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
- 43
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 3d ago
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 |
|---|---|---|---|
| CQH7285 | - | 3 | 2026-04-15 |
| CQH6516 | Spring Airlines | 3 | 2026-04-13 |
| CQH6294 | Spring Airlines | 3 | 2026-05-16 |
| CQH6293 | Spring Airlines | 3 | 2026-05-16 |
| CQH8933 | Spring Airlines | 2 | 2026-04-18 |
| CQH8779 | Spring Airlines | 2 | 2026-04-15 |
| CQH8552 | Spring Airlines | 2 | 2026-05-25 |
| CQH8551 | Spring Airlines | 2 | 2026-05-24 |
| CQH6515 | - | 2 | 2026-04-13 |
| CQH6411 | Spring Airlines | 2 | 2026-05-02 |
| CQH8952 | Spring Airlines | 1 | 2026-04-19 |
| CQH8951 | Spring Airlines | 1 | 2026-04-19 |
| CQH8920 | Spring Airlines | 1 | 2026-05-05 |
| CQH8762 | Spring Airlines | 1 | 2026-05-20 |
| CQH8761 | Spring Airlines | 1 | 2026-05-20 |
| CQH8598 | Spring Airlines | 1 | 2026-05-26 |
| CQH8597 | Spring Airlines | 1 | 2026-05-26 |
| CQH7609 | - | 1 | 2026-05-13 |
| CQH7518 | Spring Airlines | 1 | 2026-04-25 |
| CQH7363 | - | 1 | 2026-05-14 |
Recent flights last 43
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-26 | CQH8598 | HKG → PVG | May 26, 10:54 UTC | May 26, 15:05 UTC | 4h 10m |
| 2026-05-26 | CQH8597 | PVG → HKG | May 26, 06:04 UTC | May 26, 09:15 UTC | 3h 10m |
| 2026-05-25 | CQH8552 | SIN → PVG | May 25, 02:40 UTC | May 25, 03:40 UTC | 1h 0m |
| 2026-05-24 | CQH8551 | PVG → SIN | May 24, 01:40 UTC | May 24, 19:05 UTC | 17h 25m |
| 2026-05-23 | CQH8552 | SIN → PVG | May 23, 22:35 UTC | May 24, 19:05 UTC | 20h 30m |
| 2026-05-23 | CQH8551 | PVG → SIN | May 23, 17:15 UTC | May 23, 20:40 UTC | 3h 26m |
| 2026-05-20 | CQH8762 | HRB → SJW | May 20, 08:15 UTC | May 20, 08:25 UTC | 10m |
| 2026-05-20 | CQH8761 | SJW → HRB | May 20, 04:15 UTC | May 20, 04:30 UTC | 15m |
| 2026-05-16 | CQH6294 | BKK → XIY | May 16, 22:10 UTC | May 16, 23:00 UTC | 50m |
| 2026-05-16 | CQH6293 | XIY → BKK | May 16, 19:35 UTC | May 16, 20:30 UTC | 55m |
| 2026-05-14 | CQH7363 | - | May 14, 12:40 UTC | May 14, 23:20 UTC | 10h 40m |
| 2026-05-13 | CQH7609 | - | May 13, 23:20 UTC | May 14, 12:50 UTC | 13h 30m |
| 2026-05-13 | CQH6826 | - | May 13, 10:40 UTC | May 13, 23:35 UTC | 12h 55m |
| 2026-05-13 | CQH6825 | - | May 13, 06:55 UTC | May 13, 09:30 UTC | 2h 35m |
| 2026-05-07 | CQH6294 | BKK → XIY | May 7, 20:05 UTC | May 7, 21:00 UTC | 55m |
| 2026-05-07 | CQH6293 | XIY → BKK | May 7, 16:35 UTC | May 7, 17:30 UTC | 55m |
| 2026-05-06 | CQH6294 | BKK → XIY | May 6, 20:05 UTC | May 7, 17:30 UTC | 21h 25m |
| 2026-05-06 | CQH6293 | XIY → BKK | May 6, 16:25 UTC | May 6, 17:20 UTC | 55m |
| 2026-05-05 | CQH8920 | SHE → HGH | May 5, 09:55 UTC | May 5, 10:20 UTC | 25m |
| 2026-05-02 | CQH6411 | CGO → CGQ | May 2, 09:50 UTC | May 2, 10:05 UTC | 15m |
| 2026-04-29 | CQH6411 | CGO → CGQ | Apr 29, 10:00 UTC | Apr 29, 10:15 UTC | 15m |
| 2026-04-25 | CQH7206 | CJU → PKX | Apr 25, 13:30 UTC | Apr 25, 14:05 UTC | 35m |
| 2026-04-25 | CQH7205 | PKX → CJU | Apr 25, 10:55 UTC | Apr 25, 11:20 UTC | 25m |
| 2026-04-25 | CQH7518 | LHW → PKX | Apr 25, 07:20 UTC | Apr 25, 07:35 UTC | 15m |
| 2026-04-20 | CQH6892 | CAN → SHA | Apr 20, 02:40 UTC | Apr 20, 03:00 UTC | 20m |
| 2026-04-19 | CQH7008 | PNH → CAN | Apr 19, 16:10 UTC | Apr 19, 16:30 UTC | 20m |
| 2026-04-19 | CQH8952 | TPE → PVG | Apr 19, 04:40 UTC | Apr 19, 10:20 UTC | 5h 40m |
| 2026-04-19 | CQH8951 | PVG → TPE | Apr 19, 02:50 UTC | Apr 19, 03:15 UTC | 25m |
| 2026-04-18 | CQH8933 | CAN → CNX | Apr 18, 00:35 UTC | Apr 18, 00:45 UTC | 10m |
| 2026-04-17 | CQH8933 | CAN → CNX | Apr 17, 22:15 UTC | Apr 17, 22:40 UTC | 25m |
| 2026-04-17 | CQH7012 | - | Apr 17, 16:40 UTC | Apr 17, 16:55 UTC | 15m |
| 2026-04-17 | CQH7011 | - | Apr 17, 11:25 UTC | Apr 17, 11:35 UTC | 10m |
| 2026-04-15 | CQH7285 | - | Apr 15, 13:01 UTC | Apr 15, 13:20 UTC | 20m |
| 2026-04-15 | CQH7285 | - | Apr 15, 11:00 UTC | Apr 15, 12:55 UTC | 1h 55m |
| 2026-04-15 | CQH7285 | - | Apr 15, 10:45 UTC | Apr 15, 10:55 UTC | 10m |
| 2026-04-15 | CQH8779 | SHA → SYX | Apr 15, 00:55 UTC | Apr 15, 01:45 UTC | 50m |
| 2026-04-15 | CQH8779 | SHA → SYX | Apr 15, 00:30 UTC | Apr 15, 00:50 UTC | 20m |
| 2026-04-14 | CQH6246 | OKA → PVG | Apr 14, 06:20 UTC | Apr 14, 06:35 UTC | 15m |
| 2026-04-13 | CQH6516 | KUL → PVG | Apr 13, 19:45 UTC | Apr 13, 20:30 UTC | 45m |
| 2026-04-13 | CQH6516 | KUL → PVG | Apr 13, 19:35 UTC | Apr 13, 19:50 UTC | 15m |
| 2026-04-13 | CQH6516 | KUL → PVG | Apr 13, 16:30 UTC | Apr 13, 16:45 UTC | 15m |
| 2026-04-13 | CQH6515 | - | Apr 13, 14:00 UTC | Apr 13, 14:20 UTC | 20m |
| 2026-04-13 | CQH6515 | - | Apr 13, 09:50 UTC | Apr 13, 10:30 UTC | 40m |
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 .