sensors Mode-S transponder
781D3F
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-328H · AIRBUS A-320neo
- Hex
- 781D3F
- Octal
- 36016477
- Decimal
- 7,871,807
- Country
- CN
- Tail
- B-328H
- Type
- A20N
- Flights observed
- 63
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 41m ago
Last known position
Country allocation
The ICAO 24-bit address 781D3F 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 |
|---|---|---|---|
| CQH6523 | Spring Airlines | 8 | 2026-05-20 |
| CQH8597 | Spring Airlines | 4 | 2026-04-27 |
| CQH6524 | Spring Airlines | 4 | 2026-05-20 |
| CQH8521 | Spring Airlines | 3 | 2026-05-13 |
| CQH6515 | Spring Airlines | 3 | 2026-04-29 |
| CQH6293 | Spring Airlines | 3 | 2026-05-09 |
| CQH8952 | Spring Airlines | 2 | 2026-05-18 |
| CQH8951 | Spring Airlines | 2 | 2026-05-17 |
| CQH8920 | Spring Airlines | 2 | 2026-05-07 |
| CQH8875 | Spring Airlines | 2 | 2026-05-21 |
| CQH8715 | Spring Airlines | 2 | 2026-05-30 |
| CQH8598 | Spring Airlines | 2 | 2026-04-27 |
| CQH8550 | Spring Airlines | 2 | 2026-05-16 |
| CQH8549 | Spring Airlines | 2 | 2026-05-16 |
| CQH7496 | Spring Airlines | 2 | 2026-05-28 |
| CQH6516 | Spring Airlines | 2 | 2026-04-29 |
| CQH8933 | Spring Airlines | 1 | 2026-05-28 |
| CQH8892 | Spring Airlines | 1 | 2026-05-02 |
| CQH8891 | Spring Airlines | 1 | 2026-05-01 |
| CQH8716 | Spring Airlines | 1 | 2026-05-30 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | CQH8716 | HKG → PVG | May 30, 05:35 UTC | May 30, 05:45 UTC | 10m |
| 2026-05-30 | CQH8715 | PVG → HKG | May 30, 03:40 UTC | May 30, 03:55 UTC | 15m |
| 2026-05-30 | CQH8715 | PVG → HKG | May 30, 02:35 UTC | May 30, 03:00 UTC | 25m |
| 2026-05-29 | CQH8512 | CNX → PVG | May 29, 01:45 UTC | May 29, 02:55 UTC | 1h 10m |
| 2026-05-28 | CQH8933 | CAN → CNX | May 28, 22:25 UTC | May 29, 00:25 UTC | 2h 0m |
| 2026-05-28 | CQH7496 | SIN → CAN | May 28, 17:10 UTC | May 28, 17:40 UTC | 30m |
| 2026-05-28 | CQH7496 | SIN → CAN | May 28, 14:05 UTC | May 28, 14:30 UTC | 25m |
| 2026-05-28 | CQH7495 | CAN → SIN | May 28, 08:55 UTC | May 28, 12:20 UTC | 3h 25m |
| 2026-05-26 | CQH7432 | DMK → NGB | May 26, 07:10 UTC | May 26, 10:34 UTC | 3h 25m |
| 2026-05-26 | CQH7431 | NGB → BKK | May 26, 02:39 UTC | May 26, 05:34 UTC | 2h 55m |
| 2026-05-24 | CQH7286 | BKK → PVG | May 24, 01:55 UTC | May 24, 12:40 UTC | 10h 45m |
| 2026-05-24 | CQH7419 | CAN → BKK | May 24, 00:00 UTC | May 24, 00:40 UTC | 40m |
| 2026-05-21 | CQH7420 | BKK → CAN | May 21, 15:10 UTC | May 21, 15:35 UTC | 25m |
| 2026-05-21 | CQH7285 | - | May 21, 03:45 UTC | May 21, 13:45 UTC | 10h 0m |
| 2026-05-21 | CQH8875 | PVG → MFM | May 21, 02:00 UTC | May 21, 02:20 UTC | 20m |
| 2026-05-20 | CQH8875 | PVG → MFM | May 20, 14:00 UTC | May 21, 01:30 UTC | 11h 30m |
| 2026-05-20 | CQH6524 | KUL → PVG | May 20, 10:45 UTC | May 20, 11:05 UTC | 20m |
| 2026-05-20 | CQH6523 | PVG → KUL | May 20, 04:55 UTC | May 20, 09:15 UTC | 4h 20m |
| 2026-05-19 | CQH6245 | PVG → OKA | May 19, 04:10 UTC | May 19, 04:30 UTC | 20m |
| 2026-05-18 | CQH8952 | TPE → PVG | May 18, 03:25 UTC | May 18, 04:00 UTC | 35m |
| 2026-05-17 | CQH8951 | PVG → TPE | May 17, 10:35 UTC | May 18, 01:35 UTC | 15h 0m |
| 2026-05-17 | CQH6523 | PVG → KUL | May 17, 08:40 UTC | May 17, 09:00 UTC | 20m |
| 2026-05-16 | CQH8550 | SIN → PVG | May 16, 13:15 UTC | May 17, 05:15 UTC | 15h 59m |
| 2026-05-16 | CQH8549 | PVG → SIN | May 16, 08:20 UTC | May 16, 11:16 UTC | 2h 55m |
| 2026-05-13 | CQH8521 | PVG → HKT | May 13, 12:40 UTC | May 13, 19:55 UTC | 7h 15m |
| 2026-05-12 | CQH6524 | KUL → PVG | May 12, 14:15 UTC | May 13, 13:00 UTC | 22h 45m |
| 2026-05-12 | CQH6524 | KUL → PVG | May 12, 10:40 UTC | May 12, 15:15 UTC | 4h 35m |
| 2026-05-12 | CQH6523 | PVG → KUL | May 12, 08:50 UTC | May 12, 09:10 UTC | 20m |
| 2026-05-12 | CQH6523 | PVG → KUL | May 12, 04:50 UTC | May 12, 06:05 UTC | 1h 15m |
| 2026-05-09 | CQH6294 | BKK → XIY | May 9, 20:10 UTC | May 9, 21:05 UTC | 55m |
| 2026-05-09 | CQH6293 | XIY → BKK | May 9, 16:20 UTC | May 9, 17:25 UTC | 1h 5m |
| 2026-05-08 | CQH6293 | XIY → BKK | May 8, 20:10 UTC | May 9, 17:25 UTC | 21h 15m |
| 2026-05-08 | CQH6293 | XIY → BKK | May 8, 16:50 UTC | May 8, 17:40 UTC | 50m |
| 2026-05-07 | CQH8920 | SHE → HGH | May 7, 06:35 UTC | May 7, 10:00 UTC | 3h 25m |
| 2026-05-04 | CQH8920 | SHE → HGH | May 4, 09:45 UTC | May 4, 10:15 UTC | 30m |
| 2026-05-02 | CQH8892 | BKK → PVG | May 2, 06:35 UTC | May 2, 08:50 UTC | 2h 15m |
| 2026-05-01 | CQH8891 | PVG → BKK | May 1, 12:40 UTC | May 2, 05:00 UTC | 16h 20m |
| 2026-05-01 | CQH6523 | PVG → KUL | May 1, 09:10 UTC | May 1, 10:00 UTC | 50m |
| 2026-04-30 | CQH6636 | KUL → PVG | Apr 30, 20:55 UTC | May 1, 06:25 UTC | 9h 30m |
| 2026-04-30 | CQH6635 | PVG → KUL | Apr 30, 19:00 UTC | Apr 30, 19:15 UTC | 15m |
| 2026-04-29 | CQH7259 | PVG → PEN | Apr 29, 22:30 UTC | Apr 30, 16:05 UTC | 17h 34m |
| 2026-04-29 | CQH6516 | KUL → PVG | Apr 29, 18:50 UTC | Apr 29, 19:05 UTC | 15m |
| 2026-04-29 | CQH6515 | PVG → KUL | Apr 29, 12:10 UTC | Apr 29, 16:30 UTC | 4h 20m |
| 2026-04-27 | CQH7057 | PVG → UBN | Apr 27, 12:50 UTC | Apr 28, 06:50 UTC | 18h 0m |
| 2026-04-27 | CQH8598 | HKG → PVG | Apr 27, 09:55 UTC | Apr 28, 06:50 UTC | 20h 55m |
| 2026-04-27 | CQH8597 | PVG → HKG | Apr 27, 05:00 UTC | Apr 27, 08:10 UTC | 3h 10m |
| 2026-04-21 | CQH8550 | SIN → PVG | Apr 21, 13:20 UTC | Apr 21, 17:20 UTC | 4h 0m |
| 2026-04-21 | CQH8549 | PVG → SIN | Apr 21, 03:20 UTC | Apr 21, 10:35 UTC | 7h 15m |
| 2026-04-20 | CQH6516 | KUL → PVG | Apr 20, 16:00 UTC | Apr 21, 01:50 UTC | 9h 50m |
| 2026-04-20 | CQH6515 | PVG → KUL | Apr 20, 14:15 UTC | Apr 20, 14:35 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-328H page for operator, model, and routing details .