sensors Mode-S transponder
781035
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1559 · BOEING 737-800
- Hex
- 781035
- Octal
- 36010065
- Decimal
- 7,868,469
- Country
- CN
- Tail
- B-1559
- Type
- B738
- Flights observed
- 31
- Distinct callsigns
- 12
- Country
- CN
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 781035 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 12 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| FZA6635 | Fuzhou Airlines | 6 | 2026-06-06 |
| FZA6767 | - | 5 | 2026-06-05 |
| FZA6573 | Fuzhou Airlines | 5 | 2026-05-24 |
| FZA6652 | Fuzhou Airlines | 3 | 2026-05-22 |
| FZA6768 | - | 2 | 2026-06-03 |
| FZA6651 | Fuzhou Airlines | 2 | 2026-05-22 |
| FZA6636 | Fuzhou Airlines | 2 | 2026-06-06 |
| FZA6531 | Fuzhou Airlines | 2 | 2026-04-24 |
| FZA6666 | Fuzhou Airlines | 1 | 2026-04-24 |
| FZA6648 | - | 1 | 2026-05-09 |
| FZA6512 | Fuzhou Airlines | 1 | 2026-05-31 |
| FZA6510 | Fuzhou Airlines | 1 | 2026-05-17 |
Recent flights last 31
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-06 | FZA6636 | XNT → HRB | Jun 6, 09:24 UTC | Jun 6, 09:50 UTC | 25m |
| 2026-06-06 | FZA6635 | HRB → XNT | Jun 6, 06:30 UTC | Jun 6, 06:50 UTC | 20m |
| 2026-06-06 | FZA6635 | HRB → XNT | Jun 6, 02:25 UTC | Jun 6, 02:40 UTC | 15m |
| 2026-06-05 | FZA6767 | - | Jun 5, 01:15 UTC | Jun 5, 13:55 UTC | 12h 40m |
| 2026-06-04 | FZA6767 | - | Jun 4, 13:25 UTC | Jun 5, 10:00 UTC | 20h 35m |
| 2026-06-04 | FZA6636 | XNT → HRB | Jun 4, 09:20 UTC | Jun 5, 09:15 UTC | 23h 55m |
| 2026-06-03 | FZA6635 | HRB → XNT | Jun 3, 19:05 UTC | Jun 4, 07:05 UTC | 12h 0m |
| 2026-06-03 | FZA6635 | HRB → XNT | Jun 3, 09:40 UTC | Jun 4, 07:05 UTC | 21h 25m |
| 2026-06-03 | FZA6768 | - | Jun 3, 08:50 UTC | Jun 4, 07:05 UTC | 22h 15m |
| 2026-06-02 | FZA6767 | - | Jun 2, 12:25 UTC | Jun 3, 06:05 UTC | 17h 40m |
| 2026-06-01 | FZA6768 | - | Jun 1, 06:15 UTC | Jun 1, 10:45 UTC | 4h 30m |
| 2026-05-31 | FZA6512 | KWE → FOC | May 31, 08:25 UTC | May 31, 09:05 UTC | 40m |
| 2026-05-24 | FZA6573 | FOC → NNG | May 24, 03:30 UTC | May 24, 07:00 UTC | 3h 30m |
| 2026-05-22 | FZA6652 | SZX → KMG | May 22, 10:30 UTC | May 22, 10:45 UTC | 15m |
| 2026-05-22 | FZA6651 | KMG → SZX | May 22, 07:50 UTC | May 22, 08:00 UTC | 10m |
| 2026-05-17 | FZA6510 | KMG → FOC | May 17, 15:01 UTC | May 17, 15:15 UTC | 15m |
| 2026-05-15 | FZA6652 | SZX → KMG | May 15, 12:15 UTC | May 15, 17:15 UTC | 4h 59m |
| 2026-05-13 | FZA6573 | FOC → NNG | May 13, 03:50 UTC | May 13, 04:10 UTC | 20m |
| 2026-05-09 | FZA6648 | - | May 9, 02:30 UTC | May 9, 02:45 UTC | 15m |
| 2026-05-07 | FZA6767 | - | May 7, 23:49 UTC | May 8, 13:15 UTC | 13h 25m |
| 2026-05-07 | FZA6767 | - | May 7, 13:35 UTC | May 8, 13:15 UTC | 23h 40m |
| 2026-05-07 | FZA6635 | HRB → XNT | May 7, 02:25 UTC | May 7, 02:35 UTC | 10m |
| 2026-05-06 | FZA6573 | FOC → NNG | May 6, 03:35 UTC | May 6, 06:50 UTC | 3h 15m |
| 2026-04-28 | FZA6635 | HRB → XNT | Apr 28, 02:20 UTC | Apr 28, 02:30 UTC | 10m |
| 2026-04-24 | FZA6666 | PEK → FOC | Apr 24, 15:15 UTC | Apr 24, 15:30 UTC | 15m |
| 2026-04-24 | FZA6531 | FOC → HAK | Apr 24, 04:25 UTC | Apr 24, 05:15 UTC | 50m |
| 2026-04-22 | FZA6531 | FOC → HAK | Apr 22, 03:45 UTC | Apr 22, 07:35 UTC | 3h 50m |
| 2026-04-20 | FZA6652 | SZX → KMG | Apr 20, 10:35 UTC | Apr 20, 15:25 UTC | 4h 50m |
| 2026-04-20 | FZA6651 | KMG → SZX | Apr 20, 07:25 UTC | Apr 20, 07:35 UTC | 10m |
| 2026-04-18 | FZA6573 | FOC → NNG | Apr 18, 02:50 UTC | Apr 18, 03:20 UTC | 30m |
| 2026-04-16 | FZA6573 | FOC → NNG | Apr 16, 03:09 UTC | Apr 16, 03:30 UTC | 20m |
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-1559 page for operator, model, and routing details .