sensors Mode-S transponder
780D12
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1728 · BOEING 737-800
- Hex
- 780D12
- Octal
- 36006422
- Decimal
- 7,867,666
- Country
- CN
- Tail
- B-1728
- Type
- B738
- Flights observed
- 40
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 11h ago
Last known position
Country allocation
The ICAO 24-bit address 780D12 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 |
|---|---|---|---|
| CHH7116 | Hainan Airlines | 5 | 2026-05-27 |
| CHH7078 | Hainan Airlines | 3 | 2026-05-25 |
| CHH7077 | Hainan Airlines | 3 | 2026-05-26 |
| CHH7016 | Hainan Airlines | 3 | 2026-04-20 |
| CHH720 | Hainan Airlines | 2 | 2026-06-02 |
| CHH719 | Hainan Airlines | 2 | 2026-06-02 |
| CHH7015 | Hainan Airlines | 2 | 2026-04-16 |
| CHH7815 | Hainan Airlines | 1 | 2026-05-09 |
| CHH7698 | Hainan Airlines | 1 | 2026-04-23 |
| CHH7672 | - | 1 | 2026-05-01 |
| CHH7671 | - | 1 | 2026-05-01 |
| CHH7654 | Hainan Airlines | 1 | 2026-05-17 |
| CHH7653 | Hainan Airlines | 1 | 2026-05-17 |
| CHH7647 | Hainan Airlines | 1 | 2026-04-26 |
| CHH7547 | Hainan Airlines | 1 | 2026-05-04 |
| CHH7328 | Hainan Airlines | 1 | 2026-05-08 |
| CHH7320 | Hainan Airlines | 1 | 2026-05-27 |
| CHH7265 | Hainan Airlines | 1 | 2026-05-30 |
| CHH7236 | Hainan Airlines | 1 | 2026-05-04 |
| CHH7235 | Hainan Airlines | 1 | 2026-05-04 |
Recent flights last 40
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | CHH720 | HKG → HAK | Jun 2, 08:25 UTC | Jun 2, 08:40 UTC | 15m |
| 2026-06-02 | CHH719 | HAK → HKG | Jun 2, 06:15 UTC | Jun 2, 06:35 UTC | 20m |
| 2026-06-01 | CHH7040 | KWE → HAK | Jun 1, 11:10 UTC | Jun 1, 11:20 UTC | 10m |
| 2026-05-31 | CHH7120 | PVG → HAK | May 31, 10:05 UTC | May 31, 10:20 UTC | 15m |
| 2026-05-30 | CHH7265 | HAK → XIY | May 30, 05:25 UTC | May 30, 05:35 UTC | 10m |
| 2026-05-29 | CHH720 | HKG → HAK | May 29, 08:10 UTC | May 29, 08:25 UTC | 15m |
| 2026-05-29 | CHH719 | HAK → HKG | May 29, 06:25 UTC | May 29, 06:40 UTC | 15m |
| 2026-05-29 | CHH706 | HKG → HAK | May 29, 02:15 UTC | May 29, 02:30 UTC | 15m |
| 2026-05-29 | CHH705 | HAK → HKG | May 29, 00:25 UTC | May 29, 00:45 UTC | 20m |
| 2026-05-27 | CHH7320 | PVG → HAK | May 27, 12:40 UTC | May 28, 04:05 UTC | 15h 25m |
| 2026-05-27 | CHH7116 | NKG → HAK | May 27, 06:55 UTC | May 28, 04:05 UTC | 21h 10m |
| 2026-05-27 | CHH7116 | NKG → HAK | May 27, 01:44 UTC | May 27, 13:20 UTC | 11h 36m |
| 2026-05-26 | CHH7116 | NKG → HAK | May 26, 10:34 UTC | May 27, 07:10 UTC | 20h 35m |
| 2026-05-26 | CHH7077 | HAK → KHN | May 26, 06:34 UTC | May 27, 01:54 UTC | 19h 20m |
| 2026-05-26 | CHH7077 | HAK → KHN | May 26, 03:35 UTC | May 27, 01:54 UTC | 22h 20m |
| 2026-05-25 | CHH7077 | HAK → KHN | May 25, 12:35 UTC | May 26, 10:34 UTC | 22h 0m |
| 2026-05-25 | CHH7078 | KHN → HAK | May 25, 09:45 UTC | May 26, 06:49 UTC | 21h 4m |
| 2026-05-25 | CHH7078 | KHN → HAK | May 25, 06:50 UTC | May 26, 03:45 UTC | 20h 54m |
| 2026-05-25 | CHH7078 | KHN → HAK | May 25, 03:45 UTC | May 25, 12:45 UTC | 9h 0m |
| 2026-05-17 | CHH7654 | JUH → TYN | May 17, 14:45 UTC | May 17, 15:35 UTC | 50m |
| 2026-05-17 | CHH7653 | TYN → KWE | May 17, 12:20 UTC | May 17, 12:35 UTC | 15m |
| 2026-05-09 | CHH7815 | PEK → CAN | May 9, 12:45 UTC | May 9, 12:55 UTC | 10m |
| 2026-05-08 | CHH7328 | CTU → SZX | May 8, 00:54 UTC | May 8, 15:10 UTC | 14h 15m |
| 2026-05-04 | CHH7547 | PEK → TFU | May 4, 12:25 UTC | May 4, 12:40 UTC | 15m |
| 2026-05-04 | CHH7236 | CSX → PEK | May 4, 09:35 UTC | May 4, 09:45 UTC | 10m |
| 2026-05-04 | CHH7235 | CAN → CGO | May 4, 03:00 UTC | May 4, 03:15 UTC | 15m |
| 2026-05-01 | CHH7672 | - | May 1, 15:05 UTC | May 1, 15:25 UTC | 20m |
| 2026-05-01 | CHH7671 | - | May 1, 07:00 UTC | May 1, 07:25 UTC | 25m |
| 2026-04-28 | CHH7216 | NKG → HAK | Apr 28, 04:25 UTC | Apr 28, 15:45 UTC | 11h 20m |
| 2026-04-26 | CHH7647 | HAK → SHE | Apr 26, 08:00 UTC | Apr 26, 11:15 UTC | 3h 15m |
| 2026-04-25 | CHH7116 | NKG → HAK | Apr 25, 02:10 UTC | Apr 25, 07:15 UTC | 5h 5m |
| 2026-04-24 | CHH7116 | NKG → HAK | Apr 24, 12:20 UTC | Apr 25, 07:15 UTC | 18h 55m |
| 2026-04-23 | CHH7698 | NKG → SYX | Apr 23, 05:10 UTC | Apr 23, 05:35 UTC | 25m |
| 2026-04-21 | CHH7069 | HAK → KHN | Apr 21, 12:10 UTC | Apr 21, 15:40 UTC | 3h 30m |
| 2026-04-20 | CHH7016 | SZX → HAK | Apr 20, 08:45 UTC | Apr 20, 09:05 UTC | 20m |
| 2026-04-18 | CHH7016 | SZX → HAK | Apr 18, 08:30 UTC | Apr 18, 12:00 UTC | 3h 30m |
| 2026-04-16 | CHH7015 | HAK → SZX | Apr 16, 11:35 UTC | Apr 16, 11:54 UTC | 20m |
| 2026-04-16 | CHH7016 | SZX → HAK | Apr 16, 08:50 UTC | Apr 16, 09:05 UTC | 15m |
| 2026-04-15 | CHH7015 | HAK → SZX | Apr 15, 13:10 UTC | Apr 15, 13:30 UTC | 20m |
| 2026-04-14 | CHH7056 | HGH → HAK | Apr 14, 13:40 UTC | Apr 14, 13:55 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-1728 page for operator, model, and routing details .