sensors Mode-S transponder
7821B5
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32K0 · AIRBUS A-321neo
- Hex
- 7821B5
- Octal
- 36020665
- Decimal
- 7,872,949
- Country
- CN
- Tail
- B-32K0
- Type
- A21N
- Flights observed
- 57
- Distinct callsigns
- 16
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 7821B5 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 16 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN6358 | China Southern Airlines | 13 | 2026-05-29 |
| CSN6610 | China Southern Airlines | 11 | 2026-05-26 |
| CSN6609 | China Southern Airlines | 8 | 2026-05-26 |
| CSN6357 | China Southern Airlines | 7 | 2026-05-25 |
| CSN6341 | China Southern Airlines | 3 | 2026-05-27 |
| CSN6180 | China Southern Airlines | 3 | 2026-05-21 |
| CSN6377 | China Southern Airlines | 2 | 2026-05-27 |
| CSN3571 | China Southern Airlines | 2 | 2026-04-17 |
| CSN6476 | China Southern Airlines | 1 | 2026-04-30 |
| CSN6378 | China Southern Airlines | 1 | 2026-04-26 |
| CSN6364 | China Southern Airlines | 1 | 2026-04-27 |
| CSN6342 | China Southern Airlines | 1 | 2026-05-23 |
| CSN6194 | China Southern Airlines | 1 | 2026-05-28 |
| CSN6155 | China Southern Airlines | 1 | 2026-05-03 |
| CSN6146 | China Southern Airlines | 1 | 2026-05-03 |
| CSN3936 | China Southern Airlines | 1 | 2026-04-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CSN6358 | SZX → CGQ | May 29, 08:45 UTC | May 29, 09:00 UTC | 15m |
| 2026-05-29 | CSN6358 | SZX → CGQ | May 29, 06:25 UTC | May 29, 06:40 UTC | 15m |
| 2026-05-28 | CSN6194 | PKX → CGQ | May 28, 09:45 UTC | May 29, 01:50 UTC | 16h 5m |
| 2026-05-27 | CSN6377 | CGQ → CAN | May 27, 12:30 UTC | May 28, 03:30 UTC | 15h 0m |
| 2026-05-27 | CSN6377 | CGQ → CAN | May 27, 08:15 UTC | May 28, 03:30 UTC | 19h 15m |
| 2026-05-27 | CSN6341 | CGQ → CAN | May 27, 01:19 UTC | May 27, 12:55 UTC | 11h 36m |
| 2026-05-26 | CSN6341 | CGQ → CAN | May 26, 11:20 UTC | May 27, 08:30 UTC | 21h 10m |
| 2026-05-26 | CSN6610 | SZX → CGQ | May 26, 09:19 UTC | May 27, 08:30 UTC | 23h 10m |
| 2026-05-26 | CSN6610 | SZX → CGQ | May 26, 09:09 UTC | May 27, 01:44 UTC | 16h 35m |
| 2026-05-26 | CSN6609 | CGQ → SZX | May 26, 07:10 UTC | May 26, 07:24 UTC | 15m |
| 2026-05-26 | CSN6609 | CGQ → SZX | May 26, 04:39 UTC | May 26, 04:54 UTC | 15m |
| 2026-05-25 | CSN6358 | SZX → CGQ | May 25, 06:55 UTC | May 25, 07:10 UTC | 15m |
| 2026-05-25 | CSN6357 | CGQ → SZX | May 25, 04:40 UTC | May 25, 04:50 UTC | 10m |
| 2026-05-23 | CSN6342 | CAN → CGQ | May 23, 06:20 UTC | May 23, 06:30 UTC | 10m |
| 2026-05-23 | CSN6341 | CGQ → CAN | May 23, 00:35 UTC | May 23, 01:05 UTC | 30m |
| 2026-05-21 | CSN6610 | SZX → CGQ | May 21, 15:30 UTC | May 21, 15:45 UTC | 15m |
| 2026-05-21 | CSN6610 | SZX → CGQ | May 21, 13:20 UTC | May 21, 13:30 UTC | 10m |
| 2026-05-21 | CSN6180 | PKX → CGQ | May 21, 01:05 UTC | May 21, 01:15 UTC | 10m |
| 2026-05-19 | CSN6358 | SZX → CGQ | May 19, 08:50 UTC | May 19, 09:00 UTC | 10m |
| 2026-05-19 | CSN6357 | CGQ → SZX | May 19, 04:15 UTC | May 19, 04:40 UTC | 25m |
| 2026-05-19 | CSN6357 | CGQ → SZX | May 19, 01:40 UTC | May 19, 01:50 UTC | 10m |
| 2026-05-18 | CSN6610 | SZX → CGQ | May 18, 11:25 UTC | May 18, 11:40 UTC | 15m |
| 2026-05-18 | CSN6610 | SZX → CGQ | May 18, 09:05 UTC | May 18, 09:20 UTC | 15m |
| 2026-05-18 | CSN6609 | CGQ → SZX | May 18, 07:35 UTC | May 18, 07:45 UTC | 10m |
| 2026-05-18 | CSN6609 | CGQ → SZX | May 18, 00:50 UTC | May 18, 05:10 UTC | 4h 20m |
| 2026-05-10 | CSN6358 | SZX → CGQ | May 10, 06:20 UTC | May 10, 06:30 UTC | 10m |
| 2026-05-09 | CSN6610 | SZX → CGQ | May 9, 11:35 UTC | May 9, 11:50 UTC | 15m |
| 2026-05-09 | CSN6610 | SZX → CGQ | May 9, 09:10 UTC | May 9, 09:20 UTC | 10m |
| 2026-05-09 | CSN6609 | CGQ → SZX | May 9, 07:20 UTC | May 9, 07:30 UTC | 10m |
| 2026-05-09 | CSN6609 | CGQ → SZX | May 9, 00:45 UTC | May 9, 04:55 UTC | 4h 10m |
| 2026-05-05 | CSN6610 | SZX → CGQ | May 5, 11:45 UTC | May 5, 12:00 UTC | 15m |
| 2026-05-05 | CSN6610 | SZX → CGQ | May 5, 09:10 UTC | May 5, 09:20 UTC | 10m |
| 2026-05-05 | CSN6609 | CGQ → SZX | May 5, 07:05 UTC | May 5, 07:25 UTC | 20m |
| 2026-05-05 | CSN6180 | PKX → CGQ | May 5, 00:50 UTC | May 5, 04:50 UTC | 4h 0m |
| 2026-05-04 | CSN6358 | SZX → CGQ | May 4, 08:40 UTC | May 4, 09:00 UTC | 20m |
| 2026-05-03 | CSN6155 | CGQ → PVG | May 3, 07:30 UTC | May 4, 01:35 UTC | 18h 5m |
| 2026-05-03 | CSN6146 | PKX → CGQ | May 3, 04:20 UTC | May 4, 01:35 UTC | 21h 15m |
| 2026-05-01 | CSN6358 | SZX → CGQ | May 1, 08:45 UTC | May 1, 09:00 UTC | 15m |
| 2026-05-01 | CSN6358 | SZX → CGQ | May 1, 06:25 UTC | May 1, 06:35 UTC | 10m |
| 2026-05-01 | CSN6357 | CGQ → SZX | May 1, 04:15 UTC | May 1, 04:40 UTC | 25m |
| 2026-04-30 | CSN6476 | PKX → CGQ | Apr 30, 15:05 UTC | May 1, 02:05 UTC | 11h 0m |
| 2026-04-30 | CSN6358 | SZX → CGQ | Apr 30, 09:00 UTC | Apr 30, 09:20 UTC | 20m |
| 2026-04-30 | CSN6358 | SZX → CGQ | Apr 30, 06:30 UTC | Apr 30, 06:40 UTC | 10m |
| 2026-04-29 | CSN6357 | CGQ → SZX | Apr 29, 12:15 UTC | Apr 30, 01:45 UTC | 13h 29m |
| 2026-04-29 | CSN6610 | SZX → CGQ | Apr 29, 09:55 UTC | Apr 29, 10:05 UTC | 10m |
| 2026-04-29 | CSN6609 | CGQ → SZX | Apr 29, 07:29 UTC | Apr 29, 07:40 UTC | 10m |
| 2026-04-29 | CSN6180 | PKX → CGQ | Apr 29, 00:50 UTC | Apr 29, 04:39 UTC | 3h 50m |
| 2026-04-28 | CSN6358 | SZX → CGQ | Apr 28, 08:50 UTC | Apr 28, 09:10 UTC | 20m |
| 2026-04-28 | CSN6358 | SZX → CGQ | Apr 28, 06:30 UTC | Apr 28, 06:45 UTC | 15m |
| 2026-04-28 | CSN6357 | CGQ → SZX | Apr 28, 04:20 UTC | Apr 28, 04:35 UTC | 15m |
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-32K0 page for operator, model, and routing details .