Apparatus

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sensors Mode-S transponder

781317

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1215 · BOEING 737-800

Hex
781317
Octal
36011427
Decimal
7,869,207
Country
CN
Tail
B-1215
Type
B738
No current signal · last broadcast Jul 25, 03:20 UTC
Flights observed
107
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 03:20 UTC

Last known position

Most recent position reported by Mode-S 781317.

Country allocation

The ICAO 24-bit address 781317 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
CHH7872 Hainan Airlines 5 2026-06-06
CHH7871 Hainan Airlines 5 2026-06-06
CHH747 - 4 2026-07-09
CHH7322 - 3 2026-06-23
CHH7235 - 3 2026-07-13
CHH7016 Hainan Airlines 3 2026-07-20
CHH7746 - 2 2026-06-20
CHH7715 Hainan Airlines 2 2026-05-25
CHH7709 Hainan Airlines 2 2026-06-13
CHH7663 Hainan Airlines 2 2026-07-25
CHH7555 - 2 2026-05-01
CHH748 - 2 2026-07-09
CHH7398 - 2 2026-06-20
CHH7397 - 2 2026-07-22
CHH7338 Hainan Airlines 2 2026-06-06
CHH7337 Hainan Airlines 2 2026-06-06
CHH7295 Hainan Airlines 2 2026-05-27
CHH720 - 2 2026-07-19
CHH7191 Hainan Airlines 2 2026-05-29
CHH719 Hainan Airlines 2 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CHH7664 TAO → WUH Jul 25, 02:55 UTCJul 25, 03:20 UTC25m
2026-07-25 CHH7663 SYX → WUH Jul 25, 00:30 UTCJul 25, 01:05 UTC35m
2026-07-24 CHH7663 SYX → WUH Jul 24, 03:15 UTCJul 25, 01:05 UTC21h 50m
2026-07-23 CHH7477 PEK → HGH Jul 23, 04:10 UTCJul 23, 04:20 UTC10m
2026-07-22 CHH7397 - Jul 22, 15:20 UTCJul 22, 15:30 UTC10m
2026-07-22 CHH7772 - Jul 22, 12:10 UTCJul 22, 12:30 UTC20m
2026-07-22 CHH7175 - Jul 22, 00:05 UTCJul 22, 00:15 UTC10m
2026-07-21 CHH7730 RIZ → SZX Jul 21, 17:00 UTCJul 21, 17:10 UTC10m
2026-07-21 CHH7729 - Jul 21, 06:55 UTCJul 21, 07:05 UTC10m
2026-07-20 CHH7739 SZX → TYN Jul 20, 22:35 UTCJul 20, 22:45 UTC10m
2026-07-20 CHH7027 - Jul 20, 14:30 UTCJul 20, 14:55 UTC25m
2026-07-20 CHH7016 SZX → HAK Jul 20, 10:45 UTCJul 20, 11:05 UTC20m
2026-07-19 CHH7015 - Jul 19, 11:45 UTCJul 19, 11:55 UTC10m
2026-07-19 CHH720 - Jul 19, 08:30 UTCJul 19, 08:40 UTC10m
2026-07-19 CHH719 HAK → HKG Jul 19, 06:20 UTCJul 19, 06:40 UTC20m
2026-07-19 CHH706 - Jul 19, 03:05 UTCJul 19, 03:10 UTC5m
2026-07-19 CHH705 HAK → HKG Jul 19, 00:20 UTCJul 19, 00:35 UTC15m
2026-07-18 CHH720 - Jul 18, 08:35 UTCJul 18, 08:50 UTC15m
2026-07-18 CHH719 HAK → HKG Jul 18, 06:15 UTCJul 18, 07:05 UTC50m
2026-07-17 CHH6333 - Jul 17, 09:04 UTCJul 17, 09:25 UTC20m
2026-07-13 CHH7289 - Jul 13, 23:40 UTCJul 14, 13:30 UTC13h 50m
2026-07-13 CHH7134 - Jul 13, 15:30 UTCJul 13, 15:50 UTC20m
2026-07-13 CHH7133 - Jul 13, 12:15 UTCJul 13, 12:35 UTC20m
2026-07-13 CHH7235 - Jul 13, 03:15 UTCJul 13, 03:25 UTC10m
2026-07-09 CHH748 - Jul 9, 04:10 UTCJul 9, 04:40 UTC30m
2026-07-09 CHH747 - Jul 9, 02:05 UTCJul 9, 02:35 UTC30m
2026-07-08 CHH7654 - Jul 8, 15:25 UTCJul 8, 16:10 UTC45m
2026-07-08 CHH7653 - Jul 8, 12:55 UTCJul 8, 13:35 UTC40m
2026-07-08 CHH7320 - Jul 8, 02:20 UTCJul 8, 09:50 UTC7h 30m
2026-07-07 CHH748 - Jul 7, 04:10 UTCJul 8, 02:45 UTC22h 35m
2026-07-07 CHH747 - Jul 7, 02:10 UTCJul 7, 02:40 UTC30m
2026-07-06 CHH747 - Jul 6, 04:15 UTCJul 7, 02:40 UTC22h 25m
2026-07-06 CHH747 - Jul 6, 02:00 UTCJul 6, 02:30 UTC30m
2026-07-05 CHH7582 - Jul 5, 11:20 UTCJul 5, 11:45 UTC25m
2026-07-04 CHH7185 - Jul 4, 23:10 UTCJul 4, 23:25 UTC15m
2026-07-04 CHH7646 - Jul 4, 16:55 UTCJul 4, 17:05 UTC10m
2026-07-04 CHH7236 - Jul 4, 09:35 UTCJul 4, 09:50 UTC15m
2026-07-04 CHH7235 - Jul 4, 03:15 UTCJul 4, 03:35 UTC20m
2026-07-03 CHH7079 - Jul 3, 00:45 UTCJul 3, 06:40 UTC5h 55m
2026-07-02 CHH7134 - Jul 2, 15:20 UTCJul 2, 15:40 UTC20m
2026-07-02 CHH7133 - Jul 2, 12:20 UTCJul 2, 12:40 UTC20m
2026-07-02 CHH6211 - Jul 2, 02:10 UTCJul 2, 02:20 UTC10m
2026-07-01 CHH7193 - Jul 1, 12:05 UTCJul 1, 12:25 UTC20m
2026-07-01 CHH7235 - Jul 1, 03:30 UTCJul 1, 03:50 UTC20m
2026-06-30 CHH7468 - Jun 30, 08:55 UTCJun 30, 09:05 UTC10m
2026-06-27 CHH7016 - Jun 27, 09:09 UTCJun 27, 09:19 UTC10m
2026-06-23 CHH7322 - Jun 23, 23:59 UTCJun 24, 04:44 UTC4h 45m
2026-06-23 CHH7322 - Jun 23, 05:09 UTCJun 24, 01:09 UTC20h 0m
2026-06-22 CHH7272 KWE → CAN Jun 22, 04:19 UTCJun 22, 14:49 UTC10h 30m
2026-06-22 CHH7022 CAN → SYX Jun 22, 01:10 UTCJun 22, 01:19 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-1215 page for operator, model, and routing details .

Mode-S 781317 frequently asked

What is Mode-S code 781317?
781317 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1215.
Where is Mode-S 781317 registered?
Mode-S code 781317 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781317 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 03:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781317, octal 36011427, decimal 7,869,207.
What flights does 781317 operate?
Mode-S 781317 has broadcast 20 distinct callsigns, including CHH7872, CHH7871, CHH747, CHH7322, CHH7235.