Apparatus

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sensors Mode-S transponder

781F2A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32DK · AIRBUS A-320neo

Hex
781F2A
Octal
36017452
Decimal
7,872,298
Country
CN
Tail
B-32DK
Type
A20N
No current signal · last broadcast 2d ago
Flights observed
87
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 781F2A.

Country allocation

The ICAO 24-bit address 781F2A 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
CES796 - 7 2026-07-01
CES6235 - 6 2026-07-14
CES6110 - 6 2026-06-27
CES6109 - 6 2026-06-26
CES795 - 5 2026-06-30
CES873 - 4 2026-07-12
CES6270 China Eastern Airlines 4 2026-05-06
CES6108 - 4 2026-07-02
CES6262 - 3 2026-07-15
CES204 China Eastern Airlines 3 2026-06-10
CES203 China Eastern Airlines 3 2026-06-10
CES874 - 2 2026-07-12
CES6107 - 2 2026-07-02
CES2183 China Eastern Airlines 2 2026-06-05
CES2130 - 2 2026-07-08
CES2072 China Eastern Airlines 2 2026-04-29
CES2071 China Eastern Airlines 2 2026-04-29
CES2070 - 2 2026-06-15
CES2069 - 2 2026-06-14
CES868 China Eastern Airlines 1 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CES5197 - Jul 16, 00:20 UTCJul 16, 00:30 UTC10m
2026-07-15 CES6262 - Jul 15, 15:00 UTCJul 15, 15:10 UTC10m
2026-07-14 CES6235 - Jul 14, 15:10 UTCJul 14, 15:25 UTC15m
2026-07-14 CES6528 - Jul 14, 13:05 UTCJul 14, 13:20 UTC15m
2026-07-14 CES5182 - Jul 14, 05:05 UTCJul 14, 05:15 UTC10m
2026-07-12 CES874 - Jul 12, 08:10 UTCJul 12, 11:15 UTC3h 5m
2026-07-12 CES873 - Jul 12, 06:15 UTCJul 12, 06:35 UTC20m
2026-07-12 CES873 - Jul 12, 03:35 UTCJul 12, 03:55 UTC20m
2026-07-11 CES2236 - Jul 11, 10:45 UTCJul 11, 10:55 UTC10m
2026-07-11 CES2235 - Jul 11, 08:35 UTCJul 11, 08:45 UTC10m
2026-07-08 CES2130 - Jul 8, 04:15 UTCJul 8, 04:30 UTC15m
2026-07-07 CES2121 - Jul 7, 15:30 UTCJul 7, 15:45 UTC15m
2026-07-02 CES6108 - Jul 2, 09:25 UTCJul 2, 09:40 UTC15m
2026-07-02 CES6107 - Jul 2, 01:25 UTCJul 2, 01:50 UTC25m
2026-07-01 CES796 - Jul 1, 17:50 UTCJul 1, 20:50 UTC3h 0m
2026-06-30 CES795 - Jun 30, 23:55 UTCJul 1, 16:30 UTC16h 35m
2026-06-29 CES2130 - Jun 29, 04:04 UTCJun 29, 04:20 UTC15m
2026-06-28 CES6648 CTU → PKX Jun 28, 14:39 UTCJun 28, 14:59 UTC20m
2026-06-28 CES6644 CTU → PKX Jun 28, 07:09 UTCJun 28, 07:20 UTC10m
2026-06-27 CES6647 PKX → CTU Jun 27, 09:24 UTCJun 27, 09:40 UTC15m
2026-06-27 CES6110 - Jun 27, 05:29 UTCJun 27, 05:44 UTC15m
2026-06-26 CES6109 - Jun 26, 13:10 UTCJun 26, 13:34 UTC25m
2026-06-25 CES6262 - Jun 25, 14:59 UTCJun 25, 15:15 UTC15m
2026-06-18 CES796 - Jun 18, 20:15 UTCJun 18, 21:00 UTC45m
2026-06-18 CES796 - Jun 18, 18:00 UTCJun 18, 18:15 UTC15m
2026-06-18 CES795 - Jun 18, 13:30 UTCJun 18, 16:35 UTC3h 5m
2026-06-17 CES2140 SYX → XIY Jun 17, 11:45 UTCJun 17, 12:20 UTC35m
2026-06-17 CES2139 XIY → SYX Jun 17, 09:25 UTCJun 17, 09:40 UTC15m
2026-06-16 CES868 HAN → XIY Jun 16, 13:25 UTCJun 17, 09:40 UTC20h 16m
2026-06-16 CES867 XIY → HAN Jun 16, 11:20 UTCJun 16, 11:45 UTC25m
2026-06-15 CES2070 - Jun 15, 06:04 UTCJun 15, 09:20 UTC3h 15m
2026-06-14 CES2069 - Jun 14, 11:05 UTCJun 15, 04:15 UTC17h 9m
2026-06-10 CES204 HKG → XIY Jun 10, 07:00 UTCJun 10, 07:15 UTC15m
2026-06-10 CES203 XIY → HKG Jun 10, 04:40 UTCJun 10, 05:00 UTC20m
2026-06-07 CES204 HKG → XIY Jun 7, 06:40 UTCJun 8, 00:55 UTC18h 15m
2026-06-07 CES203 XIY → HKG Jun 7, 04:30 UTCJun 7, 04:55 UTC25m
2026-06-05 CES2183 XIY → SHE Jun 5, 23:35 UTCJun 5, 23:55 UTC20m
2026-06-05 CES2183 XIY → SHE Jun 5, 03:05 UTCJun 5, 23:55 UTC20h 50m
2026-06-04 CES874 KUL → KMG Jun 4, 08:00 UTCJun 5, 03:10 UTC19h 10m
2026-06-04 CES873 KMG → KUL Jun 4, 06:15 UTCJun 4, 06:40 UTC25m
2026-06-03 CES873 KMG → KUL Jun 3, 09:00 UTCJun 4, 04:10 UTC19h 10m
2026-06-03 CES2070 SIN → XIY Jun 3, 06:30 UTCJun 4, 04:10 UTC21h 40m
2026-06-03 CES2069 XIY → SIN Jun 3, 01:25 UTCJun 3, 04:20 UTC2h 55m
2026-05-31 CES796 KUL → PKX May 31, 20:10 UTCMay 31, 20:50 UTC40m
2026-05-31 CES796 KUL → PKX May 31, 17:55 UTCMay 31, 18:05 UTC10m
2026-05-31 CES795 PKX → KUL May 31, 16:15 UTCMay 31, 16:30 UTC15m
2026-05-31 CES795 PKX → KUL May 31, 13:10 UTCMay 31, 13:20 UTC10m
2026-05-30 CES6960 HAK → PKX May 30, 02:45 UTCMay 30, 05:55 UTC3h 10m
2026-05-22 CES204 HKG → XIY May 22, 06:50 UTCMay 22, 07:05 UTC15m
2026-05-22 CES203 XIY → HKG May 22, 04:35 UTCMay 22, 05:10 UTC35m

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

Mode-S 781F2A frequently asked

What is Mode-S code 781F2A?
781F2A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32DK.
Where is Mode-S 781F2A registered?
Mode-S code 781F2A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F2A broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F2A, octal 36017452, decimal 7,872,298.
What flights does 781F2A operate?
Mode-S 781F2A has broadcast 20 distinct callsigns, including CES796, CES6235, CES6110, CES6109, CES795.