sensors Mode-S transponder
781059
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1538 · BOEING 737-800
- Hex
- 781059
- Octal
- 36010131
- Decimal
- 7,868,505
- Country
- CN
- Tail
- B-1538
- Type
- B738
- Flights observed
- 47
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 5h ago
Last known position
Country allocation
The ICAO 24-bit address 781059 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 |
|---|---|---|---|
| CHH7074 | Hainan Airlines | 3 | 2026-04-25 |
| CHH7725 | Hainan Airlines | 2 | 2026-05-11 |
| CHH7319 | Hainan Airlines | 2 | 2026-05-07 |
| CHH7216 | Hainan Airlines | 2 | 2026-05-07 |
| CHH720 | Hainan Airlines | 2 | 2026-05-17 |
| CHH719 | Hainan Airlines | 2 | 2026-05-17 |
| CHH7067 | Hainan Airlines | 2 | 2026-05-04 |
| CHH7872 | Hainan Airlines | 1 | 2026-04-21 |
| CHH7811 | Hainan Airlines | 1 | 2026-05-21 |
| CHH7807 | Hainan Airlines | 1 | 2026-05-26 |
| CHH780 | Hainan Airlines | 1 | 2026-05-05 |
| CHH779 | Hainan Airlines | 1 | 2026-05-05 |
| CHH7776 | - | 1 | 2026-05-27 |
| CHH7752 | Hainan Airlines | 1 | 2026-04-29 |
| CHH7751 | Hainan Airlines | 1 | 2026-04-28 |
| CHH7746 | - | 1 | 2026-04-28 |
| CHH7745 | - | 1 | 2026-04-28 |
| CHH7741 | Hainan Airlines | 1 | 2026-04-17 |
| CHH7726 | Hainan Airlines | 1 | 2026-05-11 |
| CHH7721 | Hainan Airlines | 1 | 2026-05-09 |
Recent flights last 47
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CHH7419 | LNL → LHW | May 29, 23:15 UTC | May 29, 23:25 UTC | 10m |
| 2026-05-28 | CHH7026 | SZX → HAK | May 28, 12:35 UTC | May 28, 12:45 UTC | 10m |
| 2026-05-28 | CHH7375 | SZX → TFU | May 28, 05:20 UTC | May 28, 05:35 UTC | 15m |
| 2026-05-27 | CHH7776 | - | May 27, 16:45 UTC | May 27, 17:00 UTC | 15m |
| 2026-05-26 | CHH7807 | PEK → CAN | May 26, 04:45 UTC | May 26, 05:00 UTC | 15m |
| 2026-05-25 | CHH7193 | - | May 25, 12:10 UTC | May 25, 12:20 UTC | 10m |
| 2026-05-23 | CHH7164 | NKG → SZX | May 23, 05:05 UTC | May 23, 08:30 UTC | 3h 25m |
| 2026-05-21 | CHH7811 | PEK → CAN | May 21, 08:50 UTC | May 21, 09:05 UTC | 15m |
| 2026-05-21 | CHH7248 | TFU → PEK | May 21, 06:50 UTC | May 21, 07:00 UTC | 10m |
| 2026-05-21 | CHH7147 | PEK → TFU | May 21, 00:10 UTC | May 21, 00:25 UTC | 15m |
| 2026-05-20 | CHH7290 | KWE → PEK | May 20, 14:35 UTC | May 20, 14:45 UTC | 10m |
| 2026-05-17 | CHH720 | HKG → HAK | May 17, 08:10 UTC | May 17, 08:25 UTC | 15m |
| 2026-05-17 | CHH719 | HAK → HKG | May 17, 06:30 UTC | May 17, 06:35 UTC | 5m |
| 2026-05-17 | CHH706 | HKG → HAK | May 17, 02:40 UTC | May 17, 02:55 UTC | 15m |
| 2026-05-17 | CHH705 | HAK → HKG | May 17, 00:30 UTC | May 17, 00:40 UTC | 10m |
| 2026-05-11 | CHH7725 | SZX → PVG | May 11, 04:50 UTC | May 11, 05:00 UTC | 10m |
| 2026-05-11 | CHH7726 | PVG → SZX | May 11, 01:30 UTC | May 11, 01:50 UTC | 20m |
| 2026-05-09 | CHH7721 | SZX → PVG | May 9, 01:40 UTC | May 9, 01:50 UTC | 10m |
| 2026-05-08 | CHH7320 | PVG → HAK | May 8, 02:29 UTC | May 8, 13:35 UTC | 11h 5m |
| 2026-05-07 | CHH7319 | HAK → PVG | May 7, 12:50 UTC | May 8, 07:34 UTC | 18h 45m |
| 2026-05-07 | CHH7216 | NKG → HAK | May 7, 09:20 UTC | May 7, 09:30 UTC | 10m |
| 2026-05-05 | CHH780 | HKG → HAK | May 5, 13:00 UTC | May 5, 13:15 UTC | 15m |
| 2026-05-05 | CHH779 | HAK → HKG | May 5, 11:00 UTC | May 5, 11:05 UTC | 5m |
| 2026-05-04 | CHH7067 | HAK → WUH | May 4, 14:50 UTC | May 5, 02:40 UTC | 11h 51m |
| 2026-05-04 | CHH7068 | HRB → WUH | May 4, 02:25 UTC | May 4, 15:05 UTC | 12h 40m |
| 2026-05-02 | CHH7067 | HAK → WUH | May 2, 00:35 UTC | May 2, 14:20 UTC | 13h 45m |
| 2026-04-30 | CHH720 | HKG → HAK | Apr 30, 08:15 UTC | Apr 30, 08:25 UTC | 10m |
| 2026-04-30 | CHH719 | HAK → HKG | Apr 30, 06:20 UTC | Apr 30, 06:25 UTC | 5m |
| 2026-04-30 | CHH7054 | HGH → HAK | Apr 30, 02:50 UTC | Apr 30, 03:10 UTC | 20m |
| 2026-04-29 | CHH7275 | SZX → TFU | Apr 29, 09:20 UTC | Apr 29, 09:30 UTC | 10m |
| 2026-04-29 | CHH7752 | CTU → SZX | Apr 29, 05:45 UTC | Apr 29, 05:55 UTC | 10m |
| 2026-04-28 | CHH7751 | SZX → CTU | Apr 28, 23:20 UTC | Apr 28, 23:29 UTC | 10m |
| 2026-04-28 | CHH7746 | - | Apr 28, 08:50 UTC | Apr 28, 09:15 UTC | 25m |
| 2026-04-28 | CHH7745 | - | Apr 28, 02:35 UTC | Apr 28, 02:45 UTC | 10m |
| 2026-04-25 | CHH7319 | HAK → PVG | Apr 25, 12:35 UTC | Apr 26, 02:35 UTC | 14h 0m |
| 2026-04-25 | CHH7074 | HRB → HAK | Apr 25, 07:15 UTC | Apr 26, 02:35 UTC | 19h 20m |
| 2026-04-25 | CHH7074 | HRB → HAK | Apr 25, 03:10 UTC | Apr 25, 12:45 UTC | 9h 35m |
| 2026-04-24 | CHH7074 | HRB → HAK | Apr 24, 15:35 UTC | Apr 25, 12:45 UTC | 21h 10m |
| 2026-04-24 | CHH7219 | HAK → PVG | Apr 24, 10:20 UTC | Apr 25, 07:40 UTC | 21h 20m |
| 2026-04-23 | CHH7012 | CAN → HAK | Apr 23, 15:00 UTC | Apr 23, 15:10 UTC | 10m |
| 2026-04-21 | CHH7872 | SZX → XIY | Apr 21, 05:15 UTC | Apr 21, 05:25 UTC | 10m |
| 2026-04-20 | CHH7512 | ZUH → XIY | Apr 20, 04:00 UTC | Apr 20, 04:10 UTC | 10m |
| 2026-04-19 | CHH7725 | SZX → PVG | Apr 19, 05:00 UTC | Apr 19, 05:10 UTC | 10m |
| 2026-04-17 | CHH7741 | SZX → KWE | Apr 17, 04:40 UTC | Apr 17, 04:55 UTC | 15m |
| 2026-04-16 | CHH7698 | NKG → SYX | Apr 16, 05:20 UTC | Apr 16, 05:39 UTC | 20m |
| 2026-04-14 | CHH7654 | - | Apr 14, 15:25 UTC | Apr 14, 16:25 UTC | 1h 0m |
| 2026-04-14 | CHH7216 | NKG → HAK | Apr 14, 09:30 UTC | Apr 14, 09:45 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-1538 page for operator, model, and routing details .