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 Jul 26, 21:05 UTC
Flights observed
122
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 21:05 UTC

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
CSS326 - 8 2026-07-01
CSS318 - 7 2026-05-19
CSS317 SF Airlines 6 2026-05-19
CSS313 SF Airlines 6 2026-07-01
CSS6846 - 5 2026-06-26
CSS325 - 5 2026-07-01
CSS314 - 5 2026-07-01
CSS7240 SF Airlines 4 2026-07-26
CSS280 SF Airlines 4 2026-06-03
CSS279 SF Airlines 4 2026-06-03
CSS273 SF Airlines 4 2026-06-11
CSS142 SF Airlines 4 2026-06-03
CSS141 SF Airlines 4 2026-06-02
CSS6848 - 3 2026-05-14
CSS6847 - 3 2026-05-14
CSS6845 - 3 2026-06-26
CSS6827 SF Airlines 3 2026-05-13
CSS6814 - 3 2026-06-25
CSS6805 - 3 2026-07-02
CSS358 - 3 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSS7240 PEK → HGH Jul 26, 20:50 UTCJul 26, 21:05 UTC15m
2026-07-24 CSS7240 PEK → HGH Jul 24, 20:40 UTCJul 24, 21:05 UTC25m
2026-07-24 CSS7343 - Jul 24, 18:05 UTCJul 24, 18:25 UTC20m
2026-07-24 CSS272 - Jul 24, 06:50 UTCJul 24, 07:50 UTC1h 0m
2026-07-23 CSS271 - Jul 23, 21:20 UTCJul 24, 05:30 UTC8h 10m
2026-07-22 CSS7240 PEK → HGH Jul 22, 21:15 UTCJul 22, 21:25 UTC10m
2026-07-21 CSS7240 PEK → HGH Jul 21, 20:45 UTCJul 21, 21:00 UTC15m
2026-07-21 CSS272 - Jul 21, 06:15 UTCJul 21, 07:15 UTC1h 0m
2026-07-21 CSS271 - Jul 21, 04:15 UTCJul 21, 05:15 UTC1h 0m
2026-07-14 CSS266 - Jul 14, 01:45 UTCJul 14, 02:15 UTC30m
2026-07-13 CSS265 - Jul 13, 23:20 UTCJul 14, 00:15 UTC55m
2026-07-02 CSS6805 - Jul 2, 16:50 UTCJul 2, 17:00 UTC10m
2026-07-01 CSS326 - Jul 1, 22:05 UTCJul 1, 22:25 UTC20m
2026-07-01 CSS326 - Jul 1, 20:30 UTCJul 1, 21:00 UTC30m
2026-07-01 CSS325 - Jul 1, 17:05 UTCJul 1, 18:55 UTC1h 50m
2026-07-01 CSS314 - Jul 1, 11:55 UTCJul 1, 13:30 UTC1h 35m
2026-07-01 CSS313 SZX → BKK Jul 1, 09:30 UTCJul 1, 09:50 UTC20m
2026-07-01 CSS313 SZX → BKK Jul 1, 07:30 UTCJul 1, 07:45 UTC15m
2026-06-26 CSS6846 - Jun 26, 23:49 UTCJun 27, 00:14 UTC25m
2026-06-26 CSS6845 - Jun 26, 19:14 UTCJun 26, 19:30 UTC15m
2026-06-26 CSS310 KUL → SZX Jun 26, 17:25 UTCJun 26, 17:44 UTC20m
2026-06-26 CSS310 KUL → SZX Jun 26, 13:59 UTCJun 26, 14:29 UTC30m
2026-06-26 CSS309 SZX → KUL Jun 26, 11:30 UTCJun 26, 12:10 UTC40m
2026-06-25 CSS6814 - Jun 25, 23:24 UTCJun 25, 23:44 UTC20m
2026-06-25 CSS6813 - Jun 25, 19:29 UTCJun 25, 19:44 UTC15m
2026-06-24 CSS6836 - Jun 24, 21:54 UTCJun 24, 22:49 UTC55m
2026-06-24 CSS7224 - Jun 24, 17:59 UTCJun 24, 18:09 UTC10m
2026-06-24 CSS358 - Jun 24, 03:15 UTCJun 24, 04:30 UTC1h 15m
2026-06-24 CSS357 - Jun 24, 00:15 UTCJun 24, 01:39 UTC1h 25m
2026-06-23 CSS6804 - Jun 23, 20:40 UTCJun 23, 20:54 UTC15m
2026-06-11 CSS274 KIX → TAO Jun 11, 03:05 UTCJun 11, 04:40 UTC1h 35m
2026-06-11 CSS273 TAO → KIX Jun 11, 00:15 UTCJun 11, 01:45 UTC1h 30m
2026-06-10 CSS273 TAO → KIX Jun 10, 04:05 UTCJun 11, 01:45 UTC21h 40m
2026-06-10 CSS274 KIX → TAO Jun 10, 03:05 UTCJun 11, 01:45 UTC22h 40m
2026-06-09 CSS273 TAO → KIX Jun 9, 04:05 UTCJun 10, 01:35 UTC21h 30m
2026-06-09 CSS274 KIX → TAO Jun 9, 03:10 UTCJun 10, 01:35 UTC22h 25m
2026-06-09 CSS273 TAO → KIX Jun 9, 00:10 UTCJun 9, 01:35 UTC1h 25m
2026-06-05 CSS7119 PEK → HGH Jun 5, 16:40 UTCJun 5, 16:50 UTC10m
2026-06-04 CSS7110 SZX → PEK Jun 4, 21:55 UTCJun 4, 22:05 UTC10m
2026-06-04 CSS7277 - Jun 4, 19:10 UTCJun 4, 19:30 UTC20m
2026-06-03 CSS142 ICN → EHU Jun 3, 14:45 UTCJun 3, 15:05 UTC20m
2026-06-03 CSS279 YNT → ICN Jun 3, 05:55 UTCJun 3, 06:20 UTC25m
2026-06-03 CSS280 ICN → YNT Jun 3, 02:55 UTCJun 3, 03:15 UTC20m
2026-06-02 CSS141 EHU → ICN Jun 2, 23:30 UTCJun 2, 23:55 UTC25m
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

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 Jul 26, 21:05 UTC.
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 CSS326, CSS318, CSS317, CSS313, CSS6846.