sensors Mode-S transponder
781555
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-303C · AIRBUS A-330-300
- Hex
- 781555
- Octal
- 36012525
- Decimal
- 7,869,781
- Country
- CN
- Tail
- B-303C
- Type
- A333
- Flights observed
- 105
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 38m ago
Last known position
Country allocation
The ICAO 24-bit address 781555 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 |
|---|---|---|---|
| CHH7985 | Hainan Airlines | 22 | 2026-05-26 |
| CHH7986 | Hainan Airlines | 16 | 2026-05-26 |
| CHH754 | Hainan Airlines | 12 | 2026-05-22 |
| CHH753 | Hainan Airlines | 11 | 2026-05-21 |
| CHH407 | Hainan Airlines | 5 | 2026-04-17 |
| CHH408 | Hainan Airlines | 4 | 2026-04-17 |
| CHH7965 | Hainan Airlines | 3 | 2026-05-27 |
| CHH765 | Hainan Airlines | 3 | 2026-04-25 |
| CHH751 | Hainan Airlines | 3 | 2026-05-29 |
| CHH7966 | Hainan Airlines | 2 | 2026-05-27 |
| CHH7715 | Hainan Airlines | 2 | 2026-04-19 |
| CHH770 | Hainan Airlines | 2 | 2026-05-09 |
| CHH766 | Hainan Airlines | 2 | 2026-04-25 |
| CHH752 | Hainan Airlines | 2 | 2026-05-14 |
| CHH7716 | - | 1 | 2026-04-14 |
| CHH7709 | Hainan Airlines | 1 | 2026-04-14 |
| CHH7702 | Hainan Airlines | 1 | 2026-04-19 |
| CHH769 | Hainan Airlines | 1 | 2026-05-08 |
| CHH7612 | Hainan Airlines | 1 | 2026-05-29 |
| CHH7607 | Hainan Airlines | 1 | 2026-05-29 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CHH751 | PEK → DUB | May 29, 19:05 UTC | May 30, 05:15 UTC | 10h 10m |
| 2026-05-29 | CHH7612 | PVG → PEK | May 29, 14:10 UTC | May 29, 14:25 UTC | 15m |
| 2026-05-29 | CHH7607 | PEK → SHA | May 29, 09:25 UTC | May 29, 09:35 UTC | 10m |
| 2026-05-28 | CHH7267 | PEK → CKG | May 28, 09:55 UTC | May 28, 10:10 UTC | 15m |
| 2026-05-27 | CHH7966 | LED → PEK | May 27, 17:30 UTC | May 27, 17:50 UTC | 20m |
| 2026-05-27 | CHH7965 | PEK → LED | May 27, 07:15 UTC | May 27, 14:30 UTC | 7h 15m |
| 2026-05-26 | CHH7986 | SVO → PEK | May 26, 23:54 UTC | May 27, 00:19 UTC | 25m |
| 2026-05-26 | CHH7986 | SVO → PEK | May 26, 18:34 UTC | May 26, 21:29 UTC | 2h 55m |
| 2026-05-26 | CHH7985 | PEK → SVO | May 26, 06:34 UTC | May 26, 10:34 UTC | 4h 0m |
| 2026-05-25 | CHH7986 | SVO → PEK | May 25, 17:20 UTC | May 25, 17:45 UTC | 25m |
| 2026-05-24 | CHH7985 | PEK → SVO | May 24, 21:05 UTC | May 25, 13:35 UTC | 16h 30m |
| 2026-05-24 | CHH7985 | PEK → SVO | May 24, 18:55 UTC | May 25, 13:35 UTC | 18h 40m |
| 2026-05-24 | CHH7985 | PEK → SVO | May 24, 10:30 UTC | May 24, 13:50 UTC | 3h 20m |
| 2026-05-23 | CHH7985 | PEK → SVO | May 23, 17:25 UTC | May 24, 13:50 UTC | 20h 25m |
| 2026-05-23 | CHH7985 | PEK → SVO | May 23, 10:15 UTC | May 23, 13:30 UTC | 3h 15m |
| 2026-05-22 | CHH7985 | PEK → SVO | May 22, 17:20 UTC | May 23, 13:30 UTC | 20h 9m |
| 2026-05-22 | CHH7985 | PEK → SVO | May 22, 17:05 UTC | May 23, 13:30 UTC | 20h 24m |
| 2026-05-22 | CHH754 | MAN → PEK | May 22, 13:20 UTC | May 23, 13:15 UTC | 23h 54m |
| 2026-05-22 | CHH754 | MAN → PEK | May 22, 11:40 UTC | May 23, 10:55 UTC | 23h 14m |
| 2026-05-21 | CHH753 | PEK → MAN | May 21, 22:20 UTC | May 22, 05:30 UTC | 7h 10m |
| 2026-05-21 | CHH753 | PEK → MAN | May 21, 19:05 UTC | May 21, 19:15 UTC | 10m |
| 2026-05-17 | CHH754 | MAN → PEK | May 17, 21:05 UTC | May 17, 21:25 UTC | 20m |
| 2026-05-17 | CHH754 | MAN → PEK | May 17, 12:10 UTC | May 17, 18:30 UTC | 6h 20m |
| 2026-05-16 | CHH753 | PEK → MAN | May 16, 22:30 UTC | May 17, 05:40 UTC | 7h 10m |
| 2026-05-14 | CHH752 | DUB → PEK | May 14, 11:15 UTC | May 14, 18:10 UTC | 6h 55m |
| 2026-05-13 | CHH751 | PEK → DUB | May 13, 20:40 UTC | May 13, 22:40 UTC | 2h 0m |
| 2026-05-12 | CHH752 | DUB → PEK | May 12, 11:15 UTC | May 12, 17:50 UTC | 6h 35m |
| 2026-05-11 | CHH751 | PEK → DUB | May 11, 21:00 UTC | May 12, 06:10 UTC | 9h 10m |
| 2026-05-09 | CHH770 | OSL → PEK | May 9, 19:35 UTC | May 9, 19:49 UTC | 15m |
| 2026-05-09 | CHH770 | OSL → PEK | May 9, 11:45 UTC | May 9, 17:00 UTC | 5h 15m |
| 2026-05-08 | CHH769 | PEK → OSL | May 8, 19:30 UTC | May 9, 05:00 UTC | 9h 30m |
| 2026-05-08 | CHH7336 | CSX → PEK | May 8, 10:25 UTC | May 8, 10:35 UTC | 10m |
| 2026-05-08 | CHH7335 | PEK → CSX | May 8, 04:39 UTC | May 8, 04:54 UTC | 15m |
| 2026-05-08 | CHH7986 | SVO → PEK | May 8, 00:09 UTC | May 8, 00:29 UTC | 20m |
| 2026-05-07 | CHH7985 | PEK → SVO | May 7, 06:50 UTC | May 7, 21:35 UTC | 14h 45m |
| 2026-05-06 | CHH7986 | SVO → PEK | May 6, 23:40 UTC | May 6, 23:55 UTC | 15m |
| 2026-05-06 | CHH7986 | SVO → PEK | May 6, 17:25 UTC | May 6, 21:10 UTC | 3h 44m |
| 2026-05-06 | CHH7985 | PEK → SVO | May 6, 08:35 UTC | May 6, 13:30 UTC | 4h 55m |
| 2026-05-05 | CHH7448 | TFU → PEK | May 5, 14:05 UTC | May 5, 14:20 UTC | 15m |
| 2026-05-05 | CHH7347 | PEK → TFU | May 5, 07:00 UTC | May 5, 07:10 UTC | 10m |
| 2026-05-05 | CHH7198 | LHW → PEK | May 5, 03:55 UTC | May 5, 04:20 UTC | 25m |
| 2026-05-04 | CHH7197 | PEK → LHW | May 4, 23:10 UTC | May 4, 23:35 UTC | 25m |
| 2026-05-04 | CHH7278 | HGH → PEK | May 4, 05:30 UTC | May 4, 05:40 UTC | 10m |
| 2026-05-03 | CHH7279 | PEK → SYX | May 3, 05:20 UTC | May 3, 08:30 UTC | 3h 10m |
| 2026-05-02 | CHH7986 | SVO → PEK | May 2, 23:55 UTC | May 3, 00:10 UTC | 15m |
| 2026-05-02 | CHH7985 | PEK → SVO | May 2, 08:30 UTC | May 2, 21:20 UTC | 12h 50m |
| 2026-05-02 | CHH7986 | SVO → PEK | May 2, 00:00 UTC | May 2, 00:15 UTC | 15m |
| 2026-05-01 | CHH7985 | PEK → SVO | May 1, 07:05 UTC | May 1, 21:25 UTC | 14h 20m |
| 2026-05-01 | CHH7986 | SVO → PEK | May 1, 00:00 UTC | May 1, 00:20 UTC | 20m |
| 2026-04-30 | CHH7986 | SVO → PEK | Apr 30, 17:40 UTC | Apr 30, 21:30 UTC | 3h 50m |
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-303C page for operator, model, and routing details .