sensors Mode-S transponder
781CD8
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-327M · AIRBUS A-321neo
- Hex
- 781CD8
- Octal
- 36016330
- Decimal
- 7,871,704
- Country
- CN
- Tail
- B-327M
- Type
- A21N
- Flights observed
- 96
- Distinct callsigns
- 11
- Country
- CN
- Last broadcast
- 9d ago
Last known position
Country allocation
The ICAO 24-bit address 781CD8 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 11 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| QDA917 | - | 27 | 2026-06-30 |
| QDA918 | - | 26 | 2026-06-30 |
| QDA908 | - | 13 | 2026-07-09 |
| QDA907 | - | 10 | 2026-07-09 |
| QDA930 | - | 7 | 2026-05-20 |
| QDA929 | - | 6 | 2026-05-20 |
| QDA923 | Qingdao Airlines | 2 | 2026-04-18 |
| QDA9841 | - | 1 | 2026-04-24 |
| QDA9793 | - | 1 | 2026-07-05 |
| QDA924 | Qingdao Airlines | 1 | 2026-04-25 |
| QDA6054 | Qingdao Airlines | 1 | 2026-04-30 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-09 | QDA908 | - | Jul 9, 09:20 UTC | Jul 9, 13:25 UTC | 4h 5m |
| 2026-07-09 | QDA907 | - | Jul 9, 04:25 UTC | Jul 9, 08:05 UTC | 3h 40m |
| 2026-07-05 | QDA9793 | - | Jul 5, 11:20 UTC | Jul 6, 00:10 UTC | 12h 50m |
| 2026-06-30 | QDA918 | - | Jun 30, 11:35 UTC | Jun 30, 13:25 UTC | 1h 50m |
| 2026-06-30 | QDA917 | - | Jun 30, 08:25 UTC | Jun 30, 10:05 UTC | 1h 40m |
| 2026-06-28 | QDA908 | - | Jun 28, 08:29 UTC | Jun 28, 13:00 UTC | 4h 30m |
| 2026-06-28 | QDA907 | - | Jun 28, 06:44 UTC | Jun 28, 07:14 UTC | 30m |
| 2026-06-27 | QDA908 | - | Jun 27, 10:05 UTC | Jun 28, 04:05 UTC | 18h 0m |
| 2026-06-27 | QDA908 | - | Jun 27, 09:40 UTC | Jun 28, 04:05 UTC | 18h 25m |
| 2026-06-27 | QDA907 | - | Jun 27, 07:59 UTC | Jun 27, 08:20 UTC | 20m |
| 2026-06-26 | QDA918 | - | Jun 26, 13:49 UTC | Jun 27, 05:10 UTC | 15h 20m |
| 2026-06-26 | QDA917 | - | Jun 26, 11:09 UTC | Jun 26, 11:40 UTC | 30m |
| 2026-06-26 | QDA917 | - | Jun 26, 09:55 UTC | Jun 26, 10:30 UTC | 35m |
| 2026-06-21 | QDA918 | - | Jun 21, 11:40 UTC | Jun 21, 13:29 UTC | 1h 50m |
| 2026-06-21 | QDA917 | - | Jun 21, 08:20 UTC | Jun 21, 10:09 UTC | 1h 50m |
| 2026-06-19 | QDA918 | - | Jun 19, 12:29 UTC | Jun 19, 14:19 UTC | 1h 50m |
| 2026-06-19 | QDA917 | - | Jun 19, 08:14 UTC | Jun 19, 09:55 UTC | 1h 40m |
| 2026-06-16 | QDA918 | - | Jun 16, 12:25 UTC | Jun 16, 14:20 UTC | 1h 55m |
| 2026-06-16 | QDA917 | - | Jun 16, 10:25 UTC | Jun 16, 10:49 UTC | 25m |
| 2026-06-16 | QDA917 | - | Jun 16, 09:10 UTC | Jun 16, 09:45 UTC | 35m |
| 2026-06-14 | QDA918 | - | Jun 14, 11:25 UTC | Jun 14, 13:05 UTC | 1h 40m |
| 2026-06-14 | QDA917 | - | Jun 14, 08:15 UTC | Jun 14, 10:00 UTC | 1h 45m |
| 2026-06-12 | QDA918 | BKK → TAO | Jun 12, 11:40 UTC | Jun 12, 13:25 UTC | 1h 45m |
| 2026-06-12 | QDA917 | TAO → BKK | Jun 12, 08:20 UTC | Jun 12, 10:15 UTC | 1h 55m |
| 2026-06-10 | QDA908 | KUL → TAO | Jun 10, 09:05 UTC | Jun 10, 12:50 UTC | 3h 45m |
| 2026-06-09 | QDA918 | BKK → TAO | Jun 9, 12:05 UTC | Jun 10, 07:25 UTC | 19h 20m |
| 2026-06-09 | QDA918 | BKK → TAO | Jun 9, 11:40 UTC | Jun 10, 07:25 UTC | 19h 45m |
| 2026-06-09 | QDA917 | TAO → BKK | Jun 9, 08:25 UTC | Jun 9, 10:10 UTC | 1h 45m |
| 2026-06-07 | QDA918 | BKK → TAO | Jun 7, 11:40 UTC | Jun 7, 13:25 UTC | 1h 45m |
| 2026-06-07 | QDA917 | TAO → BKK | Jun 7, 08:30 UTC | Jun 7, 10:05 UTC | 1h 35m |
| 2026-06-05 | QDA918 | BKK → TAO | Jun 5, 11:45 UTC | Jun 5, 13:25 UTC | 1h 40m |
| 2026-06-05 | QDA917 | TAO → BKK | Jun 5, 08:25 UTC | Jun 5, 10:15 UTC | 1h 50m |
| 2026-06-02 | QDA918 | BKK → TAO | Jun 2, 11:40 UTC | Jun 2, 13:30 UTC | 1h 50m |
| 2026-06-02 | QDA917 | TAO → BKK | Jun 2, 08:15 UTC | Jun 2, 10:10 UTC | 1h 55m |
| 2026-05-31 | QDA918 | BKK → TAO | May 31, 11:25 UTC | May 31, 13:10 UTC | 1h 45m |
| 2026-05-31 | QDA917 | TAO → BKK | May 31, 08:25 UTC | May 31, 10:00 UTC | 1h 35m |
| 2026-05-29 | QDA918 | BKK → TAO | May 29, 11:45 UTC | May 29, 13:35 UTC | 1h 50m |
| 2026-05-29 | QDA917 | TAO → BKK | May 29, 08:20 UTC | May 29, 10:10 UTC | 1h 50m |
| 2026-05-27 | QDA908 | KUL → TAO | May 27, 09:00 UTC | May 27, 13:05 UTC | 4h 5m |
| 2026-05-27 | QDA907 | TAO → KUL | May 27, 06:44 UTC | May 27, 07:10 UTC | 25m |
| 2026-05-26 | QDA918 | BKK → TAO | May 26, 11:34 UTC | May 26, 12:30 UTC | 55m |
| 2026-05-26 | QDA917 | TAO → BKK | May 26, 09:09 UTC | May 26, 10:05 UTC | 55m |
| 2026-05-24 | QDA918 | BKK → TAO | May 24, 11:50 UTC | May 24, 12:45 UTC | 55m |
| 2026-05-24 | QDA917 | TAO → BKK | May 24, 08:50 UTC | May 24, 09:50 UTC | 1h 0m |
| 2026-05-22 | QDA908 | KUL → TAO | May 22, 08:45 UTC | May 22, 12:50 UTC | 4h 5m |
| 2026-05-21 | QDA907 | TAO → KUL | May 21, 12:20 UTC | May 22, 07:10 UTC | 18h 50m |
| 2026-05-21 | QDA907 | TAO → KUL | May 21, 11:30 UTC | May 22, 07:10 UTC | 19h 40m |
| 2026-05-21 | QDA908 | KUL → TAO | May 21, 08:15 UTC | May 22, 07:10 UTC | 22h 55m |
| 2026-05-20 | QDA930 | - | May 20, 17:20 UTC | May 21, 06:50 UTC | 13h 30m |
| 2026-05-20 | QDA929 | - | May 20, 15:25 UTC | May 20, 15:45 UTC | 20m |
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-327M page for operator, model, and routing details .