sensors Mode-S transponder
781957
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-30FK · AIRBUS A-320neo
- Hex
- 781957
- Octal
- 36014527
- Decimal
- 7,870,807
- Country
- CN
- Tail
- B-30FK
- Type
- A20N
- Flights observed
- 20
- Distinct callsigns
- 7
- Country
- CN
- Last broadcast
- 13d ago
Last known position
Country allocation
The ICAO 24-bit address 781957 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 7 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CDC8566 | - | 13 | 2026-04-28 |
| CDC8565 | - | 2 | 2026-04-26 |
| CDC8992 | Zhejiang Loong Airlines | 1 | 2026-05-18 |
| CDC8022 | Zhejiang Loong Airlines | 1 | 2026-05-25 |
| CDC8021 | Zhejiang Loong Airlines | 1 | 2026-05-25 |
| CDC6030 | - | 1 | 2026-05-04 |
| CDC6029 | - | 1 | 2026-05-04 |
Recent flights last 20
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-25 | CDC8022 | BKK → HGH | May 25, 10:35 UTC | May 25, 12:55 UTC | 2h 20m |
| 2026-05-25 | CDC8021 | HGH → BKK | May 25, 06:45 UTC | May 25, 09:00 UTC | 2h 15m |
| 2026-05-18 | CDC8992 | HRB → HGH | May 18, 06:50 UTC | May 18, 07:35 UTC | 45m |
| 2026-05-04 | CDC6030 | - | May 4, 07:45 UTC | May 4, 08:00 UTC | 15m |
| 2026-05-04 | CDC6029 | - | May 4, 02:10 UTC | May 4, 05:25 UTC | 3h 15m |
| 2026-04-28 | CDC8566 | - | Apr 28, 05:40 UTC | Apr 29, 01:20 UTC | 19h 40m |
| 2026-04-28 | CDC8566 | - | Apr 28, 02:05 UTC | Apr 29, 01:20 UTC | 23h 15m |
| 2026-04-26 | CDC8565 | - | Apr 26, 04:35 UTC | Apr 27, 01:20 UTC | 20h 45m |
| 2026-04-26 | CDC8566 | - | Apr 26, 01:25 UTC | Apr 26, 05:10 UTC | 3h 45m |
| 2026-04-25 | CDC8566 | - | Apr 25, 05:50 UTC | Apr 26, 05:10 UTC | 23h 20m |
| 2026-04-25 | CDC8566 | - | Apr 25, 05:40 UTC | Apr 26, 01:35 UTC | 19h 55m |
| 2026-04-25 | CDC8566 | - | Apr 25, 02:05 UTC | Apr 26, 01:35 UTC | 23h 30m |
| 2026-04-24 | CDC8566 | - | Apr 24, 04:30 UTC | Apr 25, 02:15 UTC | 21h 45m |
| 2026-04-24 | CDC8566 | - | Apr 24, 01:20 UTC | Apr 24, 05:00 UTC | 3h 40m |
| 2026-04-23 | CDC8566 | - | Apr 23, 05:45 UTC | Apr 24, 01:30 UTC | 19h 44m |
| 2026-04-23 | CDC8566 | - | Apr 23, 02:10 UTC | Apr 24, 01:30 UTC | 23h 20m |
| 2026-04-22 | CDC8566 | - | Apr 22, 07:55 UTC | Apr 23, 05:45 UTC | 21h 50m |
| 2026-04-22 | CDC8566 | - | Apr 22, 03:55 UTC | Apr 23, 02:25 UTC | 22h 30m |
| 2026-04-18 | CDC8565 | - | Apr 18, 06:05 UTC | Apr 19, 01:40 UTC | 19h 35m |
| 2026-04-18 | CDC8566 | - | Apr 18, 02:05 UTC | Apr 19, 01:40 UTC | 23h 35m |
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-30FK page for operator, model, and routing details .