sensors Mode-S transponder
781589
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-302Q · AIRBUS A-321neo
- Hex
- 781589
- Octal
- 36012611
- Decimal
- 7,869,833
- Country
- CN
- Tail
- B-302Q
- Type
- A21N
- Flights observed
- 129
- Distinct callsigns
- 19
- Country
- CN
- Last broadcast
- 22h ago
Current position
Country allocation
The ICAO 24-bit address 781589 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 |
|---|---|---|---|
| CSC3993 | - | 32 | 2026-06-19 |
| CSC3994 | - | 20 | 2026-06-19 |
| CSC3909 | - | 12 | 2026-07-16 |
| CSC8764 | Sichuan Airlines | 8 | 2026-05-15 |
| CSC3708 | Sichuan Airlines | 8 | 2026-06-04 |
| CSC3707 | Sichuan Airlines | 8 | 2026-06-04 |
| CSC3995 | - | 7 | 2026-07-15 |
| CSC3931 | Sichuan Airlines | 6 | 2026-07-17 |
| CSC3910 | - | 6 | 2026-07-16 |
| CSC3122 | Sichuan Airlines | 4 | 2026-05-20 |
| CSC3121 | Sichuan Airlines | 4 | 2026-05-20 |
| CSC3996 | - | 3 | 2026-07-09 |
| CSC3935 | - | 3 | 2026-07-14 |
| CSC3932 | - | 3 | 2026-07-05 |
| CSC8894 | - | 1 | 2026-06-20 |
| CSC8702 | Sichuan Airlines | 1 | 2026-05-16 |
| CSC6880 | - | 1 | 2026-07-07 |
| CSC6879 | - | 1 | 2026-07-06 |
| CSC6788 | Sichuan Airlines | 1 | 2026-04-27 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | CSC3931 | TFU → HKT | Jul 17, 09:40 UTC | Jul 17, 13:29 UTC | 3h 50m |
| 2026-07-16 | CSC3931 | TFU → HKT | Jul 16, 12:20 UTC | Jul 17, 10:25 UTC | 22h 5m |
| 2026-07-16 | CSC3931 | TFU → HKT | Jul 16, 11:15 UTC | Jul 17, 10:15 UTC | 23h 0m |
| 2026-07-16 | CSC3910 | - | Jul 16, 09:25 UTC | Jul 16, 12:25 UTC | 3h 0m |
| 2026-07-16 | CSC3909 | - | Jul 16, 04:10 UTC | Jul 16, 07:45 UTC | 3h 35m |
| 2026-07-15 | CSC3909 | - | Jul 15, 09:10 UTC | Jul 16, 07:45 UTC | 22h 35m |
| 2026-07-15 | CSC3909 | - | Jul 15, 07:45 UTC | Jul 16, 06:00 UTC | 22h 15m |
| 2026-07-15 | CSC3995 | - | Jul 15, 06:00 UTC | Jul 15, 06:20 UTC | 20m |
| 2026-07-14 | CSC3995 | - | Jul 14, 11:10 UTC | Jul 15, 05:05 UTC | 17h 54m |
| 2026-07-14 | CSC3935 | - | Jul 14, 09:15 UTC | Jul 14, 09:45 UTC | 30m |
| 2026-07-14 | CSC3935 | - | Jul 14, 08:10 UTC | Jul 14, 08:35 UTC | 25m |
| 2026-07-13 | CSC3935 | - | Jul 13, 12:25 UTC | Jul 14, 08:35 UTC | 20h 10m |
| 2026-07-13 | CSC3910 | - | Jul 13, 11:10 UTC | Jul 14, 08:35 UTC | 21h 25m |
| 2026-07-13 | CSC3910 | - | Jul 13, 09:25 UTC | Jul 14, 08:15 UTC | 22h 50m |
| 2026-07-12 | CSC3909 | - | Jul 12, 12:20 UTC | Jul 13, 07:10 UTC | 18h 50m |
| 2026-07-12 | CSC3909 | - | Jul 12, 10:55 UTC | Jul 13, 07:10 UTC | 20h 15m |
| 2026-07-12 | CSC3909 | - | Jul 12, 09:20 UTC | Jul 13, 07:10 UTC | 21h 50m |
| 2026-07-12 | CSC3909 | - | Jul 12, 04:15 UTC | Jul 12, 07:05 UTC | 2h 50m |
| 2026-07-11 | CSC3909 | - | Jul 11, 09:05 UTC | Jul 12, 07:05 UTC | 22h 0m |
| 2026-07-11 | CSC3909 | - | Jul 11, 07:40 UTC | Jul 12, 05:35 UTC | 21h 55m |
| 2026-07-11 | CSC3995 | - | Jul 11, 05:40 UTC | Jul 11, 06:05 UTC | 25m |
| 2026-07-10 | CSC3995 | - | Jul 10, 10:40 UTC | Jul 11, 04:40 UTC | 18h 0m |
| 2026-07-10 | CSC3910 | - | Jul 10, 09:20 UTC | Jul 11, 04:40 UTC | 19h 20m |
| 2026-07-10 | CSC3909 | - | Jul 10, 04:10 UTC | Jul 10, 07:35 UTC | 3h 25m |
| 2026-07-09 | CSC3909 | - | Jul 9, 08:45 UTC | Jul 10, 07:35 UTC | 22h 50m |
| 2026-07-09 | CSC3996 | - | Jul 9, 07:35 UTC | Jul 10, 05:50 UTC | 22h 15m |
| 2026-07-09 | CSC3995 | - | Jul 9, 05:35 UTC | Jul 9, 06:00 UTC | 25m |
| 2026-07-09 | CSC3995 | - | Jul 9, 03:00 UTC | Jul 9, 04:40 UTC | 1h 40m |
| 2026-07-07 | CSC6880 | - | Jul 7, 00:35 UTC | Jul 7, 00:55 UTC | 20m |
| 2026-07-06 | CSC6879 | - | Jul 6, 15:50 UTC | Jul 6, 16:15 UTC | 25m |
| 2026-07-06 | CSC3996 | - | Jul 6, 07:40 UTC | Jul 6, 09:55 UTC | 2h 15m |
| 2026-07-06 | CSC3995 | - | Jul 6, 05:35 UTC | Jul 6, 05:55 UTC | 20m |
| 2026-07-05 | CSC3932 | - | Jul 5, 12:55 UTC | Jul 6, 04:35 UTC | 15h 40m |
| 2026-07-05 | CSC3931 | - | Jul 5, 08:35 UTC | Jul 6, 04:35 UTC | 20h 0m |
| 2026-07-04 | CSC3931 | - | Jul 4, 14:20 UTC | Jul 5, 13:55 UTC | 23h 35m |
| 2026-07-04 | CSC3932 | - | Jul 4, 12:55 UTC | Jul 5, 10:10 UTC | 21h 15m |
| 2026-07-04 | CSC3931 | - | Jul 4, 10:20 UTC | Jul 5, 10:10 UTC | 23h 50m |
| 2026-07-04 | CSC3932 | - | Jul 4, 09:45 UTC | Jul 4, 14:40 UTC | 4h 55m |
| 2026-06-26 | CSC3910 | - | Jun 26, 09:14 UTC | Jun 26, 11:14 UTC | 2h 0m |
| 2026-06-26 | CSC3909 | - | Jun 26, 05:19 UTC | Jun 26, 07:20 UTC | 2h 0m |
| 2026-06-20 | CSC8894 | - | Jun 20, 03:49 UTC | Jun 20, 04:09 UTC | 20m |
| 2026-06-19 | CSC3994 | - | Jun 19, 16:34 UTC | Jun 19, 18:30 UTC | 1h 55m |
| 2026-06-19 | CSC3993 | - | Jun 19, 14:09 UTC | Jun 19, 14:34 UTC | 25m |
| 2026-06-19 | CSC3993 | - | Jun 19, 12:39 UTC | Jun 19, 13:14 UTC | 35m |
| 2026-06-18 | CSC3994 | - | Jun 18, 16:20 UTC | Jun 19, 13:14 UTC | 20h 54m |
| 2026-06-18 | CSC3993 | - | Jun 18, 14:25 UTC | Jun 18, 14:40 UTC | 15m |
| 2026-06-18 | CSC3993 | - | Jun 18, 12:45 UTC | Jun 18, 13:30 UTC | 45m |
| 2026-06-17 | CSC3994 | - | Jun 17, 16:25 UTC | Jun 18, 13:30 UTC | 21h 5m |
| 2026-06-17 | CSC3993 | - | Jun 17, 14:30 UTC | Jun 17, 14:55 UTC | 25m |
| 2026-06-16 | CSC3993 | - | Jun 16, 18:20 UTC | Jun 17, 13:25 UTC | 19h 6m |
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-302Q page for operator, model, and routing details .