Apparatus

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sensors Mode-S transponder

7803EF

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-6331 · AIRBUS A-321

Hex
7803EF
Octal
36001757
Decimal
7,865,327
Country
CN
Tail
B-6331
Type
A321
No current signal · last broadcast Jul 25, 06:50 UTC
Flights observed
58
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 06:50 UTC

Last known position

Most recent position reported by Mode-S 7803EF.

Country allocation

The ICAO 24-bit address 7803EF 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
CES6296 - 7 2026-07-16
CES6280 China Eastern Airlines 7 2026-05-28
CES6279 China Eastern Airlines 6 2026-05-28
CES6662 China Eastern Airlines 4 2026-06-29
CES2074 - 4 2026-07-01
CES2073 - 4 2026-07-01
CES6940 - 3 2026-07-19
CES6669 - 3 2026-06-29
CES6295 - 3 2026-07-16
CES2283 - 2 2026-07-23
CES2016 - 2 2026-07-04
CES6939 - 1 2026-07-07
CES6685 China Eastern Airlines 1 2026-06-03
CES6670 China Eastern Airlines 1 2026-04-28
CES6667 China Eastern Airlines 1 2026-04-28
CES6589 - 1 2026-07-07
CES6307 China Eastern Airlines 1 2026-05-17
CES6234 China Eastern Airlines 1 2026-07-24
CES6152 - 1 2026-07-10
CES5199 China Eastern Airlines 1 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CES2109 XIY → PKX Jul 25, 06:35 UTCJul 25, 06:50 UTC15m
2026-07-25 CES2104 PKX → XIY Jul 25, 01:50 UTCJul 25, 02:15 UTC25m
2026-07-24 CES5199 XIY → PKX Jul 24, 11:35 UTCJul 24, 11:45 UTC10m
2026-07-24 CES6234 KWE → PKX Jul 24, 09:30 UTCJul 24, 10:00 UTC30m
2026-07-23 CES2283 - Jul 23, 14:30 UTCJul 23, 14:40 UTC10m
2026-07-19 CES6940 - Jul 19, 11:10 UTCJul 19, 11:30 UTC20m
2026-07-16 CES6296 - Jul 16, 07:15 UTCJul 16, 07:25 UTC10m
2026-07-16 CES6295 - Jul 16, 05:35 UTCJul 16, 05:45 UTC10m
2026-07-15 CES6940 - Jul 15, 11:00 UTCJul 15, 11:15 UTC15m
2026-07-10 CES6152 - Jul 10, 14:35 UTCJul 10, 14:50 UTC15m
2026-07-07 CES6589 - Jul 7, 15:55 UTCJul 7, 16:05 UTC10m
2026-07-07 CES6940 - Jul 7, 11:55 UTCJul 7, 12:20 UTC25m
2026-07-07 CES6939 - Jul 7, 07:30 UTCJul 7, 07:40 UTC10m
2026-07-04 CES2016 - Jul 4, 12:40 UTCJul 4, 12:50 UTC10m
2026-07-01 CES2074 - Jul 1, 07:00 UTCJul 1, 07:20 UTC20m
2026-07-01 CES2073 - Jul 1, 05:00 UTCJul 1, 05:30 UTC30m
2026-06-29 CES6662 SZX → PKX Jun 29, 23:14 UTCJun 29, 23:29 UTC15m
2026-06-29 CES6669 - Jun 29, 16:44 UTCJun 29, 16:59 UTC15m
2026-06-19 CES2016 - Jun 19, 10:09 UTCJun 19, 10:29 UTC20m
2026-06-18 CES6662 SZX → PKX Jun 18, 23:50 UTCJun 19, 00:00 UTC10m
2026-06-18 CES6669 PKX → SZX Jun 18, 21:35 UTCJun 18, 21:50 UTC15m
2026-06-17 CES6662 SZX → PKX Jun 17, 23:35 UTCJun 17, 23:55 UTC20m
2026-06-17 CES6669 PKX → SZX Jun 17, 16:10 UTCJun 17, 16:35 UTC25m
2026-06-04 CES2074 ICN → PKX Jun 4, 07:05 UTCJun 4, 07:35 UTC30m
2026-06-04 CES2073 PKX → ICN Jun 4, 05:00 UTCJun 4, 05:20 UTC20m
2026-06-03 CES6685 PKX → CKG Jun 3, 08:00 UTCJun 3, 08:10 UTC10m
2026-05-28 CES6280 SZX → PKX May 28, 12:05 UTCMay 28, 12:20 UTC15m
2026-05-28 CES6279 PKX → SZX May 28, 10:00 UTCMay 28, 10:10 UTC10m
2026-05-27 CES6280 SZX → PKX May 27, 12:05 UTCMay 27, 12:20 UTC15m
2026-05-20 CES2074 ICN → PKX May 20, 07:10 UTCMay 20, 07:35 UTC25m
2026-05-20 CES2073 PKX → ICN May 20, 05:10 UTCMay 20, 05:35 UTC25m
2026-05-19 CES6662 SZX → PKX May 19, 23:20 UTCMay 19, 23:40 UTC20m
2026-05-19 - - May 19, 17:05 UTCMay 19, 17:20 UTC15m
2026-05-18 CES6296 BAR → JGS May 18, 05:55 UTCMay 18, 06:10 UTC15m
2026-05-17 CES6307 PKX → CAN May 17, 08:45 UTCMay 17, 08:55 UTC10m
2026-05-04 CES6296 BAR → JGS May 4, 05:50 UTCMay 4, 06:00 UTC10m
2026-05-03 CES2074 ICN → PKX May 3, 06:55 UTCMay 3, 07:05 UTC10m
2026-05-03 CES2073 PKX → ICN May 3, 05:35 UTCMay 3, 05:45 UTC10m
2026-05-02 CES2283 XIY → DSN May 2, 13:25 UTCMay 2, 13:40 UTC15m
2026-04-30 CES6280 SZX → PKX Apr 30, 12:10 UTCApr 30, 12:20 UTC10m
2026-04-29 CES6296 BAR → JGS Apr 29, 09:25 UTCApr 29, 09:35 UTC10m
2026-04-28 CES6670 SZX → PKX Apr 28, 14:50 UTCApr 28, 15:00 UTC10m
2026-04-28 CES6667 PKX → SZX Apr 28, 13:10 UTCApr 28, 13:25 UTC15m
2026-04-27 CES6296 BAR → JGS Apr 27, 05:55 UTCApr 27, 06:10 UTC15m
2026-04-27 - - Apr 27, 04:00 UTCApr 27, 04:15 UTC15m
2026-04-26 CES6279 PKX → SZX Apr 26, 09:35 UTCApr 26, 09:55 UTC20m
2026-04-25 CES6280 SZX → PKX Apr 25, 11:55 UTCApr 25, 12:10 UTC15m
2026-04-25 CES6279 PKX → SZX Apr 25, 09:40 UTCApr 25, 09:55 UTC15m
2026-04-24 CES6296 BAR → JGS Apr 24, 08:40 UTCApr 24, 08:50 UTC10m
2026-04-24 CES6295 JGS → BAR Apr 24, 05:35 UTCApr 24, 05:45 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-6331 page for operator, model, and routing details .

Mode-S 7803EF frequently asked

What is Mode-S code 7803EF?
7803EF is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-6331.
Where is Mode-S 7803EF registered?
Mode-S code 7803EF is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7803EF broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 06:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7803EF, octal 36001757, decimal 7,865,327.
What flights does 7803EF operate?
Mode-S 7803EF has broadcast 20 distinct callsigns, including CES6296, CES6280, CES6279, CES6662, CES2074.