sensors Mode-S transponder
781DE9
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32AD · AIRBUS A-320neo
- Hex
- 781DE9
- Octal
- 36016751
- Decimal
- 7,871,977
- Country
- CN
- Tail
- B-32AD
- Type
- A20N
- Flights observed
- 42
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 781DE9 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 |
|---|---|---|---|
| CES2034 | - | 6 | 2026-07-12 |
| CES2033 | - | 6 | 2026-07-12 |
| CES2040 | - | 4 | 2026-07-09 |
| CES2039 | - | 4 | 2026-07-09 |
| CES6903 | - | 3 | 2026-07-11 |
| CES858 | China Eastern Airlines | 2 | 2026-05-26 |
| CES857 | China Eastern Airlines | 2 | 2026-05-26 |
| CES5197 | - | 2 | 2026-06-26 |
| CES2400 | - | 2 | 2026-06-22 |
| CES874 | China Eastern Airlines | 1 | 2026-05-13 |
| CES873 | China Eastern Airlines | 1 | 2026-05-13 |
| CES869 | China Eastern Airlines | 1 | 2026-04-30 |
| CES854 | - | 1 | 2026-07-15 |
| CES853 | - | 1 | 2026-07-15 |
| CES6956 | China Eastern Airlines | 1 | 2026-05-15 |
| CES6356 | - | 1 | 2026-07-06 |
| CES5245 | - | 1 | 2026-07-02 |
| CES2417 | - | 1 | 2026-06-23 |
| CES2342 | China Eastern Airlines | 1 | 2026-05-15 |
| CES2183 | China Eastern Airlines | 1 | 2026-05-08 |
Recent flights last 42
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-15 | CES854 | - | Jul 15, 11:05 UTC | Jul 15, 11:30 UTC | 25m |
| 2026-07-15 | CES853 | - | Jul 15, 08:55 UTC | Jul 15, 09:20 UTC | 25m |
| 2026-07-12 | CES2034 | - | Jul 12, 05:01 UTC | Jul 12, 05:25 UTC | 25m |
| 2026-07-12 | CES2033 | - | Jul 12, 03:20 UTC | Jul 12, 03:40 UTC | 20m |
| 2026-07-11 | CES6903 | - | Jul 11, 00:35 UTC | Jul 11, 11:45 UTC | 11h 10m |
| 2026-07-09 | CES2040 | - | Jul 9, 03:15 UTC | Jul 9, 15:25 UTC | 12h 10m |
| 2026-07-09 | CES2039 | - | Jul 9, 01:05 UTC | Jul 9, 01:35 UTC | 30m |
| 2026-07-06 | CES6356 | - | Jul 6, 09:45 UTC | Jul 6, 13:05 UTC | 3h 20m |
| 2026-07-05 | CES2034 | - | Jul 5, 04:55 UTC | Jul 5, 05:20 UTC | 25m |
| 2026-07-05 | CES2033 | - | Jul 5, 03:00 UTC | Jul 5, 03:25 UTC | 25m |
| 2026-07-04 | CES2034 | - | Jul 4, 04:45 UTC | Jul 4, 05:00 UTC | 15m |
| 2026-07-04 | CES2033 | - | Jul 4, 03:10 UTC | Jul 4, 03:30 UTC | 20m |
| 2026-07-02 | CES5245 | - | Jul 2, 13:10 UTC | Jul 2, 15:55 UTC | 2h 45m |
| 2026-06-26 | CES5197 | - | Jun 26, 00:05 UTC | Jun 26, 00:24 UTC | 20m |
| 2026-06-25 | CES5197 | - | Jun 25, 00:19 UTC | Jun 25, 00:35 UTC | 15m |
| 2026-06-23 | CES2417 | - | Jun 23, 12:49 UTC | Jun 23, 13:00 UTC | 10m |
| 2026-06-22 | CES2400 | - | Jun 22, 10:34 UTC | Jun 22, 10:49 UTC | 15m |
| 2026-06-11 | CES6903 | PVG → KWL | Jun 11, 00:45 UTC | Jun 11, 01:10 UTC | 25m |
| 2026-06-10 | CES6903 | PVG → KWL | Jun 10, 00:55 UTC | Jun 10, 01:25 UTC | 30m |
| 2026-06-03 | CES2040 | ICN → TAO | Jun 3, 03:15 UTC | Jun 3, 03:25 UTC | 10m |
| 2026-06-03 | CES2039 | TAO → ICN | Jun 3, 01:15 UTC | Jun 3, 01:40 UTC | 25m |
| 2026-05-27 | CES2400 | - | May 27, 08:40 UTC | May 27, 10:55 UTC | 2h 15m |
| 2026-05-26 | CES858 | KUL → KMG | May 26, 20:09 UTC | May 26, 20:24 UTC | 15m |
| 2026-05-26 | CES857 | KMG → KUL | May 26, 18:24 UTC | May 26, 18:40 UTC | 15m |
| 2026-05-23 | CES858 | KUL → KMG | May 23, 20:30 UTC | May 23, 20:45 UTC | 15m |
| 2026-05-23 | CES857 | KMG → KUL | May 23, 18:40 UTC | May 23, 18:55 UTC | 15m |
| 2026-05-21 | CES2034 | ICN → TAO | May 21, 05:00 UTC | May 21, 05:30 UTC | 30m |
| 2026-05-21 | CES2033 | TAO → ICN | May 21, 03:00 UTC | May 21, 03:30 UTC | 30m |
| 2026-05-15 | CES6956 | XIY → CAN | May 15, 17:20 UTC | May 15, 17:35 UTC | 15m |
| 2026-05-15 | CES2342 | ZUH → XIY | May 15, 02:25 UTC | May 15, 02:35 UTC | 10m |
| 2026-05-13 | CES874 | KUL → KMG | May 13, 08:30 UTC | May 13, 08:45 UTC | 15m |
| 2026-05-13 | CES873 | KMG → KUL | May 13, 06:10 UTC | May 13, 06:45 UTC | 35m |
| 2026-05-08 | CES2183 | XIY → SHE | May 8, 23:40 UTC | May 9, 00:05 UTC | 25m |
| 2026-04-30 | CES869 | HGH → SGN | Apr 30, 16:35 UTC | Apr 30, 23:15 UTC | 6h 40m |
| 2026-04-26 | CES2034 | ICN → TAO | Apr 26, 04:40 UTC | Apr 26, 04:50 UTC | 10m |
| 2026-04-26 | CES2033 | TAO → ICN | Apr 26, 02:55 UTC | Apr 26, 03:15 UTC | 20m |
| 2026-04-23 | CES2034 | ICN → TAO | Apr 23, 04:55 UTC | Apr 23, 05:05 UTC | 10m |
| 2026-04-23 | CES2033 | TAO → ICN | Apr 23, 03:05 UTC | Apr 23, 03:35 UTC | 30m |
| 2026-04-22 | CES2040 | ICN → TAO | Apr 22, 03:25 UTC | Apr 22, 03:55 UTC | 30m |
| 2026-04-22 | CES2039 | TAO → ICN | Apr 22, 01:10 UTC | Apr 22, 01:35 UTC | 25m |
| 2026-04-15 | CES2040 | ICN → TAO | Apr 15, 03:10 UTC | Apr 15, 03:20 UTC | 10m |
| 2026-04-15 | CES2039 | TAO → ICN | Apr 15, 01:25 UTC | Apr 15, 01:40 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-32AD page for operator, model, and routing details .