1 frequently asked

What is Mode-S code 7821F1?
7821F1 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32KP.
Where is Mode-S 7821F1 registered?
Mode-S code 7821F1 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7821F1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7821F1, octal 36020761, decimal 7,873,009.
What flights does 7821F1 operate?
Mode-S 7821F1 has broadcast 20 distinct callsigns, including CES271, CES2270, CES5011, CES2056, CES5565.