sensors Mode-S transponder
7809AC
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-6971 · AIRBUS A-320
- Hex
- 7809AC
- Octal
- 36004654
- Decimal
- 7,866,796
- Country
- CN
- Tail
- B-6971
- Type
- A320
- Flights observed
- 36
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 12h ago
Last known position
Country allocation
The ICAO 24-bit address 7809AC 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 |
|---|---|---|---|
| CQH6539 | Spring Airlines | 4 | 2026-04-29 |
| CQH6540 | Spring Airlines | 3 | 2026-04-29 |
| CQH8613 | Spring Airlines | 2 | 2026-04-28 |
| CQH8609 | Spring Airlines | 2 | 2026-05-03 |
| CQH6873 | Spring Airlines | 2 | 2026-05-06 |
| CQH8870 | Spring Airlines | 1 | 2026-04-24 |
| CQH8805 | - | 1 | 2026-04-24 |
| CQH8790 | Spring Airlines | 1 | 2026-05-23 |
| CQH8789 | Spring Airlines | 1 | 2026-05-23 |
| CQH8753 | Spring Airlines | 1 | 2026-04-30 |
| CQH8614 | Spring Airlines | 1 | 2026-04-29 |
| CQH8610 | Spring Airlines | 1 | 2026-05-03 |
| CQH8545 | Spring Airlines | 1 | 2026-05-29 |
| CQH7609 | - | 1 | 2026-04-17 |
| CQH7558 | Spring Airlines | 1 | 2026-05-05 |
| CQH7557 | Spring Airlines | 1 | 2026-05-04 |
| CQH7556 | Spring Airlines | 1 | 2026-05-16 |
| CQH7520 | Spring Airlines | 1 | 2026-05-17 |
| CQH7519 | Spring Airlines | 1 | 2026-05-16 |
| CQH7206 | - | 1 | 2026-04-13 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CQH8545 | CGQ → NGB | May 29, 12:05 UTC | May 30, 04:10 UTC | 16h 5m |
| 2026-05-28 | CQH7135 | LHW → TSN | May 28, 00:45 UTC | May 28, 01:05 UTC | 20m |
| 2026-05-26 | CQH6466 | BKK → NNG | May 26, 08:34 UTC | May 26, 09:29 UTC | 55m |
| 2026-05-26 | CQH6465 | NNG → BKK | May 26, 05:54 UTC | May 26, 06:59 UTC | 1h 5m |
| 2026-05-23 | CQH8790 | ICN → SJW | May 23, 10:55 UTC | May 23, 11:15 UTC | 20m |
| 2026-05-23 | CQH8789 | SJW → ICN | May 23, 09:05 UTC | May 23, 09:35 UTC | 30m |
| 2026-05-17 | CQH7520 | SZX → SHA | May 17, 06:05 UTC | May 17, 07:15 UTC | 1h 10m |
| 2026-05-16 | CQH7519 | SHA → SZX | May 16, 23:45 UTC | May 17, 03:50 UTC | 4h 5m |
| 2026-05-16 | CQH7556 | SZX → SHA | May 16, 22:25 UTC | May 16, 22:35 UTC | 10m |
| 2026-05-16 | CQH6874 | NGB → SZX | May 16, 15:25 UTC | May 16, 15:35 UTC | 10m |
| 2026-05-06 | CQH6873 | SZX → NGB | May 6, 10:35 UTC | May 6, 10:45 UTC | 10m |
| 2026-05-05 | CQH7558 | SGN → PVG | May 5, 08:35 UTC | May 5, 14:55 UTC | 6h 20m |
| 2026-05-04 | CQH7557 | PVG → SGN | May 4, 13:40 UTC | May 5, 08:55 UTC | 19h 16m |
| 2026-05-03 | CQH8610 | BKK → KHN | May 3, 12:35 UTC | May 3, 13:00 UTC | 25m |
| 2026-05-03 | CQH8609 | KHN → BKK | May 3, 10:45 UTC | May 3, 11:20 UTC | 35m |
| 2026-05-02 | CQH8609 | KHN → BKK | May 2, 12:50 UTC | May 3, 11:00 UTC | 22h 9m |
| 2026-05-01 | CQH6873 | SZX → NGB | May 1, 06:45 UTC | May 1, 06:55 UTC | 10m |
| 2026-04-30 | CQH8753 | SZX → XIY | Apr 30, 22:35 UTC | Apr 30, 22:45 UTC | 10m |
| 2026-04-30 | CQH6596 | TNA → SZX | Apr 30, 15:30 UTC | Apr 30, 15:45 UTC | 15m |
| 2026-04-29 | CQH6540 | SJW → SZX | Apr 29, 19:00 UTC | Apr 29, 19:25 UTC | 25m |
| 2026-04-29 | CQH6540 | SJW → SZX | Apr 29, 13:10 UTC | Apr 29, 13:30 UTC | 20m |
| 2026-04-29 | CQH6539 | SZX → SJW | Apr 29, 10:20 UTC | Apr 29, 10:35 UTC | 15m |
| 2026-04-29 | CQH6539 | SZX → SJW | Apr 29, 06:10 UTC | Apr 29, 06:25 UTC | 15m |
| 2026-04-29 | CQH8614 | CKG → SZX | Apr 29, 03:34 UTC | Apr 29, 03:45 UTC | 10m |
| 2026-04-28 | CQH8613 | SZX → CKG | Apr 28, 22:55 UTC | Apr 28, 23:10 UTC | 15m |
| 2026-04-28 | CQH6540 | SJW → SZX | Apr 28, 16:45 UTC | Apr 28, 17:20 UTC | 35m |
| 2026-04-28 | CQH6539 | SZX → SJW | Apr 28, 09:10 UTC | Apr 28, 12:20 UTC | 3h 10m |
| 2026-04-28 | CQH6539 | SZX → SJW | Apr 28, 05:00 UTC | Apr 28, 05:15 UTC | 15m |
| 2026-04-27 | CQH8613 | SZX → CKG | Apr 27, 22:45 UTC | Apr 27, 22:55 UTC | 10m |
| 2026-04-27 | CQH6728 | NNY → SZX | Apr 27, 17:45 UTC | Apr 27, 18:00 UTC | 15m |
| 2026-04-26 | CQH7091 | SJW → ZQZ | Apr 26, 09:55 UTC | Apr 26, 10:10 UTC | 15m |
| 2026-04-24 | CQH8805 | - | Apr 24, 23:40 UTC | Apr 24, 23:55 UTC | 15m |
| 2026-04-24 | CQH8870 | HRB → PVG | Apr 24, 15:20 UTC | Apr 24, 15:55 UTC | 35m |
| 2026-04-17 | CQH7609 | - | Apr 17, 23:10 UTC | Apr 17, 23:20 UTC | 10m |
| 2026-04-13 | CQH7206 | - | Apr 13, 13:35 UTC | Apr 13, 14:20 UTC | 45m |
| 2026-04-13 | CQH7205 | PKX → CJU | Apr 13, 10:55 UTC | Apr 13, 11:15 UTC | 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-6971 page for operator, model, and routing details .