sensors Mode-S transponder
780B1A
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-5797 · BOEING 737-800
- Hex
- 780B1A
- Octal
- 36005432
- Decimal
- 7,867,162
- Country
- CN
- Tail
- B-5797
- Type
- B738
- Flights observed
- 67
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address 780B1A 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 |
|---|---|---|---|
| CHH7726 | Hainan Airlines | 4 | 2026-07-24 |
| CHH7741 | Hainan Airlines | 3 | 2026-07-24 |
| CHH7468 | Hainan Airlines | 3 | 2026-05-10 |
| CHH7467 | Hainan Airlines | 3 | 2026-04-28 |
| CHH7384 | - | 3 | 2026-07-14 |
| CHH7698 | - | 2 | 2026-07-14 |
| CHH7674 | - | 2 | 2026-06-25 |
| CHH7673 | - | 2 | 2026-06-25 |
| CHH7648 | Hainan Airlines | 2 | 2026-05-20 |
| CHH7374 | Hainan Airlines | 2 | 2026-06-04 |
| CHH7247 | Hainan Airlines | 2 | 2026-07-20 |
| CHH7185 | - | 2 | 2026-06-22 |
| CHH7016 | - | 2 | 2026-07-02 |
| CHH7889 | - | 1 | 2026-06-24 |
| CHH7807 | - | 1 | 2026-06-23 |
| CHH7803 | - | 1 | 2026-07-17 |
| CHH7749 | Hainan Airlines | 1 | 2026-06-08 |
| CHH7737 | Hainan Airlines | 1 | 2026-06-17 |
| CHH7734 | Hainan Airlines | 1 | 2026-06-17 |
| CHH7725 | Hainan Airlines | 1 | 2026-07-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | CHH7741 | SZX → KWE | Jul 24, 04:05 UTC | Jul 24, 04:15 UTC | 10m |
| 2026-07-24 | CHH7726 | PVG → SZX | Jul 24, 00:30 UTC | Jul 24, 01:55 UTC | 1h 25m |
| 2026-07-22 | CHH7725 | SZX → PVG | Jul 22, 04:50 UTC | Jul 22, 05:00 UTC | 10m |
| 2026-07-22 | CHH7726 | PVG → SZX | Jul 22, 00:50 UTC | Jul 22, 01:35 UTC | 45m |
| 2026-07-21 | CHH7726 | PVG → SZX | Jul 21, 02:35 UTC | Jul 22, 01:35 UTC | 23h 0m |
| 2026-07-20 | CHH7247 | PEK → TFU | Jul 20, 05:20 UTC | Jul 21, 02:35 UTC | 21h 14m |
| 2026-07-19 | CHH7078 | - | Jul 19, 06:30 UTC | Jul 19, 09:55 UTC | 3h 25m |
| 2026-07-17 | CHH7803 | - | Jul 17, 01:59 UTC | Jul 17, 02:15 UTC | 15m |
| 2026-07-16 | CHH7298 | - | Jul 16, 14:00 UTC | Jul 16, 14:20 UTC | 20m |
| 2026-07-14 | CHH7668 | - | Jul 14, 14:35 UTC | Jul 15, 09:30 UTC | 18h 54m |
| 2026-07-14 | CHH7384 | - | Jul 14, 09:50 UTC | Jul 15, 05:00 UTC | 19h 9m |
| 2026-07-14 | CHH7698 | - | Jul 14, 05:25 UTC | Jul 14, 14:45 UTC | 9h 20m |
| 2026-07-11 | CHH7569 | - | Jul 11, 03:55 UTC | Jul 11, 04:05 UTC | 10m |
| 2026-07-10 | CHH7512 | - | Jul 10, 04:00 UTC | Jul 10, 04:10 UTC | 10m |
| 2026-07-08 | CHH7119 | - | Jul 8, 06:55 UTC | Jul 8, 07:45 UTC | 50m |
| 2026-07-06 | - | - | Jul 6, 01:25 UTC | Jul 6, 04:35 UTC | 3h 10m |
| 2026-07-04 | CHH7535 | - | Jul 4, 15:15 UTC | Jul 4, 15:45 UTC | 30m |
| 2026-07-04 | CHH7054 | - | Jul 4, 03:00 UTC | Jul 4, 06:15 UTC | 3h 15m |
| 2026-07-02 | CHH7016 | - | Jul 2, 09:30 UTC | Jul 2, 13:35 UTC | 4h 5m |
| 2026-06-26 | CHH7582 | - | Jun 26, 08:24 UTC | Jun 26, 08:45 UTC | 20m |
| 2026-06-25 | CHH7601 | - | Jun 25, 23:59 UTC | Jun 26, 00:10 UTC | 10m |
| 2026-06-25 | CHH7674 | - | Jun 25, 14:04 UTC | Jun 25, 14:24 UTC | 20m |
| 2026-06-25 | CHH7673 | - | Jun 25, 09:25 UTC | Jun 25, 09:40 UTC | 15m |
| 2026-06-24 | CHH7889 | - | Jun 24, 23:54 UTC | Jun 25, 00:05 UTC | 10m |
| 2026-06-24 | CHH7079 | PEK → SYX | Jun 24, 01:39 UTC | Jun 24, 07:24 UTC | 5h 45m |
| 2026-06-23 | CHH7807 | - | Jun 23, 05:49 UTC | Jun 23, 06:15 UTC | 25m |
| 2026-06-22 | CHH7185 | - | Jun 22, 23:10 UTC | Jun 22, 23:29 UTC | 20m |
| 2026-06-22 | CHH7186 | - | Jun 22, 03:45 UTC | Jun 22, 04:00 UTC | 15m |
| 2026-06-21 | CHH7185 | - | Jun 21, 23:14 UTC | Jun 21, 23:34 UTC | 20m |
| 2026-06-21 | CHH7193 | - | Jun 21, 12:35 UTC | Jun 21, 12:44 UTC | 10m |
| 2026-06-18 | CHH7026 | SZX → HAK | Jun 18, 17:40 UTC | Jun 18, 17:50 UTC | 10m |
| 2026-06-18 | CHH7376 | TFU → SZX | Jun 18, 15:55 UTC | Jun 18, 16:10 UTC | 15m |
| 2026-06-18 | CHH7375 | - | Jun 18, 07:35 UTC | Jun 18, 07:50 UTC | 15m |
| 2026-06-17 | CHH7737 | SZX → NNY | Jun 17, 22:50 UTC | Jun 17, 23:00 UTC | 10m |
| 2026-06-17 | CHH7734 | CGO → SZX | Jun 17, 17:45 UTC | Jun 17, 18:00 UTC | 15m |
| 2026-06-17 | CHH7176 | - | Jun 17, 07:50 UTC | Jun 17, 08:00 UTC | 10m |
| 2026-06-16 | CHH7256 | NKG → SZX | Jun 16, 17:15 UTC | Jun 16, 18:09 UTC | 55m |
| 2026-06-16 | CHH7255 | - | Jun 16, 11:45 UTC | Jun 16, 11:55 UTC | 10m |
| 2026-06-16 | CHH7722 | - | Jun 16, 08:44 UTC | Jun 16, 08:55 UTC | 10m |
| 2026-06-13 | CHH7247 | PEK → TFU | Jun 13, 05:05 UTC | Jun 13, 05:25 UTC | 20m |
| 2026-06-12 | CHH7547 | PEK → TFU | Jun 12, 13:30 UTC | Jun 12, 13:50 UTC | 20m |
| 2026-06-11 | CHH7674 | - | Jun 11, 14:05 UTC | Jun 11, 14:20 UTC | 15m |
| 2026-06-11 | CHH7673 | - | Jun 11, 09:35 UTC | Jun 11, 09:45 UTC | 10m |
| 2026-06-10 | CHH7726 | PVG → SZX | Jun 10, 01:30 UTC | Jun 10, 01:50 UTC | 20m |
| 2026-06-09 | CHH7721 | SZX → PVG | Jun 9, 02:35 UTC | Jun 9, 02:45 UTC | 10m |
| 2026-06-08 | CHH7749 | SYX → SZX | Jun 8, 15:55 UTC | Jun 8, 16:10 UTC | 15m |
| 2026-06-07 | CHH7384 | HGH → SYX | Jun 7, 14:20 UTC | Jun 8, 04:40 UTC | 14h 20m |
| 2026-06-07 | CHH7384 | HGH → SYX | Jun 7, 10:05 UTC | Jun 8, 04:40 UTC | 18h 35m |
| 2026-06-05 | CHH7306 | TFU → SYX | Jun 5, 01:00 UTC | Jun 5, 07:30 UTC | 6h 30m |
| 2026-06-04 | CHH7374 | HFE → SYX | Jun 4, 01:45 UTC | Jun 4, 14:30 UTC | 12h 45m |
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-5797 page for operator, model, and routing details .