sensors Mode-S transponder
781D68
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-328U · AIRBUS A-320neo
- Hex
- 781D68
- Octal
- 36016550
- Decimal
- 7,871,848
- Country
- CN
- Tail
- B-328U
- Type
- A20N
- Flights observed
- 114
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- Jul 26, 19:10 UTC
Last known position
Country allocation
The ICAO 24-bit address 781D68 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 |
|---|---|---|---|
| CQH7200 | Spring Airlines | 6 | 2026-07-26 |
| CQH7199 | Spring Airlines | 6 | 2026-07-26 |
| CQH8552 | Spring Airlines | 5 | 2026-07-20 |
| CQH7285 | - | 5 | 2026-07-02 |
| CQH6523 | - | 5 | 2026-07-18 |
| CQH8551 | Spring Airlines | 4 | 2026-07-20 |
| CQH8521 | Spring Airlines | 4 | 2026-07-08 |
| CQH8597 | Spring Airlines | 3 | 2026-07-20 |
| CQH6922 | - | 3 | 2026-07-03 |
| CQH6921 | - | 3 | 2026-07-03 |
| CQH6524 | - | 3 | 2026-07-18 |
| CQH6516 | Spring Airlines | 3 | 2026-04-13 |
| CQH6294 | Spring Airlines | 3 | 2026-05-16 |
| CQH6293 | Spring Airlines | 3 | 2026-05-16 |
| CQH8934 | - | 2 | 2026-07-14 |
| CQH8933 | Spring Airlines | 2 | 2026-04-18 |
| CQH8779 | Spring Airlines | 2 | 2026-04-15 |
| CQH8598 | Spring Airlines | 2 | 2026-06-09 |
| CQH8511 | - | 2 | 2026-07-14 |
| CQH7420 | - | 2 | 2026-07-02 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CQH7200 | CGK → CAN | Jul 26, 19:00 UTC | Jul 26, 19:10 UTC | 10m |
| 2026-07-26 | CQH7200 | CGK → CAN | Jul 26, 14:40 UTC | Jul 26, 16:10 UTC | 1h 30m |
| 2026-07-26 | CQH7199 | CAN → CGK | Jul 26, 13:15 UTC | Jul 26, 13:30 UTC | 15m |
| 2026-07-26 | CQH7199 | CAN → CGK | Jul 26, 09:10 UTC | Jul 26, 09:20 UTC | 10m |
| 2026-07-25 | CQH8771 | CAN → HKT | Jul 25, 23:40 UTC | Jul 26, 04:30 UTC | 4h 50m |
| 2026-07-25 | CQH7392 | SJW → CAN | Jul 25, 16:20 UTC | Jul 25, 16:30 UTC | 10m |
| 2026-07-25 | CQH8790 | ICN → SJW | Jul 25, 11:20 UTC | Jul 25, 11:45 UTC | 25m |
| 2026-07-25 | CQH8789 | SJW → ICN | Jul 25, 09:20 UTC | Jul 25, 09:40 UTC | 20m |
| 2026-07-25 | CQH8662 | CGQ → SJW | Jul 25, 06:20 UTC | Jul 25, 06:30 UTC | 10m |
| 2026-07-24 | CQH8782 | HKT → SZX | Jul 24, 18:55 UTC | Jul 24, 19:05 UTC | 10m |
| 2026-07-24 | CQH7653 | TFU → HKT | Jul 24, 12:40 UTC | Jul 24, 17:10 UTC | 4h 30m |
| 2026-07-21 | CQH6538 | - | Jul 21, 09:15 UTC | Jul 21, 09:40 UTC | 25m |
| 2026-07-21 | CQH6537 | PVG → FUK | Jul 21, 07:00 UTC | Jul 21, 07:35 UTC | 35m |
| 2026-07-20 | CQH8552 | SIN → PVG | Jul 20, 22:30 UTC | Jul 21, 02:35 UTC | 4h 5m |
| 2026-07-20 | CQH8551 | PVG → SIN | Jul 20, 08:45 UTC | Jul 20, 21:15 UTC | 12h 30m |
| 2026-07-20 | CQH8597 | PVG → HKG | Jul 20, 03:35 UTC | Jul 20, 06:50 UTC | 3h 15m |
| 2026-07-19 | CQH8552 | SIN → PVG | Jul 19, 04:10 UTC | Jul 20, 03:45 UTC | 23h 35m |
| 2026-07-19 | CQH8552 | SIN → PVG | Jul 19, 00:40 UTC | Jul 19, 04:45 UTC | 4h 5m |
| 2026-07-18 | CQH8551 | PVG → SIN | Jul 18, 23:05 UTC | Jul 18, 23:20 UTC | 15m |
| 2026-07-18 | CQH6524 | - | Jul 18, 10:45 UTC | Jul 18, 20:15 UTC | 9h 30m |
| 2026-07-18 | CQH6523 | - | Jul 18, 05:25 UTC | Jul 18, 09:35 UTC | 4h 10m |
| 2026-07-16 | CQH7286 | - | Jul 16, 01:55 UTC | Jul 16, 04:15 UTC | 2h 20m |
| 2026-07-15 | CQH7419 | - | Jul 15, 22:05 UTC | Jul 15, 22:25 UTC | 20m |
| 2026-07-14 | CQH8934 | - | Jul 14, 14:35 UTC | Jul 14, 15:50 UTC | 1h 15m |
| 2026-07-14 | CQH8511 | - | Jul 14, 12:15 UTC | Jul 14, 13:30 UTC | 1h 15m |
| 2026-07-10 | CQH7462 | - | Jul 10, 15:55 UTC | Jul 10, 16:15 UTC | 20m |
| 2026-07-10 | CQH7461 | - | Jul 10, 13:05 UTC | Jul 10, 13:20 UTC | 15m |
| 2026-07-09 | CQH8876 | - | Jul 9, 05:00 UTC | Jul 9, 06:25 UTC | 1h 25m |
| 2026-07-08 | CQH8521 | PVG → HKT | Jul 8, 13:15 UTC | Jul 9, 03:20 UTC | 14h 5m |
| 2026-07-08 | CQH8521 | PVG → HKT | Jul 8, 00:50 UTC | Jul 8, 19:40 UTC | 18h 50m |
| 2026-07-03 | CQH7200 | - | Jul 3, 21:00 UTC | Jul 3, 21:20 UTC | 20m |
| 2026-07-03 | CQH7200 | - | Jul 3, 16:45 UTC | Jul 3, 18:20 UTC | 1h 35m |
| 2026-07-03 | CQH7199 | - | Jul 3, 14:50 UTC | Jul 3, 15:10 UTC | 20m |
| 2026-07-03 | CQH7199 | - | Jul 3, 10:35 UTC | Jul 3, 10:55 UTC | 20m |
| 2026-07-03 | CQH6922 | - | Jul 3, 02:45 UTC | Jul 3, 03:05 UTC | 20m |
| 2026-07-03 | CQH6921 | - | Jul 3, 00:55 UTC | Jul 3, 01:10 UTC | 15m |
| 2026-07-02 | CQH6921 | - | Jul 2, 21:45 UTC | Jul 2, 21:55 UTC | 10m |
| 2026-07-02 | CQH7420 | - | Jul 2, 14:50 UTC | Jul 2, 16:25 UTC | 1h 35m |
| 2026-07-02 | CQH7285 | - | Jul 2, 11:00 UTC | Jul 2, 13:30 UTC | 2h 30m |
| 2026-06-28 | CQH7200 | - | Jun 28, 18:59 UTC | Jun 28, 19:20 UTC | 20m |
| 2026-06-28 | CQH7200 | - | Jun 28, 14:45 UTC | Jun 28, 16:14 UTC | 1h 30m |
| 2026-06-28 | CQH7199 | - | Jun 28, 13:04 UTC | Jun 28, 13:19 UTC | 15m |
| 2026-06-28 | CQH7199 | - | Jun 28, 09:05 UTC | Jun 28, 09:15 UTC | 10m |
| 2026-06-28 | CQH6922 | - | Jun 28, 05:55 UTC | Jun 28, 06:15 UTC | 20m |
| 2026-06-28 | CQH6922 | - | Jun 28, 02:39 UTC | Jun 28, 02:54 UTC | 15m |
| 2026-06-28 | CQH6921 | - | Jun 28, 00:45 UTC | Jun 28, 01:04 UTC | 20m |
| 2026-06-26 | CQH8934 | - | Jun 26, 14:25 UTC | Jun 26, 15:49 UTC | 1h 25m |
| 2026-06-26 | CQH8511 | - | Jun 26, 11:40 UTC | Jun 26, 13:04 UTC | 1h 25m |
| 2026-06-25 | CQH7286 | - | Jun 25, 01:54 UTC | Jun 25, 04:20 UTC | 2h 25m |
| 2026-06-24 | CQH7419 | - | Jun 24, 22:39 UTC | Jun 25, 00:44 UTC | 2h 5m |
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-328U page for operator, model, and routing details .