sensors Mode-S transponder
781872
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-20E6 · BOEING 737-800
- Hex
- 781872
- Octal
- 36014162
- Decimal
- 7,870,578
- Country
- CN
- Tail
- B-20E6
- Type
- B738
- Flights observed
- 61
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address 781872 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 |
|---|---|---|---|
| CHH7312 | Hainan Airlines | 10 | 2026-06-01 |
| CHH7750 | Hainan Airlines | 6 | 2026-06-02 |
| CHH7743 | Hainan Airlines | 6 | 2026-06-01 |
| CHH7749 | Hainan Airlines | 4 | 2026-06-01 |
| CHH7374 | Hainan Airlines | 4 | 2026-05-11 |
| CHH7744 | Hainan Airlines | 3 | 2026-05-21 |
| CHH7045 | Hainan Airlines | 3 | 2026-05-29 |
| CHH7765 | Hainan Airlines | 2 | 2026-05-17 |
| CHH7668 | Hainan Airlines | 2 | 2026-05-03 |
| CHH7026 | Hainan Airlines | 2 | 2026-05-18 |
| CHH6034 | Hainan Airlines | 2 | 2026-05-31 |
| CHH6033 | Hainan Airlines | 2 | 2026-05-31 |
| CHH7764 | Hainan Airlines | 1 | 2026-04-24 |
| CHH7763 | Hainan Airlines | 1 | 2026-04-16 |
| CHH7654 | Hainan Airlines | 1 | 2026-05-24 |
| CHH7653 | Hainan Airlines | 1 | 2026-05-24 |
| CHH7528 | Hainan Airlines | 1 | 2026-05-01 |
| CHH7325 | Hainan Airlines | 1 | 2026-05-30 |
| CHH7311 | Hainan Airlines | 1 | 2026-04-20 |
| CHH7216 | Hainan Airlines | 1 | 2026-05-20 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | CHH7750 | SZX → SYX | Jun 2, 15:15 UTC | Jun 2, 15:25 UTC | 10m |
| 2026-06-01 | CHH7743 | NGB → CGQ | Jun 1, 23:05 UTC | Jun 1, 23:15 UTC | 10m |
| 2026-06-01 | CHH7749 | SYX → SZX | Jun 1, 16:10 UTC | Jun 1, 16:25 UTC | 15m |
| 2026-06-01 | CHH7312 | KHN → SYX | Jun 1, 01:25 UTC | Jun 1, 12:20 UTC | 10h 55m |
| 2026-05-31 | CHH6034 | FOC → ZUH | May 31, 13:20 UTC | May 31, 13:45 UTC | 25m |
| 2026-05-31 | CHH6033 | ZUH → FOC | May 31, 10:10 UTC | May 31, 10:45 UTC | 35m |
| 2026-05-30 | CHH7325 | SYX → WMT | May 30, 00:45 UTC | May 30, 05:55 UTC | 5h 10m |
| 2026-05-29 | CHH6032 | ZUH → SYX | May 29, 15:20 UTC | May 29, 15:25 UTC | 5m |
| 2026-05-29 | CHH7045 | ZUH → TYN | May 29, 05:30 UTC | May 29, 05:40 UTC | 10m |
| 2026-05-28 | CHH7075 | HAK → KHN | May 28, 00:30 UTC | May 28, 10:30 UTC | 10h 0m |
| 2026-05-27 | CHH7045 | ZUH → TYN | May 27, 05:24 UTC | May 27, 05:40 UTC | 15m |
| 2026-05-25 | CHH7045 | ZUH → TYN | May 25, 06:05 UTC | May 25, 06:15 UTC | 10m |
| 2026-05-24 | CHH7654 | JUH → TYN | May 24, 14:40 UTC | May 24, 15:35 UTC | 55m |
| 2026-05-24 | CHH7653 | TYN → KWE | May 24, 01:50 UTC | May 24, 12:35 UTC | 10h 45m |
| 2026-05-22 | CHH7028 | SZX → HAK | May 22, 16:00 UTC | May 22, 16:15 UTC | 15m |
| 2026-05-22 | CHH7743 | NGB → CGQ | May 22, 00:00 UTC | May 22, 00:10 UTC | 10m |
| 2026-05-21 | CHH7744 | SZX → LIY | May 21, 18:10 UTC | May 21, 18:25 UTC | 15m |
| 2026-05-21 | CHH7743 | NGB → CGQ | May 21, 01:55 UTC | May 21, 02:05 UTC | 10m |
| 2026-05-20 | CHH7216 | NKG → HAK | May 20, 09:30 UTC | May 20, 09:50 UTC | 20m |
| 2026-05-18 | CHH7026 | SZX → HAK | May 18, 13:40 UTC | May 18, 13:55 UTC | 15m |
| 2026-05-17 | CHH7765 | SZX → FUG | May 17, 23:05 UTC | May 17, 23:20 UTC | 15m |
| 2026-05-16 | CHH7743 | NGB → CGQ | May 16, 23:55 UTC | May 17, 00:05 UTC | 10m |
| 2026-05-16 | CHH7312 | KHN → SYX | May 16, 01:35 UTC | May 16, 11:55 UTC | 10h 21m |
| 2026-05-13 | CHH7312 | KHN → SYX | May 13, 01:35 UTC | May 13, 14:51 UTC | 13h 15m |
| 2026-05-12 | CHH6034 | FOC → ZUH | May 12, 13:45 UTC | May 12, 14:10 UTC | 25m |
| 2026-05-12 | CHH6033 | ZUH → FOC | May 12, 10:00 UTC | May 12, 10:15 UTC | 15m |
| 2026-05-11 | CHH7374 | HFE → SYX | May 11, 02:00 UTC | May 11, 13:55 UTC | 11h 55m |
| 2026-05-10 | CHH7374 | HFE → SYX | May 10, 13:40 UTC | May 11, 02:10 UTC | 12h 30m |
| 2026-05-08 | CHH7750 | SZX → SYX | May 8, 15:30 UTC | May 8, 15:40 UTC | 10m |
| 2026-05-07 | CHH7749 | SYX → SZX | May 7, 16:10 UTC | May 7, 16:25 UTC | 15m |
| 2026-05-07 | CHH7312 | KHN → SYX | May 7, 01:40 UTC | May 7, 13:10 UTC | 11h 30m |
| 2026-05-06 | CHH7750 | SZX → SYX | May 6, 15:15 UTC | May 6, 15:35 UTC | 20m |
| 2026-05-05 | CHH7743 | NGB → CGQ | May 5, 23:45 UTC | May 5, 23:55 UTC | 10m |
| 2026-05-05 | CHH7312 | KHN → SYX | May 5, 01:40 UTC | May 5, 11:55 UTC | 10h 15m |
| 2026-05-03 | CHH7668 | NGB → SZX | May 3, 08:55 UTC | May 4, 00:15 UTC | 15h 20m |
| 2026-05-02 | CHH7668 | NGB → SZX | May 2, 15:15 UTC | May 3, 09:20 UTC | 18h 4m |
| 2026-05-02 | CHH7744 | SZX → LIY | May 2, 12:30 UTC | May 2, 13:00 UTC | 30m |
| 2026-05-01 | CHH7743 | NGB → CGQ | May 1, 23:05 UTC | May 1, 23:15 UTC | 10m |
| 2026-05-01 | CHH7528 | HRB → SYX | May 1, 05:40 UTC | May 1, 10:20 UTC | 4h 40m |
| 2026-04-26 | CHH7312 | KHN → SYX | Apr 26, 01:35 UTC | Apr 26, 12:00 UTC | 10h 25m |
| 2026-04-25 | CHH7374 | HFE → SYX | Apr 25, 13:30 UTC | Apr 26, 12:00 UTC | 22h 30m |
| 2026-04-25 | CHH7374 | HFE → SYX | Apr 25, 02:00 UTC | Apr 25, 13:50 UTC | 11h 50m |
| 2026-04-24 | CHH7750 | SZX → SYX | Apr 24, 15:20 UTC | Apr 24, 15:30 UTC | 10m |
| 2026-04-24 | CHH7764 | NKG → SZX | Apr 24, 08:00 UTC | Apr 24, 08:30 UTC | 30m |
| 2026-04-23 | CHH7312 | KHN → SYX | Apr 23, 02:00 UTC | Apr 23, 13:05 UTC | 11h 5m |
| 2026-04-22 | CHH7750 | SZX → SYX | Apr 22, 15:20 UTC | Apr 23, 13:05 UTC | 21h 45m |
| 2026-04-22 | CHH7744 | SZX → LIY | Apr 22, 12:50 UTC | Apr 22, 13:20 UTC | 30m |
| 2026-04-21 | CHH7749 | SYX → SZX | Apr 21, 16:01 UTC | Apr 21, 16:20 UTC | 20m |
| 2026-04-21 | CHH7312 | KHN → SYX | Apr 21, 01:30 UTC | Apr 21, 12:25 UTC | 10h 55m |
| 2026-04-20 | CHH7312 | KHN → SYX | Apr 20, 15:30 UTC | Apr 21, 12:25 UTC | 20h 55m |
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-20E6 page for operator, model, and routing details .