Apparatus

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sensors Mode-S transponder

780028

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-2821 · BOEING 757-200

Hex
780028
Octal
36000050
Decimal
7,864,360
Country
CN
Tail
B-2821
Type
B752
No current signal · last broadcast 1d ago
Flights observed
78
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 780028.

Country allocation

The ICAO 24-bit address 780028 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
CSS318 - 7 2026-05-19
CSS326 SF Airlines 6 2026-05-18
CSS317 SF Airlines 6 2026-05-19
CSS6846 SF Airlines 4 2026-05-15
CSS325 SF Airlines 4 2026-05-18
CSS314 - 4 2026-05-18
CSS313 SF Airlines 4 2026-05-18
CSS6848 - 3 2026-05-14
CSS6847 - 3 2026-05-14
CSS6827 SF Airlines 3 2026-05-13
CSS280 SF Airlines 3 2026-06-01
CSS279 SF Airlines 3 2026-06-01
CSS142 SF Airlines 3 2026-06-01
CSS141 SF Airlines 3 2026-05-30
CSS7125 SF Airlines 2 2026-05-29
CSS6845 SF Airlines 2 2026-05-15
CSS6828 SF Airlines 2 2026-05-13
CSS6814 SF Airlines 2 2026-05-30
CSS6805 SF Airlines 2 2026-05-30
CSS358 SF Airlines 2 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 CSS142 ICN → EHU Jun 1, 15:05 UTCJun 1, 15:25 UTC20m
2026-06-01 CSS279 YNT → ICN Jun 1, 05:50 UTCJun 1, 06:20 UTC30m
2026-06-01 CSS280 ICN → YNT Jun 1, 02:55 UTCJun 1, 03:15 UTC20m
2026-05-30 CSS141 EHU → ICN May 30, 23:05 UTCMay 30, 23:25 UTC20m
2026-05-30 CSS6805 SZX → EHU May 30, 16:45 UTCMay 30, 17:05 UTC20m
2026-05-30 CSS6814 PEK → SZX May 30, 01:05 UTCMay 30, 01:25 UTC20m
2026-05-29 CSS6814 PEK → SZX May 29, 22:40 UTCMay 29, 22:55 UTC15m
2026-05-29 CSS7125 PEK → WUX May 29, 16:50 UTCMay 29, 17:00 UTC10m
2026-05-28 CSS7125 PEK → WUX May 28, 17:00 UTCMay 28, 17:15 UTC15m
2026-05-22 CSS142 ICN → EHU May 22, 14:45 UTCMay 22, 15:10 UTC25m
2026-05-22 CSS279 YNT → ICN May 22, 05:50 UTCMay 22, 06:20 UTC30m
2026-05-22 CSS280 ICN → YNT May 22, 03:15 UTCMay 22, 03:30 UTC15m
2026-05-21 CSS141 EHU → ICN May 21, 23:10 UTCMay 21, 23:30 UTC20m
2026-05-19 CSS6938 - May 19, 17:20 UTCMay 19, 17:35 UTC15m
2026-05-19 CSS318 - May 19, 10:25 UTCMay 19, 10:40 UTC15m
2026-05-19 CSS317 SZX → SGN May 19, 05:00 UTCMay 19, 05:10 UTC10m
2026-05-18 CSS326 MNL → SZX May 18, 21:40 UTCMay 18, 21:55 UTC15m
2026-05-18 CSS326 MNL → SZX May 18, 19:55 UTCMay 18, 20:30 UTC35m
2026-05-18 CSS325 SZX → MNL May 18, 16:40 UTCMay 18, 18:25 UTC1h 45m
2026-05-18 CSS314 - May 18, 10:00 UTCMay 18, 10:25 UTC25m
2026-05-18 CSS313 SZX → BKK May 18, 07:05 UTCMay 18, 07:40 UTC35m
2026-05-17 CSS6836 HGH → SZX May 17, 21:35 UTCMay 17, 22:20 UTC45m
2026-05-17 CSS7224 SZX → HGH May 17, 17:50 UTCMay 17, 18:01 UTC10m
2026-05-16 CSS326 MNL → SZX May 16, 22:35 UTCMay 16, 22:50 UTC15m
2026-05-16 CSS326 MNL → SZX May 16, 20:50 UTCMay 16, 21:25 UTC35m
2026-05-16 CSS325 SZX → MNL May 16, 17:55 UTCMay 16, 18:30 UTC35m
2026-05-16 CSS325 SZX → MNL May 16, 16:45 UTCMay 16, 16:55 UTC10m
2026-05-16 CSS318 - May 16, 08:41 UTCMay 16, 08:55 UTC15m
2026-05-16 CSS317 SZX → SGN May 16, 02:15 UTCMay 16, 02:25 UTC10m
2026-05-15 CSS6846 NTG → SZX May 15, 23:20 UTCMay 16, 00:00 UTC40m
2026-05-15 CSS6845 SZX → NTG May 15, 19:00 UTCMay 15, 19:15 UTC15m
2026-05-15 CSS358 TPE → SZX May 15, 03:05 UTCMay 15, 03:25 UTC20m
2026-05-15 CSS358 TPE → SZX May 15, 02:00 UTCMay 15, 02:30 UTC30m
2026-05-14 CSS357 SZX → TPE May 14, 23:10 UTCMay 15, 00:25 UTC1h 15m
2026-05-14 CSS6848 - May 14, 20:25 UTCMay 14, 21:20 UTC55m
2026-05-14 CSS6847 - May 14, 18:15 UTCMay 14, 18:50 UTC35m
2026-05-14 CSS314 - May 14, 10:55 UTCMay 14, 11:30 UTC35m
2026-05-14 CSS313 SZX → BKK May 14, 06:40 UTCMay 14, 09:05 UTC2h 25m
2026-05-13 CSS6828 PVG → SZX May 13, 18:00 UTCMay 13, 22:50 UTC4h 50m
2026-05-13 CSS6827 SZX → PVG May 13, 17:10 UTCMay 13, 17:25 UTC15m
2026-05-12 CSS6806 EHU → SZX May 12, 21:15 UTCMay 12, 21:30 UTC15m
2026-05-12 CSS6805 SZX → EHU May 12, 16:50 UTCMay 12, 17:00 UTC10m
2026-05-12 CSS318 - May 12, 09:45 UTCMay 12, 09:55 UTC10m
2026-05-12 CSS317 SZX → SGN May 12, 03:55 UTCMay 12, 04:05 UTC10m
2026-05-11 CSS6827 SZX → PVG May 11, 17:15 UTCMay 11, 17:25 UTC10m
2026-05-11 CSS314 - May 11, 11:35 UTCMay 11, 11:50 UTC15m
2026-05-11 CSS314 - May 11, 09:30 UTCMay 11, 10:15 UTC45m
2026-05-11 CSS313 SZX → BKK May 11, 06:55 UTCMay 11, 07:30 UTC35m
2026-05-11 CSS313 SZX → BKK May 11, 05:10 UTCMay 11, 05:30 UTC20m
2026-05-09 CSS7277 - May 9, 19:14 UTCMay 9, 19:40 UTC25m

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-2821 page for operator, model, and routing details .

Mode-S 780028 frequently asked

What is Mode-S code 780028?
780028 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-2821.
Where is Mode-S 780028 registered?
Mode-S code 780028 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780028 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780028, octal 36000050, decimal 7,864,360.
What flights does 780028 operate?
Mode-S 780028 has broadcast 20 distinct callsigns, including CSS318, CSS326, CSS317, CSS6846, CSS325.