sensors Mode-S transponder
7823E9
ICAO 24-bit transponder address · allocated to China
- Hex
- 7823E9
- Octal
- 36021751
- Decimal
- 7,873,513
- Country
- CN
- Flights observed
- 29
- Distinct callsigns
- 13
- Country
- CN
- Last broadcast
- 10d ago
Last known position
Country allocation
The ICAO 24-bit address 7823E9 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 13 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CCA414 | - | 12 | 2026-07-17 |
| CCA413 | Air China | 5 | 2026-07-19 |
| CCA4116 | Air China | 2 | 2026-07-23 |
| CCA4324 | - | 1 | 2026-06-26 |
| CCA4311 | - | 1 | 2026-06-25 |
| CCA4298 | Air China | 1 | 2026-06-23 |
| CCA4297 | Air China | 1 | 2026-06-23 |
| CCA4182 | Air China | 1 | 2026-06-23 |
| CCA4181 | Air China | 1 | 2026-07-26 |
| CCA4112 | Air China | 1 | 2026-07-26 |
| CCA4111 | Air China | 1 | 2026-07-26 |
| CCA2742 | Air China | 1 | 2026-06-05 |
| CCA2721 | - | 1 | 2026-06-30 |
Recent flights last 29
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CCA4181 | CTU → PEK | Jul 26, 12:25 UTC | Jul 26, 12:35 UTC | 10m |
| 2026-07-26 | CCA4112 | TFU → LXA | Jul 26, 06:30 UTC | Jul 26, 06:50 UTC | 21m |
| 2026-07-26 | CCA4111 | CTU → PEK | Jul 26, 03:35 UTC | Jul 26, 03:55 UTC | 20m |
| 2026-07-23 | CCA4116 | PEK → CTU | Jul 23, 07:35 UTC | Jul 23, 07:50 UTC | 15m |
| 2026-07-19 | CCA413 | TFU → HKT | Jul 19, 03:10 UTC | Jul 19, 09:25 UTC | 6h 15m |
| 2026-07-17 | CCA414 | - | Jul 17, 03:05 UTC | Jul 17, 09:15 UTC | 6h 10m |
| 2026-07-15 | CCA413 | - | Jul 15, 03:20 UTC | Jul 15, 09:20 UTC | 6h 0m |
| 2026-07-13 | CCA413 | - | Jul 13, 03:05 UTC | Jul 13, 09:20 UTC | 6h 15m |
| 2026-07-11 | CCA413 | - | Jul 11, 03:15 UTC | Jul 11, 08:25 UTC | 5h 10m |
| 2026-07-09 | CCA414 | - | Jul 9, 03:10 UTC | Jul 9, 09:15 UTC | 6h 5m |
| 2026-07-07 | CCA414 | - | Jul 7, 03:10 UTC | Jul 7, 09:35 UTC | 6h 25m |
| 2026-07-04 | CCA413 | - | Jul 4, 03:25 UTC | Jul 4, 09:20 UTC | 5h 55m |
| 2026-07-01 | CCA414 | - | Jul 1, 13:45 UTC | Jul 2, 09:30 UTC | 19h 45m |
| 2026-07-01 | CCA414 | - | Jul 1, 10:30 UTC | Jul 2, 09:30 UTC | 23h 0m |
| 2026-06-30 | CCA2721 | - | Jun 30, 07:05 UTC | Jun 30, 07:25 UTC | 20m |
| 2026-06-29 | CCA414 | - | Jun 29, 08:19 UTC | Jun 30, 07:25 UTC | 23h 5m |
| 2026-06-29 | CCA414 | - | Jun 29, 03:25 UTC | Jun 29, 09:25 UTC | 6h 0m |
| 2026-06-26 | CCA4324 | - | Jun 26, 14:19 UTC | Jun 26, 15:10 UTC | 50m |
| 2026-06-25 | CCA4311 | - | Jun 25, 11:15 UTC | Jun 25, 11:25 UTC | 10m |
| 2026-06-24 | CCA4116 | - | Jun 24, 07:24 UTC | Jun 24, 07:44 UTC | 20m |
| 2026-06-23 | CCA4182 | PEK → CTU | Jun 23, 23:14 UTC | Jun 23, 23:34 UTC | 20m |
| 2026-06-23 | CCA4298 | HAK → CTU | Jun 23, 06:59 UTC | Jun 23, 07:09 UTC | 10m |
| 2026-06-23 | CCA4297 | CTU → HAK | Jun 23, 04:05 UTC | Jun 23, 04:25 UTC | 20m |
| 2026-06-22 | CCA414 | - | Jun 22, 07:45 UTC | Jun 23, 04:25 UTC | 20h 40m |
| 2026-06-22 | CCA414 | - | Jun 22, 04:19 UTC | Jun 23, 04:14 UTC | 23h 55m |
| 2026-06-20 | CCA414 | - | Jun 20, 04:09 UTC | Jun 20, 08:49 UTC | 4h 40m |
| 2026-06-18 | CCA414 | - | Jun 18, 04:15 UTC | Jun 18, 08:50 UTC | 4h 35m |
| 2026-06-09 | CCA414 | HKT → TFU | Jun 9, 04:15 UTC | Jun 9, 09:05 UTC | 4h 50m |
| 2026-06-05 | CCA2742 | SHE → TFU | Jun 5, 01:35 UTC | Jun 5, 05:30 UTC | 3h 55m |
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.