sensors Mode-S transponder
781CD5
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-327J · AIRBUS A-320neo
- Hex
- 781CD5
- Octal
- 36016325
- Decimal
- 7,871,701
- Country
- CN
- Tail
- B-327J
- Type
- A20N
- Flights observed
- 25
- Distinct callsigns
- 19
- Country
- CN
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 781CD5 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 19 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CQH7385 | Spring Airlines | 3 | 2026-05-18 |
| CQH8875 | Spring Airlines | 2 | 2026-05-01 |
| CQH8598 | Spring Airlines | 2 | 2026-04-15 |
| CQH8522 | Spring Airlines | 2 | 2026-05-02 |
| CQH8521 | Spring Airlines | 2 | 2026-05-02 |
| CQH8952 | Spring Airlines | 1 | 2026-05-10 |
| CQH8951 | Spring Airlines | 1 | 2026-05-10 |
| CQH8876 | Spring Airlines | 1 | 2026-05-01 |
| CQH8597 | Spring Airlines | 1 | 2026-04-15 |
| CQH8552 | Spring Airlines | 1 | 2026-05-21 |
| CQH8551 | Spring Airlines | 1 | 2026-05-21 |
| CQH8534 | - | 1 | 2026-04-14 |
| CQH7596 | Spring Airlines | 1 | 2026-05-27 |
| CQH7520 | Spring Airlines | 1 | 2026-04-29 |
| CQH6732 | - | 1 | 2026-05-09 |
| CQH6731 | - | 1 | 2026-05-09 |
| CQH6538 | Spring Airlines | 1 | 2026-05-21 |
| CQH6411 | Spring Airlines | 1 | 2026-05-08 |
| CQH6245 | Spring Airlines | 1 | 2026-05-02 |
Recent flights last 25
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | CQH7596 | ZUH → YTY | May 27, 06:29 UTC | May 27, 06:40 UTC | 10m |
| 2026-05-21 | CQH8552 | SIN → PVG | May 21, 22:40 UTC | May 22, 01:40 UTC | 3h 0m |
| 2026-05-21 | CQH8551 | PVG → SIN | May 21, 17:25 UTC | May 21, 20:30 UTC | 3h 5m |
| 2026-05-21 | CQH6538 | FUK → PVG | May 21, 09:00 UTC | May 21, 09:10 UTC | 10m |
| 2026-05-18 | CQH7385 | NGB → SYX | May 18, 05:50 UTC | May 18, 14:25 UTC | 8h 35m |
| 2026-05-15 | CQH7385 | NGB → SYX | May 15, 11:10 UTC | May 15, 15:00 UTC | 3h 49m |
| 2026-05-12 | CQH7385 | NGB → SYX | May 12, 10:20 UTC | May 12, 13:51 UTC | 3h 30m |
| 2026-05-10 | CQH8952 | TPE → PVG | May 10, 04:15 UTC | May 10, 11:55 UTC | 7h 40m |
| 2026-05-10 | CQH8951 | PVG → TPE | May 10, 02:20 UTC | May 10, 02:55 UTC | 35m |
| 2026-05-09 | CQH6732 | - | May 9, 11:40 UTC | May 9, 12:00 UTC | 20m |
| 2026-05-09 | CQH6731 | - | May 9, 09:15 UTC | May 9, 09:45 UTC | 30m |
| 2026-05-08 | CQH6411 | CGO → CGQ | May 8, 09:59 UTC | May 9, 09:15 UTC | 23h 15m |
| 2026-05-02 | CQH8522 | HKT → PVG | May 2, 17:20 UTC | May 3, 11:35 UTC | 18h 14m |
| 2026-05-02 | CQH8522 | HKT → PVG | May 2, 14:15 UTC | May 3, 11:35 UTC | 21h 19m |
| 2026-05-02 | CQH8521 | PVG → HKT | May 2, 12:30 UTC | May 3, 10:50 UTC | 22h 19m |
| 2026-05-02 | CQH8521 | PVG → HKT | May 2, 06:05 UTC | May 3, 03:10 UTC | 21h 5m |
| 2026-05-02 | CQH6245 | PVG → OKA | May 2, 04:05 UTC | May 2, 04:25 UTC | 20m |
| 2026-05-01 | CQH8876 | MFM → PVG | May 1, 03:40 UTC | May 1, 04:40 UTC | 1h 0m |
| 2026-05-01 | CQH8875 | PVG → MFM | May 1, 02:00 UTC | May 1, 02:15 UTC | 15m |
| 2026-05-01 | CQH8875 | PVG → MFM | May 1, 00:55 UTC | May 1, 01:25 UTC | 30m |
| 2026-04-29 | CQH7520 | SZX → SHA | Apr 29, 08:15 UTC | Apr 29, 08:25 UTC | 10m |
| 2026-04-15 | CQH8598 | HKG → PVG | Apr 15, 11:35 UTC | Apr 15, 11:50 UTC | 15m |
| 2026-04-15 | CQH8598 | HKG → PVG | Apr 15, 08:35 UTC | Apr 15, 08:55 UTC | 20m |
| 2026-04-15 | CQH8597 | PVG → HKG | Apr 15, 03:40 UTC | Apr 15, 03:55 UTC | 15m |
| 2026-04-14 | CQH8534 | - | Apr 14, 17:50 UTC | Apr 14, 18:45 UTC | 55m |
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-327J page for operator, model, and routing details .