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 6d ago
Flights observed
105
Distinct callsigns
20
Country
CN
Last broadcast
6d 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 - 6 2026-06-12
CHH7468 Hainan Airlines 4 2026-05-08
CHH7275 - 4 2026-06-24
CHH7745 - 3 2026-06-12
CHH7698 - 3 2026-07-02
CHH7671 - 3 2026-04-26
CHH7982 Hainan Airlines 2 2026-04-18
CHH7981 Hainan Airlines 2 2026-04-18
CHH7765 - 2 2026-06-27
CHH7762 - 2 2026-06-24
CHH7761 - 2 2026-06-23
CHH7760 - 2 2026-06-26
CHH7759 - 2 2026-06-27
CHH7736 - 2 2026-06-27
CHH7735 - 2 2026-06-17
CHH7730 - 2 2026-06-25
CHH7726 Hainan Airlines 2 2026-05-21
CHH7644 Hainan Airlines 2 2026-04-23
CHH7374 Hainan Airlines 2 2026-05-30
CHH7308 Hainan Airlines 2 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 CHH7215 - Jul 8, 05:35 UTCJul 8, 12:20 UTC6h 45m
2026-07-07 CHH7204 - Jul 7, 16:40 UTCJul 7, 16:50 UTC10m
2026-07-04 CHH720 - Jul 4, 08:30 UTCJul 4, 08:45 UTC15m
2026-07-04 CHH719 - Jul 4, 06:25 UTCJul 4, 06:30 UTC5m
2026-07-03 CHH7741 - Jul 3, 04:25 UTCJul 3, 04:35 UTC10m
2026-07-03 CHH7742 - Jul 3, 02:00 UTCJul 3, 02:10 UTC10m
2026-07-02 CHH7698 - Jul 2, 05:05 UTCJul 2, 09:10 UTC4h 5m
2026-07-01 CHH7698 - Jul 1, 09:05 UTCJul 2, 05:25 UTC20h 20m
2026-07-01 CHH7698 - Jul 1, 05:15 UTCJul 1, 09:15 UTC4h 0m
2026-06-28 CHH7766 - Jun 28, 13:29 UTCJun 28, 13:40 UTC10m
2026-06-27 CHH7765 - Jun 27, 23:34 UTCJun 27, 23:55 UTC20m
2026-06-27 CHH7759 - Jun 27, 09:00 UTCJun 27, 09:15 UTC15m
2026-06-27 CHH7759 - Jun 27, 06:30 UTCJun 27, 06:40 UTC10m
2026-06-27 CHH7736 - Jun 27, 04:54 UTCJun 27, 05:04 UTC10m
2026-06-26 CHH7760 - Jun 26, 16:00 UTCJun 26, 16:14 UTC15m
2026-06-26 CHH7760 - Jun 26, 09:20 UTCJun 26, 13:49 UTC4h 30m
2026-06-25 CHH7767 - Jun 25, 23:39 UTCJun 26, 00:30 UTC50m
2026-06-25 CHH7730 - Jun 25, 17:30 UTCJun 25, 17:39 UTC10m
2026-06-25 CHH7729 - Jun 25, 07:15 UTCJun 25, 07:25 UTC10m
2026-06-25 CHH7736 - Jun 25, 05:25 UTCJun 25, 05:35 UTC10m
2026-06-24 CHH7276 - Jun 24, 13:50 UTCJun 24, 14:00 UTC10m
2026-06-24 CHH7275 - Jun 24, 07:24 UTCJun 24, 07:34 UTC10m
2026-06-24 CHH7762 - Jun 24, 04:59 UTCJun 24, 05:20 UTC20m
2026-06-23 CHH7761 - Jun 23, 22:49 UTCJun 23, 23:00 UTC10m
2026-06-23 CHH6206 - Jun 23, 14:49 UTCJun 23, 16:05 UTC1h 15m
2026-06-23 CHH6205 - Jun 23, 09:14 UTCJun 23, 09:24 UTC10m
2026-06-22 CHH7870 - Jun 22, 23:55 UTCJun 23, 00:04 UTC10m
2026-06-21 CHH7569 - Jun 21, 02:24 UTCJun 21, 02:40 UTC15m
2026-06-19 CHH7874 - Jun 19, 12:59 UTCJun 19, 13:09 UTC10m
2026-06-19 - - Jun 19, 11:30 UTCJun 19, 11:39 UTC10m
2026-06-19 CHH7702 - Jun 19, 03:34 UTCJun 19, 03:44 UTC10m
2026-06-18 CHH7730 RIZ → SZX Jun 18, 22:20 UTCJun 18, 22:40 UTC20m
2026-06-17 CHH7735 - Jun 17, 22:35 UTCJun 17, 22:45 UTC10m
2026-06-17 CHH7275 - Jun 17, 08:05 UTCJun 17, 08:15 UTC10m
2026-06-17 CHH7762 - Jun 17, 05:20 UTCJun 17, 05:30 UTC10m
2026-06-16 CHH7276 TFU → SZX Jun 16, 15:15 UTCJun 16, 15:24 UTC10m
2026-06-16 CHH7275 - Jun 16, 07:05 UTCJun 16, 07:15 UTC10m
2026-06-15 CHH7735 - Jun 15, 22:45 UTCJun 15, 22:54 UTC10m
2026-06-15 CHH7275 - Jun 15, 12:19 UTCJun 15, 12:30 UTC10m
2026-06-14 CHH7761 SZX → NGB Jun 14, 23:15 UTCJun 14, 23:25 UTC10m
2026-06-14 CHH7027 HAK → SZX Jun 14, 16:20 UTCJun 14, 16:30 UTC10m
2026-06-14 CHH7371 HAK → CKG Jun 14, 07:05 UTCJun 14, 11:25 UTC4h 20m
2026-06-14 CHH7030 NNG → HAK Jun 14, 04:50 UTCJun 14, 05:05 UTC15m
2026-06-13 CHH7716 TNA → SZX Jun 13, 12:50 UTCJun 13, 13:00 UTC10m
2026-06-13 CHH7376 TFU → SZX Jun 13, 10:55 UTCJun 13, 11:10 UTC15m
2026-06-13 CHH7375 SZX → TFU Jun 13, 05:15 UTCJun 13, 05:25 UTC10m
2026-06-12 CHH7737 SZX → NNY Jun 12, 23:00 UTCJun 12, 23:10 UTC10m
2026-06-12 CHH7746 - Jun 12, 14:40 UTCJun 12, 14:55 UTC15m
2026-06-12 CHH7746 - Jun 12, 10:00 UTCJun 12, 10:25 UTC25m
2026-06-12 CHH7745 - Jun 12, 03:45 UTCJun 12, 03:55 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-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 6d 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, CHH7275, CHH7745, CHH7698.