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
- Flights observed
- 21
- Distinct callsigns
- 13
- Country
- CN
- Last broadcast
- 5h ago
Last known position
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
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-11 | CXA8376 | NNG → XMN | Jun 11, 02:55 UTC | Jun 11, 03:10 UTC | 15m |
| 2026-06-10 | CXA8375 | XMN → NNG | Jun 10, 23:55 UTC | Jun 11, 00:20 UTC | 25m |
| 2026-06-04 | CXA8818 | HRB → HGH | Jun 4, 01:40 UTC | Jun 4, 10:00 UTC | 8h 20m |
| 2026-06-02 | CXA878 | ICN → FOC | Jun 2, 11:50 UTC | Jun 2, 12:15 UTC | 25m |
| 2026-06-02 | CXA877 | FOC → ICN | Jun 2, 09:10 UTC | Jun 2, 09:40 UTC | 30m |
| 2026-05-28 | CXA8093 | - | May 28, 10:50 UTC | May 28, 14:15 UTC | 3h 25m |
| 2026-05-24 | CXA8697 | FOC → HAN | May 24, 06:30 UTC | May 24, 10:45 UTC | 4h 15m |
| 2026-05-17 | CXA8842 | ZUH → FOC | May 17, 09:25 UTC | May 17, 09:35 UTC | 10m |
| 2026-05-17 | CXA8841 | FOC → ZUH | May 17, 07:50 UTC | May 17, 08:10 UTC | 20m |
| 2026-05-16 | CXA8361 | XMN → HAK | May 16, 10:20 UTC | May 16, 14:25 UTC | 4h 5m |
| 2026-05-15 | CXA8361 | XMN → HAK | May 15, 13:40 UTC | May 16, 10:46 UTC | 21h 5m |
| 2026-05-13 | CXA8781 | SHE → FOC | May 13, 04:15 UTC | May 13, 08:50 UTC | 4h 35m |
| 2026-05-12 | CXA8781 | SHE → FOC | May 12, 07:35 UTC | May 13, 04:40 UTC | 21h 5m |
| 2026-05-12 | CXA8781 | SHE → FOC | May 12, 04:05 UTC | May 12, 07:40 UTC | 3h 35m |
| 2026-05-11 | CXA8781 | SHE → FOC | May 11, 08:55 UTC | May 12, 07:40 UTC | 22h 45m |
| 2026-05-02 | CXA8781 | SHE → FOC | May 2, 23:20 UTC | May 3, 08:25 UTC | 9h 4m |
| 2026-05-02 | CXA8781 | SHE → FOC | May 2, 07:35 UTC | May 3, 04:30 UTC | 20h 54m |
| 2026-05-02 | CXA8781 | SHE → FOC | May 2, 04:10 UTC | May 3, 00:05 UTC | 19h 55m |
| 2026-04-27 | CXA8051 | - | Apr 27, 11:00 UTC | Apr 28, 02:30 UTC | 15h 30m |
| 2026-04-27 | CXA8051 | - | Apr 27, 07:00 UTC | Apr 28, 02:30 UTC | 19h 30m |
| 2026-04-27 | CXA8079 | XMN → DLC | Apr 27, 00:40 UTC | Apr 27, 11:00 UTC | 10h 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 .