sensors Mode-S transponder
781C9D
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-326R · AIRBUS A-320neo
- Hex
- 781C9D
- Octal
- 36016235
- Decimal
- 7,871,645
- Country
- CN
- Tail
- B-326R
- Type
- A20N
- Flights observed
- 71
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 781C9D 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 | 9 | 2026-05-30 |
| CQH8521 | Spring Airlines | 6 | 2026-05-07 |
| CQH8522 | Spring Airlines | 4 | 2026-05-08 |
| CQH7259 | Spring Airlines | 4 | 2026-05-03 |
| CQH6988 | - | 4 | 2026-04-17 |
| CQH6524 | Spring Airlines | 4 | 2026-05-30 |
| CQH8665 | Spring Airlines | 3 | 2026-05-06 |
| CQH6987 | - | 3 | 2026-04-17 |
| CQH8951 | Spring Airlines | 2 | 2026-05-22 |
| CQH8876 | Spring Airlines | 2 | 2026-05-09 |
| CQH8598 | Spring Airlines | 2 | 2026-06-01 |
| CQH8597 | Spring Airlines | 2 | 2026-06-01 |
| CQH8550 | Spring Airlines | 2 | 2026-04-28 |
| CQH8549 | Spring Airlines | 2 | 2026-04-28 |
| CQH7050 | Spring Airlines | 2 | 2026-05-21 |
| CQH7049 | Spring Airlines | 2 | 2026-05-21 |
| CQH6635 | Spring Airlines | 2 | 2026-05-04 |
| CQH8952 | Spring Airlines | 1 | 2026-04-23 |
| CQH8934 | Spring Airlines | 1 | 2026-05-10 |
| CQH8875 | Spring Airlines | 1 | 2026-05-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-01 | CQH8598 | HKG → PVG | Jun 1, 08:55 UTC | Jun 1, 09:20 UTC | 25m |
| 2026-06-01 | CQH8597 | PVG → HKG | Jun 1, 03:30 UTC | Jun 1, 06:40 UTC | 3h 10m |
| 2026-05-30 | CQH6524 | KUL → PVG | May 30, 12:50 UTC | May 30, 17:05 UTC | 4h 15m |
| 2026-05-30 | CQH6523 | PVG → KUL | May 30, 07:10 UTC | May 30, 11:35 UTC | 4h 25m |
| 2026-05-29 | CQH6523 | PVG → KUL | May 29, 14:15 UTC | May 30, 11:35 UTC | 21h 20m |
| 2026-05-29 | CQH6523 | PVG → KUL | May 29, 11:20 UTC | May 30, 11:15 UTC | 23h 55m |
| 2026-05-29 | CQH6523 | PVG → KUL | May 29, 11:05 UTC | May 30, 08:25 UTC | 21h 20m |
| 2026-05-29 | CQH6523 | PVG → KUL | May 29, 08:50 UTC | May 29, 09:20 UTC | 30m |
| 2026-05-28 | CQH6523 | PVG → KUL | May 28, 11:20 UTC | May 29, 05:55 UTC | 18h 35m |
| 2026-05-28 | CQH7282 | BKK → PVG | May 28, 09:50 UTC | May 29, 05:55 UTC | 20h 5m |
| 2026-05-28 | CQH7281 | PVG → BKK | May 28, 06:10 UTC | May 28, 08:35 UTC | 2h 25m |
| 2026-05-23 | CQH7286 | BKK → PVG | May 23, 01:50 UTC | May 23, 02:30 UTC | 40m |
| 2026-05-22 | CQH7419 | CAN → BKK | May 22, 22:15 UTC | May 23, 00:30 UTC | 2h 15m |
| 2026-05-22 | CQH7420 | BKK → CAN | May 22, 14:50 UTC | May 22, 15:35 UTC | 45m |
| 2026-05-22 | CQH7285 | - | May 22, 04:35 UTC | May 22, 13:05 UTC | 8h 30m |
| 2026-05-22 | CQH8951 | PVG → TPE | May 22, 02:25 UTC | May 22, 02:55 UTC | 30m |
| 2026-05-21 | CQH7050 | CJJ → PVG | May 21, 13:15 UTC | May 21, 13:40 UTC | 25m |
| 2026-05-21 | CQH7049 | PVG → CJJ | May 21, 11:25 UTC | May 21, 11:55 UTC | 30m |
| 2026-05-14 | CQH7050 | CJJ → PVG | May 14, 13:10 UTC | May 14, 13:30 UTC | 20m |
| 2026-05-14 | CQH7049 | PVG → CJJ | May 14, 11:25 UTC | May 14, 11:55 UTC | 30m |
| 2026-05-13 | CQH6524 | KUL → PVG | May 13, 10:35 UTC | May 13, 10:50 UTC | 15m |
| 2026-05-12 | CQH6523 | PVG → KUL | May 12, 17:55 UTC | May 13, 09:05 UTC | 15h 10m |
| 2026-05-12 | CQH7007 | - | May 12, 11:30 UTC | May 12, 11:40 UTC | 10m |
| 2026-05-10 | CQH8934 | CNX → CAN | May 10, 14:59 UTC | May 10, 15:24 UTC | 25m |
| 2026-05-10 | CQH8511 | PVG → CNX | May 10, 13:10 UTC | May 10, 13:40 UTC | 30m |
| 2026-05-09 | CQH8876 | MFM → PVG | May 9, 03:40 UTC | May 9, 04:40 UTC | 1h 0m |
| 2026-05-08 | CQH8522 | HKT → PVG | May 8, 12:25 UTC | May 9, 02:10 UTC | 13h 45m |
| 2026-05-07 | CQH8521 | PVG → HKT | May 7, 17:55 UTC | May 8, 17:15 UTC | 23h 20m |
| 2026-05-07 | CQH8521 | PVG → HKT | May 7, 15:35 UTC | May 8, 14:55 UTC | 23h 20m |
| 2026-05-07 | CQH8666 | HKT → PVG | May 7, 13:20 UTC | May 8, 12:44 UTC | 23h 24m |
| 2026-05-07 | CQH8773 | CAN → HKT | May 7, 11:05 UTC | May 7, 18:10 UTC | 7h 5m |
| 2026-05-06 | CQH8665 | PVG → HKT | May 6, 10:10 UTC | May 7, 02:15 UTC | 16h 4m |
| 2026-05-06 | CQH8665 | PVG → HKT | May 6, 06:00 UTC | May 7, 02:15 UTC | 20h 14m |
| 2026-05-06 | CQH8665 | PVG → HKT | May 6, 04:55 UTC | May 7, 02:15 UTC | 21h 20m |
| 2026-05-06 | CQH8875 | PVG → MFM | May 6, 03:00 UTC | May 6, 03:20 UTC | 20m |
| 2026-05-05 | CQH6524 | KUL → PVG | May 5, 11:05 UTC | May 6, 02:15 UTC | 15h 10m |
| 2026-05-05 | CQH6523 | PVG → KUL | May 5, 00:00 UTC | May 5, 09:30 UTC | 9h 30m |
| 2026-05-04 | CQH6636 | KUL → PVG | May 4, 20:55 UTC | May 4, 21:10 UTC | 15m |
| 2026-05-04 | CQH6635 | PVG → KUL | May 4, 19:10 UTC | May 4, 19:30 UTC | 20m |
| 2026-05-04 | CQH6635 | PVG → KUL | May 4, 01:55 UTC | May 4, 16:20 UTC | 14h 25m |
| 2026-05-03 | CQH7259 | PVG → PEN | May 3, 15:20 UTC | May 4, 15:15 UTC | 23h 55m |
| 2026-05-03 | CQH7259 | PVG → PEN | May 3, 14:45 UTC | May 4, 11:45 UTC | 21h 0m |
| 2026-05-03 | CQH6524 | KUL → PVG | May 3, 11:35 UTC | May 3, 11:50 UTC | 15m |
| 2026-05-03 | CQH6523 | PVG → KUL | May 3, 09:50 UTC | May 3, 10:10 UTC | 20m |
| 2026-05-02 | CQH8552 | SIN → PVG | May 2, 22:30 UTC | May 3, 06:20 UTC | 7h 49m |
| 2026-05-02 | CQH8551 | PVG → SIN | May 2, 01:35 UTC | May 2, 21:00 UTC | 19h 26m |
| 2026-05-01 | CQH7259 | PVG → PEN | May 1, 15:20 UTC | May 2, 11:30 UTC | 20h 10m |
| 2026-05-01 | CQH7259 | PVG → PEN | May 1, 15:10 UTC | May 2, 11:30 UTC | 20h 21m |
| 2026-05-01 | CQH8598 | HKG → PVG | May 1, 12:10 UTC | May 2, 10:40 UTC | 22h 30m |
| 2026-05-01 | CQH8597 | PVG → HKG | May 1, 07:15 UTC | May 1, 10:50 UTC | 3h 35m |
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-326R page for operator, model, and routing details .