Apparatus

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sensors Mode-S transponder

781E6E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-222M · BOEING 757-200

Hex
781E6E
Octal
36017156
Decimal
7,872,110
Country
CN
Tail
B-222M
Type
B752
No current signal · last broadcast 14h ago
Flights observed
54
Distinct callsigns
20
Country
CN
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 781E6E.

Country allocation

The ICAO 24-bit address 781E6E 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
CSS7240 - 6 2026-07-13
CSS326 SF Airlines 6 2026-06-12
CSS6812 SF Airlines 3 2026-06-10
CSS325 - 3 2026-06-12
CSS7278 - 2 2026-06-01
CSS7277 - 2 2026-06-02
CSS7203 SF Airlines 2 2026-05-21
CSS7109 - 2 2026-07-10
CSS6840 SF Airlines 2 2026-06-03
CSS6839 SF Airlines 2 2026-06-02
CSS6811 SF Airlines 2 2026-06-04
CSS358 SF Airlines 2 2026-06-04
CSS357 SF Airlines 2 2026-06-03
CSS314 - 2 2026-06-13
CSS7836 - 1 2026-07-10
CSS7344 SF Airlines 1 2026-05-29
CSS6936 - 1 2026-04-29
CSS6846 SF Airlines 1 2026-05-22
CSS6845 SF Airlines 1 2026-05-22
CSS6827 SF Airlines 1 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSS7240 - Jul 13, 20:50 UTCJul 13, 21:05 UTC15m
2026-07-10 CSS7836 - Jul 10, 21:45 UTCJul 10, 22:00 UTC15m
2026-07-10 CSS7109 - Jul 10, 19:05 UTCJul 10, 19:20 UTC15m
2026-07-10 CSS7109 - Jul 10, 16:40 UTCJul 10, 17:00 UTC20m
2026-06-23 CSS274 - Jun 23, 03:09 UTCJun 23, 04:35 UTC1h 25m
2026-06-23 CSS273 - Jun 23, 00:09 UTCJun 23, 01:35 UTC1h 25m
2026-06-13 CSS314 - Jun 13, 14:10 UTCJun 13, 14:25 UTC15m
2026-06-13 CSS314 - Jun 13, 12:00 UTCJun 13, 13:30 UTC1h 30m
2026-06-13 CSS313 SZX → BKK Jun 13, 08:10 UTCJun 13, 10:20 UTC2h 10m
2026-06-12 CSS326 MNL → SZX Jun 12, 21:45 UTCJun 12, 22:10 UTC25m
2026-06-12 CSS326 MNL → SZX Jun 12, 20:05 UTCJun 12, 20:30 UTC25m
2026-06-12 CSS325 - Jun 12, 16:30 UTCJun 12, 18:25 UTC1h 55m
2026-06-11 CSS326 MNL → SZX Jun 11, 21:35 UTCJun 11, 21:50 UTC15m
2026-06-11 CSS326 MNL → SZX Jun 11, 19:55 UTCJun 11, 20:30 UTC35m
2026-06-11 CSS325 SZX → MNL Jun 11, 16:40 UTCJun 11, 18:30 UTC1h 50m
2026-06-10 CSS6812 PEK → SZX Jun 10, 23:25 UTCJun 10, 23:35 UTC10m
2026-06-10 CSS6812 PEK → SZX Jun 10, 21:05 UTCJun 10, 21:15 UTC10m
2026-06-09 CSS7240 PEK → HGH Jun 9, 20:55 UTCJun 9, 21:05 UTC10m
2026-06-08 CSS7240 PEK → HGH Jun 8, 20:45 UTCJun 8, 21:00 UTC15m
2026-06-07 CSS7240 PEK → HGH Jun 7, 21:05 UTCJun 7, 21:15 UTC10m
2026-06-06 CSS7240 PEK → HGH Jun 6, 20:45 UTCJun 6, 20:55 UTC10m
2026-06-04 CSS7240 PEK → HGH Jun 4, 20:55 UTCJun 4, 21:05 UTC10m
2026-06-04 CSS6811 SZX → PEK Jun 4, 16:55 UTCJun 4, 17:05 UTC10m
2026-06-04 CSS358 TPE → SZX Jun 4, 02:50 UTCJun 4, 03:00 UTC10m
2026-06-04 CSS358 TPE → SZX Jun 4, 01:35 UTCJun 4, 02:05 UTC30m
2026-06-03 CSS357 SZX → TPE Jun 3, 23:25 UTCJun 4, 00:05 UTC40m
2026-06-03 CSS357 SZX → TPE Jun 3, 22:40 UTCJun 3, 22:50 UTC10m
2026-06-03 CSS6840 WUX → SZX Jun 3, 18:45 UTCJun 3, 18:55 UTC10m
2026-06-02 CSS6839 SZX → WUX Jun 2, 21:50 UTCJun 2, 22:00 UTC10m
2026-06-02 CSS7277 - Jun 2, 19:20 UTCJun 2, 19:35 UTC15m
2026-06-01 CSS7278 - Jun 1, 20:35 UTCJun 1, 20:45 UTC10m
2026-06-01 CSS6840 WUX → SZX Jun 1, 18:45 UTCJun 1, 18:55 UTC10m
2026-05-29 CSS7344 PEK → WUX May 29, 21:40 UTCMay 29, 21:50 UTC10m
2026-05-29 CSS6811 SZX → PEK May 29, 17:50 UTCMay 29, 18:00 UTC10m
2026-05-29 CSS317 SZX → SGN May 29, 03:15 UTCMay 29, 03:25 UTC10m
2026-05-28 CSS6814 PEK → SZX May 28, 22:15 UTCMay 28, 22:35 UTC20m
2026-05-28 CSS6813 SZX → PEK May 28, 18:25 UTCMay 28, 18:35 UTC10m
2026-05-27 CSS6812 PEK → SZX May 27, 20:30 UTCMay 27, 20:55 UTC25m
2026-05-26 CSS6839 SZX → WUX May 26, 21:34 UTCMay 26, 21:49 UTC15m
2026-05-26 CSS7277 - May 26, 19:10 UTCMay 26, 19:34 UTC25m
2026-05-25 CSS7278 - May 25, 22:30 UTCMay 25, 22:40 UTC10m
2026-05-22 CSS6846 NTG → SZX May 22, 23:00 UTCMay 22, 23:55 UTC55m
2026-05-22 CSS6845 SZX → NTG May 22, 19:05 UTCMay 22, 19:20 UTC15m
2026-05-21 CSS326 MNL → SZX May 21, 23:35 UTCMay 21, 23:55 UTC20m
2026-05-21 CSS326 MNL → SZX May 21, 22:00 UTCMay 21, 22:30 UTC30m
2026-05-21 CSS325 SZX → MNL May 21, 18:50 UTCMay 21, 20:35 UTC1h 45m
2026-05-21 CSS7203 PVG → SZX May 21, 01:45 UTCMay 21, 01:55 UTC10m
2026-05-20 CSS6827 SZX → PVG May 20, 20:30 UTCMay 20, 20:40 UTC10m
2026-05-19 CSS6802 EHU → SZX May 19, 22:10 UTCMay 19, 22:25 UTC15m
2026-04-29 CSS6936 - Apr 29, 16:10 UTCApr 29, 16:20 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-222M page for operator, model, and routing details .

Mode-S 781E6E frequently asked

What is Mode-S code 781E6E?
781E6E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-222M.
Where is Mode-S 781E6E registered?
Mode-S code 781E6E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781E6E broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781E6E, octal 36017156, decimal 7,872,110.
What flights does 781E6E operate?
Mode-S 781E6E has broadcast 20 distinct callsigns, including CSS7240, CSS326, CSS6812, CSS325, CSS7278.