sensors Mode-S transponder
781C0A
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-325C · AIRBUS A-320neo
- Hex
- 781C0A
- Octal
- 36016012
- Decimal
- 7,871,498
- Country
- CN
- Tail
- B-325C
- Type
- A20N
- Flights observed
- 48
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 781C0A 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 |
|---|---|---|---|
| CQH8597 | Spring Airlines | 3 | 2026-05-04 |
| CQH8934 | Spring Airlines | 2 | 2026-05-12 |
| CQH8779 | Spring Airlines | 2 | 2026-05-06 |
| CQH8755 | Spring Airlines | 2 | 2026-04-23 |
| CQH8598 | Spring Airlines | 2 | 2026-04-17 |
| CQH8522 | Spring Airlines | 2 | 2026-04-26 |
| CQH6516 | Spring Airlines | 2 | 2026-05-06 |
| CQH8952 | Spring Airlines | 1 | 2026-05-08 |
| CQH8951 | Spring Airlines | 1 | 2026-05-08 |
| CQH8950 | Spring Airlines | 1 | 2026-05-29 |
| CQH8949 | Spring Airlines | 1 | 2026-05-29 |
| CQH8933 | Spring Airlines | 1 | 2026-05-12 |
| CQH8892 | Spring Airlines | 1 | 2026-05-15 |
| CQH8891 | Spring Airlines | 1 | 2026-05-15 |
| CQH8875 | Spring Airlines | 1 | 2026-04-27 |
| CQH8790 | Spring Airlines | 1 | 2026-04-14 |
| CQH8756 | Spring Airlines | 1 | 2026-04-23 |
| CQH8716 | Spring Airlines | 1 | 2026-05-12 |
| CQH8715 | Spring Airlines | 1 | 2026-05-12 |
| CQH8671 | Spring Airlines | 1 | 2026-04-15 |
Recent flights last 48
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CQH8950 | SZX → SHA | May 29, 15:50 UTC | May 29, 16:00 UTC | 10m |
| 2026-05-29 | CQH8949 | SHA → SZX | May 29, 12:35 UTC | May 29, 13:45 UTC | 1h 10m |
| 2026-05-21 | CQH6732 | - | May 21, 12:00 UTC | May 21, 12:25 UTC | 25m |
| 2026-05-21 | CQH6731 | - | May 21, 09:35 UTC | May 21, 10:05 UTC | 30m |
| 2026-05-19 | CQH7135 | LHW → TSN | May 19, 00:50 UTC | May 19, 01:15 UTC | 25m |
| 2026-05-18 | CQH6538 | FUK → PVG | May 18, 09:15 UTC | May 18, 09:25 UTC | 10m |
| 2026-05-15 | CQH8892 | BKK → PVG | May 15, 07:10 UTC | May 15, 09:35 UTC | 2h 25m |
| 2026-05-15 | CQH8891 | PVG → BKK | May 15, 03:25 UTC | May 15, 05:40 UTC | 2h 15m |
| 2026-05-13 | CQH6218 | NRT → PVG | May 13, 11:20 UTC | May 13, 12:45 UTC | 1h 25m |
| 2026-05-13 | CQH6217 | PVG → NRT | May 13, 02:00 UTC | May 13, 10:00 UTC | 8h 0m |
| 2026-05-12 | CQH8933 | CAN → CNX | May 12, 22:31 UTC | May 13, 00:50 UTC | 2h 20m |
| 2026-05-12 | CQH8934 | CNX → CAN | May 12, 14:40 UTC | May 12, 15:01 UTC | 20m |
| 2026-05-12 | CQH8716 | HKG → PVG | May 12, 05:40 UTC | May 12, 13:45 UTC | 8h 5m |
| 2026-05-12 | CQH8715 | PVG → HKG | May 12, 03:20 UTC | May 12, 03:30 UTC | 10m |
| 2026-05-10 | CQH8521 | PVG → HKT | May 10, 12:25 UTC | May 10, 19:54 UTC | 7h 30m |
| 2026-05-09 | CQH6246 | OKA → PVG | May 9, 06:20 UTC | May 9, 06:35 UTC | 15m |
| 2026-05-09 | CQH6245 | PVG → OKA | May 9, 04:05 UTC | May 9, 04:15 UTC | 10m |
| 2026-05-08 | CQH8952 | TPE → PVG | May 8, 03:39 UTC | May 8, 04:19 UTC | 40m |
| 2026-05-08 | CQH8951 | PVG → TPE | May 8, 01:29 UTC | May 8, 02:09 UTC | 40m |
| 2026-05-06 | CQH6516 | KUL → PVG | May 6, 19:10 UTC | May 6, 20:05 UTC | 55m |
| 2026-05-06 | CQH6516 | KUL → PVG | May 6, 16:00 UTC | May 6, 16:15 UTC | 15m |
| 2026-05-06 | CQH6515 | PVG → KUL | May 6, 13:35 UTC | May 6, 14:05 UTC | 30m |
| 2026-05-06 | CQH8779 | SHA → SYX | May 6, 00:25 UTC | May 6, 10:35 UTC | 10h 10m |
| 2026-05-05 | CQH8779 | SHA → SYX | May 5, 02:15 UTC | May 6, 00:31 UTC | 22h 15m |
| 2026-05-04 | CQH8552 | SIN → PVG | May 4, 22:35 UTC | May 5, 02:25 UTC | 3h 50m |
| 2026-05-04 | CQH8551 | PVG → SIN | May 4, 08:45 UTC | May 4, 20:45 UTC | 12h 1m |
| 2026-05-04 | CQH8597 | PVG → HKG | May 4, 03:35 UTC | May 4, 06:50 UTC | 3h 15m |
| 2026-04-30 | CQH7286 | BKK → PVG | Apr 30, 02:00 UTC | Apr 30, 04:05 UTC | 2h 5m |
| 2026-04-29 | CQH7419 | CAN → BKK | Apr 29, 22:20 UTC | Apr 30, 00:40 UTC | 2h 19m |
| 2026-04-27 | CQH8934 | CNX → CAN | Apr 27, 14:30 UTC | Apr 27, 14:50 UTC | 20m |
| 2026-04-27 | CQH8511 | PVG → CNX | Apr 27, 04:15 UTC | Apr 27, 13:30 UTC | 9h 15m |
| 2026-04-27 | CQH8875 | PVG → MFM | Apr 27, 02:10 UTC | Apr 27, 02:25 UTC | 15m |
| 2026-04-26 | CQH8522 | HKT → PVG | Apr 26, 12:30 UTC | Apr 27, 01:25 UTC | 12h 55m |
| 2026-04-24 | CQH7050 | CJJ → PVG | Apr 24, 04:15 UTC | Apr 24, 04:55 UTC | 40m |
| 2026-04-23 | CQH8756 | BKK → PVG | Apr 23, 20:05 UTC | Apr 24, 02:55 UTC | 6h 50m |
| 2026-04-23 | CQH8755 | PVG → BKK | Apr 23, 03:00 UTC | Apr 23, 18:45 UTC | 15h 45m |
| 2026-04-22 | CQH8755 | PVG → BKK | Apr 22, 23:50 UTC | Apr 23, 18:45 UTC | 18h 55m |
| 2026-04-21 | CQH6775 | SHE → KHN | Apr 21, 04:35 UTC | Apr 21, 04:45 UTC | 10m |
| 2026-04-18 | CQH8522 | HKT → PVG | Apr 18, 12:25 UTC | Apr 18, 19:45 UTC | 7h 20m |
| 2026-04-17 | CQH8598 | HKG → PVG | Apr 17, 09:20 UTC | Apr 17, 10:15 UTC | 55m |
| 2026-04-17 | CQH8598 | HKG → PVG | Apr 17, 09:05 UTC | Apr 17, 09:15 UTC | 10m |
| 2026-04-17 | CQH8597 | PVG → HKG | Apr 17, 05:40 UTC | Apr 17, 07:15 UTC | 1h 35m |
| 2026-04-17 | CQH8597 | PVG → HKG | Apr 17, 03:45 UTC | Apr 17, 04:00 UTC | 15m |
| 2026-04-15 | CQH8671 | HIA → HRB | Apr 15, 22:35 UTC | Apr 15, 22:45 UTC | 10m |
| 2026-04-15 | CQH6482 | DOY → SZX | Apr 15, 17:20 UTC | Apr 15, 17:30 UTC | 10m |
| 2026-04-14 | CQH8790 | ICN → SJW | Apr 14, 10:50 UTC | Apr 14, 11:00 UTC | 10m |
| 2026-04-13 | CQH6466 | - | Apr 13, 08:45 UTC | Apr 13, 09:00 UTC | 15m |
| 2026-04-13 | CQH6465 | NNG → BKK | Apr 13, 06:40 UTC | Apr 13, 06:55 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-325C page for operator, model, and routing details .