sensors Mode-S transponder
781F7D
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32EL · AIRBUS A-321neo
- Hex
- 781F7D
- Octal
- 36017575
- Decimal
- 7,872,381
- Country
- CN
- Tail
- B-32EL
- Type
- A21N
- Flights observed
- 42
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 10d ago
Last known position
Country allocation
The ICAO 24-bit address 781F7D 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 |
|---|---|---|---|
| CXA833 | Xiamen Airlines | 7 | 2026-05-23 |
| CXA834 | Xiamen Airlines | 5 | 2026-05-23 |
| CXA8315 | Xiamen Airlines | 3 | 2026-05-17 |
| CXA887 | Xiamen Airlines | 2 | 2026-05-09 |
| CXA864 | - | 2 | 2026-04-16 |
| CXA863 | Xiamen Airlines | 2 | 2026-04-16 |
| CXA8350 | Xiamen Airlines | 2 | 2026-05-07 |
| CXA8349 | Xiamen Airlines | 2 | 2026-05-07 |
| CXA8335 | Xiamen Airlines | 2 | 2026-05-13 |
| CXA8322 | Xiamen Airlines | 2 | 2026-04-20 |
| CXA888 | Xiamen Airlines | 1 | 2026-04-17 |
| CXA852 | Xiamen Airlines | 1 | 2026-04-26 |
| CXA851 | Xiamen Airlines | 1 | 2026-04-26 |
| CXA8402 | Xiamen Airlines | 1 | 2026-04-16 |
| CXA8376 | Xiamen Airlines | 1 | 2026-04-18 |
| CXA8375 | Xiamen Airlines | 1 | 2026-04-17 |
| CXA8359 | Xiamen Airlines | 1 | 2026-04-30 |
| CXA8321 | Xiamen Airlines | 1 | 2026-04-23 |
| CXA8320 | Xiamen Airlines | 1 | 2026-04-15 |
| CXA8316 | Xiamen Airlines | 1 | 2026-05-18 |
Recent flights last 42
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-23 | CXA834 | BKK → XMN | May 23, 10:50 UTC | May 23, 13:00 UTC | 2h 10m |
| 2026-05-23 | CXA833 | XMN → BKK | May 23, 06:40 UTC | May 23, 09:05 UTC | 2h 25m |
| 2026-05-18 | CXA8316 | HAK → HGH | May 18, 04:05 UTC | May 18, 04:15 UTC | 10m |
| 2026-05-17 | CXA8315 | HGH → HAK | May 17, 12:25 UTC | May 18, 01:15 UTC | 12h 50m |
| 2026-05-13 | CXA8335 | PKX → SZX | May 13, 01:55 UTC | May 13, 02:25 UTC | 30m |
| 2026-05-09 | CXA834 | BKK → XMN | May 9, 10:50 UTC | May 9, 13:05 UTC | 2h 15m |
| 2026-05-09 | CXA833 | XMN → BKK | May 9, 03:35 UTC | May 9, 09:25 UTC | 5h 50m |
| 2026-05-09 | CXA887 | XMN → TPE | May 9, 01:20 UTC | May 9, 01:50 UTC | 30m |
| 2026-05-08 | - | - | May 8, 02:55 UTC | May 8, 03:04 UTC | 10m |
| 2026-05-07 | CXA8350 | SZX → PKX | May 7, 14:25 UTC | May 7, 14:35 UTC | 10m |
| 2026-05-07 | CXA8349 | PKX → SZX | May 7, 12:25 UTC | May 7, 12:35 UTC | 10m |
| 2026-05-05 | CXA8350 | SZX → PKX | May 5, 12:55 UTC | May 5, 13:15 UTC | 20m |
| 2026-05-05 | CXA8349 | PKX → SZX | May 5, 10:40 UTC | May 5, 11:00 UTC | 20m |
| 2026-04-30 | CXA8359 | XMN → NNG | Apr 30, 10:15 UTC | Apr 30, 10:40 UTC | 25m |
| 2026-04-28 | CXA834 | BKK → XMN | Apr 28, 12:00 UTC | Apr 29, 03:19 UTC | 15h 20m |
| 2026-04-28 | CXA833 | XMN → BKK | Apr 28, 04:50 UTC | Apr 28, 10:35 UTC | 5h 45m |
| 2026-04-27 | CXA834 | BKK → XMN | Apr 27, 10:45 UTC | Apr 28, 02:55 UTC | 16h 10m |
| 2026-04-27 | CXA833 | XMN → BKK | Apr 27, 06:40 UTC | Apr 27, 09:15 UTC | 2h 35m |
| 2026-04-26 | CXA833 | XMN → BKK | Apr 26, 09:20 UTC | Apr 27, 09:15 UTC | 23h 55m |
| 2026-04-26 | CXA852 | SIN → XMN | Apr 26, 08:00 UTC | Apr 27, 07:05 UTC | 23h 5m |
| 2026-04-26 | CXA851 | XMN → SIN | Apr 26, 04:10 UTC | Apr 26, 05:55 UTC | 1h 45m |
| 2026-04-25 | CXA8127 | XMN → PKX | Apr 25, 01:35 UTC | Apr 25, 01:50 UTC | 15m |
| 2026-04-24 | CXA8335 | PKX → SZX | Apr 24, 06:10 UTC | Apr 24, 06:25 UTC | 15m |
| 2026-04-23 | CXA8321 | HGH → SYX | Apr 23, 00:40 UTC | Apr 23, 06:25 UTC | 5h 45m |
| 2026-04-22 | CXA8311 | HGH → CAN | Apr 22, 11:25 UTC | Apr 22, 12:10 UTC | 45m |
| 2026-04-21 | CXA8315 | HGH → HAK | Apr 21, 00:45 UTC | Apr 21, 03:50 UTC | 3h 5m |
| 2026-04-20 | CXA8315 | HGH → HAK | Apr 20, 07:20 UTC | Apr 21, 03:50 UTC | 20h 30m |
| 2026-04-20 | CXA8322 | SYX → HGH | Apr 20, 06:35 UTC | Apr 21, 03:50 UTC | 21h 15m |
| 2026-04-20 | CXA8322 | SYX → HGH | Apr 20, 00:40 UTC | Apr 20, 07:30 UTC | 6h 50m |
| 2026-04-18 | CXA834 | BKK → XMN | Apr 18, 10:50 UTC | Apr 18, 13:00 UTC | 2h 10m |
| 2026-04-18 | CXA833 | XMN → BKK | Apr 18, 08:50 UTC | Apr 18, 09:10 UTC | 20m |
| 2026-04-18 | CXA833 | XMN → BKK | Apr 18, 06:20 UTC | Apr 18, 07:05 UTC | 45m |
| 2026-04-18 | CXA8376 | NNG → XMN | Apr 18, 03:25 UTC | Apr 18, 03:40 UTC | 15m |
| 2026-04-17 | CXA8375 | XMN → NNG | Apr 17, 23:55 UTC | Apr 18, 00:20 UTC | 25m |
| 2026-04-17 | CXA888 | TPE → XMN | Apr 17, 03:35 UTC | Apr 17, 04:05 UTC | 30m |
| 2026-04-17 | CXA887 | XMN → TPE | Apr 17, 01:20 UTC | Apr 17, 01:50 UTC | 30m |
| 2026-04-16 | CXA864 | - | Apr 16, 15:15 UTC | Apr 16, 15:30 UTC | 15m |
| 2026-04-16 | CXA864 | - | Apr 16, 13:25 UTC | Apr 16, 15:10 UTC | 1h 45m |
| 2026-04-16 | CXA863 | HGH → SIN | Apr 16, 11:09 UTC | Apr 16, 11:44 UTC | 35m |
| 2026-04-16 | CXA863 | HGH → SIN | Apr 16, 09:10 UTC | Apr 16, 09:35 UTC | 25m |
| 2026-04-16 | CXA8402 | TFU → XMN | Apr 16, 06:00 UTC | Apr 16, 06:10 UTC | 10m |
| 2026-04-15 | CXA8320 | CAN → HGH | Apr 15, 05:00 UTC | Apr 15, 05:50 UTC | 50m |
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-32EL page for operator, model, and routing details .