Apparatus

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sensors Mode-S transponder

781251

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1005 · AIRBUS A-321

Hex
781251
Octal
36011121
Decimal
7,869,009
Country
CN
Tail
B-1005
Type
A321
No current signal · last broadcast 3d ago
Flights observed
42
Distinct callsigns
20
Country
CN
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 781251.

Country allocation

The ICAO 24-bit address 781251 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
DKH1883 Juneyao Airlines 4 2026-05-21
DKH1890 Juneyao Airlines 3 2026-05-13
DKH1889 Juneyao Airlines 3 2026-05-12
DKH1884 Juneyao Airlines 3 2026-05-21
DKH1129 Juneyao Airlines 3 2026-05-12
DKH1506 Juneyao Airlines 2 2026-04-21
DKH1352 Juneyao Airlines 2 2026-05-25
DKH1351 Juneyao Airlines 2 2026-05-25
DKH1309 Juneyao Airlines 2 2026-05-26
DKH1307 Juneyao Airlines 2 2026-05-05
DKH1087 Juneyao Airlines 2 2026-05-26
DKH2048 Juneyao Airlines 1 2026-04-30
DKH2047 Juneyao Airlines 1 2026-04-30
DKH1853 Juneyao Airlines 1 2026-04-23
DKH1789 Juneyao Airlines 1 2026-05-17
DKH1505 Juneyao Airlines 1 2026-04-15
DKH1327 - 1 2026-04-14
DKH1310 Juneyao Airlines 1 2026-05-03
DKH1308 Juneyao Airlines 1 2026-05-05
DKH1178 Juneyao Airlines 1 2026-04-28

Recent flights last 42

DateFlightRouteTakeoffLandingDuration
2026-05-26 DKH1177 SHA → SYX May 26, 12:50 UTCMay 27, 06:49 UTC18h 0m
2026-05-26 DKH1087 PVG → HAK May 26, 08:39 UTCMay 27, 03:14 UTC18h 35m
2026-05-26 DKH1087 PVG → HAK May 26, 04:35 UTCMay 26, 12:54 UTC8h 20m
2026-05-26 DKH1309 PVG → TPE May 26, 02:29 UTCMay 26, 02:55 UTC25m
2026-05-25 DKH1352 BKK → PVG May 25, 19:35 UTCMay 25, 21:54 UTC2h 20m
2026-05-25 DKH1351 PVG → BKK May 25, 14:55 UTCMay 25, 16:55 UTC2h 0m
2026-05-24 DKH1127 SHA → SYX May 24, 11:25 UTCMay 24, 15:00 UTC3h 35m
2026-05-21 DKH1884 SZX → SHA May 21, 11:00 UTCMay 21, 11:10 UTC10m
2026-05-21 DKH1883 SHA → SZX May 21, 09:10 UTCMay 21, 09:25 UTC15m
2026-05-19 DKH1884 SZX → SHA May 19, 06:10 UTCMay 19, 06:20 UTC10m
2026-05-19 DKH1883 SHA → SZX May 19, 04:20 UTCMay 19, 04:45 UTC25m
2026-05-17 DKH1789 NKG → XMN May 17, 10:15 UTCMay 17, 10:50 UTC35m
2026-05-17 DKH1884 SZX → SHA May 17, 05:40 UTCMay 17, 05:50 UTC10m
2026-05-17 DKH1883 SHA → SZX May 17, 03:20 UTCMay 17, 03:55 UTC35m
2026-05-16 DKH1883 SHA → SZX May 16, 05:20 UTCMay 17, 03:55 UTC22h 35m
2026-05-13 DKH1111 SHA → SZX May 13, 12:10 UTCMay 13, 12:20 UTC10m
2026-05-13 DKH1890 SZX → SHA May 13, 00:00 UTCMay 13, 01:00 UTC1h 0m
2026-05-12 DKH1889 SHA → SZX May 12, 15:01 UTCMay 12, 15:25 UTC25m
2026-05-12 DKH1129 SHA → SYX May 12, 06:25 UTCMay 12, 10:10 UTC3h 45m
2026-05-11 DKH1129 SHA → SYX May 11, 13:35 UTCMay 12, 10:10 UTC20h 36m
2026-05-10 DKH1890 SZX → SHA May 10, 23:44 UTCMay 10, 23:55 UTC10m
2026-05-10 DKH1889 SHA → SZX May 10, 15:09 UTCMay 10, 15:29 UTC20m
2026-05-10 DKH1129 SHA → SYX May 10, 06:35 UTCMay 10, 10:19 UTC3h 45m
2026-05-05 DKH1308 HKG → PVG May 5, 04:05 UTCMay 5, 04:20 UTC15m
2026-05-05 DKH1307 PVG → HKG May 5, 02:15 UTCMay 5, 02:40 UTC25m
2026-05-05 DKH1307 PVG → HKG May 5, 01:05 UTCMay 5, 01:35 UTC30m
2026-05-03 DKH1310 TPE → PVG May 3, 04:35 UTCMay 3, 05:10 UTC35m
2026-05-03 DKH1309 PVG → TPE May 3, 02:05 UTCMay 3, 02:50 UTC45m
2026-04-30 DKH2048 HAK → HUZ Apr 30, 23:40 UTCApr 30, 23:55 UTC15m
2026-04-30 DKH2047 HGH → HUZ Apr 30, 14:50 UTCApr 30, 15:05 UTC15m
2026-04-28 DKH1178 SYX → SHA Apr 28, 03:25 UTCApr 28, 07:10 UTC3h 45m
2026-04-25 DKH1156 ZUH → PVG Apr 25, 14:25 UTCApr 25, 14:35 UTC10m
2026-04-25 DKH1155 PVG → ZUH Apr 25, 12:00 UTCApr 25, 12:20 UTC20m
2026-04-23 DKH1853 SHA → CAN Apr 23, 16:20 UTCApr 23, 16:35 UTC15m
2026-04-21 DKH1506 KIX → PVG Apr 21, 04:10 UTCApr 21, 04:55 UTC45m
2026-04-20 DKH1352 BKK → PVG Apr 20, 18:40 UTCApr 21, 02:25 UTC7h 45m
2026-04-20 DKH1351 PVG → BKK Apr 20, 14:50 UTCApr 20, 17:00 UTC2h 10m
2026-04-18 DKH1889 - Apr 18, 14:35 UTCApr 18, 15:30 UTC55m
2026-04-15 DKH1506 KIX → PVG Apr 15, 04:10 UTCApr 15, 04:50 UTC40m
2026-04-15 DKH1505 PVG → KIX Apr 15, 01:35 UTCApr 15, 02:00 UTC25m
2026-04-14 DKH1327 - Apr 14, 14:05 UTCApr 14, 14:45 UTC40m
2026-04-13 DKH1890 SZX → SHA Apr 13, 00:05 UTCApr 13, 00:15 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-1005 page for operator, model, and routing details .

Mode-S 781251 frequently asked

What is Mode-S code 781251?
781251 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1005.
Where is Mode-S 781251 registered?
Mode-S code 781251 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781251 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781251, octal 36011121, decimal 7,869,009.
What flights does 781251 operate?
Mode-S 781251 has broadcast 20 distinct callsigns, including DKH1883, DKH1890, DKH1889, DKH1884, DKH1129.