sensors Mode-S transponder
7812FF
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1381 · BOEING 737 MAX 8
- Hex
- 7812FF
- Octal
- 36011377
- Decimal
- 7,869,183
- Country
- CN
- Tail
- B-1381
- Type
- B38M
- Flights observed
- 84
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 12h ago
Last known position
Country allocation
The ICAO 24-bit address 7812FF 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 |
|---|---|---|---|
| CSH858 | Shanghai Airlines | 10 | 2026-05-28 |
| CSH833 | Shanghai Airlines | 9 | 2026-05-10 |
| CSH857 | Shanghai Airlines | 7 | 2026-05-27 |
| CSH853 | Shanghai Airlines | 7 | 2026-05-21 |
| CSH834 | Shanghai Airlines | 7 | 2026-05-27 |
| CSH847 | Shanghai Airlines | 5 | 2026-05-26 |
| CSH811 | Shanghai Airlines | 5 | 2026-05-21 |
| CSH841 | Shanghai Airlines | 4 | 2026-05-17 |
| CSH878 | Shanghai Airlines | 3 | 2026-04-18 |
| CSH877 | Shanghai Airlines | 3 | 2026-05-22 |
| CSH862 | Shanghai Airlines | 3 | 2026-05-20 |
| CSH854 | Shanghai Airlines | 3 | 2026-05-13 |
| CSH848 | Shanghai Airlines | 3 | 2026-05-26 |
| CSH842 | Shanghai Airlines | 3 | 2026-05-02 |
| CSH863 | Shanghai Airlines | 2 | 2026-05-25 |
| CSH861 | Shanghai Airlines | 2 | 2026-05-20 |
| CSH856 | Shanghai Airlines | 2 | 2026-05-05 |
| CSH812 | Shanghai Airlines | 2 | 2026-05-21 |
| CSH9255 | Shanghai Airlines | 1 | 2026-05-23 |
| CSH864 | Shanghai Airlines | 1 | 2026-05-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | CSH858 | HKT → PVG | May 28, 16:40 UTC | May 29, 13:35 UTC | 20h 55m |
| 2026-05-28 | CSH858 | HKT → PVG | May 28, 11:25 UTC | May 28, 20:00 UTC | 8h 35m |
| 2026-05-27 | CSH857 | PVG → HKT | May 27, 11:50 UTC | May 28, 11:40 UTC | 23h 50m |
| 2026-05-27 | CSH834 | BKK → PVG | May 27, 10:10 UTC | May 27, 12:30 UTC | 2h 20m |
| 2026-05-26 | CSH848 | BKK → PVG | May 26, 22:15 UTC | May 27, 08:10 UTC | 9h 55m |
| 2026-05-26 | CSH847 | PVG → BKK | May 26, 10:25 UTC | May 26, 20:29 UTC | 10h 5m |
| 2026-05-25 | CSH864 | KUL → PVG | May 25, 23:00 UTC | May 26, 18:30 UTC | 19h 30m |
| 2026-05-25 | CSH863 | PVG → KUL | May 25, 08:45 UTC | May 25, 21:35 UTC | 12h 49m |
| 2026-05-24 | CSH863 | PVG → KUL | May 24, 20:05 UTC | May 25, 18:25 UTC | 22h 20m |
| 2026-05-24 | CSH858 | HKT → PVG | May 24, 17:50 UTC | May 25, 17:45 UTC | 23h 55m |
| 2026-05-24 | CSH858 | HKT → PVG | May 24, 14:35 UTC | May 25, 09:25 UTC | 18h 50m |
| 2026-05-24 | CSH857 | PVG → HKT | May 24, 13:00 UTC | May 25, 09:25 UTC | 20h 25m |
| 2026-05-24 | CSH857 | PVG → HKT | May 24, 02:50 UTC | May 24, 21:10 UTC | 18h 20m |
| 2026-05-23 | CSH9255 | PVG → HAK | May 23, 03:50 UTC | May 24, 03:20 UTC | 23h 31m |
| 2026-05-22 | CSH877 | PVG → PEN | May 22, 13:20 UTC | May 23, 04:45 UTC | 15h 24m |
| 2026-05-22 | CSH877 | PVG → PEN | May 22, 05:05 UTC | May 23, 03:45 UTC | 22h 39m |
| 2026-05-22 | CSH877 | PVG → PEN | May 22, 03:00 UTC | May 22, 20:05 UTC | 17h 5m |
| 2026-05-21 | CSH853 | PVG → BKK | May 21, 14:05 UTC | May 21, 14:40 UTC | 35m |
| 2026-05-21 | CSH812 | HKG → PVG | May 21, 06:20 UTC | May 21, 12:30 UTC | 6h 10m |
| 2026-05-21 | CSH811 | PVG → HKG | May 21, 04:05 UTC | May 21, 04:20 UTC | 15m |
| 2026-05-20 | CSH862 | KUL → PVG | May 20, 17:55 UTC | May 21, 03:30 UTC | 9h 35m |
| 2026-05-20 | CSH861 | PVG → KUL | May 20, 12:05 UTC | May 20, 16:15 UTC | 4h 10m |
| 2026-05-18 | CSH862 | KUL → PVG | May 18, 18:10 UTC | May 18, 22:25 UTC | 4h 14m |
| 2026-05-18 | CSH861 | PVG → KUL | May 18, 05:00 UTC | May 18, 16:15 UTC | 11h 15m |
| 2026-05-17 | CSH841 | CGQ → PVG | May 17, 10:10 UTC | May 17, 18:25 UTC | 8h 15m |
| 2026-05-15 | CSH834 | BKK → PVG | May 15, 09:55 UTC | May 15, 12:50 UTC | 2h 55m |
| 2026-05-14 | CSH858 | HKT → PVG | May 14, 13:50 UTC | May 15, 08:25 UTC | 18h 35m |
| 2026-05-14 | CSH858 | HKT → PVG | May 14, 13:05 UTC | May 15, 08:25 UTC | 19h 20m |
| 2026-05-13 | CSH854 | BKK → PVG | May 13, 05:05 UTC | May 13, 07:20 UTC | 2h 15m |
| 2026-05-12 | CSH841 | CGQ → PVG | May 12, 16:25 UTC | May 12, 18:45 UTC | 2h 20m |
| 2026-05-10 | CSH834 | BKK → PVG | May 10, 10:15 UTC | May 10, 12:25 UTC | 2h 10m |
| 2026-05-10 | CSH833 | PVG → BKK | May 10, 05:40 UTC | May 10, 08:05 UTC | 2h 25m |
| 2026-05-09 | CSH833 | PVG → BKK | May 9, 12:15 UTC | May 10, 08:05 UTC | 19h 50m |
| 2026-05-09 | CSH833 | PVG → BKK | May 9, 10:15 UTC | May 10, 08:05 UTC | 21h 50m |
| 2026-05-08 | CSH833 | PVG → BKK | May 8, 22:15 UTC | May 9, 08:35 UTC | 10h 20m |
| 2026-05-08 | CSH847 | PVG → BKK | May 8, 07:14 UTC | May 8, 20:35 UTC | 13h 20m |
| 2026-05-07 | CSH858 | HKT → PVG | May 7, 11:50 UTC | May 8, 07:14 UTC | 19h 25m |
| 2026-05-07 | CSH857 | PVG → HKT | May 7, 11:30 UTC | May 8, 07:14 UTC | 19h 44m |
| 2026-05-07 | CSH857 | PVG → HKT | May 7, 03:00 UTC | May 7, 19:15 UTC | 16h 15m |
| 2026-05-06 | CSH841 | CGQ → PVG | May 6, 10:20 UTC | May 6, 18:35 UTC | 8h 14m |
| 2026-05-05 | CSH856 | BKK → PVG | May 5, 14:50 UTC | May 6, 10:45 UTC | 19h 55m |
| 2026-05-05 | CSH856 | BKK → PVG | May 5, 12:40 UTC | May 6, 10:45 UTC | 22h 5m |
| 2026-05-05 | CSH855 | PVG → BKK | May 5, 08:50 UTC | May 5, 11:10 UTC | 2h 20m |
| 2026-05-04 | CSH857 | PVG → HKT | May 4, 11:35 UTC | May 4, 19:15 UTC | 7h 41m |
| 2026-05-03 | CSH857 | PVG → HKT | May 3, 12:15 UTC | May 4, 11:45 UTC | 23h 30m |
| 2026-05-03 | CSH834 | BKK → PVG | May 3, 10:05 UTC | May 3, 12:15 UTC | 2h 10m |
| 2026-05-02 | CSH848 | BKK → PVG | May 2, 22:05 UTC | May 3, 08:30 UTC | 10h 24m |
| 2026-05-02 | CSH842 | BKK → PVG | May 2, 03:05 UTC | May 2, 20:35 UTC | 17h 30m |
| 2026-05-01 | CSH853 | PVG → BKK | May 1, 07:00 UTC | May 1, 15:00 UTC | 8h 0m |
| 2026-05-01 | CSH811 | PVG → HKG | May 1, 04:05 UTC | May 1, 04:30 UTC | 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-1381 page for operator, model, and routing details .