Apparatus

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sensors Mode-S transponder

7821CE

ICAO 24-bit transponder address · allocated to China

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

Hex
7821CE
Octal
36020716
Decimal
7,872,974
Country
CN
Tail
B-32KA
Type
A21N
No current signal · last broadcast Jul 26, 15:25 UTC
Flights observed
139
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 15:25 UTC

Last known position

Most recent position reported by Mode-S 7821CE.

Country allocation

The ICAO 24-bit address 7821CE 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 - 11 2026-07-20
CES5566 China Eastern Airlines 7 2026-05-25
CES5565 China Eastern Airlines 7 2026-05-25
CES529 - 7 2026-07-15
CES282 - 7 2026-07-18
CES272 China Eastern Airlines 7 2026-07-21
CES2056 China Eastern Airlines 5 2026-05-25
CES2055 China Eastern Airlines 5 2026-05-25
CES505 - 4 2026-06-26
CES7408 China Eastern Airlines 3 2026-07-23
CES5352 - 3 2026-06-29
CES517 - 3 2026-07-01
CES5011 China Eastern Airlines 3 2026-07-24
CES7365 - 2 2026-06-24
CES726 - 2 2026-07-13
CES725 - 2 2026-07-13
CES6050 China Eastern Airlines 2 2026-07-26
CES6014 - 2 2026-07-04
CES5380 - 2 2026-06-30
CES5379 China Eastern Airlines 2 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CES6050 SIN → PVG Jul 26, 11:00 UTCJul 26, 15:25 UTC4h 25m
2026-07-25 CES6049 PVG → SIN Jul 25, 14:05 UTCJul 26, 09:15 UTC19h 11m
2026-07-25 CES5158 PEK → PVG Jul 25, 06:55 UTCJul 25, 07:05 UTC10m
2026-07-25 CES5155 PVG → PEK Jul 25, 04:40 UTCJul 25, 04:55 UTC15m
2026-07-24 CES7366 - Jul 24, 14:45 UTCJul 24, 16:05 UTC1h 20m
2026-07-24 CES723 PVG → HKG Jul 24, 07:40 UTCJul 24, 13:10 UTC5h 30m
2026-07-24 CES5011 PVG → ICN Jul 24, 05:05 UTCJul 24, 05:50 UTC45m
2026-07-23 CES7408 SGN → PVG Jul 23, 11:50 UTCJul 24, 00:05 UTC12h 15m
2026-07-21 CES7408 - Jul 21, 08:20 UTCJul 22, 00:25 UTC16h 5m
2026-07-21 CES7408 - Jul 21, 03:35 UTCJul 22, 00:25 UTC20h 50m
2026-07-21 CES272 NRT → PVG Jul 21, 02:15 UTCJul 22, 00:25 UTC22h 10m
2026-07-20 CES271 - Jul 20, 10:00 UTCJul 20, 11:45 UTC1h 45m
2026-07-19 CES271 - Jul 19, 15:35 UTCJul 20, 11:45 UTC20h 10m
2026-07-19 CES271 - Jul 19, 14:20 UTCJul 20, 11:45 UTC21h 25m
2026-07-19 CES271 - Jul 19, 11:35 UTCJul 20, 11:30 UTC23h 55m
2026-07-19 CES6050 - Jul 19, 11:10 UTCJul 19, 15:35 UTC4h 25m
2026-07-18 CES282 - Jul 18, 18:40 UTCJul 19, 08:55 UTC14h 15m
2026-07-18 CES5155 PVG → PEK Jul 18, 05:15 UTCJul 18, 05:25 UTC10m
2026-07-17 CES212 - Jul 17, 18:40 UTCJul 17, 20:50 UTC2h 10m
2026-07-17 CES211 NRT → MNL Jul 17, 02:30 UTCJul 17, 17:05 UTC14h 35m
2026-07-16 CES271 - Jul 16, 04:55 UTCJul 16, 12:05 UTC7h 10m
2026-07-15 CES529 - Jul 15, 09:35 UTCJul 16, 03:25 UTC17h 50m
2026-07-14 CES5024 - Jul 14, 15:35 UTCJul 15, 09:40 UTC18h 4m
2026-07-14 CES5023 - Jul 14, 14:30 UTCJul 15, 09:40 UTC19h 9m
2026-07-14 CES5023 - Jul 14, 08:10 UTCJul 15, 03:30 UTC19h 19m
2026-07-13 CES726 - Jul 13, 23:50 UTCJul 14, 01:20 UTC1h 30m
2026-07-13 CES725 - Jul 13, 09:25 UTCJul 13, 15:25 UTC6h 0m
2026-07-13 CES5087 - Jul 13, 07:05 UTCJul 13, 07:25 UTC20m
2026-07-12 CES726 - Jul 12, 23:50 UTCJul 13, 01:25 UTC1h 35m
2026-07-12 CES725 - Jul 12, 11:50 UTCJul 12, 17:01 UTC5h 10m
2026-07-12 CES5011 - Jul 12, 09:50 UTCJul 12, 10:35 UTC45m
2026-07-11 CES2008 - Jul 11, 09:40 UTCJul 11, 09:50 UTC10m
2026-07-11 CES2007 - Jul 11, 07:50 UTCJul 11, 08:10 UTC20m
2026-07-10 CES282 - Jul 10, 16:05 UTCJul 10, 22:55 UTC6h 51m
2026-07-10 CES6012 - Jul 10, 08:20 UTCJul 10, 08:30 UTC10m
2026-07-10 CES6011 - Jul 10, 06:30 UTCJul 10, 06:45 UTC15m
2026-07-08 CES282 - Jul 8, 16:00 UTCJul 9, 09:10 UTC17h 10m
2026-07-07 CES282 - Jul 7, 21:55 UTCJul 8, 16:15 UTC18h 20m
2026-07-07 CES282 - Jul 7, 16:10 UTCJul 7, 22:55 UTC6h 45m
2026-07-05 CES5088 - Jul 5, 09:30 UTCJul 5, 09:55 UTC25m
2026-07-05 CES5087 PVG → FUK Jul 5, 07:00 UTCJul 5, 07:15 UTC15m
2026-07-04 CES6014 - Jul 4, 12:35 UTCJul 4, 13:05 UTC30m
2026-07-03 CES282 - Jul 3, 17:10 UTCJul 4, 11:00 UTC17h 50m
2026-07-03 CES282 - Jul 3, 10:30 UTCJul 3, 23:20 UTC12h 50m
2026-07-03 CES2008 - Jul 3, 09:50 UTCJul 3, 10:00 UTC10m
2026-07-03 CES2007 - Jul 3, 07:45 UTCJul 3, 07:55 UTC10m
2026-07-02 CES6014 - Jul 2, 12:50 UTCJul 3, 06:20 UTC17h 30m
2026-07-02 CES272 - Jul 2, 02:20 UTCJul 2, 10:20 UTC8h 0m
2026-07-01 CES271 - Jul 1, 05:25 UTCJul 1, 11:50 UTC6h 25m
2026-07-01 CES517 - Jul 1, 03:10 UTCJul 1, 03:25 UTC15m

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

Mode-S 7821CE frequently asked

What is Mode-S code 7821CE?
7821CE is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32KA.
Where is Mode-S 7821CE registered?
Mode-S code 7821CE is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7821CE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7821CE, octal 36020716, decimal 7,872,974.
What flights does 7821CE operate?
Mode-S 7821CE has broadcast 20 distinct callsigns, including CES271, CES5566, CES5565, CES529, CES282.