sensors Mode-S transponder
781C52
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-325V · AIRBUS A-320neo
- Hex
- 781C52
- Octal
- 36016122
- Decimal
- 7,871,570
- Country
- CN
- Tail
- B-325V
- Type
- A20N
- Flights observed
- 32
- Distinct callsigns
- 18
- Country
- CN
- Last broadcast
- 9d ago
Last known position
Country allocation
The ICAO 24-bit address 781C52 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 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CES509 | - | 5 | 2026-07-13 |
| CES827 | China Eastern Airlines | 4 | 2026-07-26 |
| CES9886 | - | 3 | 2026-06-28 |
| CES898 | - | 3 | 2026-07-20 |
| CES897 | China Eastern Airlines | 2 | 2026-07-20 |
| CES828 | China Eastern Airlines | 2 | 2026-07-26 |
| CES510 | - | 2 | 2026-07-13 |
| CES870 | China Eastern Airlines | 1 | 2026-07-21 |
| CES7426 | - | 1 | 2026-07-15 |
| CES7425 | - | 1 | 2026-07-15 |
| CES726 | China Eastern Airlines | 1 | 2026-05-04 |
| CES725 | China Eastern Airlines | 1 | 2026-05-04 |
| CES6292 | - | 1 | 2026-07-15 |
| CES6179 | China Eastern Airlines | 1 | 2026-05-12 |
| CES550 | - | 1 | 2026-07-01 |
| CES549 | - | 1 | 2026-07-01 |
| CES5036 | China Eastern Airlines | 1 | 2026-06-03 |
| CES5035 | China Eastern Airlines | 1 | 2026-06-03 |
Recent flights last 32
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CES828 | RMQ → TFU | Jul 26, 10:05 UTC | Jul 26, 10:45 UTC | 40m |
| 2026-07-26 | CES827 | TFU → RMQ | Jul 26, 08:05 UTC | Jul 26, 08:50 UTC | 45m |
| 2026-07-25 | CES827 | TFU → RMQ | Jul 25, 10:00 UTC | Jul 26, 08:30 UTC | 22h 31m |
| 2026-07-21 | CES870 | SGN → HGH | Jul 21, 16:40 UTC | Jul 21, 23:20 UTC | 6h 40m |
| 2026-07-20 | CES898 | - | Jul 20, 22:35 UTC | Jul 21, 22:30 UTC | 23h 54m |
| 2026-07-20 | CES898 | - | Jul 20, 19:20 UTC | Jul 21, 17:05 UTC | 21h 44m |
| 2026-07-20 | CES897 | HGH → SIN | Jul 20, 14:00 UTC | Jul 20, 17:35 UTC | 3h 35m |
| 2026-07-19 | CES898 | - | Jul 19, 08:25 UTC | Jul 19, 12:10 UTC | 3h 45m |
| 2026-07-19 | CES897 | HGH → SIN | Jul 19, 02:15 UTC | Jul 19, 05:45 UTC | 3h 30m |
| 2026-07-15 | CES7426 | - | Jul 15, 20:50 UTC | Jul 15, 23:05 UTC | 2h 15m |
| 2026-07-15 | CES7425 | - | Jul 15, 18:50 UTC | Jul 15, 19:00 UTC | 10m |
| 2026-07-15 | CES6292 | - | Jul 15, 12:05 UTC | Jul 15, 17:10 UTC | 5h 5m |
| 2026-07-13 | CES510 | - | Jul 13, 09:30 UTC | Jul 13, 19:10 UTC | 9h 40m |
| 2026-07-13 | CES509 | - | Jul 13, 06:10 UTC | Jul 13, 07:25 UTC | 1h 15m |
| 2026-07-12 | CES509 | - | Jul 12, 10:35 UTC | Jul 13, 07:25 UTC | 20h 50m |
| 2026-07-12 | CES509 | RMQ → HKG | Jul 12, 10:10 UTC | Jul 13, 07:25 UTC | 21h 15m |
| 2026-07-12 | CES827 | - | Jul 12, 07:35 UTC | Jul 12, 08:55 UTC | 1h 20m |
| 2026-07-08 | CES828 | - | Jul 8, 10:25 UTC | Jul 8, 11:25 UTC | 1h 0m |
| 2026-07-08 | CES827 | - | Jul 8, 07:50 UTC | Jul 8, 09:00 UTC | 1h 10m |
| 2026-07-01 | CES550 | - | Jul 1, 03:15 UTC | Jul 1, 03:40 UTC | 25m |
| 2026-07-01 | CES549 | - | Jul 1, 01:05 UTC | Jul 1, 01:25 UTC | 20m |
| 2026-06-28 | CES9886 | - | Jun 28, 03:59 UTC | Jun 28, 04:10 UTC | 10m |
| 2026-06-03 | CES5036 | BKK → TFU | Jun 3, 12:30 UTC | Jun 3, 13:25 UTC | 55m |
| 2026-06-03 | CES5035 | TFU → BKK | Jun 3, 10:00 UTC | Jun 3, 11:05 UTC | 1h 5m |
| 2026-06-03 | CES9886 | ZUH → TFU | Jun 3, 04:00 UTC | Jun 3, 04:15 UTC | 15m |
| 2026-05-17 | CES9886 | ZUH → TFU | May 17, 03:45 UTC | May 17, 03:55 UTC | 10m |
| 2026-05-12 | CES6179 | CTU → HGH | May 12, 23:55 UTC | May 13, 00:05 UTC | 10m |
| 2026-05-04 | CES726 | HKG → PVG | May 4, 23:45 UTC | May 5, 08:50 UTC | 9h 5m |
| 2026-05-04 | CES725 | PVG → HKG | May 4, 09:15 UTC | May 4, 15:50 UTC | 6h 35m |
| 2026-05-04 | CES509 | PVG → HKG | May 4, 05:55 UTC | May 4, 07:35 UTC | 1h 40m |
| 2026-04-28 | CES510 | HKG → PVG | Apr 28, 09:30 UTC | Apr 28, 10:40 UTC | 1h 10m |
| 2026-04-28 | CES509 | PVG → HKG | Apr 28, 06:15 UTC | Apr 28, 07:35 UTC | 1h 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-325V page for operator, model, and routing details .