sensors Mode-S transponder
781645
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-307G · AIRBUS A-320neo
- Hex
- 781645
- Octal
- 36013105
- Decimal
- 7,870,021
- Country
- CN
- Tail
- B-307G
- Type
- A20N
- Flights observed
- 28
- Distinct callsigns
- 13
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 781645 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CDC8656 | - | 6 | 2026-06-04 |
| CDC8655 | - | 6 | 2026-06-04 |
| CDC8597 | - | 2 | 2026-05-15 |
| CDC8592 | Zhejiang Loong Airlines | 2 | 2026-05-09 |
| CDC8591 | Zhejiang Loong Airlines | 2 | 2026-05-09 |
| CDC8262 | - | 2 | 2026-05-10 |
| CDC8021 | Zhejiang Loong Airlines | 2 | 2026-04-21 |
| CDC8998 | Zhejiang Loong Airlines | 1 | 2026-05-14 |
| CDC8997 | Zhejiang Loong Airlines | 1 | 2026-05-14 |
| CDC8598 | - | 1 | 2026-05-16 |
| CDC8078 | Zhejiang Loong Airlines | 1 | 2026-04-20 |
| CDC8077 | Zhejiang Loong Airlines | 1 | 2026-04-20 |
| CDC8022 | Zhejiang Loong Airlines | 1 | 2026-04-21 |
Recent flights last 28
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-04 | CDC8656 | - | Jun 4, 06:30 UTC | Jun 4, 06:40 UTC | 10m |
| 2026-06-04 | CDC8655 | - | Jun 4, 04:15 UTC | Jun 4, 04:35 UTC | 20m |
| 2026-06-01 | CDC8656 | - | Jun 1, 08:00 UTC | Jun 1, 08:10 UTC | 10m |
| 2026-06-01 | CDC8655 | - | Jun 1, 01:55 UTC | Jun 1, 06:25 UTC | 4h 30m |
| 2026-05-30 | CDC8656 | - | May 30, 10:55 UTC | May 30, 11:10 UTC | 15m |
| 2026-05-30 | CDC8656 | - | May 30, 07:05 UTC | May 30, 07:15 UTC | 10m |
| 2026-05-30 | CDC8655 | - | May 30, 00:10 UTC | May 30, 04:40 UTC | 4h 30m |
| 2026-05-24 | CDC8656 | - | May 24, 08:05 UTC | May 24, 08:15 UTC | 10m |
| 2026-05-24 | CDC8655 | - | May 24, 06:20 UTC | May 24, 06:40 UTC | 20m |
| 2026-05-23 | CDC8655 | - | May 23, 10:00 UTC | May 24, 02:00 UTC | 16h 0m |
| 2026-05-23 | CDC8656 | - | May 23, 06:10 UTC | May 24, 02:00 UTC | 19h 51m |
| 2026-05-22 | CDC8655 | - | May 22, 23:40 UTC | May 23, 04:05 UTC | 4h 24m |
| 2026-05-16 | CDC8598 | - | May 16, 03:10 UTC | May 16, 12:55 UTC | 9h 46m |
| 2026-05-15 | CDC8597 | - | May 15, 11:10 UTC | May 16, 03:15 UTC | 16h 4m |
| 2026-05-15 | CDC8597 | - | May 15, 01:00 UTC | May 15, 11:25 UTC | 10h 25m |
| 2026-05-14 | CDC8998 | SIN → DYG | May 14, 07:55 UTC | May 15, 01:05 UTC | 17h 10m |
| 2026-05-14 | CDC8997 | DYG → SIN | May 14, 05:55 UTC | May 14, 06:10 UTC | 15m |
| 2026-05-10 | CDC8262 | - | May 10, 06:40 UTC | May 10, 06:59 UTC | 20m |
| 2026-05-09 | CDC8592 | CJJ → DYG | May 9, 07:00 UTC | May 9, 07:40 UTC | 40m |
| 2026-05-09 | CDC8591 | DYG → CJJ | May 9, 05:10 UTC | May 9, 05:45 UTC | 35m |
| 2026-05-07 | CDC8262 | - | May 7, 06:35 UTC | May 7, 07:00 UTC | 25m |
| 2026-05-06 | CDC8592 | CJJ → DYG | May 6, 09:30 UTC | May 6, 10:05 UTC | 35m |
| 2026-05-06 | CDC8591 | DYG → CJJ | May 6, 07:45 UTC | May 6, 08:15 UTC | 30m |
| 2026-04-21 | CDC8022 | BKK → HGH | Apr 21, 10:30 UTC | Apr 21, 12:50 UTC | 2h 20m |
| 2026-04-21 | CDC8021 | HGH → BKK | Apr 21, 06:50 UTC | Apr 21, 09:15 UTC | 2h 25m |
| 2026-04-20 | CDC8021 | HGH → BKK | Apr 20, 09:20 UTC | Apr 21, 09:15 UTC | 23h 55m |
| 2026-04-20 | CDC8078 | KIX → HGH | Apr 20, 09:10 UTC | Apr 21, 07:05 UTC | 21h 55m |
| 2026-04-20 | CDC8077 | HGH → KIX | Apr 20, 06:20 UTC | Apr 20, 07:05 UTC | 45m |
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-307G page for operator, model, and routing details .