sensors Mode-S transponder
781EAD
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32CY · AIRBUS A-321neo
- Hex
- 781EAD
- Octal
- 36017255
- Decimal
- 7,872,173
- Country
- CN
- Tail
- B-32CY
- Type
- A21N
- Flights observed
- 104
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 781EAD 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 |
|---|---|---|---|
| CXA834 | - | 11 | 2026-06-24 |
| CXA887 | - | 9 | 2026-06-22 |
| CXA833 | - | 9 | 2026-06-24 |
| CXA8321 | - | 9 | 2026-07-04 |
| CXA8070 | - | 7 | 2026-07-12 |
| CXA851 | - | 5 | 2026-07-01 |
| CXA8536 | - | 4 | 2026-06-10 |
| CXA852 | - | 4 | 2026-07-01 |
| CXA8350 | Xiamen Airlines | 4 | 2026-06-04 |
| CXA888 | - | 3 | 2026-06-18 |
| CXA8397 | - | 3 | 2026-05-10 |
| CXA8375 | - | 3 | 2026-06-18 |
| CXA8816 | - | 2 | 2026-07-15 |
| CXA864 | - | 2 | 2026-07-05 |
| CXA863 | - | 2 | 2026-07-05 |
| CXA8398 | - | 2 | 2026-05-03 |
| CXA8360 | - | 2 | 2026-07-09 |
| CXA8349 | Xiamen Airlines | 2 | 2026-06-04 |
| CXA8322 | - | 2 | 2026-07-13 |
| CXA8315 | Xiamen Airlines | 2 | 2026-06-07 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-15 | CXA8816 | - | Jul 15, 12:40 UTC | Jul 16, 00:30 UTC | 11h 50m |
| 2026-07-14 | CXA8319 | - | Jul 14, 02:25 UTC | Jul 14, 02:40 UTC | 15m |
| 2026-07-13 | CXA8322 | - | Jul 13, 04:10 UTC | Jul 14, 01:55 UTC | 21h 45m |
| 2026-07-12 | CXA8070 | - | Jul 12, 13:50 UTC | Jul 13, 04:10 UTC | 14h 20m |
| 2026-07-12 | CXA8070 | - | Jul 12, 06:45 UTC | Jul 13, 04:10 UTC | 21h 25m |
| 2026-07-12 | CXA8070 | - | Jul 12, 03:35 UTC | Jul 13, 00:55 UTC | 21h 20m |
| 2026-07-11 | CXA8070 | - | Jul 11, 12:50 UTC | Jul 12, 06:55 UTC | 18h 5m |
| 2026-07-11 | CXA8070 | - | Jul 11, 10:25 UTC | Jul 12, 06:55 UTC | 20h 30m |
| 2026-07-09 | CXA8360 | - | Jul 9, 15:45 UTC | Jul 9, 15:55 UTC | 10m |
| 2026-07-08 | CXA8070 | - | Jul 8, 12:55 UTC | Jul 8, 13:45 UTC | 50m |
| 2026-07-07 | CXA8070 | - | Jul 7, 15:35 UTC | Jul 8, 13:45 UTC | 22h 10m |
| 2026-07-07 | CXA8359 | - | Jul 7, 10:25 UTC | Jul 7, 15:40 UTC | 5h 15m |
| 2026-07-05 | CXA864 | - | Jul 5, 13:10 UTC | Jul 5, 14:00 UTC | 50m |
| 2026-07-05 | CXA863 | - | Jul 5, 09:25 UTC | Jul 5, 11:40 UTC | 2h 15m |
| 2026-07-04 | CXA8321 | - | Jul 4, 03:10 UTC | Jul 4, 03:25 UTC | 15m |
| 2026-07-03 | CXA8322 | - | Jul 3, 04:20 UTC | Jul 4, 03:15 UTC | 22h 55m |
| 2026-07-03 | CXA8321 | - | Jul 3, 00:45 UTC | Jul 3, 04:30 UTC | 3h 45m |
| 2026-07-01 | CXA852 | - | Jul 1, 07:40 UTC | Jul 1, 08:10 UTC | 30m |
| 2026-07-01 | CXA851 | - | Jul 1, 02:25 UTC | Jul 1, 05:35 UTC | 3h 10m |
| 2026-06-30 | CXA851 | - | Jun 30, 10:35 UTC | Jul 1, 05:35 UTC | 19h 0m |
| 2026-06-29 | CXA8539 | - | Jun 29, 01:55 UTC | Jun 29, 02:09 UTC | 15m |
| 2026-06-28 | CXA852 | - | Jun 28, 07:44 UTC | Jun 28, 10:55 UTC | 3h 10m |
| 2026-06-28 | CXA851 | - | Jun 28, 02:10 UTC | Jun 28, 05:24 UTC | 3h 15m |
| 2026-06-27 | CXA851 | - | Jun 27, 07:45 UTC | Jun 28, 05:24 UTC | 21h 40m |
| 2026-06-27 | CXA851 | - | Jun 27, 02:39 UTC | Jun 27, 05:49 UTC | 3h 10m |
| 2026-06-26 | CXA8394 | SYX → PKX | Jun 26, 04:59 UTC | Jun 27, 02:39 UTC | 21h 40m |
| 2026-06-26 | CXA8393 | PKX → SYX | Jun 26, 02:24 UTC | Jun 26, 05:10 UTC | 2h 45m |
| 2026-06-24 | CXA834 | - | Jun 24, 10:55 UTC | Jun 24, 13:10 UTC | 2h 15m |
| 2026-06-24 | CXA833 | - | Jun 24, 06:50 UTC | Jun 24, 09:05 UTC | 2h 15m |
| 2026-06-22 | CXA834 | - | Jun 22, 11:00 UTC | Jun 22, 13:14 UTC | 2h 15m |
| 2026-06-22 | CXA833 | - | Jun 22, 03:24 UTC | Jun 22, 08:50 UTC | 5h 25m |
| 2026-06-22 | CXA887 | - | Jun 22, 01:29 UTC | Jun 22, 02:00 UTC | 30m |
| 2026-06-21 | CXA844 | - | Jun 21, 19:14 UTC | Jun 21, 21:34 UTC | 2h 20m |
| 2026-06-21 | CXA843 | - | Jun 21, 15:30 UTC | Jun 21, 17:50 UTC | 2h 20m |
| 2026-06-21 | CXA852 | - | Jun 21, 11:00 UTC | Jun 21, 11:30 UTC | 30m |
| 2026-06-21 | CXA852 | - | Jun 21, 07:45 UTC | Jun 21, 08:15 UTC | 30m |
| 2026-06-20 | CXA834 | - | Jun 20, 11:20 UTC | Jun 21, 05:30 UTC | 18h 10m |
| 2026-06-20 | CXA834 | - | Jun 20, 10:59 UTC | Jun 21, 05:30 UTC | 18h 30m |
| 2026-06-20 | CXA833 | TPE → BKK | Jun 20, 03:19 UTC | Jun 20, 08:49 UTC | 5h 30m |
| 2026-06-20 | CXA887 | - | Jun 20, 01:05 UTC | Jun 20, 01:39 UTC | 35m |
| 2026-06-18 | CXA8375 | - | Jun 18, 23:30 UTC | Jun 19, 00:34 UTC | 1h 4m |
| 2026-06-18 | CXA834 | - | Jun 18, 12:05 UTC | Jun 18, 14:30 UTC | 2h 25m |
| 2026-06-18 | CXA833 | - | Jun 18, 07:00 UTC | Jun 18, 09:45 UTC | 2h 45m |
| 2026-06-18 | CXA888 | - | Jun 18, 03:35 UTC | Jun 18, 04:30 UTC | 55m |
| 2026-06-18 | CXA887 | - | Jun 18, 01:10 UTC | Jun 18, 01:45 UTC | 35m |
| 2026-06-13 | CXA8321 | - | Jun 13, 00:35 UTC | Jun 13, 00:45 UTC | 10m |
| 2026-06-10 | CXA8441 | - | Jun 10, 09:55 UTC | Jun 10, 10:05 UTC | 10m |
| 2026-06-10 | CXA8536 | - | Jun 10, 07:40 UTC | Jun 10, 08:10 UTC | 30m |
| 2026-06-08 | CXA8321 | HGH → SYX | Jun 8, 00:40 UTC | Jun 8, 04:25 UTC | 3h 45m |
| 2026-06-07 | CXA8316 | HAK → HGH | Jun 7, 03:30 UTC | Jun 8, 01:10 UTC | 21h 40m |
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-32CY page for operator, model, and routing details .