sensors Mode-S transponder
7823D8
ICAO 24-bit transponder address · allocated to China
- Hex
- 7823D8
- Octal
- 36021730
- Decimal
- 7,873,496
- Country
- CN
- Flights observed
- 38
- Distinct callsigns
- 19
- Country
- CN
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 7823D8 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 19 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CES2793 | China Eastern Airlines | 5 | 2026-07-24 |
| CES2951 | - | 3 | 2026-06-26 |
| CES2938 | - | 3 | 2026-07-07 |
| CES2672 | China Eastern Airlines | 3 | 2026-07-22 |
| CES765 | China Eastern Airlines | 2 | 2026-06-11 |
| CES2952 | - | 2 | 2026-06-21 |
| CES2937 | - | 2 | 2026-07-07 |
| CES2893 | - | 2 | 2026-06-27 |
| CES2878 | China Eastern Airlines | 2 | 2026-07-23 |
| CES2877 | China Eastern Airlines | 2 | 2026-07-23 |
| CES2712 | - | 2 | 2026-06-22 |
| CES2662 | - | 2 | 2026-06-23 |
| CES766 | China Eastern Airlines | 1 | 2026-06-12 |
| CES2917 | China Eastern Airlines | 1 | 2026-07-09 |
| CES2894 | - | 1 | 2026-06-18 |
| CES2794 | China Eastern Airlines | 1 | 2026-07-20 |
| CES2727 | China Eastern Airlines | 1 | 2026-05-31 |
| CES2711 | - | 1 | 2026-06-25 |
| CES2661 | - | 1 | 2026-06-19 |
Recent flights last 38
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | CES2793 | NKG → ZHA | Jul 24, 07:45 UTC | Jul 24, 08:05 UTC | 20m |
| 2026-07-23 | CES2878 | SZX → NKG | Jul 23, 15:45 UTC | Jul 23, 15:55 UTC | 10m |
| 2026-07-23 | CES2877 | NKG → SZX | Jul 23, 14:10 UTC | Jul 23, 14:30 UTC | 20m |
| 2026-07-22 | CES2672 | CSX → WUX | Jul 22, 03:35 UTC | Jul 22, 03:55 UTC | 20m |
| 2026-07-20 | CES2794 | ZHA → NKG | Jul 20, 09:55 UTC | Jul 20, 10:10 UTC | 15m |
| 2026-07-20 | CES2793 | - | Jul 20, 07:40 UTC | Jul 20, 07:55 UTC | 15m |
| 2026-07-18 | CES2672 | - | Jul 18, 03:25 UTC | Jul 18, 03:50 UTC | 25m |
| 2026-07-16 | CES2793 | - | Jul 16, 06:50 UTC | Jul 16, 10:15 UTC | 3h 25m |
| 2026-07-14 | CES2793 | - | Jul 14, 07:05 UTC | Jul 14, 09:45 UTC | 2h 40m |
| 2026-07-09 | CES2917 | WUX → CAN | Jul 9, 09:25 UTC | Jul 9, 09:40 UTC | 15m |
| 2026-07-07 | CES2938 | - | Jul 7, 16:45 UTC | Jul 7, 16:55 UTC | 10m |
| 2026-07-07 | CES2938 | - | Jul 7, 16:00 UTC | Jul 7, 16:10 UTC | 10m |
| 2026-07-07 | CES2937 | - | Jul 7, 11:55 UTC | Jul 7, 12:20 UTC | 25m |
| 2026-07-02 | CES2938 | - | Jul 2, 14:00 UTC | Jul 2, 14:10 UTC | 10m |
| 2026-07-02 | CES2937 | - | Jul 2, 12:00 UTC | Jul 2, 12:25 UTC | 25m |
| 2026-06-27 | CES2893 | - | Jun 27, 02:04 UTC | Jun 27, 02:35 UTC | 30m |
| 2026-06-26 | CES2951 | - | Jun 26, 08:50 UTC | Jun 26, 09:05 UTC | 15m |
| 2026-06-25 | CES2711 | - | Jun 25, 12:25 UTC | Jun 25, 12:40 UTC | 15m |
| 2026-06-24 | CES2951 | - | Jun 24, 04:59 UTC | Jun 24, 05:15 UTC | 15m |
| 2026-06-23 | CES2662 | - | Jun 23, 13:00 UTC | Jun 23, 13:09 UTC | 10m |
| 2026-06-23 | - | - | Jun 23, 10:55 UTC | Jun 23, 11:14 UTC | 20m |
| 2026-06-23 | CES2893 | - | Jun 23, 02:04 UTC | Jun 23, 05:54 UTC | 3h 50m |
| 2026-06-22 | CES2712 | - | Jun 22, 00:10 UTC | Jun 22, 00:20 UTC | 10m |
| 2026-06-21 | CES2952 | - | Jun 21, 16:04 UTC | Jun 21, 16:25 UTC | 20m |
| 2026-06-20 | CES2672 | - | Jun 20, 03:34 UTC | Jun 20, 03:59 UTC | 25m |
| 2026-06-19 | CES2951 | - | Jun 19, 05:19 UTC | Jun 19, 05:40 UTC | 20m |
| 2026-06-19 | CES2661 | - | Jun 19, 03:34 UTC | Jun 19, 03:55 UTC | 20m |
| 2026-06-18 | CES2662 | - | Jun 18, 14:30 UTC | Jun 18, 14:55 UTC | 25m |
| 2026-06-18 | CES2894 | - | Jun 18, 02:45 UTC | Jun 18, 06:20 UTC | 3h 35m |
| 2026-06-17 | CES2878 | SZX → NKG | Jun 17, 16:35 UTC | Jun 17, 16:50 UTC | 15m |
| 2026-06-17 | CES2877 | - | Jun 17, 14:30 UTC | Jun 17, 14:50 UTC | 20m |
| 2026-06-12 | CES766 | HKG → NKG | Jun 12, 04:05 UTC | Jun 12, 04:55 UTC | 50m |
| 2026-06-11 | CES765 | NKG → HKG | Jun 11, 08:55 UTC | Jun 12, 02:15 UTC | 17h 20m |
| 2026-06-11 | CES765 | NKG → HKG | Jun 11, 06:40 UTC | Jun 12, 02:15 UTC | 19h 36m |
| 2026-06-07 | CES2793 | NKG → ZHA | Jun 7, 06:15 UTC | Jun 7, 06:30 UTC | 15m |
| 2026-06-06 | CES2712 | ZUH → NKG | Jun 6, 00:20 UTC | Jun 6, 00:30 UTC | 10m |
| 2026-06-05 | CES2952 | ZUH → NKG | Jun 5, 16:50 UTC | Jun 5, 17:00 UTC | 10m |
| 2026-05-31 | CES2727 | NKG → SYX | May 31, 09:10 UTC | May 31, 12:45 UTC | 3h 35m |
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.