sensors Mode-S transponder
781941
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-20EN · BOEING 777-200LR
- Hex
- 781941
- Octal
- 36014501
- Decimal
- 7,870,785
- Country
- CN
- Tail
- B-20EN
- Type
- B77L
- Flights observed
- 118
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 1d ago
Current position
Country allocation
The ICAO 24-bit address 781941 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 |
|---|---|---|---|
| CSN485 | China Southern Airlines | 17 | 2026-05-19 |
| CSN5213 | China Southern Airlines | 8 | 2026-05-04 |
| CSN5214 | China Southern Airlines | 7 | 2026-05-05 |
| CSN451 | China Southern Airlines | 7 | 2026-05-06 |
| CSN427 | China Southern Airlines | 7 | 2026-05-28 |
| CSN486 | China Southern Airlines | 6 | 2026-05-20 |
| CSN453 | China Southern Airlines | 6 | 2026-05-08 |
| CSN452 | China Southern Airlines | 6 | 2026-05-06 |
| CSN454 | China Southern Airlines | 5 | 2026-05-09 |
| CSN435 | China Southern Airlines | 5 | 2026-05-26 |
| CSN467 | China Southern Airlines | 4 | 2026-05-13 |
| CSN462 | China Southern Airlines | 4 | 2026-05-13 |
| CSN461 | China Southern Airlines | 3 | 2026-05-10 |
| CSN440 | China Southern Airlines | 3 | 2026-04-15 |
| CSN439 | China Southern Airlines | 3 | 2026-04-15 |
| CSN437 | China Southern Airlines | 3 | 2026-04-26 |
| CSN436 | China Southern Airlines | 3 | 2026-05-27 |
| CSN428 | China Southern Airlines | 3 | 2026-05-28 |
| CSN5223 | China Southern Airlines | 2 | 2026-05-25 |
| CSN5220 | China Southern Airlines | 2 | 2026-04-28 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | CSN428 | ORD → PVG | May 28, 15:20 UTC | May 28, 21:30 UTC | 6h 10m |
| 2026-05-28 | CSN427 | SEA → ORD | May 28, 06:25 UTC | May 28, 11:50 UTC | 5h 25m |
| 2026-05-27 | CSN427 | SEA → ORD | May 27, 10:45 UTC | May 28, 05:05 UTC | 18h 20m |
| 2026-05-27 | CSN427 | SEA → ORD | May 27, 04:39 UTC | May 28, 04:15 UTC | 23h 35m |
| 2026-05-27 | CSN436 | AMS → PVG | May 27, 00:19 UTC | May 27, 23:10 UTC | 22h 50m |
| 2026-05-26 | CSN436 | AMS → PVG | May 26, 22:44 UTC | May 27, 22:15 UTC | 23h 30m |
| 2026-05-26 | CSN435 | ANC → ORD | May 26, 15:09 UTC | May 26, 20:29 UTC | 5h 20m |
| 2026-05-25 | CSN435 | ANC → ORD | May 25, 18:55 UTC | May 26, 13:15 UTC | 18h 20m |
| 2026-05-25 | CSN435 | ANC → ORD | May 25, 16:40 UTC | May 26, 13:15 UTC | 20h 35m |
| 2026-05-25 | CSN464 | FRA → PVG | May 25, 14:20 UTC | May 26, 13:15 UTC | 22h 55m |
| 2026-05-25 | CSN464 | FRA → PVG | May 25, 13:45 UTC | May 26, 12:14 UTC | 22h 30m |
| 2026-05-25 | CSN5223 | AMS → AMS | May 25, 04:00 UTC | May 25, 08:55 UTC | 4h 55m |
| 2026-05-23 | CSN470 | FRA → CAN | May 23, 11:40 UTC | May 23, 17:25 UTC | 5h 45m |
| 2026-05-23 | CSN5223 | AMS → AMS | May 23, 03:50 UTC | May 23, 08:55 UTC | 5h 5m |
| 2026-05-21 | CSN470 | FRA → CAN | May 21, 14:20 UTC | May 21, 20:20 UTC | 6h 0m |
| 2026-05-20 | CSN463 | PVG → FRA | May 20, 16:35 UTC | May 21, 10:00 UTC | 17h 25m |
| 2026-05-20 | CSN463 | PVG → FRA | May 20, 07:00 UTC | May 21, 06:15 UTC | 23h 15m |
| 2026-05-20 | CSN486 | YYZ → PVG | May 20, 04:25 UTC | May 21, 00:40 UTC | 20h 16m |
| 2026-05-19 | CSN485 | YVR → YYZ | May 19, 20:25 UTC | May 20, 01:55 UTC | 5h 30m |
| 2026-05-19 | CSN485 | YVR → YYZ | May 19, 11:20 UTC | May 19, 18:15 UTC | 6h 55m |
| 2026-05-18 | CSN485 | YVR → YYZ | May 18, 15:10 UTC | May 19, 12:35 UTC | 21h 24m |
| 2026-05-18 | CSN496 | AMS → CKG | May 18, 13:10 UTC | May 19, 12:15 UTC | 23h 4m |
| 2026-05-18 | CSN496 | AMS → CKG | May 18, 10:00 UTC | May 18, 16:00 UTC | 6h 0m |
| 2026-05-17 | CSN495 | PVG → AMS | May 17, 14:40 UTC | May 18, 06:20 UTC | 15h 40m |
| 2026-05-17 | CSN495 | PVG → AMS | May 17, 05:00 UTC | May 18, 03:10 UTC | 22h 10m |
| 2026-05-17 | CSN486 | YYZ → PVG | May 17, 02:20 UTC | May 18, 00:10 UTC | 21h 50m |
| 2026-05-16 | CSN485 | YVR → YYZ | May 16, 17:20 UTC | May 16, 23:05 UTC | 5h 45m |
| 2026-05-16 | CSN485 | YVR → YYZ | May 16, 08:46 UTC | May 16, 16:05 UTC | 7h 20m |
| 2026-05-15 | CSN485 | YVR → YYZ | May 15, 14:55 UTC | May 16, 14:16 UTC | 23h 21m |
| 2026-05-15 | CSN486 | YYZ → PVG | May 15, 02:15 UTC | May 15, 15:15 UTC | 12h 59m |
| 2026-05-14 | CSN485 | YVR → YYZ | May 14, 17:50 UTC | May 14, 23:40 UTC | 5h 50m |
| 2026-05-13 | CSN485 | YVR → YYZ | May 13, 20:35 UTC | May 14, 16:15 UTC | 19h 40m |
| 2026-05-13 | CSN485 | YVR → YYZ | May 13, 19:05 UTC | May 14, 16:15 UTC | 21h 10m |
| 2026-05-13 | CSN485 | YVR → YYZ | May 13, 16:50 UTC | May 14, 16:15 UTC | 23h 25m |
| 2026-05-13 | CSN462 | FRA → PVG | May 13, 14:20 UTC | May 14, 10:10 UTC | 19h 50m |
| 2026-05-13 | CSN462 | FRA → PVG | May 13, 13:45 UTC | May 14, 10:10 UTC | 20h 25m |
| 2026-05-13 | CSN467 | CAN → FRA | May 13, 08:35 UTC | May 13, 09:25 UTC | 50m |
| 2026-05-13 | CSN467 | CAN → FRA | May 13, 04:30 UTC | May 13, 08:30 UTC | 4h 0m |
| 2026-05-10 | CSN468 | FRA → CAN | May 10, 17:59 UTC | May 10, 23:44 UTC | 5h 45m |
| 2026-05-10 | CSN461 | PVG → FRA | May 10, 08:15 UTC | May 10, 14:54 UTC | 6h 40m |
| 2026-05-09 | CSN461 | PVG → FRA | May 9, 16:20 UTC | May 10, 14:54 UTC | 22h 35m |
| 2026-05-09 | CSN461 | PVG → FRA | May 9, 14:20 UTC | May 10, 14:14 UTC | 23h 55m |
| 2026-05-09 | CSN454 | AMS → AMS | May 9, 12:20 UTC | May 10, 11:55 UTC | 23h 35m |
| 2026-05-09 | CSN454 | AMS → AMS | May 9, 11:05 UTC | May 10, 09:00 UTC | 21h 55m |
| 2026-05-08 | CSN453 | PVG → AMS | May 8, 14:40 UTC | May 9, 07:25 UTC | 16h 45m |
| 2026-05-08 | CSN453 | PVG → AMS | May 8, 05:20 UTC | May 9, 04:15 UTC | 22h 55m |
| 2026-05-08 | CSN486 | YYZ → PVG | May 8, 02:39 UTC | May 9, 01:15 UTC | 22h 35m |
| 2026-05-07 | CSN485 | YVR → YYZ | May 7, 18:50 UTC | May 8, 00:20 UTC | 5h 30m |
| 2026-05-06 | CSN485 | YVR → YYZ | May 6, 23:40 UTC | May 7, 16:20 UTC | 16h 40m |
| 2026-05-06 | CSN485 | YVR → YYZ | May 6, 20:20 UTC | May 7, 16:20 UTC | 20h 1m |
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-20EN page for operator, model, and routing details .