sensors Mode-S transponder
781DC5
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-329X · AIRBUS A-320
- Hex
- 781DC5
- Octal
- 36016705
- Decimal
- 7,871,941
- Country
- CN
- Tail
- B-329X
- Type
- A320
- Flights observed
- 19
- Distinct callsigns
- 14
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 781DC5 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 14 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UEA2288 | - | 4 | 2026-07-12 |
| UEA2713 | - | 2 | 2026-06-29 |
| UEA2254 | - | 2 | 2026-06-30 |
| UEA2868 | United Eagle Airlines | 1 | 2026-05-09 |
| UEA2867 | United Eagle Airlines | 1 | 2026-05-09 |
| UEA2720 | - | 1 | 2026-06-15 |
| UEA2714 | - | 1 | 2026-06-29 |
| UEA2253 | - | 1 | 2026-06-30 |
| UEA2209 | - | 1 | 2026-06-27 |
| UEA1920 | United Eagle Airlines | 1 | 2026-07-05 |
| UEA1847 | - | 1 | 2026-05-17 |
| UEA1844 | - | 1 | 2026-06-13 |
| UEA1823 | - | 1 | 2026-06-25 |
| UEA1821 | - | 1 | 2026-05-23 |
Recent flights last 19
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-12 | UEA2288 | - | Jul 12, 03:01 UTC | Jul 12, 06:50 UTC | 3h 50m |
| 2026-07-11 | UEA2288 | - | Jul 11, 07:25 UTC | Jul 12, 06:50 UTC | 23h 25m |
| 2026-07-11 | UEA2288 | - | Jul 11, 06:40 UTC | Jul 12, 03:01 UTC | 20h 20m |
| 2026-07-11 | UEA2288 | - | Jul 11, 03:05 UTC | Jul 11, 07:25 UTC | 4h 20m |
| 2026-07-05 | UEA1920 | TAO → HET | Jul 5, 05:10 UTC | Jul 5, 05:25 UTC | 15m |
| 2026-06-30 | UEA2254 | - | Jun 30, 07:05 UTC | Jun 30, 07:25 UTC | 20m |
| 2026-06-30 | UEA2254 | - | Jun 30, 04:50 UTC | Jun 30, 05:10 UTC | 20m |
| 2026-06-30 | UEA2253 | - | Jun 30, 03:05 UTC | Jun 30, 03:25 UTC | 20m |
| 2026-06-29 | UEA2714 | - | Jun 29, 05:45 UTC | Jun 30, 00:49 UTC | 19h 5m |
| 2026-06-29 | UEA2713 | - | Jun 29, 01:34 UTC | Jun 30, 00:49 UTC | 23h 15m |
| 2026-06-28 | UEA2713 | - | Jun 28, 14:04 UTC | Jun 29, 09:34 UTC | 19h 30m |
| 2026-06-27 | UEA2209 | - | Jun 27, 15:19 UTC | Jun 28, 14:14 UTC | 22h 55m |
| 2026-06-25 | UEA1823 | - | Jun 25, 02:59 UTC | Jun 25, 12:50 UTC | 9h 50m |
| 2026-06-15 | UEA2720 | - | Jun 15, 14:00 UTC | Jun 15, 14:10 UTC | 10m |
| 2026-06-13 | UEA1844 | - | Jun 13, 13:40 UTC | Jun 13, 13:50 UTC | 10m |
| 2026-05-23 | UEA1821 | - | May 23, 13:05 UTC | May 23, 14:55 UTC | 1h 50m |
| 2026-05-17 | UEA1847 | - | May 17, 09:25 UTC | May 17, 09:35 UTC | 10m |
| 2026-05-09 | UEA2868 | BKK → TFU | May 9, 14:40 UTC | May 9, 15:40 UTC | 1h 0m |
| 2026-05-09 | UEA2867 | TFU → BKK | May 9, 12:15 UTC | May 9, 13:15 UTC | 1h 0m |
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-329X page for operator, model, and routing details .