Apparatus

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sensors Mode-S transponder

7800A7

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5371 · BOEING 737-800

Hex
7800A7
Octal
36000247
Decimal
7,864,487
Country
CN
Tail
B-5371
Type
B738
No current signal · last broadcast 6h ago
Flights observed
47
Distinct callsigns
20
Country
CN
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 7800A7.

Country allocation

The ICAO 24-bit address 7800A7 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
CHH7746 - 4 2026-05-21
CHH7468 Hainan Airlines 4 2026-05-08
CHH7671 - 3 2026-04-26
CHH7982 Hainan Airlines 2 2026-04-18
CHH7981 Hainan Airlines 2 2026-04-18
CHH7745 - 2 2026-05-21
CHH7726 Hainan Airlines 2 2026-05-21
CHH7644 Hainan Airlines 2 2026-04-23
CHH7016 Hainan Airlines 2 2026-05-09
CHH7815 Hainan Airlines 1 2026-05-28
CHH7765 Hainan Airlines 1 2026-05-21
CHH7725 Hainan Airlines 1 2026-05-20
CHH7688 Hainan Airlines 1 2026-04-29
CHH7672 - 1 2026-04-19
CHH7654 Hainan Airlines 1 2026-05-11
CHH7638 Hainan Airlines 1 2026-04-20
CHH7613 Hainan Airlines 1 2026-05-18
CHH7567 Hainan Airlines 1 2026-04-28
CHH7467 Hainan Airlines 1 2026-05-08
CHH7388 - 1 2026-05-29

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-05-29 CHH7388 - May 29, 14:45 UTCMay 30, 02:25 UTC11h 40m
2026-05-29 CHH7308 CAN → SYX May 29, 00:05 UTCMay 29, 00:15 UTC10m
2026-05-28 CHH7815 PEK → CAN May 28, 12:40 UTCMay 28, 13:00 UTC20m
2026-05-28 CHH7235 CAN → CGO May 28, 03:15 UTCMay 28, 03:40 UTC25m
2026-05-27 CHH7248 TFU → PEK May 27, 06:40 UTCMay 27, 06:49 UTC10m
2026-05-27 CHH7147 PEK → TFU May 27, 00:14 UTCMay 27, 00:34 UTC20m
2026-05-22 CHH7026 SZX → HAK May 22, 13:45 UTCMay 22, 14:00 UTC15m
2026-05-21 CHH7765 SZX → FUG May 21, 23:30 UTCMay 21, 23:40 UTC10m
2026-05-21 CHH7746 - May 21, 19:35 UTCMay 21, 19:50 UTC15m
2026-05-21 CHH7746 - May 21, 12:00 UTCMay 21, 12:25 UTC25m
2026-05-21 CHH7745 - May 21, 06:00 UTCMay 21, 06:15 UTC15m
2026-05-21 CHH7726 PVG → SZX May 21, 01:50 UTCMay 21, 02:00 UTC10m
2026-05-20 CHH7725 SZX → PVG May 20, 04:50 UTCMay 20, 05:00 UTC10m
2026-05-20 CHH7726 PVG → SZX May 20, 01:50 UTCMay 20, 02:05 UTC15m
2026-05-18 CHH7613 PEK → PVG May 18, 23:55 UTCMay 19, 00:05 UTC10m
2026-05-18 CHH7298 TYN → CAN May 18, 13:45 UTCMay 18, 14:05 UTC20m
2026-05-17 CHH460 SIN → HAK May 17, 08:45 UTCMay 17, 09:15 UTC30m
2026-05-17 CHH459 HAK → SIN May 17, 06:00 UTCMay 17, 06:20 UTC20m
2026-05-11 CHH7654 JUH → TYN May 11, 12:15 UTCMay 11, 15:40 UTC3h 25m
2026-05-10 CHH7012 CAN → HAK May 10, 15:05 UTCMay 10, 15:19 UTC15m
2026-05-09 CHH7016 SZX → HAK May 9, 08:30 UTCMay 9, 08:50 UTC20m
2026-05-08 CHH7468 ZUH → HGH May 8, 09:09 UTCMay 8, 09:25 UTC15m
2026-05-08 CHH7467 HGH → ZUH May 8, 07:39 UTCMay 8, 07:59 UTC20m
2026-05-07 CHH7468 ZUH → HGH May 7, 08:15 UTCMay 7, 08:25 UTC10m
2026-05-06 CHH7468 ZUH → HGH May 6, 08:01 UTCMay 6, 08:10 UTC10m
2026-05-05 CHH7468 ZUH → HGH May 5, 08:10 UTCMay 5, 08:20 UTC10m
2026-05-04 CHH7015 HAK → SZX May 4, 11:25 UTCMay 4, 11:40 UTC15m
2026-04-29 CHH7688 NGB → HAK Apr 29, 23:55 UTCApr 30, 10:20 UTC10h 25m
2026-04-29 CHH7028 SZX → HAK Apr 29, 16:00 UTCApr 29, 16:15 UTC15m
2026-04-29 CHH7746 - Apr 29, 13:25 UTCApr 29, 13:40 UTC15m
2026-04-29 CHH7746 - Apr 29, 08:50 UTCApr 29, 09:10 UTC21m
2026-04-29 CHH7745 - Apr 29, 02:30 UTCApr 29, 02:40 UTC10m
2026-04-28 CHH7567 PEK → CKG Apr 28, 11:05 UTCApr 28, 11:20 UTC15m
2026-04-27 CHH7016 SZX → HAK Apr 27, 01:30 UTCApr 27, 10:10 UTC8h 40m
2026-04-26 CHH7671 - Apr 26, 07:00 UTCApr 26, 07:30 UTC30m
2026-04-23 CHH7644 ZUH → HFE Apr 23, 14:10 UTCApr 23, 14:20 UTC10m
2026-04-21 CHH7644 ZUH → HFE Apr 21, 09:50 UTCApr 21, 10:00 UTC10m
2026-04-20 CHH7638 ZUH → CGO Apr 20, 06:20 UTCApr 20, 06:30 UTC10m
2026-04-19 CHH7672 - Apr 19, 15:00 UTCApr 19, 15:30 UTC30m
2026-04-19 CHH7671 - Apr 19, 06:55 UTCApr 19, 07:20 UTC25m
2026-04-18 CHH7671 - Apr 18, 11:30 UTCApr 19, 07:20 UTC19h 50m
2026-04-18 CHH7982 TPE → CAN Apr 18, 05:25 UTCApr 18, 05:40 UTC15m
2026-04-18 CHH7982 TPE → CAN Apr 18, 04:05 UTCApr 18, 04:40 UTC35m
2026-04-18 CHH7981 CAN → TPE Apr 18, 01:25 UTCApr 18, 02:05 UTC40m
2026-04-18 CHH7981 CAN → TPE Apr 18, 00:45 UTCApr 18, 01:10 UTC25m
2026-04-13 CHH720 - Apr 13, 08:20 UTCApr 13, 08:30 UTC10m
2026-04-13 CHH719 HAK → HKG Apr 13, 06:35 UTCApr 13, 06:55 UTC20m

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-5371 page for operator, model, and routing details .

Mode-S 7800A7 frequently asked

What is Mode-S code 7800A7?
7800A7 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5371.
Where is Mode-S 7800A7 registered?
Mode-S code 7800A7 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7800A7 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7800A7, octal 36000247, decimal 7,864,487.
What flights does 7800A7 operate?
Mode-S 7800A7 has broadcast 20 distinct callsigns, including CHH7746, CHH7468, CHH7671, CHH7982, CHH7981.