sensors Mode-S transponder
781AE8
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-321Y · AIRBUS A-320
- Hex
- 781AE8
- Octal
- 36015350
- Decimal
- 7,871,208
- Country
- CN
- Tail
- B-321Y
- Type
- A320
- Flights observed
- 34
- Distinct callsigns
- 17
- Country
- CN
- Last broadcast
- 11h ago
Last known position
Country allocation
The ICAO 24-bit address 781AE8 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 17 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UEA2867 | - | 5 | 2026-07-18 |
| UEA2713 | - | 5 | 2026-07-09 |
| UEA2868 | - | 4 | 2026-07-18 |
| UEA1869 | - | 3 | 2026-07-10 |
| UEA2861 | - | 2 | 2026-07-15 |
| UEA2264 | United Eagle Airlines | 2 | 2026-05-23 |
| UEA2254 | - | 2 | 2026-07-13 |
| UEA2253 | - | 2 | 2026-07-13 |
| UEA2787 | United Eagle Airlines | 1 | 2026-06-10 |
| UEA2714 | United Eagle Airlines | 1 | 2026-05-29 |
| UEA2414 | United Eagle Airlines | 1 | 2026-06-17 |
| UEA2303 | - | 1 | 2026-06-30 |
| UEA2288 | - | 1 | 2026-07-05 |
| UEA1873 | - | 1 | 2026-07-12 |
| UEA1858 | - | 1 | 2026-06-22 |
| UEA1848 | - | 1 | 2026-07-08 |
| UEA1844 | - | 1 | 2026-05-26 |
Recent flights last 34
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-18 | UEA2868 | - | Jul 18, 15:30 UTC | Jul 18, 16:00 UTC | 30m |
| 2026-07-18 | UEA2868 | - | Jul 18, 14:40 UTC | Jul 18, 14:50 UTC | 10m |
| 2026-07-18 | UEA2867 | - | Jul 18, 06:25 UTC | Jul 18, 12:50 UTC | 6h 25m |
| 2026-07-16 | UEA2868 | - | Jul 16, 15:00 UTC | Jul 16, 16:25 UTC | 1h 25m |
| 2026-07-16 | UEA2867 | - | Jul 16, 11:40 UTC | Jul 16, 13:25 UTC | 1h 45m |
| 2026-07-15 | UEA2867 | - | Jul 15, 15:25 UTC | Jul 16, 13:25 UTC | 22h 0m |
| 2026-07-15 | UEA2861 | - | Jul 15, 13:45 UTC | Jul 15, 14:15 UTC | 30m |
| 2026-07-14 | UEA2868 | - | Jul 14, 14:35 UTC | Jul 15, 14:00 UTC | 23h 24m |
| 2026-07-14 | UEA2867 | - | Jul 14, 12:45 UTC | Jul 14, 13:05 UTC | 20m |
| 2026-07-14 | UEA2867 | - | Jul 14, 11:30 UTC | Jul 14, 11:45 UTC | 15m |
| 2026-07-13 | UEA2254 | - | Jul 13, 07:30 UTC | Jul 13, 07:50 UTC | 20m |
| 2026-07-13 | UEA2254 | - | Jul 13, 05:10 UTC | Jul 13, 05:20 UTC | 10m |
| 2026-07-13 | UEA2253 | - | Jul 13, 03:45 UTC | Jul 13, 03:55 UTC | 10m |
| 2026-07-13 | UEA2253 | - | Jul 13, 01:15 UTC | Jul 13, 01:30 UTC | 15m |
| 2026-07-12 | UEA1873 | - | Jul 12, 13:50 UTC | Jul 12, 14:15 UTC | 25m |
| 2026-07-10 | UEA1869 | - | Jul 10, 01:25 UTC | Jul 10, 12:50 UTC | 11h 25m |
| 2026-07-09 | UEA1869 | - | Jul 9, 13:45 UTC | Jul 10, 09:20 UTC | 19h 35m |
| 2026-07-09 | UEA1869 | - | Jul 9, 09:30 UTC | Jul 10, 06:35 UTC | 21h 5m |
| 2026-07-09 | UEA2713 | - | Jul 9, 06:10 UTC | Jul 10, 02:05 UTC | 19h 55m |
| 2026-07-09 | UEA2713 | - | Jul 9, 01:40 UTC | Jul 9, 13:50 UTC | 12h 10m |
| 2026-07-08 | UEA2713 | - | Jul 8, 10:20 UTC | Jul 9, 09:35 UTC | 23h 15m |
| 2026-07-08 | UEA1848 | - | Jul 8, 01:15 UTC | Jul 8, 01:25 UTC | 10m |
| 2026-07-05 | UEA2288 | - | Jul 5, 03:05 UTC | Jul 5, 07:10 UTC | 4h 5m |
| 2026-06-30 | UEA2303 | - | Jun 30, 06:35 UTC | Jun 30, 10:40 UTC | 4h 5m |
| 2026-06-22 | UEA1858 | - | Jun 22, 12:15 UTC | Jun 22, 12:25 UTC | 10m |
| 2026-06-17 | UEA2414 | HAK → TFU | Jun 17, 02:10 UTC | Jun 17, 04:35 UTC | 2h 25m |
| 2026-06-10 | UEA2787 | CSX → SYX | Jun 10, 00:50 UTC | Jun 10, 03:35 UTC | 2h 45m |
| 2026-05-29 | UEA2714 | SYX → HFE | May 29, 09:25 UTC | May 30, 06:40 UTC | 21h 15m |
| 2026-05-29 | UEA2713 | SHE → HFE | May 29, 02:05 UTC | May 29, 09:35 UTC | 7h 30m |
| 2026-05-28 | UEA2713 | SHE → HFE | May 28, 13:50 UTC | May 29, 09:35 UTC | 19h 45m |
| 2026-05-26 | UEA1844 | - | May 26, 13:40 UTC | May 26, 13:50 UTC | 10m |
| 2026-05-23 | UEA2264 | HGH → HAK | May 23, 06:30 UTC | May 23, 11:05 UTC | 4h 35m |
| 2026-05-17 | UEA2264 | HGH → HAK | May 17, 06:25 UTC | May 17, 06:50 UTC | 25m |
| 2026-04-17 | UEA2861 | TFU → CNX | Apr 17, 13:40 UTC | Apr 17, 13:55 UTC | 15m |
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-321Y page for operator, model, and routing details .