sensors Mode-S transponder
7823FD
ICAO 24-bit transponder address · allocated to China
- Hex
- 7823FD
- Octal
- 36021775
- Decimal
- 7,873,533
- Country
- CN
- Flights observed
- 66
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 20h ago
Last known position
Country allocation
The ICAO 24-bit address 7823FD 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 |
|---|---|---|---|
| CES721 | - | 18 | 2026-07-13 |
| CES722 | - | 11 | 2026-07-13 |
| CES5692 | - | 5 | 2026-06-19 |
| CES5164 | - | 5 | 2026-06-23 |
| CES5154 | - | 5 | 2026-06-25 |
| CES501 | - | 2 | 2026-06-29 |
| CES800 | China Eastern Airlines | 1 | 2026-05-27 |
| CES724 | - | 1 | 2026-06-18 |
| CES723 | - | 1 | 2026-06-17 |
| CES5549 | - | 1 | 2026-06-21 |
| CES5392 | - | 1 | 2026-06-30 |
| CES5391 | - | 1 | 2026-06-30 |
| CES5359 | - | 1 | 2026-06-30 |
| CES5352 | - | 1 | 2026-06-24 |
| CES5343 | - | 1 | 2026-06-24 |
| CES5342 | China Eastern Airlines | 1 | 2026-06-14 |
| CES5340 | - | 1 | 2026-06-13 |
| CES5333 | - | 1 | 2026-06-14 |
| CES5331 | China Eastern Airlines | 1 | 2026-06-13 |
| CES5240 | - | 1 | 2026-06-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | CES722 | - | Jul 13, 04:40 UTC | Jul 13, 06:05 UTC | 1h 25m |
| 2026-07-13 | CES721 | - | Jul 13, 01:55 UTC | Jul 13, 02:45 UTC | 50m |
| 2026-07-12 | CES722 | HKG → HKG | Jul 12, 06:01 UTC | Jul 13, 02:45 UTC | 20h 45m |
| 2026-07-12 | CES721 | - | Jul 12, 04:15 UTC | Jul 12, 04:35 UTC | 20m |
| 2026-07-11 | CES722 | - | Jul 11, 04:25 UTC | Jul 11, 04:50 UTC | 25m |
| 2026-07-11 | CES721 | - | Jul 11, 02:00 UTC | Jul 11, 02:35 UTC | 35m |
| 2026-07-10 | CES722 | - | Jul 10, 04:30 UTC | Jul 10, 05:30 UTC | 1h 0m |
| 2026-07-10 | CES721 | - | Jul 10, 01:35 UTC | Jul 10, 02:30 UTC | 55m |
| 2026-07-09 | CES721 | - | Jul 9, 05:20 UTC | Jul 10, 02:30 UTC | 21h 10m |
| 2026-07-09 | CES722 | HKG → HKG | Jul 9, 04:30 UTC | Jul 10, 02:30 UTC | 22h 0m |
| 2026-07-09 | CES721 | - | Jul 9, 02:00 UTC | Jul 9, 02:40 UTC | 40m |
| 2026-07-08 | CES721 | - | Jul 8, 05:20 UTC | Jul 9, 02:40 UTC | 21h 20m |
| 2026-07-08 | CES722 | HKG → HKG | Jul 8, 04:45 UTC | Jul 9, 02:40 UTC | 21h 55m |
| 2026-07-08 | CES721 | - | Jul 8, 01:55 UTC | Jul 8, 03:10 UTC | 1h 15m |
| 2026-07-07 | CES721 | - | Jul 7, 05:20 UTC | Jul 8, 03:10 UTC | 21h 50m |
| 2026-07-07 | CES722 | HKG → HKG | Jul 7, 04:50 UTC | Jul 8, 03:10 UTC | 22h 20m |
| 2026-07-07 | CES721 | - | Jul 7, 02:30 UTC | Jul 7, 03:05 UTC | 35m |
| 2026-07-07 | CES721 | - | Jul 7, 01:45 UTC | Jul 7, 01:55 UTC | 10m |
| 2026-07-06 | CES722 | - | Jul 6, 04:35 UTC | Jul 6, 06:05 UTC | 1h 30m |
| 2026-07-06 | CES721 | - | Jul 6, 01:25 UTC | Jul 6, 02:30 UTC | 1h 5m |
| 2026-07-05 | CES721 | - | Jul 5, 05:35 UTC | Jul 6, 02:30 UTC | 20h 55m |
| 2026-07-05 | CES721 | HKG → HKG | Jul 5, 04:15 UTC | Jul 6, 02:30 UTC | 22h 15m |
| 2026-07-05 | CES721 | - | Jul 5, 02:05 UTC | Jul 5, 02:20 UTC | 15m |
| 2026-07-04 | CES722 | - | Jul 4, 04:30 UTC | Jul 4, 05:40 UTC | 1h 10m |
| 2026-07-04 | CES721 | - | Jul 4, 02:05 UTC | Jul 4, 02:35 UTC | 30m |
| 2026-07-03 | CES722 | - | Jul 3, 05:10 UTC | Jul 3, 05:25 UTC | 15m |
| 2026-07-03 | CES721 | - | Jul 3, 02:25 UTC | Jul 3, 02:50 UTC | 25m |
| 2026-07-02 | CES722 | - | Jul 2, 04:30 UTC | Jul 2, 04:45 UTC | 15m |
| 2026-07-02 | CES721 | - | Jul 2, 02:05 UTC | Jul 2, 02:20 UTC | 15m |
| 2026-06-30 | CES5359 | - | Jun 30, 15:35 UTC | Jun 30, 15:55 UTC | 20m |
| 2026-06-30 | CES5392 | - | Jun 30, 08:05 UTC | Jun 30, 08:15 UTC | 10m |
| 2026-06-30 | CES5391 | - | Jun 30, 05:50 UTC | Jun 30, 06:10 UTC | 20m |
| 2026-06-29 | CES502 | - | Jun 29, 05:24 UTC | Jun 29, 05:40 UTC | 15m |
| 2026-06-29 | CES501 | - | Jun 29, 01:55 UTC | Jun 29, 03:05 UTC | 1h 10m |
| 2026-06-27 | CES272 | - | Jun 27, 02:25 UTC | Jun 27, 04:05 UTC | 1h 40m |
| 2026-06-26 | CES271 | - | Jun 26, 05:05 UTC | Jun 26, 11:55 UTC | 6h 50m |
| 2026-06-26 | CES501 | - | Jun 26, 01:54 UTC | Jun 26, 03:15 UTC | 1h 20m |
| 2026-06-25 | CES5240 | - | Jun 25, 12:40 UTC | Jun 25, 12:54 UTC | 15m |
| 2026-06-25 | CES5154 | - | Jun 25, 03:44 UTC | Jun 25, 03:54 UTC | 10m |
| 2026-06-24 | CES5352 | - | Jun 24, 11:29 UTC | Jun 24, 11:39 UTC | 10m |
| 2026-06-24 | CES5343 | - | Jun 24, 09:39 UTC | Jun 24, 09:49 UTC | 10m |
| 2026-06-24 | CES5154 | - | Jun 24, 04:20 UTC | Jun 24, 04:30 UTC | 10m |
| 2026-06-23 | CES5164 | - | Jun 23, 11:49 UTC | Jun 23, 11:59 UTC | 10m |
| 2026-06-22 | CES5164 | - | Jun 22, 13:05 UTC | Jun 22, 13:14 UTC | 10m |
| 2026-06-21 | CES5549 | - | Jun 21, 03:44 UTC | Jun 21, 11:59 UTC | 8h 15m |
| 2026-06-20 | CES5158 | PEK → PVG | Jun 20, 07:04 UTC | Jun 20, 07:14 UTC | 10m |
| 2026-06-19 | CES5100 | PEK → PVG | Jun 19, 23:14 UTC | Jun 19, 23:29 UTC | 15m |
| 2026-06-19 | CES5692 | - | Jun 19, 05:59 UTC | Jun 19, 06:44 UTC | 45m |
| 2026-06-18 | CES724 | - | Jun 18, 02:05 UTC | Jun 18, 03:20 UTC | 1h 15m |
| 2026-06-17 | CES723 | ICN → HKG | Jun 17, 07:30 UTC | Jun 17, 12:50 UTC | 5h 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.