sensors Mode-S transponder
7811B1
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-8590 · AIRBUS A-320
- Hex
- 7811B1
- Octal
- 36010661
- Decimal
- 7,868,849
- Country
- CN
- Tail
- B-8590
- Type
- A320
- Flights observed
- 55
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 51m ago
Last known position
Country allocation
The ICAO 24-bit address 7811B1 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 |
|---|---|---|---|
| CQH6466 | Spring Airlines | 4 | 2026-05-24 |
| CQH6465 | Spring Airlines | 4 | 2026-05-24 |
| CQH7518 | Spring Airlines | 3 | 2026-05-30 |
| CQH7281 | Spring Airlines | 3 | 2026-04-28 |
| CQH7206 | Spring Airlines | 3 | 2026-05-30 |
| CQH7205 | Spring Airlines | 3 | 2026-05-28 |
| CQH7282 | Spring Airlines | 2 | 2026-04-28 |
| CQH6786 | Spring Airlines | 2 | 2026-05-03 |
| CQH6785 | Spring Airlines | 2 | 2026-05-03 |
| CQH6727 | Spring Airlines | 2 | 2026-05-02 |
| CQH6566 | Spring Airlines | 2 | 2026-04-16 |
| CQH6565 | Spring Airlines | 2 | 2026-04-16 |
| CQH6540 | Spring Airlines | 2 | 2026-04-24 |
| CQH6539 | Spring Airlines | 2 | 2026-04-24 |
| CQH8936 | Spring Airlines | 1 | 2026-05-01 |
| CQH8892 | Spring Airlines | 1 | 2026-04-21 |
| CQH8891 | Spring Airlines | 1 | 2026-04-20 |
| CQH8755 | Spring Airlines | 1 | 2026-04-26 |
| CQH8753 | Spring Airlines | 1 | 2026-05-03 |
| CQH8672 | Spring Airlines | 1 | 2026-05-02 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | CQH7206 | CJU → PKX | May 30, 11:00 UTC | May 30, 14:10 UTC | 3h 10m |
| 2026-05-30 | CQH7518 | LHW → PKX | May 30, 07:10 UTC | May 30, 07:25 UTC | 15m |
| 2026-05-28 | CQH7205 | PKX → CJU | May 28, 10:50 UTC | May 28, 14:10 UTC | 3h 20m |
| 2026-05-28 | CQH7518 | LHW → PKX | May 28, 07:15 UTC | May 28, 07:30 UTC | 15m |
| 2026-05-26 | CQH7206 | CJU → PKX | May 26, 13:45 UTC | May 26, 14:05 UTC | 20m |
| 2026-05-26 | CQH7205 | PKX → CJU | May 26, 10:54 UTC | May 26, 11:09 UTC | 15m |
| 2026-05-26 | CQH7518 | LHW → PKX | May 26, 07:10 UTC | May 26, 07:24 UTC | 15m |
| 2026-05-24 | CQH6466 | BKK → NNG | May 24, 08:35 UTC | May 24, 09:35 UTC | 1h 0m |
| 2026-05-24 | CQH6465 | NNG → BKK | May 24, 05:45 UTC | May 24, 06:45 UTC | 1h 0m |
| 2026-05-22 | CQH6466 | BKK → NNG | May 22, 08:25 UTC | May 22, 09:25 UTC | 59m |
| 2026-05-22 | CQH6465 | NNG → BKK | May 22, 05:55 UTC | May 22, 06:55 UTC | 1h 0m |
| 2026-05-21 | CQH6156 | ZUH → SJW | May 21, 06:55 UTC | May 21, 07:05 UTC | 10m |
| 2026-05-21 | CQH6155 | SJW → ZUH | May 21, 03:50 UTC | May 21, 04:05 UTC | 15m |
| 2026-05-20 | CQH6466 | BKK → NNG | May 20, 09:20 UTC | May 20, 09:40 UTC | 20m |
| 2026-05-20 | CQH6465 | NNG → BKK | May 20, 07:00 UTC | May 20, 07:30 UTC | 30m |
| 2026-05-17 | CQH7432 | DMK → NGB | May 17, 07:20 UTC | May 17, 10:25 UTC | 3h 5m |
| 2026-05-17 | CQH7431 | NGB → BKK | May 17, 03:05 UTC | May 17, 05:30 UTC | 2h 25m |
| 2026-05-09 | CQH7596 | ZUH → YTY | May 9, 06:30 UTC | May 9, 06:40 UTC | 10m |
| 2026-05-08 | CQH7502 | BKK → TFU | May 8, 04:19 UTC | May 8, 13:05 UTC | 8h 45m |
| 2026-05-08 | CQH7501 | TFU → BKK | May 8, 01:59 UTC | May 8, 02:59 UTC | 1h 0m |
| 2026-05-05 | CQH6466 | BKK → NNG | May 5, 08:25 UTC | May 5, 08:50 UTC | 25m |
| 2026-05-05 | CQH6465 | NNG → BKK | May 5, 06:30 UTC | May 5, 06:55 UTC | 25m |
| 2026-05-04 | CQH6954 | SHE → SJW | May 4, 14:05 UTC | May 4, 14:20 UTC | 15m |
| 2026-05-03 | CQH8753 | SZX → XIY | May 3, 22:45 UTC | May 3, 23:00 UTC | 15m |
| 2026-05-03 | CQH6786 | WUH → SZX | May 3, 16:50 UTC | May 3, 17:10 UTC | 20m |
| 2026-05-03 | CQH6785 | WUH → WUA | May 3, 02:05 UTC | May 3, 02:20 UTC | 15m |
| 2026-05-02 | CQH6727 | SZX → NNY | May 2, 10:30 UTC | May 2, 10:45 UTC | 15m |
| 2026-05-02 | CQH8672 | HIA → SZX | May 2, 08:30 UTC | May 2, 08:50 UTC | 20m |
| 2026-05-01 | CQH8936 | CGQ → PVG | May 1, 15:00 UTC | May 1, 15:35 UTC | 35m |
| 2026-04-30 | CQH8560 | ICN → PVG | Apr 30, 08:15 UTC | Apr 30, 08:40 UTC | 25m |
| 2026-04-30 | CQH8559 | PVG → ICN | Apr 30, 05:45 UTC | Apr 30, 06:15 UTC | 30m |
| 2026-04-28 | CQH7282 | BKK → PVG | Apr 28, 12:35 UTC | Apr 28, 14:45 UTC | 2h 10m |
| 2026-04-28 | CQH7281 | PVG → BKK | Apr 28, 08:00 UTC | Apr 28, 10:25 UTC | 2h 25m |
| 2026-04-27 | CQH7281 | PVG → BKK | Apr 27, 12:20 UTC | Apr 28, 10:25 UTC | 22h 5m |
| 2026-04-27 | CQH7282 | BKK → PVG | Apr 27, 11:50 UTC | Apr 28, 10:15 UTC | 22h 25m |
| 2026-04-26 | CQH7281 | PVG → BKK | Apr 26, 19:50 UTC | Apr 27, 10:15 UTC | 14h 25m |
| 2026-04-26 | CQH8755 | PVG → BKK | Apr 26, 10:55 UTC | Apr 26, 18:05 UTC | 7h 10m |
| 2026-04-26 | CQH6610 | FUK → PVG | Apr 26, 03:35 UTC | Apr 26, 03:45 UTC | 10m |
| 2026-04-24 | CQH8671 | HIA → HRB | Apr 24, 22:30 UTC | Apr 25, 07:10 UTC | 8h 40m |
| 2026-04-24 | CQH6540 | SJW → SZX | Apr 24, 19:35 UTC | Apr 24, 19:45 UTC | 10m |
| 2026-04-24 | CQH6540 | SJW → SZX | Apr 24, 14:30 UTC | Apr 24, 14:40 UTC | 10m |
| 2026-04-24 | CQH6539 | SZX → SJW | Apr 24, 11:35 UTC | Apr 24, 11:55 UTC | 20m |
| 2026-04-24 | CQH6539 | SZX → SJW | Apr 24, 07:40 UTC | Apr 24, 07:50 UTC | 10m |
| 2026-04-23 | CQH6786 | WUH → SZX | Apr 23, 20:00 UTC | Apr 23, 20:15 UTC | 15m |
| 2026-04-23 | CQH6785 | WUH → WUA | Apr 23, 02:20 UTC | Apr 23, 02:35 UTC | 15m |
| 2026-04-22 | CQH6728 | NNY → SZX | Apr 22, 18:05 UTC | Apr 22, 18:25 UTC | 20m |
| 2026-04-22 | CQH6727 | SZX → NNY | Apr 22, 13:20 UTC | Apr 22, 13:35 UTC | 15m |
| 2026-04-21 | CQH8892 | BKK → PVG | Apr 21, 07:00 UTC | Apr 21, 09:20 UTC | 2h 20m |
| 2026-04-20 | CQH8891 | PVG → BKK | Apr 20, 13:30 UTC | Apr 21, 05:40 UTC | 16h 10m |
| 2026-04-17 | CQH7206 | CJU → PKX | Apr 17, 13:55 UTC | Apr 17, 14:20 UTC | 25m |
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-8590 page for operator, model, and routing details .