sensors Mode-S transponder
781371
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1261 · BOEING 737 MAX 8
- Hex
- 781371
- Octal
- 36011561
- Decimal
- 7,869,297
- Country
- CN
- Tail
- B-1261
- Type
- B38M
- Flights observed
- 59
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 21h ago
Last known position
Country allocation
The ICAO 24-bit address 781371 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 |
|---|---|---|---|
| CSH831 | Shanghai Airlines | 8 | 2026-05-13 |
| CSH832 | Shanghai Airlines | 6 | 2026-04-21 |
| CSH9253 | Shanghai Airlines | 5 | 2026-05-27 |
| CSH9255 | Shanghai Airlines | 4 | 2026-04-16 |
| CSH853 | Shanghai Airlines | 4 | 2026-04-25 |
| CSH811 | Shanghai Airlines | 4 | 2026-04-25 |
| CSH862 | Shanghai Airlines | 3 | 2026-04-29 |
| CSH840 | Shanghai Airlines | 3 | 2026-05-12 |
| CSH866 | Shanghai Airlines | 2 | 2026-05-03 |
| CSH865 | Shanghai Airlines | 2 | 2026-05-03 |
| CSH861 | Shanghai Airlines | 2 | 2026-04-24 |
| CSH856 | Shanghai Airlines | 2 | 2026-04-22 |
| CSH854 | Shanghai Airlines | 2 | 2026-04-29 |
| CSH842 | Shanghai Airlines | 2 | 2026-04-26 |
| CSH839 | Shanghai Airlines | 2 | 2026-05-11 |
| CSH812 | Shanghai Airlines | 2 | 2026-04-28 |
| CSH9256 | - | 1 | 2026-04-13 |
| CSH9254 | Shanghai Airlines | 1 | 2026-05-29 |
| CSH9251 | Shanghai Airlines | 1 | 2026-05-22 |
| CSH9068 | Shanghai Airlines | 1 | 2026-04-26 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CSH9254 | HAK → SHA | May 29, 10:55 UTC | May 29, 14:20 UTC | 3h 25m |
| 2026-05-27 | CSH9253 | SHA → HAK | May 27, 10:35 UTC | May 27, 14:00 UTC | 3h 25m |
| 2026-05-26 | CSH9253 | SHA → HAK | May 26, 11:09 UTC | May 26, 14:35 UTC | 3h 25m |
| 2026-05-25 | CSH9253 | SHA → HAK | May 25, 10:40 UTC | May 25, 14:30 UTC | 3h 50m |
| 2026-05-23 | CSH9253 | SHA → HAK | May 23, 10:45 UTC | May 23, 14:30 UTC | 3h 45m |
| 2026-05-22 | CSH9251 | PVG → HAK | May 22, 04:35 UTC | May 22, 07:35 UTC | 3h 0m |
| 2026-05-20 | CSH9253 | SHA → HAK | May 20, 10:40 UTC | May 20, 11:00 UTC | 20m |
| 2026-05-13 | CSH831 | PVG → HKT | May 13, 03:20 UTC | May 13, 20:05 UTC | 16h 45m |
| 2026-05-12 | CSH831 | PVG → HKT | May 12, 17:25 UTC | May 13, 14:45 UTC | 21h 20m |
| 2026-05-12 | CSH840 | BKK → PVG | May 12, 15:20 UTC | May 13, 14:15 UTC | 22h 55m |
| 2026-05-11 | CSH839 | PVG → BKK | May 11, 19:40 UTC | May 12, 13:45 UTC | 18h 5m |
| 2026-05-11 | CSH877 | PVG → PEN | May 11, 09:05 UTC | May 12, 04:45 UTC | 19h 41m |
| 2026-05-03 | CSH866 | KUL → PVG | May 3, 13:15 UTC | May 3, 13:25 UTC | 10m |
| 2026-05-03 | CSH865 | PVG → KUL | May 3, 11:30 UTC | May 3, 11:55 UTC | 25m |
| 2026-05-01 | CSH866 | KUL → PVG | May 1, 13:15 UTC | May 2, 08:00 UTC | 18h 45m |
| 2026-04-30 | CSH865 | PVG → KUL | Apr 30, 23:15 UTC | May 1, 11:10 UTC | 11h 55m |
| 2026-04-30 | CSH863 | PVG → KUL | Apr 30, 17:05 UTC | Apr 30, 21:40 UTC | 4h 35m |
| 2026-04-29 | CSH862 | KUL → PVG | Apr 29, 18:10 UTC | Apr 29, 18:25 UTC | 15m |
| 2026-04-29 | CSH854 | BKK → PVG | Apr 29, 05:09 UTC | Apr 29, 16:40 UTC | 11h 31m |
| 2026-04-28 | CSH812 | HKG → PVG | Apr 28, 06:15 UTC | Apr 28, 15:15 UTC | 9h 0m |
| 2026-04-27 | CSH831 | PVG → HKT | Apr 27, 12:15 UTC | Apr 28, 04:15 UTC | 16h 0m |
| 2026-04-26 | CSH9068 | CGQ → PVG | Apr 26, 13:10 UTC | Apr 27, 12:15 UTC | 23h 5m |
| 2026-04-26 | CSH842 | BKK → PVG | Apr 26, 03:00 UTC | Apr 26, 13:45 UTC | 10h 45m |
| 2026-04-25 | CSH853 | PVG → BKK | Apr 25, 06:30 UTC | Apr 25, 14:45 UTC | 8h 15m |
| 2026-04-25 | CSH811 | PVG → HKG | Apr 25, 04:00 UTC | Apr 25, 04:25 UTC | 25m |
| 2026-04-24 | CSH862 | KUL → PVG | Apr 24, 18:50 UTC | Apr 25, 03:15 UTC | 8h 25m |
| 2026-04-24 | CSH861 | PVG → KUL | Apr 24, 05:10 UTC | Apr 24, 16:40 UTC | 11h 30m |
| 2026-04-23 | CSH853 | PVG → BKK | Apr 23, 14:15 UTC | Apr 23, 15:20 UTC | 1h 5m |
| 2026-04-22 | CSH856 | BKK → PVG | Apr 22, 14:20 UTC | Apr 23, 14:15 UTC | 23h 55m |
| 2026-04-22 | CSH856 | BKK → PVG | Apr 22, 13:35 UTC | Apr 22, 15:50 UTC | 2h 15m |
| 2026-04-21 | CSH832 | HKT → PVG | Apr 21, 14:20 UTC | Apr 22, 12:15 UTC | 21h 55m |
| 2026-04-21 | CSH832 | HKT → PVG | Apr 21, 12:20 UTC | Apr 22, 12:15 UTC | 23h 55m |
| 2026-04-21 | CSH831 | PVG → HKT | Apr 21, 12:01 UTC | Apr 21, 20:25 UTC | 8h 25m |
| 2026-04-20 | CSH842 | BKK → PVG | Apr 20, 03:15 UTC | Apr 20, 06:25 UTC | 3h 10m |
| 2026-04-19 | CSH853 | PVG → BKK | Apr 19, 06:20 UTC | Apr 19, 14:40 UTC | 8h 20m |
| 2026-04-19 | CSH811 | PVG → HKG | Apr 19, 04:25 UTC | Apr 19, 04:40 UTC | 15m |
| 2026-04-18 | CSH862 | KUL → PVG | Apr 18, 18:45 UTC | Apr 19, 03:55 UTC | 9h 10m |
| 2026-04-18 | CSH861 | - | Apr 18, 07:25 UTC | Apr 18, 16:10 UTC | 8h 45m |
| 2026-04-18 | CSH854 | BKK → PVG | Apr 18, 05:25 UTC | Apr 18, 05:40 UTC | 15m |
| 2026-04-17 | CSH853 | PVG → BKK | Apr 17, 12:55 UTC | Apr 17, 13:15 UTC | 20m |
| 2026-04-17 | CSH812 | HKG → PVG | Apr 17, 06:30 UTC | Apr 17, 06:55 UTC | 25m |
| 2026-04-17 | CSH811 | PVG → HKG | Apr 17, 04:20 UTC | Apr 17, 04:45 UTC | 26m |
| 2026-04-17 | CSH811 | PVG → HKG | Apr 17, 03:25 UTC | Apr 17, 03:40 UTC | 15m |
| 2026-04-16 | CSH832 | - | Apr 16, 19:50 UTC | Apr 16, 20:05 UTC | 15m |
| 2026-04-16 | CSH832 | - | Apr 16, 17:35 UTC | Apr 16, 18:15 UTC | 40m |
| 2026-04-16 | CSH831 | PVG → HKT | Apr 16, 15:15 UTC | Apr 16, 15:35 UTC | 20m |
| 2026-04-16 | CSH831 | PVG → HKT | Apr 16, 15:00 UTC | Apr 16, 15:10 UTC | 10m |
| 2026-04-16 | CSH9255 | PVG → HAK | Apr 16, 03:39 UTC | Apr 16, 03:55 UTC | 15m |
| 2026-04-16 | CSH9255 | PVG → HAK | Apr 16, 02:30 UTC | Apr 16, 03:04 UTC | 35m |
| 2026-04-14 | CSH840 | - | Apr 14, 17:10 UTC | Apr 14, 17:25 UTC | 15m |
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-1261 page for operator, model, and routing details .