sensors Mode-S transponder
78099C
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-5720 · BOEING 737-800
- Hex
- 78099C
- Octal
- 36004634
- Decimal
- 7,866,780
- Country
- CN
- Tail
- B-5720
- Type
- B738
- Flights observed
- 37
- Distinct callsigns
- 10
- Country
- CN
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 78099C 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 10 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN6317 | - | 16 | 2026-07-18 |
| CSN6318 | - | 10 | 2026-07-16 |
| CSN3987 | China Southern Airlines | 3 | 2026-05-04 |
| CSN3988 | China Southern Airlines | 2 | 2026-05-04 |
| CSN6283 | China Southern Airlines | 1 | 2026-06-12 |
| CSN5676 | - | 1 | 2026-06-09 |
| CSN5104 | - | 1 | 2026-07-05 |
| CSN5103 | - | 1 | 2026-04-20 |
| CSN3292 | China Southern Airlines | 1 | 2026-05-13 |
| CSN3259 | - | 1 | 2026-07-12 |
Recent flights last 37
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-18 | CSN6317 | - | Jul 18, 04:45 UTC | Jul 18, 09:05 UTC | 4h 20m |
| 2026-07-16 | CSN6318 | - | Jul 16, 08:50 UTC | Jul 16, 09:05 UTC | 15m |
| 2026-07-16 | CSN6317 | - | Jul 16, 04:50 UTC | Jul 16, 05:10 UTC | 20m |
| 2026-07-15 | CSN6317 | - | Jul 15, 09:05 UTC | Jul 16, 05:10 UTC | 20h 5m |
| 2026-07-15 | CSN6317 | - | Jul 15, 08:50 UTC | Jul 16, 05:10 UTC | 20h 20m |
| 2026-07-15 | CSN6317 | - | Jul 15, 05:05 UTC | Jul 16, 05:00 UTC | 23h 55m |
| 2026-07-15 | CSN6317 | - | Jul 15, 04:45 UTC | Jul 15, 09:05 UTC | 4h 20m |
| 2026-07-14 | CSN6318 | - | Jul 14, 09:05 UTC | Jul 15, 09:00 UTC | 23h 54m |
| 2026-07-14 | CSN6318 | - | Jul 14, 05:05 UTC | Jul 15, 05:00 UTC | 23h 54m |
| 2026-07-14 | CSN6318 | - | Jul 14, 04:50 UTC | Jul 14, 09:25 UTC | 4h 35m |
| 2026-07-12 | CSN3259 | - | Jul 12, 10:45 UTC | Jul 12, 10:55 UTC | 10m |
| 2026-07-11 | CSN6318 | - | Jul 11, 04:45 UTC | Jul 11, 09:20 UTC | 4h 35m |
| 2026-07-10 | CSN6318 | - | Jul 10, 10:40 UTC | Jul 11, 09:00 UTC | 22h 20m |
| 2026-07-10 | CSN6317 | - | Jul 10, 07:05 UTC | Jul 11, 05:05 UTC | 22h 0m |
| 2026-07-10 | CSN6317 | - | Jul 10, 06:40 UTC | Jul 11, 05:01 UTC | 22h 21m |
| 2026-07-09 | CSN6318 | - | Jul 9, 09:05 UTC | Jul 9, 09:20 UTC | 15m |
| 2026-07-09 | CSN6317 | - | Jul 9, 04:50 UTC | Jul 9, 05:10 UTC | 20m |
| 2026-07-08 | CSN6318 | - | Jul 8, 09:10 UTC | Jul 9, 05:10 UTC | 20h 0m |
| 2026-07-08 | CSN6318 | - | Jul 8, 04:35 UTC | Jul 8, 09:30 UTC | 4h 55m |
| 2026-07-05 | CSN6317 | - | Jul 5, 15:05 UTC | Jul 6, 09:10 UTC | 18h 5m |
| 2026-07-05 | CSN5104 | - | Jul 5, 12:15 UTC | Jul 6, 09:10 UTC | 20h 55m |
| 2026-06-26 | CSN6317 | - | Jun 26, 04:39 UTC | Jun 26, 09:14 UTC | 4h 35m |
| 2026-06-22 | CSN6317 | - | Jun 22, 04:30 UTC | Jun 22, 09:14 UTC | 4h 45m |
| 2026-06-12 | CSN6283 | NNG → PKX | Jun 12, 10:20 UTC | Jun 12, 10:35 UTC | 15m |
| 2026-06-09 | CSN5676 | - | Jun 9, 22:35 UTC | Jun 9, 23:05 UTC | 30m |
| 2026-05-13 | CSN3292 | NNY → CAN | May 13, 02:05 UTC | May 13, 02:15 UTC | 10m |
| 2026-05-09 | CSN6317 | WUH → HRB | May 9, 04:55 UTC | May 9, 09:20 UTC | 4h 25m |
| 2026-05-07 | CSN6318 | HRB → WUH | May 7, 04:40 UTC | May 7, 09:05 UTC | 4h 25m |
| 2026-05-05 | CSN6317 | WUH → HRB | May 5, 04:45 UTC | May 5, 09:10 UTC | 4h 25m |
| 2026-05-04 | CSN3988 | CSX → SZX | May 4, 09:35 UTC | May 5, 09:00 UTC | 23h 26m |
| 2026-05-04 | CSN3987 | SZX → CSX | May 4, 05:15 UTC | May 5, 05:00 UTC | 23h 46m |
| 2026-04-30 | CSN6317 | WUH → HRB | Apr 30, 04:45 UTC | Apr 30, 09:05 UTC | 4h 20m |
| 2026-04-29 | CSN6317 | WUH → HRB | Apr 29, 09:50 UTC | Apr 30, 09:00 UTC | 23h 9m |
| 2026-04-29 | CSN3987 | SZX → CSX | Apr 29, 05:09 UTC | Apr 30, 05:00 UTC | 23h 50m |
| 2026-04-26 | CSN3988 | CSX → SZX | Apr 26, 05:25 UTC | Apr 26, 10:25 UTC | 5h 0m |
| 2026-04-20 | CSN5103 | - | Apr 20, 11:50 UTC | Apr 20, 15:10 UTC | 3h 20m |
| 2026-04-19 | CSN3987 | SZX → CSX | Apr 19, 05:50 UTC | Apr 19, 10:30 UTC | 4h 40m |
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-5720 page for operator, model, and routing details .