sensors Mode-S transponder

781872

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20E6 · BOEING 737-800

Hex
781872
Octal
36014162
Decimal
7,870,578
Country
CN
Tail
B-20E6
Type
B738
No current signal · last broadcast 4h ago
Flights observed
61
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 781872.

Country allocation

The ICAO 24-bit address 781872 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CHH7750 SZX → SYX Jun 2, 15:15 UTCJun 2, 15:25 UTC10m
2026-06-01 CHH7743 NGB → CGQ Jun 1, 23:05 UTCJun 1, 23:15 UTC10m
2026-06-01 CHH7749 SYX → SZX Jun 1, 16:10 UTCJun 1, 16:25 UTC15m
2026-06-01 CHH7312 KHN → SYX Jun 1, 01:25 UTCJun 1, 12:20 UTC10h 55m
2026-05-31 CHH6034 FOC → ZUH May 31, 13:20 UTCMay 31, 13:45 UTC25m
2026-05-31 CHH6033 ZUH → FOC May 31, 10:10 UTCMay 31, 10:45 UTC35m
2026-05-30 CHH7325 SYX → WMT May 30, 00:45 UTCMay 30, 05:55 UTC5h 10m
2026-05-29 CHH6032 ZUH → SYX May 29, 15:20 UTCMay 29, 15:25 UTC5m
2026-05-29 CHH7045 ZUH → TYN May 29, 05:30 UTCMay 29, 05:40 UTC10m
2026-05-28 CHH7075 HAK → KHN May 28, 00:30 UTCMay 28, 10:30 UTC10h 0m
2026-05-27 CHH7045 ZUH → TYN May 27, 05:24 UTCMay 27, 05:40 UTC15m
2026-05-25 CHH7045 ZUH → TYN May 25, 06:05 UTCMay 25, 06:15 UTC10m
2026-05-24 CHH7654 JUH → TYN May 24, 14:40 UTCMay 24, 15:35 UTC55m
2026-05-24 CHH7653 TYN → KWE May 24, 01:50 UTCMay 24, 12:35 UTC10h 45m
2026-05-22 CHH7028 SZX → HAK May 22, 16:00 UTCMay 22, 16:15 UTC15m
2026-05-22 CHH7743 NGB → CGQ May 22, 00:00 UTCMay 22, 00:10 UTC10m
2026-05-21 CHH7744 SZX → LIY May 21, 18:10 UTCMay 21, 18:25 UTC15m
2026-05-21 CHH7743 NGB → CGQ May 21, 01:55 UTCMay 21, 02:05 UTC10m
2026-05-20 CHH7216 NKG → HAK May 20, 09:30 UTCMay 20, 09:50 UTC20m
2026-05-18 CHH7026 SZX → HAK May 18, 13:40 UTCMay 18, 13:55 UTC15m
2026-05-17 CHH7765 SZX → FUG May 17, 23:05 UTCMay 17, 23:20 UTC15m
2026-05-16 CHH7743 NGB → CGQ May 16, 23:55 UTCMay 17, 00:05 UTC10m
2026-05-16 CHH7312 KHN → SYX May 16, 01:35 UTCMay 16, 11:55 UTC10h 21m
2026-05-13 CHH7312 KHN → SYX May 13, 01:35 UTCMay 13, 14:51 UTC13h 15m
2026-05-12 CHH6034 FOC → ZUH May 12, 13:45 UTCMay 12, 14:10 UTC25m
2026-05-12 CHH6033 ZUH → FOC May 12, 10:00 UTCMay 12, 10:15 UTC15m
2026-05-11 CHH7374 HFE → SYX May 11, 02:00 UTCMay 11, 13:55 UTC11h 55m
2026-05-10 CHH7374 HFE → SYX May 10, 13:40 UTCMay 11, 02:10 UTC12h 30m
2026-05-08 CHH7750 SZX → SYX May 8, 15:30 UTCMay 8, 15:40 UTC10m
2026-05-07 CHH7749 SYX → SZX May 7, 16:10 UTCMay 7, 16:25 UTC15m
2026-05-07 CHH7312 KHN → SYX May 7, 01:40 UTCMay 7, 13:10 UTC11h 30m
2026-05-06 CHH7750 SZX → SYX May 6, 15:15 UTCMay 6, 15:35 UTC20m
2026-05-05 CHH7743 NGB → CGQ May 5, 23:45 UTCMay 5, 23:55 UTC10m
2026-05-05 CHH7312 KHN → SYX May 5, 01:40 UTCMay 5, 11:55 UTC10h 15m
2026-05-03 CHH7668 NGB → SZX May 3, 08:55 UTCMay 4, 00:15 UTC15h 20m
2026-05-02 CHH7668 NGB → SZX May 2, 15:15 UTCMay 3, 09:20 UTC18h 4m
2026-05-02 CHH7744 SZX → LIY May 2, 12:30 UTCMay 2, 13:00 UTC30m
2026-05-01 CHH7743 NGB → CGQ May 1, 23:05 UTCMay 1, 23:15 UTC10m
2026-05-01 CHH7528 HRB → SYX May 1, 05:40 UTCMay 1, 10:20 UTC4h 40m
2026-04-26 CHH7312 KHN → SYX Apr 26, 01:35 UTCApr 26, 12:00 UTC10h 25m
2026-04-25 CHH7374 HFE → SYX Apr 25, 13:30 UTCApr 26, 12:00 UTC22h 30m
2026-04-25 CHH7374 HFE → SYX Apr 25, 02:00 UTCApr 25, 13:50 UTC11h 50m
2026-04-24 CHH7750 SZX → SYX Apr 24, 15:20 UTCApr 24, 15:30 UTC10m
2026-04-24 CHH7764 NKG → SZX Apr 24, 08:00 UTCApr 24, 08:30 UTC30m
2026-04-23 CHH7312 KHN → SYX Apr 23, 02:00 UTCApr 23, 13:05 UTC11h 5m
2026-04-22 CHH7750 SZX → SYX Apr 22, 15:20 UTCApr 23, 13:05 UTC21h 45m
2026-04-22 CHH7744 SZX → LIY Apr 22, 12:50 UTCApr 22, 13:20 UTC30m
2026-04-21 CHH7749 SYX → SZX Apr 21, 16:01 UTCApr 21, 16:20 UTC20m
2026-04-21 CHH7312 KHN → SYX Apr 21, 01:30 UTCApr 21, 12:25 UTC10h 55m
2026-04-20 CHH7312 KHN → SYX Apr 20, 15:30 UTCApr 21, 12:25 UTC20h 55m

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-20E6 page for operator, model, and routing details .

Mode-S 781872 frequently asked

What is Mode-S code 781872?
781872 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20E6.
Where is Mode-S 781872 registered?
Mode-S code 781872 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781872 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781872, octal 36014162, decimal 7,870,578.
What flights does 781872 operate?
Mode-S 781872 has broadcast 20 distinct callsigns, including CHH7312, CHH7750, CHH7743, CHH7749, CHH7374.