sensors Mode-S transponder

7812BF

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1352 · BOEING 737-800

Hex
7812BF
Octal
36011277
Decimal
7,869,119
Country
CN
Tail
B-1352
Type
B738
No current signal · last broadcast 5h ago
Flights observed
21
Distinct callsigns
13
Country
CN
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 7812BF.

Country allocation

The ICAO 24-bit address 7812BF 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 13 distinct

Callsign Airline Flights Last seen
CXA8781 Xiamen Airlines 7 2026-05-13
CXA8361 Xiamen Airlines 2 2026-05-16
CXA8051 - 2 2026-04-27
CXA8842 Xiamen Airlines 1 2026-05-17
CXA8841 Xiamen Airlines 1 2026-05-17
CXA8818 Xiamen Airlines 1 2026-06-04
CXA878 Xiamen Airlines 1 2026-06-02
CXA877 Xiamen Airlines 1 2026-06-02
CXA8697 Xiamen Airlines 1 2026-05-24
CXA8376 Xiamen Airlines 1 2026-06-11
CXA8375 Xiamen Airlines 1 2026-06-10
CXA8093 - 1 2026-05-28
CXA8079 Xiamen Airlines 1 2026-04-27

Recent flights last 21

DateFlightRouteTakeoffLandingDuration
2026-06-11 CXA8376 NNG → XMN Jun 11, 02:55 UTCJun 11, 03:10 UTC15m
2026-06-10 CXA8375 XMN → NNG Jun 10, 23:55 UTCJun 11, 00:20 UTC25m
2026-06-04 CXA8818 HRB → HGH Jun 4, 01:40 UTCJun 4, 10:00 UTC8h 20m
2026-06-02 CXA878 ICN → FOC Jun 2, 11:50 UTCJun 2, 12:15 UTC25m
2026-06-02 CXA877 FOC → ICN Jun 2, 09:10 UTCJun 2, 09:40 UTC30m
2026-05-28 CXA8093 - May 28, 10:50 UTCMay 28, 14:15 UTC3h 25m
2026-05-24 CXA8697 FOC → HAN May 24, 06:30 UTCMay 24, 10:45 UTC4h 15m
2026-05-17 CXA8842 ZUH → FOC May 17, 09:25 UTCMay 17, 09:35 UTC10m
2026-05-17 CXA8841 FOC → ZUH May 17, 07:50 UTCMay 17, 08:10 UTC20m
2026-05-16 CXA8361 XMN → HAK May 16, 10:20 UTCMay 16, 14:25 UTC4h 5m
2026-05-15 CXA8361 XMN → HAK May 15, 13:40 UTCMay 16, 10:46 UTC21h 5m
2026-05-13 CXA8781 SHE → FOC May 13, 04:15 UTCMay 13, 08:50 UTC4h 35m
2026-05-12 CXA8781 SHE → FOC May 12, 07:35 UTCMay 13, 04:40 UTC21h 5m
2026-05-12 CXA8781 SHE → FOC May 12, 04:05 UTCMay 12, 07:40 UTC3h 35m
2026-05-11 CXA8781 SHE → FOC May 11, 08:55 UTCMay 12, 07:40 UTC22h 45m
2026-05-02 CXA8781 SHE → FOC May 2, 23:20 UTCMay 3, 08:25 UTC9h 4m
2026-05-02 CXA8781 SHE → FOC May 2, 07:35 UTCMay 3, 04:30 UTC20h 54m
2026-05-02 CXA8781 SHE → FOC May 2, 04:10 UTCMay 3, 00:05 UTC19h 55m
2026-04-27 CXA8051 - Apr 27, 11:00 UTCApr 28, 02:30 UTC15h 30m
2026-04-27 CXA8051 - Apr 27, 07:00 UTCApr 28, 02:30 UTC19h 30m
2026-04-27 CXA8079 XMN → DLC Apr 27, 00:40 UTCApr 27, 11:00 UTC10h 20m

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-1352 page for operator, model, and routing details .

Mode-S 7812BF frequently asked

What is Mode-S code 7812BF?
7812BF is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1352.
Where is Mode-S 7812BF registered?
Mode-S code 7812BF is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7812BF broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7812BF, octal 36011277, decimal 7,869,119.
What flights does 7812BF operate?
Mode-S 7812BF has broadcast 13 distinct callsigns, including CXA8781, CXA8361, CXA8051, CXA8842, CXA8841.