sensors Mode-S transponder
781BB5
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-324F · AIRBUS A-320neo
- Hex
- 781BB5
- Octal
- 36015665
- Decimal
- 7,871,413
- Country
- CN
- Tail
- B-324F
- Type
- A20N
- Flights observed
- 108
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- Jul 26, 13:30 UTC
Last known position
Country allocation
The ICAO 24-bit address 781BB5 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 |
|---|---|---|---|
| CQH7259 | Spring Airlines | 4 | 2026-05-29 |
| CQH6922 | Spring Airlines | 4 | 2026-05-22 |
| CQH6523 | Spring Airlines | 4 | 2026-05-24 |
| CQH6411 | Spring Airlines | 4 | 2026-07-22 |
| CQH6294 | - | 4 | 2026-07-12 |
| CQH6293 | - | 4 | 2026-07-12 |
| CQH8688 | - | 3 | 2026-05-05 |
| CQH8552 | Spring Airlines | 3 | 2026-05-31 |
| CQH8551 | Spring Airlines | 3 | 2026-05-31 |
| CQH7260 | Spring Airlines | 3 | 2026-04-17 |
| CQH6987 | - | 3 | 2026-06-21 |
| CQH6921 | Spring Airlines | 3 | 2026-05-22 |
| CQH6524 | Spring Airlines | 3 | 2026-05-24 |
| CQH8920 | - | 2 | 2026-06-18 |
| CQH8782 | Spring Airlines | 2 | 2026-04-29 |
| CQH8781 | Spring Airlines | 2 | 2026-05-03 |
| CQH8687 | - | 2 | 2026-04-29 |
| CQH8665 | Spring Airlines | 2 | 2026-07-17 |
| CQH8559 | Spring Airlines | 2 | 2026-05-28 |
| CQH8521 | Spring Airlines | 2 | 2026-07-07 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CQH8666 | HKT → PVG | Jul 26, 04:45 UTC | Jul 26, 13:30 UTC | 8h 46m |
| 2026-07-24 | CQH6732 | - | Jul 24, 13:25 UTC | Jul 24, 13:50 UTC | 25m |
| 2026-07-24 | CQH6731 | - | Jul 24, 10:45 UTC | Jul 24, 11:10 UTC | 25m |
| 2026-07-24 | CQH7554 | - | Jul 24, 08:20 UTC | Jul 24, 08:30 UTC | 10m |
| 2026-07-23 | CQH6732 | - | Jul 23, 15:05 UTC | Jul 23, 15:25 UTC | 20m |
| 2026-07-23 | CQH6731 | - | Jul 23, 09:30 UTC | Jul 23, 12:45 UTC | 3h 15m |
| 2026-07-22 | CQH6411 | CGO → CGQ | Jul 22, 12:45 UTC | Jul 23, 09:30 UTC | 20h 45m |
| 2026-07-21 | CQH7135 | LHW → TSN | Jul 21, 01:30 UTC | Jul 21, 01:50 UTC | 20m |
| 2026-07-19 | CQH6466 | - | Jul 19, 08:30 UTC | Jul 19, 10:00 UTC | 1h 30m |
| 2026-07-19 | CQH6465 | NNG → BKK | Jul 19, 06:35 UTC | Jul 19, 07:00 UTC | 25m |
| 2026-07-19 | CQH6465 | NNG → BKK | Jul 19, 05:20 UTC | Jul 19, 05:40 UTC | 20m |
| 2026-07-17 | CQH8665 | PVG → HKT | Jul 17, 03:59 UTC | Jul 17, 12:00 UTC | 8h 0m |
| 2026-07-15 | CQH8665 | - | Jul 15, 04:05 UTC | Jul 15, 12:10 UTC | 8h 5m |
| 2026-07-13 | CQH7636 | - | Jul 13, 23:40 UTC | Jul 14, 03:15 UTC | 3h 35m |
| 2026-07-12 | CQH6294 | - | Jul 12, 20:05 UTC | Jul 12, 21:25 UTC | 1h 20m |
| 2026-07-12 | CQH6293 | - | Jul 12, 15:45 UTC | Jul 12, 17:10 UTC | 1h 25m |
| 2026-07-10 | CQH6775 | - | Jul 10, 15:05 UTC | Jul 11, 05:01 UTC | 13h 56m |
| 2026-07-10 | CQH6775 | - | Jul 10, 04:00 UTC | Jul 11, 00:10 UTC | 20h 10m |
| 2026-07-09 | CQH8716 | - | Jul 9, 06:00 UTC | Jul 10, 04:10 UTC | 22h 10m |
| 2026-07-09 | CQH8715 | - | Jul 9, 03:15 UTC | Jul 9, 04:30 UTC | 1h 15m |
| 2026-07-07 | CQH8521 | PVG → HKT | Jul 7, 01:55 UTC | Jul 7, 19:45 UTC | 17h 50m |
| 2026-07-06 | CQH8521 | PVG → HKT | Jul 6, 17:20 UTC | Jul 7, 14:55 UTC | 21h 35m |
| 2026-07-06 | CQH8516 | - | Jul 6, 16:30 UTC | Jul 7, 14:55 UTC | 22h 25m |
| 2026-07-06 | CQH8515 | - | Jul 6, 09:05 UTC | Jul 6, 15:00 UTC | 5h 55m |
| 2026-07-05 | CQH8832 | XIY → SHE | Jul 5, 23:40 UTC | Jul 6, 07:10 UTC | 7h 30m |
| 2026-07-04 | CQH6294 | - | Jul 4, 20:10 UTC | Jul 4, 21:35 UTC | 1h 25m |
| 2026-07-04 | CQH6293 | - | Jul 4, 16:55 UTC | Jul 4, 18:15 UTC | 1h 20m |
| 2026-06-29 | CQH6294 | - | Jun 29, 20:09 UTC | Jun 29, 21:34 UTC | 1h 25m |
| 2026-06-29 | CQH6293 | - | Jun 29, 17:10 UTC | Jun 29, 18:39 UTC | 1h 30m |
| 2026-06-28 | CQH7502 | - | Jun 28, 04:15 UTC | Jun 28, 10:15 UTC | 6h 0m |
| 2026-06-27 | CQH7501 | - | Jun 27, 12:29 UTC | Jun 28, 02:44 UTC | 14h 15m |
| 2026-06-22 | CQH7520 | - | Jun 22, 06:25 UTC | Jun 22, 06:35 UTC | 10m |
| 2026-06-21 | CQH7556 | SZX → SHA | Jun 21, 22:04 UTC | Jun 21, 22:15 UTC | 10m |
| 2026-06-21 | CQH6596 | TNA → SZX | Jun 21, 15:25 UTC | Jun 21, 15:49 UTC | 25m |
| 2026-06-21 | CQH6988 | - | Jun 21, 07:34 UTC | Jun 21, 09:10 UTC | 1h 35m |
| 2026-06-21 | CQH6987 | - | Jun 21, 04:39 UTC | Jun 21, 06:04 UTC | 1h 25m |
| 2026-06-20 | CQH6987 | - | Jun 20, 09:44 UTC | Jun 21, 06:04 UTC | 20h 20m |
| 2026-06-18 | CQH8920 | - | Jun 18, 10:20 UTC | Jun 18, 11:00 UTC | 40m |
| 2026-06-15 | CQH7282 | - | Jun 15, 09:49 UTC | Jun 15, 11:24 UTC | 1h 35m |
| 2026-06-15 | CQH7281 | - | Jun 15, 06:04 UTC | Jun 15, 08:10 UTC | 2h 5m |
| 2026-06-11 | CQH6411 | CGO → CGQ | Jun 11, 10:00 UTC | Jun 11, 10:15 UTC | 15m |
| 2026-06-08 | CQH6411 | CGO → CGQ | Jun 8, 10:15 UTC | Jun 8, 10:30 UTC | 15m |
| 2026-06-06 | CQH6411 | CGO → CGQ | Jun 6, 09:50 UTC | Jun 6, 10:09 UTC | 20m |
| 2026-06-02 | CQH8598 | HKG → PVG | Jun 2, 09:55 UTC | Jun 2, 14:05 UTC | 4h 10m |
| 2026-06-02 | CQH8597 | PVG → HKG | Jun 2, 04:40 UTC | Jun 2, 08:00 UTC | 3h 20m |
| 2026-05-31 | CQH8552 | SIN → PVG | May 31, 22:25 UTC | Jun 1, 02:40 UTC | 4h 15m |
| 2026-05-31 | CQH8551 | PVG → SIN | May 31, 10:40 UTC | May 31, 20:40 UTC | 10h 0m |
| 2026-05-29 | CQH8552 | SIN → PVG | May 29, 22:20 UTC | May 30, 02:40 UTC | 4h 20m |
| 2026-05-29 | CQH8551 | PVG → SIN | May 29, 10:50 UTC | May 29, 20:20 UTC | 9h 30m |
| 2026-05-29 | CQH7259 | PVG → PEN | May 29, 06:00 UTC | May 29, 06:15 UTC | 15m |
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-324F page for operator, model, and routing details .