sensors Mode-S transponder
781E4F
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32C9 · AIRBUS A-321neo
- Hex
- 781E4F
- Octal
- 36017117
- Decimal
- 7,872,079
- Country
- CN
- Tail
- B-32C9
- Type
- A21N
- Flights observed
- 33
- Distinct callsigns
- 18
- Country
- CN
- Last broadcast
- 12h ago
Last known position
Country allocation
The ICAO 24-bit address 781E4F 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 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CCA414 | Air China | 6 | 2026-04-22 |
| CCA413 | Air China | 6 | 2026-04-24 |
| CCA4182 | Air China | 4 | 2026-05-17 |
| CCA4314 | Air China | 2 | 2026-05-04 |
| CCA4116 | Air China | 2 | 2026-05-08 |
| CCA4338 | Air China | 1 | 2026-05-23 |
| CCA4336 | Air China | 1 | 2026-05-29 |
| CCA4335 | Air China | 1 | 2026-05-29 |
| CCA4326 | Air China | 1 | 2026-05-12 |
| CCA4302 | Air China | 1 | 2026-05-26 |
| CCA4118 | Air China | 1 | 2026-04-30 |
| CCA4115 | Air China | 1 | 2026-05-08 |
| CCA4110 | Air China | 1 | 2026-04-26 |
| CCA4109 | Air China | 1 | 2026-04-26 |
| CCA4106 | Air China | 1 | 2026-05-19 |
| CCA4102 | Air China | 1 | 2026-05-09 |
| CCA1593 | Air China | 1 | 2026-05-17 |
| CCA1145 | Air China | 1 | 2026-04-29 |
Recent flights last 33
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CCA4336 | SZX → CTU | May 29, 17:25 UTC | May 29, 17:35 UTC | 10m |
| 2026-05-29 | CCA4335 | CTU → SZX | May 29, 15:30 UTC | May 29, 15:40 UTC | 10m |
| 2026-05-26 | CCA4302 | CAN → CTU | May 26, 08:50 UTC | May 26, 08:59 UTC | 10m |
| 2026-05-23 | CCA4338 | SZX → CTU | May 23, 03:50 UTC | May 23, 04:00 UTC | 10m |
| 2026-05-19 | CCA4106 | PEK → CTU | May 19, 12:35 UTC | May 19, 13:00 UTC | 25m |
| 2026-05-17 | CCA4182 | PEK → CTU | May 17, 23:15 UTC | May 18, 08:55 UTC | 9h 40m |
| 2026-05-17 | CCA1593 | PEK → YNT | May 17, 12:35 UTC | May 17, 12:50 UTC | 15m |
| 2026-05-12 | CCA4326 | SZX → CTU | May 12, 05:00 UTC | May 12, 05:20 UTC | 20m |
| 2026-05-09 | CCA4182 | PEK → CTU | May 9, 23:15 UTC | May 9, 23:35 UTC | 20m |
| 2026-05-09 | CCA4102 | PEK → CTU | May 9, 05:05 UTC | May 9, 05:20 UTC | 15m |
| 2026-05-08 | CCA4116 | PEK → CTU | May 8, 07:14 UTC | May 8, 07:29 UTC | 15m |
| 2026-05-08 | CCA4115 | CTU → PEK | May 8, 05:09 UTC | May 8, 05:20 UTC | 10m |
| 2026-05-07 | CCA4182 | PEK → CTU | May 7, 23:09 UTC | May 7, 23:29 UTC | 20m |
| 2026-05-06 | CCA4116 | PEK → CTU | May 6, 07:05 UTC | May 6, 07:25 UTC | 20m |
| 2026-05-05 | CCA4182 | PEK → CTU | May 5, 23:15 UTC | May 5, 23:40 UTC | 25m |
| 2026-05-04 | CCA4314 | SZX → CTU | May 4, 09:30 UTC | May 4, 09:45 UTC | 15m |
| 2026-04-30 | CCA4118 | PEK → CTU | Apr 30, 14:15 UTC | Apr 30, 14:30 UTC | 15m |
| 2026-04-29 | CCA1145 | PEK → TYN | Apr 29, 23:15 UTC | Apr 29, 23:25 UTC | 10m |
| 2026-04-27 | CCA4314 | SZX → CTU | Apr 27, 09:40 UTC | Apr 27, 09:50 UTC | 10m |
| 2026-04-26 | CCA4110 | PEK → CTU | Apr 26, 11:55 UTC | Apr 26, 12:10 UTC | 15m |
| 2026-04-26 | CCA4109 | CTU → PEK | Apr 26, 09:20 UTC | Apr 26, 09:30 UTC | 10m |
| 2026-04-24 | CCA413 | TFU → HKT | Apr 24, 03:45 UTC | Apr 24, 08:55 UTC | 5h 10m |
| 2026-04-23 | CCA413 | TFU → HKT | Apr 23, 07:15 UTC | Apr 24, 05:00 UTC | 21h 45m |
| 2026-04-22 | CCA414 | HKT → TFU | Apr 22, 07:50 UTC | Apr 23, 07:30 UTC | 23h 40m |
| 2026-04-22 | CCA413 | TFU → HKT | Apr 22, 03:55 UTC | Apr 22, 08:55 UTC | 5h 0m |
| 2026-04-21 | CCA413 | TFU → HKT | Apr 21, 08:00 UTC | Apr 22, 07:45 UTC | 23h 45m |
| 2026-04-20 | CCA414 | HKT → TFU | Apr 20, 03:50 UTC | Apr 20, 09:00 UTC | 5h 10m |
| 2026-04-19 | CCA413 | TFU → HKT | Apr 19, 09:00 UTC | Apr 20, 07:45 UTC | 22h 45m |
| 2026-04-18 | CCA414 | HKT → TFU | Apr 18, 07:40 UTC | Apr 18, 08:25 UTC | 45m |
| 2026-04-18 | CCA414 | HKT → TFU | Apr 18, 04:20 UTC | Apr 18, 08:25 UTC | 4h 5m |
| 2026-04-16 | CCA414 | HKT → TFU | Apr 16, 07:45 UTC | Apr 16, 08:35 UTC | 50m |
| 2026-04-16 | CCA413 | TFU → HKT | Apr 16, 04:14 UTC | Apr 16, 05:00 UTC | 45m |
| 2026-04-14 | CCA414 | HKT → TFU | Apr 14, 07:50 UTC | Apr 14, 08:10 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-32C9 page for operator, model, and routing details .