Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 13h ago
Flights observed
128
Distinct callsigns
20
Country
CN
Last broadcast
13h ago

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
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
CES271 - 7 2026-07-10
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
CES272 - 5 2026-07-11
CES2269 China Eastern Airlines 5 2026-05-28
CES505 - 4 2026-07-09
CES7408 - 3 2026-07-13
CES723 - 3 2026-07-12
CES6014 - 3 2026-07-01
CES5375 China Eastern Airlines 3 2026-04-28
CES529 - 3 2026-06-29
CES506 - 3 2026-07-07
CES212 - 3 2026-07-04
CES211 - 3 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-03 CES517 - Jul 3, 03:30 UTCJul 3, 03:40 UTC10m
2026-07-02 CES6033 - Jul 2, 14:00 UTCJul 2, 20:35 UTC6h 35m
2026-07-01 CES6014 - Jul 1, 12:45 UTCJul 1, 13:10 UTC25m
2026-07-01 CES272 - Jul 1, 02:05 UTCJul 1, 10:50 UTC8h 45m
2026-06-30 CES271 - Jun 30, 05:45 UTCJun 30, 11:55 UTC6h 10m
2026-06-29 CES529 - Jun 29, 16:04 UTCJun 30, 04:20 UTC12h 16m
2026-06-29 CES529 - Jun 29, 07:30 UTCJun 30, 04:20 UTC20h 51m
2026-06-29 CES5033 - Jun 29, 00:44 UTCJun 29, 06:09 UTC5h 25m
2026-06-28 CES5012 - Jun 28, 07:20 UTCJun 28, 07:44 UTC25m
2026-06-27 CES5011 - Jun 27, 10:45 UTCJun 28, 05:40 UTC18h 55m
2026-06-27 CES5011 - Jun 27, 09:50 UTCJun 28, 05:40 UTC19h 50m
2026-06-27 CES5011 - Jun 27, 06:54 UTCJun 28, 05:40 UTC22h 45m
2026-06-26 CES6400 - Jun 26, 12:24 UTCJun 27, 10:45 UTC22h 20m
2026-06-26 CES6399 - Jun 26, 09:35 UTCJun 27, 07:10 UTC21h 35m
2026-06-26 CES272 - Jun 26, 02:54 UTCJun 26, 12:39 UTC9h 45m
2026-06-25 CES271 - Jun 25, 05:09 UTCJun 25, 11:35 UTC6h 25m
2026-06-24 CES529 - Jun 24, 10:04 UTCJun 25, 03:50 UTC17h 45m
2026-06-24 CES2008 - Jun 24, 09:05 UTCJun 24, 09:15 UTC10m
2026-06-24 CES2007 - Jun 24, 06:15 UTCJun 24, 07:40 UTC1h 25m
2026-06-23 CES2007 - Jun 23, 11:59 UTCJun 24, 07:40 UTC19h 40m
2026-06-23 CES5352 - Jun 23, 11:10 UTCJun 23, 11:24 UTC15m
2026-06-23 CES272 - Jun 23, 02:04 UTCJun 23, 09:14 UTC7h 10m
2026-06-22 CES271 - Jun 22, 04:44 UTCJun 22, 11:44 UTC7h 0m
2026-06-21 CES506 - Jun 21, 12:19 UTCJun 22, 03:19 UTC15h 0m
2026-06-21 CES505 - Jun 21, 05:25 UTCJun 21, 10:34 UTC5h 10m

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 13h ago.
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 CES2270, CES5011, CES2056, CES5565, CES271.