Apparatus

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sensors Mode-S transponder

7804A0

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5406 · BOEING 737-800

Hex
7804A0
Octal
36002240
Decimal
7,865,504
Country
CN
Tail
B-5406
Type
B738
No current signal · last broadcast Jul 24, 08:40 UTC
Flights observed
151
Distinct callsigns
20
Country
CN
Last broadcast
Jul 24, 08:40 UTC

Last known position

Most recent position reported by Mode-S 7804A0.

Country allocation

The ICAO 24-bit address 7804A0 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
CHH459 - 9 2026-06-28
CHH460 - 8 2026-06-29
CHH7386 Hainan Airlines 7 2026-04-24
CHH7726 Hainan Airlines 4 2026-07-21
CHH7725 Hainan Airlines 4 2026-07-21
CHH7120 Hainan Airlines 4 2026-04-27
CHH7987 - 3 2026-07-13
CHH7156 Hainan Airlines 3 2026-07-17
CHH7027 - 3 2026-07-22
CHH440 - 3 2026-06-20
CHH7988 - 2 2026-07-13
CHH7805 - 2 2026-07-09
CHH7741 - 2 2026-07-04
CHH7711 Hainan Airlines 2 2026-06-04
CHH7709 - 2 2026-06-25
CHH7705 - 2 2026-06-21
CHH7688 - 2 2026-07-05
CHH7654 Hainan Airlines 2 2026-05-05
CHH7397 - 2 2026-07-16
CHH7297 Hainan Airlines 2 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CHH720 HKG → HAK Jul 24, 08:25 UTCJul 24, 08:40 UTC15m
2026-07-24 CHH719 HAK → HKG Jul 24, 06:20 UTCJul 24, 06:35 UTC15m
2026-07-24 CHH706 HKG → HAK Jul 24, 02:40 UTCJul 24, 02:55 UTC15m
2026-07-24 CHH705 HAK → HKG Jul 24, 00:20 UTCJul 24, 00:25 UTC5m
2026-07-23 CHH7026 SZX → HAK Jul 23, 13:30 UTCJul 23, 13:45 UTC15m
2026-07-23 CHH7375 SZX → TFU Jul 23, 06:15 UTCJul 23, 06:25 UTC10m
2026-07-23 CHH7738 NNY → SZX Jul 23, 04:25 UTCJul 23, 04:35 UTC10m
2026-07-22 CHH7737 SZX → NNY Jul 22, 23:50 UTCJul 23, 00:00 UTC10m
2026-07-22 CHH7027 - Jul 22, 14:35 UTCJul 22, 14:50 UTC15m
2026-07-21 CHH7725 SZX → PVG Jul 21, 05:20 UTCJul 21, 05:30 UTC10m
2026-07-21 CHH7726 PVG → SZX Jul 21, 01:25 UTCJul 21, 02:05 UTC40m
2026-07-20 CHH7725 SZX → PVG Jul 20, 05:05 UTCJul 20, 05:20 UTC15m
2026-07-20 CHH7726 PVG → SZX Jul 20, 02:10 UTCJul 20, 02:25 UTC15m
2026-07-19 CHH7725 SZX → PVG Jul 19, 06:40 UTCJul 19, 06:50 UTC10m
2026-07-19 CHH7726 - Jul 19, 00:35 UTCJul 19, 01:55 UTC1h 20m
2026-07-18 CHH7475 - Jul 18, 08:05 UTCJul 18, 08:15 UTC10m
2026-07-18 CHH7394 HGH → SZX Jul 18, 05:55 UTCJul 18, 06:10 UTC15m
2026-07-17 CHH7393 - Jul 17, 23:55 UTCJul 18, 00:04 UTC10m
2026-07-17 CHH7734 CGO → SZX Jul 17, 17:20 UTCJul 17, 17:30 UTC10m
2026-07-17 CHH7733 - Jul 17, 11:45 UTCJul 17, 11:55 UTC10m
2026-07-17 CHH7156 NKG → SZX Jul 17, 07:50 UTCJul 17, 08:15 UTC25m
2026-07-17 CHH7155 - Jul 17, 03:20 UTCJul 17, 03:30 UTC10m
2026-07-17 CHH7398 - Jul 17, 00:14 UTCJul 17, 00:30 UTC15m
2026-07-16 CHH7397 - Jul 16, 15:00 UTCJul 16, 15:10 UTC10m
2026-07-16 CHH7731 - Jul 16, 00:00 UTCJul 16, 00:15 UTC15m
2026-07-15 CHH7027 - Jul 15, 18:20 UTCJul 15, 18:55 UTC35m
2026-07-15 CHH6335 - Jul 15, 09:20 UTCJul 15, 09:35 UTC15m
2026-07-13 CHH7337 - Jul 13, 14:10 UTCJul 13, 14:30 UTC20m
2026-07-13 CHH7988 - Jul 13, 05:15 UTCJul 13, 05:50 UTC35m
2026-07-13 CHH7987 - Jul 13, 02:25 UTCJul 13, 02:55 UTC30m
2026-07-13 CHH7987 - Jul 13, 00:10 UTCJul 13, 00:20 UTC10m
2026-07-10 CHH7668 - Jul 10, 05:15 UTCJul 10, 09:25 UTC4h 10m
2026-07-09 CHH7805 - Jul 9, 03:25 UTCJul 9, 03:40 UTC15m
2026-07-08 CHH7109 - Jul 8, 09:25 UTCJul 8, 09:40 UTC15m
2026-07-07 CHH7185 - Jul 7, 23:00 UTCJul 7, 23:20 UTC20m
2026-07-06 CHH7027 - Jul 6, 16:00 UTCJul 6, 16:15 UTC15m
2026-07-05 CHH7688 - Jul 5, 23:25 UTCJul 6, 11:25 UTC12h 0m
2026-07-05 CHH784 - Jul 5, 17:05 UTCJul 5, 17:35 UTC30m
2026-07-05 CHH783 - Jul 5, 15:20 UTCJul 5, 15:35 UTC15m
2026-07-05 CHH720 - Jul 5, 08:15 UTCJul 5, 08:30 UTC15m
2026-07-05 CHH719 - Jul 5, 06:10 UTCJul 5, 06:30 UTC20m
2026-07-05 CHH706 - Jul 5, 02:30 UTCJul 5, 02:45 UTC15m
2026-07-05 CHH705 - Jul 5, 00:15 UTCJul 5, 00:35 UTC20m
2026-07-04 CHH7741 - Jul 4, 04:15 UTCJul 4, 04:25 UTC10m
2026-07-04 CHH7742 - Jul 4, 02:00 UTCJul 4, 02:25 UTC25m
2026-07-02 CHH7372 - Jul 2, 07:10 UTCJul 2, 11:45 UTC4h 35m
2026-06-29 CHH460 - Jun 29, 09:00 UTCJun 29, 09:40 UTC40m
2026-06-28 CHH459 - Jun 28, 14:19 UTCJun 29, 07:09 UTC16h 50m
2026-06-28 CHH459 - Jun 28, 11:29 UTCJun 29, 07:09 UTC19h 40m
2026-06-28 CHH460 - Jun 28, 08:44 UTCJun 29, 07:09 UTC22h 25m

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-5406 page for operator, model, and routing details .

Mode-S 7804A0 frequently asked

What is Mode-S code 7804A0?
7804A0 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5406.
Where is Mode-S 7804A0 registered?
Mode-S code 7804A0 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7804A0 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 08:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7804A0, octal 36002240, decimal 7,865,504.
What flights does 7804A0 operate?
Mode-S 7804A0 has broadcast 20 distinct callsigns, including CHH459, CHH460, CHH7386, CHH7726, CHH7725.