sensors Mode-S transponder
7823F6
ICAO 24-bit transponder address · allocated to China
- Hex
- 7823F6
- Octal
- 36021766
- Decimal
- 7,873,526
- Country
- CN
- Flights observed
- 101
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 10h ago
Last known position
Country allocation
The ICAO 24-bit address 7823F6 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 |
|---|---|---|---|
| CHH7939 | - | 11 | 2026-07-01 |
| CHH7940 | - | 8 | 2026-07-01 |
| CHH721 | - | 8 | 2026-06-30 |
| CHH722 | - | 7 | 2026-06-30 |
| CHH7579 | - | 5 | 2026-07-15 |
| CHH6053 | - | 5 | 2026-07-07 |
| CHH7384 | - | 4 | 2026-07-09 |
| CHH7135 | Hainan Airlines | 4 | 2026-06-09 |
| CHH7383 | Hainan Airlines | 3 | 2026-07-17 |
| CHH7304 | - | 3 | 2026-07-04 |
| CHH6054 | - | 3 | 2026-07-10 |
| CHH7687 | - | 2 | 2026-06-16 |
| CHH7204 | Hainan Airlines | 2 | 2026-06-07 |
| CHH7116 | - | 2 | 2026-06-27 |
| CHH7087 | Hainan Airlines | 2 | 2026-06-14 |
| CHH7038 | Hainan Airlines | 2 | 2026-06-15 |
| CHH7812 | Hainan Airlines | 1 | 2026-06-02 |
| CHH7811 | Hainan Airlines | 1 | 2026-06-03 |
| CHH7810 | - | 1 | 2026-07-15 |
| CHH7803 | - | 1 | 2026-07-15 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | CHH7383 | SYX → HGH | Jul 17, 10:15 UTC | Jul 17, 14:44 UTC | 4h 30m |
| 2026-07-15 | CHH7579 | - | Jul 15, 13:40 UTC | Jul 15, 16:35 UTC | 2h 55m |
| 2026-07-15 | CHH7810 | - | Jul 15, 10:05 UTC | Jul 15, 10:15 UTC | 10m |
| 2026-07-15 | CHH7803 | - | Jul 15, 01:45 UTC | Jul 15, 02:05 UTC | 20m |
| 2026-07-13 | CHH7579 | - | Jul 13, 13:35 UTC | Jul 14, 09:00 UTC | 19h 25m |
| 2026-07-12 | CHH7383 | - | Jul 12, 09:50 UTC | Jul 13, 06:15 UTC | 20h 25m |
| 2026-07-10 | CHH6054 | - | Jul 10, 14:30 UTC | Jul 11, 06:55 UTC | 16h 25m |
| 2026-07-09 | CHH7384 | - | Jul 9, 09:50 UTC | Jul 9, 14:55 UTC | 5h 5m |
| 2026-07-08 | CHH6054 | - | Jul 8, 14:20 UTC | Jul 9, 10:10 UTC | 19h 50m |
| 2026-07-08 | CHH6054 | - | Jul 8, 00:55 UTC | Jul 8, 14:45 UTC | 13h 50m |
| 2026-07-07 | CHH6053 | - | Jul 7, 14:15 UTC | Jul 8, 10:05 UTC | 19h 50m |
| 2026-07-07 | CHH6053 | - | Jul 7, 10:05 UTC | Jul 8, 07:00 UTC | 20h 55m |
| 2026-07-07 | CHH6053 | - | Jul 7, 06:50 UTC | Jul 8, 00:55 UTC | 18h 5m |
| 2026-07-06 | CHH6053 | - | Jul 6, 16:35 UTC | Jul 7, 14:40 UTC | 22h 5m |
| 2026-07-06 | CHH7579 | - | Jul 6, 13:35 UTC | Jul 7, 10:20 UTC | 20h 45m |
| 2026-07-05 | CHH7384 | - | Jul 5, 15:10 UTC | Jul 6, 09:20 UTC | 18h 10m |
| 2026-07-05 | CHH7384 | - | Jul 5, 10:35 UTC | Jul 6, 09:20 UTC | 22h 45m |
| 2026-07-05 | CHH7384 | - | Jul 5, 07:50 UTC | Jul 5, 15:25 UTC | 7h 35m |
| 2026-07-04 | CHH7383 | - | Jul 4, 14:10 UTC | Jul 5, 10:45 UTC | 20h 35m |
| 2026-07-04 | CHH6053 | - | Jul 4, 10:05 UTC | Jul 5, 07:50 UTC | 21h 45m |
| 2026-07-04 | CHH7304 | - | Jul 4, 05:35 UTC | Jul 4, 14:10 UTC | 8h 35m |
| 2026-07-03 | CHH7304 | - | Jul 3, 09:40 UTC | Jul 4, 05:50 UTC | 20h 10m |
| 2026-07-03 | CHH7304 | - | Jul 3, 01:05 UTC | Jul 3, 09:50 UTC | 8h 45m |
| 2026-07-02 | CHH7579 | - | Jul 2, 13:15 UTC | Jul 2, 16:25 UTC | 3h 10m |
| 2026-07-02 | CHH7280 | - | Jul 2, 11:35 UTC | Jul 2, 11:50 UTC | 15m |
| 2026-07-02 | CHH7303 | - | Jul 2, 01:10 UTC | Jul 2, 08:45 UTC | 7h 35m |
| 2026-07-01 | CHH7579 | - | Jul 1, 13:15 UTC | Jul 1, 16:20 UTC | 3h 5m |
| 2026-07-01 | CHH7940 | - | Jul 1, 04:15 UTC | Jul 1, 04:35 UTC | 20m |
| 2026-07-01 | CHH7939 | - | Jul 1, 01:15 UTC | Jul 1, 03:00 UTC | 1h 45m |
| 2026-06-30 | CHH722 | - | Jun 30, 12:30 UTC | Jun 30, 12:55 UTC | 25m |
| 2026-06-30 | CHH721 | - | Jun 30, 04:20 UTC | Jun 30, 11:10 UTC | 6h 50m |
| 2026-06-29 | CHH7939 | - | Jun 29, 08:54 UTC | Jun 30, 02:35 UTC | 17h 41m |
| 2026-06-29 | CHH7940 | - | Jun 29, 04:20 UTC | Jun 29, 04:50 UTC | 30m |
| 2026-06-29 | CHH7939 | - | Jun 29, 01:00 UTC | Jun 29, 02:25 UTC | 1h 25m |
| 2026-06-28 | CHH722 | - | Jun 28, 12:39 UTC | Jun 28, 14:04 UTC | 1h 25m |
| 2026-06-28 | CHH721 | - | Jun 28, 08:59 UTC | Jun 28, 10:55 UTC | 1h 55m |
| 2026-06-28 | CHH7940 | - | Jun 28, 04:15 UTC | Jun 28, 04:44 UTC | 30m |
| 2026-06-28 | CHH7939 | - | Jun 28, 00:45 UTC | Jun 28, 02:20 UTC | 1h 35m |
| 2026-06-27 | CHH7116 | - | Jun 27, 01:49 UTC | Jun 27, 15:14 UTC | 13h 25m |
| 2026-06-26 | CHH7116 | - | Jun 26, 14:15 UTC | Jun 27, 09:24 UTC | 19h 10m |
| 2026-06-26 | CHH722 | - | Jun 26, 12:55 UTC | Jun 27, 09:24 UTC | 20h 30m |
| 2026-06-26 | CHH721 | - | Jun 26, 09:20 UTC | Jun 26, 11:24 UTC | 2h 5m |
| 2026-06-26 | CHH7940 | - | Jun 26, 04:30 UTC | Jun 26, 04:55 UTC | 25m |
| 2026-06-26 | CHH7939 | - | Jun 26, 00:55 UTC | Jun 26, 02:40 UTC | 1h 45m |
| 2026-06-25 | CHH722 | - | Jun 25, 13:14 UTC | Jun 25, 13:59 UTC | 45m |
| 2026-06-25 | CHH721 | - | Jun 25, 09:14 UTC | Jun 25, 11:19 UTC | 2h 5m |
| 2026-06-25 | CHH7940 | - | Jun 25, 04:20 UTC | Jun 25, 04:49 UTC | 30m |
| 2026-06-25 | CHH7939 | - | Jun 25, 00:59 UTC | Jun 25, 02:39 UTC | 1h 40m |
| 2026-06-24 | CHH7940 | - | Jun 24, 04:20 UTC | Jun 24, 14:00 UTC | 9h 40m |
| 2026-06-23 | CHH7939 | - | Jun 23, 12:35 UTC | Jun 24, 02:49 UTC | 14h 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.