sensors Mode-S transponder

780688

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5540 · BOEING 737-800

Hex
780688
Octal
36003210
Decimal
7,865,992
Country
CN
Tail
B-5540
Type
B738
No current signal · last broadcast 15h ago
Flights observed
49
Distinct callsigns
20
Country
CN
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 780688.

Country allocation

The ICAO 24-bit address 780688 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
CHH7648 Hainan Airlines 4 2026-05-25
CHH7987 Hainan Airlines 3 2026-04-27
CHH7988 Hainan Airlines 2 2026-04-27
CHH7982 Hainan Airlines 2 2026-05-30
CHH7735 Hainan Airlines 2 2026-04-15
CHH7672 - 2 2026-05-04
CHH7981 Hainan Airlines 1 2026-05-30
CHH7889 Hainan Airlines 1 2026-04-19
CHH7778 Hainan Airlines 1 2026-04-26
CHH7774 Hainan Airlines 1 2026-04-14
CHH7773 - 1 2026-04-14
CHH7748 - 1 2026-04-15
CHH7747 Hainan Airlines 1 2026-04-15
CHH7732 - 1 2026-04-14
CHH7674 - 1 2026-05-26
CHH7673 - 1 2026-05-26
CHH7671 - 1 2026-05-02
CHH7638 Hainan Airlines 1 2026-05-21
CHH7582 Hainan Airlines 1 2026-05-27
CHH7569 Hainan Airlines 1 2026-05-01

Recent flights last 49

DateFlightRouteTakeoffLandingDuration
2026-05-30 CHH7982 TPE → CAN May 30, 05:05 UTCMay 30, 05:20 UTC15m
2026-05-30 CHH7982 TPE → CAN May 30, 04:05 UTCMay 30, 04:35 UTC30m
2026-05-30 CHH7981 CAN → TPE May 30, 00:25 UTCMay 30, 01:50 UTC1h 25m
2026-05-27 CHH7582 PEK → HAK May 27, 08:35 UTCMay 27, 11:25 UTC2h 50m
2026-05-27 CHH7136 CSX → PEK May 27, 05:29 UTCMay 27, 05:45 UTC15m
2026-05-26 CHH7135 PEK → CSX May 26, 23:25 UTCMay 26, 23:45 UTC20m
2026-05-26 CHH7674 - May 26, 14:24 UTCMay 26, 14:45 UTC20m
2026-05-26 CHH7673 - May 26, 09:35 UTCMay 26, 09:45 UTC10m
2026-05-25 CHH7648 SHE → HAK May 25, 11:15 UTCMay 25, 11:40 UTC25m
2026-05-21 CHH7638 ZUH → CGO May 21, 07:50 UTCMay 21, 08:05 UTC15m
2026-05-09 CHH7310 CAN → SYX May 9, 15:20 UTCMay 9, 15:30 UTC10m
2026-05-04 CHH7672 - May 4, 15:10 UTCMay 4, 15:30 UTC20m
2026-05-03 CHH7672 - May 3, 14:55 UTCMay 4, 07:25 UTC16h 30m
2026-05-02 CHH7671 - May 2, 13:30 UTCMay 3, 07:15 UTC17h 44m
2026-05-01 CHH7569 XIY → SHE May 1, 02:40 UTCMay 1, 02:50 UTC10m
2026-04-30 CHH7512 ZUH → XIY Apr 30, 04:00 UTCApr 30, 04:10 UTC10m
2026-04-29 CHH7337 PEK → XIY Apr 29, 14:15 UTCApr 29, 14:35 UTC20m
2026-04-29 CHH7247 PEK → TFU Apr 29, 05:09 UTCApr 29, 05:25 UTC15m
2026-04-28 CHH7079 PEK → SYX Apr 28, 00:45 UTCApr 28, 00:55 UTC10m
2026-04-27 CHH7134 - Apr 27, 16:30 UTCApr 27, 16:45 UTC15m
2026-04-27 CHH7133 - Apr 27, 12:10 UTCApr 27, 12:30 UTC20m
2026-04-27 CHH7988 TPE → PEK Apr 27, 05:15 UTCApr 27, 05:40 UTC25m
2026-04-27 CHH7987 PEK → TPE Apr 27, 02:05 UTCApr 27, 02:35 UTC30m
2026-04-26 CHH7987 PEK → TPE Apr 26, 23:55 UTCApr 27, 00:05 UTC10m
2026-04-26 CHH7778 BAR → PEK Apr 26, 14:20 UTCApr 26, 14:30 UTC10m
2026-04-26 CHH7138 XIY → PEK Apr 26, 04:00 UTCApr 26, 04:20 UTC20m
2026-04-23 CHH7237 PEK → XIY Apr 23, 03:15 UTCApr 23, 03:35 UTC20m
2026-04-22 CHH6394 - Apr 22, 14:05 UTCApr 22, 14:20 UTC15m
2026-04-21 CHH7648 SHE → HAK Apr 21, 11:35 UTCApr 22, 05:01 UTC17h 25m
2026-04-21 CHH7648 SHE → HAK Apr 21, 08:00 UTCApr 22, 05:01 UTC21h 0m
2026-04-20 CHH7648 SHE → HAK Apr 20, 12:15 UTCApr 21, 12:01 UTC23h 46m
2026-04-20 CHH7146 URC → PEK Apr 20, 08:50 UTCApr 20, 09:10 UTC20m
2026-04-19 CHH7145 PEK → URC Apr 19, 23:45 UTCApr 20, 00:00 UTC15m
2026-04-19 CHH7889 PEK → YZY Apr 19, 12:00 UTCApr 19, 12:15 UTC15m
2026-04-19 CHH7988 TPE → PEK Apr 19, 05:15 UTCApr 19, 05:35 UTC20m
2026-04-19 CHH7987 PEK → TPE Apr 19, 02:25 UTCApr 19, 02:50 UTC25m
2026-04-17 CHH7120 PVG → HAK Apr 17, 11:40 UTCApr 17, 12:00 UTC20m
2026-04-17 CHH7119 HAK → PVG Apr 17, 05:20 UTCApr 17, 06:15 UTC55m
2026-04-16 CHH7028 SZX → HAK Apr 16, 15:15 UTCApr 16, 15:30 UTC15m
2026-04-15 CHH7735 SZX → CGO Apr 15, 22:35 UTCApr 15, 22:45 UTC10m
2026-04-15 CHH7748 - Apr 15, 17:05 UTCApr 15, 17:25 UTC20m
2026-04-15 CHH7747 SZX → TYN Apr 15, 09:20 UTCApr 15, 09:40 UTC20m
2026-04-14 CHH7735 SZX → CGO Apr 14, 22:25 UTCApr 14, 22:35 UTC10m
2026-04-14 CHH7774 KWE → SZX Apr 14, 16:20 UTCApr 14, 16:30 UTC10m
2026-04-14 CHH7773 - Apr 14, 12:05 UTCApr 14, 12:15 UTC10m
2026-04-14 CHH7732 - Apr 14, 10:35 UTCApr 14, 10:45 UTC10m
2026-04-13 CHH7078 - Apr 13, 09:45 UTCApr 13, 10:05 UTC20m
2026-04-13 CHH7077 - Apr 13, 06:35 UTCApr 13, 06:50 UTC15m
2026-04-13 CHH7370 - Apr 13, 00:40 UTCApr 13, 03:55 UTC3h 15m

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-5540 page for operator, model, and routing details .

Mode-S 780688 frequently asked

What is Mode-S code 780688?
780688 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5540.
Where is Mode-S 780688 registered?
Mode-S code 780688 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780688 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780688, octal 36003210, decimal 7,865,992.
What flights does 780688 operate?
Mode-S 780688 has broadcast 20 distinct callsigns, including CHH7648, CHH7987, CHH7988, CHH7982, CHH7735.