sensors Mode-S transponder
78105F
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1545 · BOEING 737-800
- Hex
- 78105F
- Octal
- 36010137
- Decimal
- 7,868,511
- Country
- CN
- Tail
- B-1545
- Type
- B738
- Flights observed
- 26
- Distinct callsigns
- 10
- Country
- CN
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 78105F 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 |
|---|---|---|---|
| KNA8286 | - | 4 | 2026-07-20 |
| KNA8274 | Knight Air | 4 | 2026-06-04 |
| KNA8282 | - | 3 | 2026-06-22 |
| KNA8280 | - | 3 | 2026-06-26 |
| KNA8278 | - | 3 | 2026-07-11 |
| KNA8242 | Knight Air | 3 | 2026-07-24 |
| KNA8249 | Knight Air | 2 | 2026-06-27 |
| KNA3031 | - | 2 | 2026-05-01 |
| KNA8277 | - | 1 | 2026-06-18 |
| KNA8241 | Knight Air | 1 | 2026-07-24 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | KNA8242 | SHE → KMG | Jul 24, 08:10 UTC | Jul 24, 08:45 UTC | 35m |
| 2026-07-24 | KNA8241 | KMG → SHE | Jul 24, 05:10 UTC | Jul 24, 05:25 UTC | 15m |
| 2026-07-21 | KNA8242 | - | Jul 21, 08:00 UTC | Jul 21, 08:10 UTC | 10m |
| 2026-07-20 | KNA8286 | - | Jul 20, 14:40 UTC | Jul 20, 15:00 UTC | 20m |
| 2026-07-17 | KNA8242 | - | Jul 17, 08:04 UTC | Jul 17, 08:15 UTC | 10m |
| 2026-07-11 | KNA8278 | - | Jul 11, 04:05 UTC | Jul 11, 04:15 UTC | 10m |
| 2026-06-30 | KNA8286 | - | Jun 30, 15:45 UTC | Jun 30, 16:00 UTC | 15m |
| 2026-06-30 | KNA8286 | - | Jun 30, 14:55 UTC | Jun 30, 15:05 UTC | 10m |
| 2026-06-27 | KNA8249 | KHN → HRB | Jun 27, 13:24 UTC | Jun 28, 01:34 UTC | 12h 10m |
| 2026-06-26 | KNA8280 | - | Jun 26, 18:04 UTC | Jun 27, 13:40 UTC | 19h 35m |
| 2026-06-22 | KNA8282 | - | Jun 22, 04:44 UTC | Jun 22, 04:54 UTC | 10m |
| 2026-06-19 | KNA8249 | KHN → HRB | Jun 19, 13:39 UTC | Jun 20, 01:55 UTC | 12h 15m |
| 2026-06-18 | KNA8278 | - | Jun 18, 06:15 UTC | Jun 18, 06:35 UTC | 20m |
| 2026-06-18 | KNA8278 | - | Jun 18, 05:30 UTC | Jun 18, 05:40 UTC | 10m |
| 2026-06-18 | KNA8277 | - | Jun 18, 00:55 UTC | Jun 18, 01:05 UTC | 10m |
| 2026-06-09 | KNA8280 | CAN → KMG | Jun 9, 15:25 UTC | Jun 9, 15:35 UTC | 10m |
| 2026-06-06 | KNA8280 | CAN → KMG | Jun 6, 18:04 UTC | Jun 6, 18:19 UTC | 15m |
| 2026-06-04 | KNA8274 | HUZ → KMG | Jun 4, 03:45 UTC | Jun 4, 08:45 UTC | 5h 0m |
| 2026-06-04 | KNA8274 | HUZ → KMG | Jun 4, 03:00 UTC | Jun 4, 03:10 UTC | 10m |
| 2026-05-11 | KNA8282 | CAN → KMG | May 11, 04:05 UTC | May 11, 04:15 UTC | 10m |
| 2026-05-01 | KNA3031 | - | May 1, 02:00 UTC | May 1, 02:10 UTC | 10m |
| 2026-04-30 | KNA8274 | HUZ → KMG | Apr 30, 03:00 UTC | Apr 30, 03:20 UTC | 20m |
| 2026-04-29 | KNA8274 | HUZ → KMG | Apr 29, 02:45 UTC | Apr 29, 03:04 UTC | 20m |
| 2026-04-26 | KNA8286 | HUZ → KMG | Apr 26, 16:05 UTC | Apr 26, 16:25 UTC | 20m |
| 2026-04-25 | KNA3031 | - | Apr 25, 01:55 UTC | Apr 25, 02:05 UTC | 10m |
| 2026-04-22 | KNA8282 | CAN → KMG | Apr 22, 03:40 UTC | Apr 22, 03:55 UTC | 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.
Prefer a tail-number view? See the B-1545 page for operator, model, and routing details .