sensors Mode-S transponder
781D48
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-328N · AIRBUS A-321neo
- Hex
- 781D48
- Octal
- 36016510
- Decimal
- 7,871,816
- Country
- CN
- Tail
- B-328N
- Type
- A21N
- Flights observed
- 25
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 16h ago
Last known position
Country allocation
The ICAO 24-bit address 781D48 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 |
|---|---|---|---|
| CCA742 | Air China | 2 | 2026-04-25 |
| CCA741 | Air China | 2 | 2026-05-27 |
| CCA4108 | Air China | 2 | 2026-05-18 |
| CCA811 | Air China | 1 | 2026-05-28 |
| CCA4326 | Air China | 1 | 2026-04-27 |
| CCA4325 | Air China | 1 | 2026-04-27 |
| CCA4314 | Air China | 1 | 2026-04-17 |
| CCA1931 | Air China | 1 | 2026-05-27 |
| CCA1845 | Air China | 1 | 2026-05-28 |
| CCA1811 | Air China | 1 | 2026-04-19 |
| CCA1722 | Air China | 1 | 2026-05-26 |
| CCA1693 | Air China | 1 | 2026-05-25 |
| CCA1635 | Air China | 1 | 2026-04-24 |
| CCA1554 | - | 1 | 2026-04-22 |
| CCA1539 | - | 1 | 2026-06-02 |
| CCA1537 | Air China | 1 | 2026-05-26 |
| CCA1374 | Air China | 1 | 2026-05-29 |
| CCA1373 | Air China | 1 | 2026-05-29 |
| CCA1362 | Air China | 1 | 2026-04-21 |
| CCA1361 | Air China | 1 | 2026-04-21 |
Recent flights last 25
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | CCA1539 | - | Jun 2, 11:35 UTC | Jun 2, 11:45 UTC | 10m |
| 2026-05-29 | CCA1374 | CSX → PEK | May 29, 10:40 UTC | May 29, 10:50 UTC | 10m |
| 2026-05-29 | CCA1373 | PEK → CSX | May 29, 05:15 UTC | May 29, 05:40 UTC | 25m |
| 2026-05-28 | CCA1845 | PEK → HFE | May 28, 13:05 UTC | May 28, 13:15 UTC | 10m |
| 2026-05-28 | CCA811 | PEK → VVO | May 28, 05:15 UTC | May 28, 05:25 UTC | 10m |
| 2026-05-27 | CCA1931 | PEK → NNG | May 27, 11:50 UTC | May 27, 12:15 UTC | 25m |
| 2026-05-27 | CCA741 | PEK → HAN | May 27, 01:19 UTC | May 27, 01:39 UTC | 20m |
| 2026-05-26 | CCA1722 | CAN → HGH | May 26, 09:04 UTC | May 26, 09:15 UTC | 10m |
| 2026-05-26 | CCA1537 | PEK → KHN | May 26, 00:44 UTC | May 26, 00:54 UTC | 10m |
| 2026-05-25 | CCA1693 | PEK → JMU | May 25, 10:45 UTC | May 25, 10:55 UTC | 10m |
| 2026-05-18 | CCA4108 | PEK → CTU | May 18, 06:35 UTC | May 18, 06:50 UTC | 15m |
| 2026-04-27 | CCA4326 | SZX → CTU | Apr 27, 05:00 UTC | Apr 27, 05:15 UTC | 15m |
| 2026-04-27 | CCA4325 | CTU → SZX | Apr 27, 02:55 UTC | Apr 27, 03:05 UTC | 10m |
| 2026-04-25 | CCA4108 | PEK → CTU | Apr 25, 12:40 UTC | Apr 26, 06:40 UTC | 18h 0m |
| 2026-04-25 | CCA742 | HAN → PEK | Apr 25, 09:50 UTC | Apr 25, 10:00 UTC | 10m |
| 2026-04-25 | CCA741 | PEK → HAN | Apr 25, 01:25 UTC | Apr 25, 01:40 UTC | 15m |
| 2026-04-24 | CCA1635 | PEK → SHE | Apr 24, 11:15 UTC | Apr 24, 11:25 UTC | 10m |
| 2026-04-23 | CCA742 | HAN → PEK | Apr 23, 09:40 UTC | Apr 23, 09:50 UTC | 10m |
| 2026-04-22 | CCA1554 | - | Apr 22, 04:00 UTC | Apr 22, 04:10 UTC | 10m |
| 2026-04-21 | CCA1362 | HAK → PEK | Apr 21, 08:50 UTC | Apr 21, 09:00 UTC | 10m |
| 2026-04-21 | CCA1361 | PEK → HAK | Apr 21, 00:30 UTC | Apr 21, 00:55 UTC | 25m |
| 2026-04-19 | CCA1811 | PEK → XMN | Apr 19, 09:45 UTC | Apr 19, 09:55 UTC | 10m |
| 2026-04-17 | CCA4314 | SZX → CTU | Apr 17, 12:45 UTC | Apr 17, 12:55 UTC | 10m |
| 2026-04-16 | CCA1308 | SZX → PEK | Apr 16, 02:45 UTC | Apr 16, 03:00 UTC | 15m |
| 2026-04-15 | CCA1305 | PEK → SZX | Apr 15, 13:15 UTC | Apr 15, 13:40 UTC | 25m |
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-328N page for operator, model, and routing details .