sensors Mode-S transponder
781509
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-205Y · BOEING 737-800
- Hex
- 781509
- Octal
- 36012411
- Decimal
- 7,869,705
- Country
- CN
- Tail
- B-205Y
- Type
- B738
- Flights observed
- 47
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 781509 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 |
|---|---|---|---|
| CSH805 | - | 6 | 2026-06-13 |
| CSH827 | Shanghai Airlines | 5 | 2026-06-10 |
| CSH809 | - | 4 | 2026-06-18 |
| CSH855 | Shanghai Airlines | 3 | 2026-05-29 |
| CSH828 | Shanghai Airlines | 3 | 2026-05-23 |
| CSH810 | - | 3 | 2026-06-18 |
| CSH9333 | Shanghai Airlines | 2 | 2026-05-10 |
| CSH9253 | - | 2 | 2026-06-17 |
| CSH856 | Shanghai Airlines | 2 | 2026-05-29 |
| CSH854 | Shanghai Airlines | 2 | 2026-05-28 |
| CSH806 | Shanghai Airlines | 2 | 2026-06-13 |
| CSH9549 | - | 1 | 2026-04-26 |
| CSH9539 | Shanghai Airlines | 1 | 2026-06-02 |
| CSH9334 | Shanghai Airlines | 1 | 2026-05-10 |
| CSH9255 | Shanghai Airlines | 1 | 2026-04-29 |
| CSH9254 | Shanghai Airlines | 1 | 2026-05-13 |
| CSH853 | Shanghai Airlines | 1 | 2026-05-27 |
| CSH852 | - | 1 | 2026-06-16 |
| CSH841 | Shanghai Airlines | 1 | 2026-05-26 |
| CSH831 | Shanghai Airlines | 1 | 2026-06-11 |
Recent flights last 47
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-18 | CSH810 | - | Jun 18, 13:30 UTC | Jun 18, 14:25 UTC | 55m |
| 2026-06-18 | CSH809 | - | Jun 18, 10:40 UTC | Jun 18, 11:40 UTC | 1h 0m |
| 2026-06-17 | CSH9253 | - | Jun 17, 11:05 UTC | Jun 17, 14:00 UTC | 2h 55m |
| 2026-06-16 | CSH809 | - | Jun 16, 09:40 UTC | Jun 16, 10:30 UTC | 50m |
| 2026-06-16 | CSH852 | - | Jun 16, 03:25 UTC | Jun 16, 04:00 UTC | 35m |
| 2026-06-15 | CSH810 | HKG → SHA | Jun 15, 11:39 UTC | Jun 16, 01:50 UTC | 14h 10m |
| 2026-06-15 | CSH809 | - | Jun 15, 09:10 UTC | Jun 15, 09:25 UTC | 15m |
| 2026-06-13 | CSH806 | MFM → PVG | Jun 13, 06:25 UTC | Jun 13, 07:20 UTC | 55m |
| 2026-06-13 | CSH805 | - | Jun 13, 03:35 UTC | Jun 13, 05:05 UTC | 1h 29m |
| 2026-06-12 | CSH805 | - | Jun 12, 08:50 UTC | Jun 13, 05:05 UTC | 20h 14m |
| 2026-06-12 | CSH829 | - | Jun 12, 06:40 UTC | Jun 12, 07:05 UTC | 25m |
| 2026-06-11 | CSH831 | PVG → HKT | Jun 11, 05:50 UTC | Jun 11, 20:20 UTC | 14h 30m |
| 2026-06-11 | CSH805 | PVG → MFM | Jun 11, 03:00 UTC | Jun 11, 04:20 UTC | 1h 20m |
| 2026-06-10 | CSH805 | PVG → MFM | Jun 10, 09:40 UTC | Jun 11, 04:20 UTC | 18h 40m |
| 2026-06-10 | CSH827 | PVG → ICN | Jun 10, 07:50 UTC | Jun 10, 08:25 UTC | 35m |
| 2026-06-09 | CSH806 | MFM → PVG | Jun 9, 05:40 UTC | Jun 9, 06:45 UTC | 1h 5m |
| 2026-06-09 | CSH805 | PVG → MFM | Jun 9, 04:00 UTC | Jun 9, 04:15 UTC | 15m |
| 2026-06-09 | CSH805 | PVG → MFM | Jun 9, 02:50 UTC | Jun 9, 03:25 UTC | 35m |
| 2026-06-02 | CSH9539 | PVG → SYX | Jun 2, 03:00 UTC | Jun 2, 07:55 UTC | 4h 55m |
| 2026-05-29 | CSH856 | BKK → PVG | May 29, 12:35 UTC | May 29, 14:10 UTC | 1h 35m |
| 2026-05-29 | CSH855 | PVG → BKK | May 29, 02:40 UTC | May 29, 10:40 UTC | 8h 0m |
| 2026-05-28 | CSH854 | BKK → PVG | May 28, 06:30 UTC | May 29, 02:40 UTC | 20h 10m |
| 2026-05-28 | CSH854 | BKK → PVG | May 28, 05:05 UTC | May 29, 02:40 UTC | 21h 35m |
| 2026-05-27 | CSH853 | PVG → BKK | May 27, 04:59 UTC | May 27, 14:35 UTC | 9h 36m |
| 2026-05-26 | CSH841 | CGQ → PVG | May 26, 15:54 UTC | May 26, 18:14 UTC | 2h 20m |
| 2026-05-24 | CSH856 | BKK → PVG | May 24, 12:50 UTC | May 25, 03:25 UTC | 14h 35m |
| 2026-05-24 | CSH855 | PVG → BKK | May 24, 08:55 UTC | May 24, 11:20 UTC | 2h 25m |
| 2026-05-23 | CSH855 | PVG → BKK | May 23, 10:20 UTC | May 24, 09:15 UTC | 22h 55m |
| 2026-05-23 | CSH828 | ICN → PVG | May 23, 09:55 UTC | May 23, 10:20 UTC | 25m |
| 2026-05-23 | CSH827 | PVG → ICN | May 23, 08:00 UTC | May 23, 08:35 UTC | 35m |
| 2026-05-21 | CSH828 | ICN → PVG | May 21, 09:40 UTC | May 21, 10:20 UTC | 40m |
| 2026-05-21 | CSH827 | PVG → ICN | May 21, 07:55 UTC | May 21, 08:30 UTC | 35m |
| 2026-05-20 | CSH827 | PVG → ICN | May 20, 09:05 UTC | May 21, 08:15 UTC | 23h 10m |
| 2026-05-16 | CSH828 | ICN → PVG | May 16, 09:45 UTC | May 17, 03:00 UTC | 17h 15m |
| 2026-05-16 | CSH827 | PVG → ICN | May 16, 07:55 UTC | May 16, 08:36 UTC | 40m |
| 2026-05-13 | CSH9254 | HAK → SHA | May 13, 14:25 UTC | May 13, 15:25 UTC | 1h 0m |
| 2026-05-13 | CSH9253 | SHA → HAK | May 13, 10:40 UTC | May 13, 11:05 UTC | 25m |
| 2026-05-10 | CSH9334 | SZX → SHA | May 10, 10:35 UTC | May 10, 10:45 UTC | 10m |
| 2026-05-10 | CSH9333 | SHA → SZX | May 10, 06:55 UTC | May 10, 07:15 UTC | 20m |
| 2026-05-07 | CSH818 | MFM → SHA | May 7, 05:50 UTC | May 7, 06:10 UTC | 20m |
| 2026-05-07 | CSH817 | SHA → MFM | May 7, 03:35 UTC | May 7, 03:45 UTC | 10m |
| 2026-05-06 | CSH810 | HKG → SHA | May 6, 11:15 UTC | May 6, 12:20 UTC | 1h 5m |
| 2026-05-06 | CSH809 | SHA → HKG | May 6, 09:00 UTC | May 6, 09:30 UTC | 30m |
| 2026-05-04 | CSH9333 | SHA → SZX | May 4, 07:00 UTC | May 4, 07:20 UTC | 20m |
| 2026-04-29 | CSH9255 | PVG → HAK | Apr 29, 02:20 UTC | Apr 29, 07:45 UTC | 5h 25m |
| 2026-04-26 | CSH9549 | - | Apr 26, 08:00 UTC | Apr 26, 08:10 UTC | 10m |
| 2026-04-21 | CSH813 | FOC → KUL | Apr 21, 07:30 UTC | Apr 21, 08:20 UTC | 50m |
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-205Y page for operator, model, and routing details .