Apparatus

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sensors Mode-S transponder

781DBE

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-222C · BOEING 767-300

Hex
781DBE
Octal
36016676
Decimal
7,871,934
Country
CN
Tail
B-222C
Type
B763
No current signal · last broadcast 18d ago
Flights observed
90
Distinct callsigns
20
Country
CN
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S 781DBE.

Country allocation

The ICAO 24-bit address 781DBE 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
CSS127 - 10 2026-06-28
CSS128 - 7 2026-06-29
CSS206 - 6 2026-06-17
CSS240 - 5 2026-06-09
CSS239 SF Airlines 5 2026-06-09
CSS161 SF Airlines 5 2026-06-08
CSS238 SF Airlines 3 2026-04-18
CSS159 SF Airlines 3 2026-05-15
CSS158 SF Airlines 3 2026-06-19
CSS148 - 3 2026-05-28
CSS7103 - 2 2026-06-21
CSS6804 SF Airlines 2 2026-06-02
CSS6801 SF Airlines 2 2026-06-22
CSS364 - 2 2026-06-16
CSS363 SF Airlines 2 2026-06-15
CSS358 SF Airlines 2 2026-06-03
CSS357 SF Airlines 2 2026-06-02
CSS258 - 2 2026-06-14
CSS257 - 2 2026-06-14
CSS173 - 2 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-29 CSS128 - Jun 29, 11:55 UTCJun 29, 14:09 UTC2h 15m
2026-06-28 CSS127 - Jun 28, 23:25 UTCJun 29, 06:54 UTC7h 30m
2026-06-24 CSS174 - Jun 24, 17:29 UTCJun 24, 20:05 UTC2h 35m
2026-06-23 CSS173 - Jun 23, 22:05 UTCJun 24, 14:20 UTC16h 15m
2026-06-23 CSS173 - Jun 23, 15:34 UTCJun 24, 14:20 UTC22h 45m
2026-06-23 CSS122 - Jun 23, 14:59 UTCJun 24, 13:30 UTC22h 30m
2026-06-23 CSS121 - Jun 23, 05:15 UTCJun 23, 13:00 UTC7h 45m
2026-06-22 CSS6801 SZX → EHU Jun 22, 18:00 UTCJun 22, 18:09 UTC10m
2026-06-22 CSS6842 - Jun 22, 01:35 UTCJun 22, 01:55 UTC20m
2026-06-21 CSS7103 - Jun 21, 16:44 UTCJun 21, 17:05 UTC20m
2026-06-19 CSS158 DEL → EHU Jun 19, 12:04 UTCJun 19, 14:34 UTC2h 30m
2026-06-18 CSS157 EHU → DEL Jun 18, 15:35 UTCJun 19, 10:14 UTC18h 39m
2026-06-18 CSS128 BUD → DEL Jun 18, 14:50 UTCJun 19, 10:14 UTC19h 24m
2026-06-17 CSS206 - Jun 17, 17:35 UTCJun 18, 11:55 UTC18h 20m
2026-06-17 CSS206 BUD → BUD Jun 17, 17:05 UTCJun 18, 11:55 UTC18h 50m
2026-06-17 CSS127 - Jun 17, 07:00 UTCJun 17, 14:20 UTC7h 20m
2026-06-16 CSS6938 - Jun 16, 18:09 UTCJun 16, 18:20 UTC10m
2026-06-16 CSS364 - Jun 16, 05:59 UTCJun 16, 06:15 UTC15m
2026-06-16 CSS364 - Jun 16, 01:50 UTCJun 16, 03:30 UTC1h 40m
2026-06-15 CSS363 SZX → NRT Jun 15, 21:40 UTCJun 15, 23:15 UTC1h 35m
2026-06-15 CSS363 SZX → NRT Jun 15, 19:30 UTCJun 15, 19:39 UTC10m
2026-06-14 CSS258 - Jun 14, 07:10 UTCJun 14, 08:00 UTC50m
2026-06-14 CSS257 - Jun 14, 04:15 UTCJun 14, 05:05 UTC50m
2026-06-10 CSS168 HAN → EHU Jun 10, 12:20 UTCJun 10, 12:40 UTC20m
2026-06-10 CSS168 HAN → EHU Jun 10, 05:40 UTCJun 10, 08:10 UTC2h 30m
2026-06-09 CSS167 - Jun 9, 14:50 UTCJun 10, 03:25 UTC12h 35m
2026-06-09 CSS239 ZUH → DEL Jun 9, 10:10 UTCJun 9, 12:20 UTC2h 10m
2026-06-09 CSS240 - Jun 9, 00:10 UTCJun 9, 02:25 UTC2h 15m
2026-06-08 CSS161 EHU → DEL Jun 8, 19:45 UTCJun 8, 22:10 UTC2h 25m
2026-06-07 CSS128 - Jun 7, 14:30 UTCJun 7, 16:35 UTC2h 5m
2026-06-06 CSS206 - Jun 6, 17:34 UTCJun 7, 11:40 UTC18h 5m
2026-06-06 CSS206 BUD → BUD Jun 6, 17:05 UTCJun 7, 11:40 UTC18h 35m
2026-06-06 CSS127 - Jun 6, 06:10 UTCJun 6, 14:04 UTC7h 55m
2026-06-05 CSS127 - Jun 5, 16:10 UTCJun 6, 14:04 UTC21h 55m
2026-06-05 CSS170 - Jun 5, 11:40 UTCJun 6, 06:35 UTC18h 55m
2026-06-05 CSS169 EHU → MAA Jun 5, 11:10 UTCJun 6, 06:35 UTC19h 25m
2026-06-04 CSS169 EHU → MAA Jun 4, 19:35 UTCJun 5, 17:25 UTC21h 50m
2026-06-04 CSS126 - Jun 4, 18:05 UTCJun 5, 17:25 UTC23h 20m
2026-06-04 CSS127 - Jun 4, 07:10 UTCJun 4, 15:05 UTC7h 55m
2026-06-03 CSS6805 SZX → EHU Jun 3, 16:55 UTCJun 3, 17:05 UTC10m
2026-06-03 CSS358 TPE → SZX Jun 3, 03:05 UTCJun 3, 03:25 UTC20m
2026-06-03 CSS358 TPE → SZX Jun 3, 02:00 UTCJun 3, 02:25 UTC25m
2026-06-02 CSS357 SZX → TPE Jun 2, 23:30 UTCJun 3, 00:05 UTC35m
2026-06-02 CSS357 SZX → TPE Jun 2, 22:45 UTCJun 2, 23:00 UTC15m
2026-06-02 CSS6804 EHU → SZX Jun 2, 20:45 UTCJun 2, 21:00 UTC15m
2026-05-30 CSS6839 SZX → WUX May 30, 23:35 UTCMay 30, 23:45 UTC10m
2026-05-30 CSS6804 EHU → SZX May 30, 20:40 UTCMay 30, 21:40 UTC1h 0m
2026-05-29 CSS128 - May 29, 18:30 UTCMay 29, 20:55 UTC2h 25m
2026-05-28 CSS127 - May 28, 19:40 UTCMay 29, 15:25 UTC19h 45m
2026-05-28 CSS127 - May 28, 17:35 UTCMay 29, 15:25 UTC21h 50m

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-222C page for operator, model, and routing details .

Mode-S 781DBE frequently asked

What is Mode-S code 781DBE?
781DBE is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-222C.
Where is Mode-S 781DBE registered?
Mode-S code 781DBE is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781DBE broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781DBE, octal 36016676, decimal 7,871,934.
What flights does 781DBE operate?
Mode-S 781DBE has broadcast 20 distinct callsigns, including CSS127, CSS128, CSS206, CSS240, CSS239.