Apparatus

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sensors Mode-S transponder

781EEA

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-223C · BOEING 757-200

Hex
781EEA
Octal
36017352
Decimal
7,872,234
Country
CN
Tail
B-223C
Type
B752
Broadcasting now · callsign CSS280 · 16,700 ft
Flights observed
55
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Current position

781EEA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781EEA 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
CSS326 SF Airlines 5 2026-05-20
CSS358 - 4 2026-06-26
CSS357 - 4 2026-06-25
CSS7410 SF Airlines 3 2026-04-30
CSS6828 SF Airlines 3 2026-04-22
CSS6805 - 3 2026-07-03
CSS325 SF Airlines 3 2026-05-20
CSS6827 SF Airlines 2 2026-04-22
CSS6806 - 2 2026-07-02
CSS314 - 2 2026-05-21
CSS313 SF Airlines 2 2026-05-21
CSS272 - 2 2026-06-30
CSS271 - 2 2026-06-30
CSS264 - 2 2026-07-02
CSS263 - 2 2026-07-02
CSS7413 - 1 2026-04-28
CSS7278 - 1 2026-06-30
CSS6938 - 1 2026-06-17
CSS6935 - 1 2026-06-25
CSS6846 SF Airlines 1 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSS141 - Jul 13, 23:15 UTCJul 13, 23:35 UTC20m
2026-07-03 CSS6805 - Jul 3, 16:30 UTCJul 3, 16:45 UTC15m
2026-07-02 CSS6806 - Jul 2, 20:50 UTCJul 2, 21:05 UTC15m
2026-07-02 CSS264 - Jul 2, 12:50 UTCJul 2, 13:10 UTC20m
2026-07-02 CSS263 - Jul 2, 10:40 UTCJul 2, 11:15 UTC35m
2026-06-30 CSS7278 - Jun 30, 20:40 UTCJun 30, 20:55 UTC15m
2026-06-30 CSS272 - Jun 30, 06:15 UTCJun 30, 07:15 UTC1h 0m
2026-06-30 CSS271 FUJ → KIX Jun 30, 03:55 UTCJun 30, 04:50 UTC55m
2026-06-29 CSS6839 - Jun 29, 21:14 UTCJun 29, 21:24 UTC10m
2026-06-27 CSS6810 - Jun 27, 21:25 UTCJun 27, 21:44 UTC20m
2026-06-26 CSS6803 - Jun 26, 16:20 UTCJun 26, 16:35 UTC15m
2026-06-26 CSS358 - Jun 26, 03:20 UTCJun 26, 03:29 UTC10m
2026-06-26 CSS358 - Jun 26, 02:20 UTCJun 26, 02:50 UTC30m
2026-06-25 CSS357 - Jun 25, 23:24 UTCJun 26, 00:05 UTC40m
2026-06-25 CSS357 - Jun 25, 22:39 UTCJun 25, 22:49 UTC10m
2026-06-25 CSS6935 - Jun 25, 20:49 UTCJun 25, 21:05 UTC15m
2026-06-20 CSS264 - Jun 20, 12:04 UTCJun 20, 12:30 UTC25m
2026-06-20 CSS263 - Jun 20, 10:09 UTCJun 20, 10:44 UTC35m
2026-06-17 CSS6938 - Jun 17, 17:05 UTCJun 17, 17:15 UTC10m
2026-06-16 CSS272 - Jun 16, 06:15 UTCJun 16, 07:15 UTC1h 0m
2026-06-16 CSS271 - Jun 16, 03:55 UTCJun 16, 04:45 UTC50m
2026-06-12 CSS6805 SZX → EHU Jun 12, 16:55 UTCJun 12, 17:05 UTC10m
2026-06-12 CSS358 TPE → SZX Jun 12, 02:20 UTCJun 12, 02:45 UTC25m
2026-06-12 CSS358 TPE → SZX Jun 12, 01:20 UTCJun 12, 01:50 UTC30m
2026-06-11 CSS357 SZX → TPE Jun 11, 23:20 UTCJun 11, 23:45 UTC25m
2026-06-11 CSS357 SZX → TPE Jun 11, 22:30 UTCJun 11, 22:45 UTC15m
2026-06-11 CSS6804 - Jun 11, 20:35 UTCJun 11, 20:50 UTC15m
2026-05-22 CSS6801 SZX → EHU May 22, 17:45 UTCMay 22, 18:00 UTC15m
2026-05-22 CSS6846 NTG → SZX May 22, 00:20 UTCMay 22, 00:40 UTC20m
2026-05-21 CSS314 - May 21, 14:30 UTCMay 21, 14:55 UTC25m
2026-05-21 CSS314 - May 21, 12:30 UTCMay 21, 13:01 UTC30m
2026-05-21 CSS313 SZX → BKK May 21, 09:50 UTCMay 21, 10:20 UTC30m
2026-05-21 CSS313 SZX → BKK May 21, 08:00 UTCMay 21, 08:10 UTC10m
2026-05-20 CSS326 MNL → SZX May 20, 22:55 UTCMay 20, 23:25 UTC30m
2026-05-20 CSS325 SZX → MNL May 20, 19:20 UTCMay 20, 21:30 UTC2h 10m
2026-05-19 CSS6806 EHU → SZX May 19, 21:45 UTCMay 19, 21:55 UTC10m
2026-04-30 CSS7410 SZX → CTU Apr 30, 19:10 UTCApr 30, 19:20 UTC10m
2026-04-28 CSS7410 SZX → CTU Apr 28, 21:00 UTCApr 28, 21:15 UTC15m
2026-04-28 CSS7413 - Apr 28, 18:55 UTCApr 28, 19:05 UTC10m
2026-04-27 CSS7410 SZX → CTU Apr 27, 19:20 UTCApr 27, 19:30 UTC10m
2026-04-25 CSS326 MNL → SZX Apr 25, 21:55 UTCApr 25, 22:10 UTC15m
2026-04-25 CSS326 MNL → SZX Apr 25, 20:05 UTCApr 25, 20:40 UTC35m
2026-04-25 CSS325 SZX → MNL Apr 25, 16:40 UTCApr 25, 18:25 UTC1h 45m
2026-04-24 CSS326 MNL → SZX Apr 24, 21:35 UTCApr 24, 21:50 UTC15m
2026-04-24 CSS326 MNL → SZX Apr 24, 19:55 UTCApr 24, 20:25 UTC30m
2026-04-24 CSS325 SZX → MNL Apr 24, 16:45 UTCApr 24, 18:30 UTC1h 45m
2026-04-23 CSS6812 PEK → SZX Apr 23, 21:40 UTCApr 23, 21:55 UTC15m
2026-04-23 CSS6811 SZX → PEK Apr 23, 17:30 UTCApr 23, 17:40 UTC9m
2026-04-22 CSS6828 PVG → SZX Apr 22, 22:55 UTCApr 22, 23:05 UTC10m
2026-04-22 CSS6828 PVG → SZX Apr 22, 21:40 UTCApr 22, 22:15 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-223C page for operator, model, and routing details .

Mode-S 781EEA frequently asked

What is Mode-S code 781EEA?
781EEA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-223C.
Where is Mode-S 781EEA registered?
Mode-S code 781EEA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781EEA broadcasting right now?
Yes. Mode-S 781EEA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781EEA, octal 36017352, decimal 7,872,234.
What flights does 781EEA operate?
Mode-S 781EEA has broadcast 20 distinct callsigns, including CSS326, CSS358, CSS357, CSS7410, CSS6828.