sensors Mode-S transponder
780B73
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-9959 · AIRBUS A-320
- Hex
- 780B73
- Octal
- 36005563
- Decimal
- 7,867,251
- Country
- CN
- Tail
- B-9959
- Type
- A320
- Flights observed
- 70
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 21h ago
Last known position
Country allocation
The ICAO 24-bit address 780B73 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 |
|---|---|---|---|
| CSN6851 | China Southern Airlines | 8 | 2026-06-09 |
| CSN6620 | - | 5 | 2026-07-13 |
| CSN6155 | - | 5 | 2026-07-08 |
| CSN3353 | - | 5 | 2026-06-11 |
| CSN6541 | - | 4 | 2026-06-21 |
| CSN6146 | - | 4 | 2026-06-25 |
| CSN6545 | China Southern Airlines | 3 | 2026-05-29 |
| CSN6364 | - | 3 | 2026-07-10 |
| CSN6194 | - | 3 | 2026-07-02 |
| CSN5954 | - | 3 | 2026-07-06 |
| CSN8460 | China Southern Airlines | 2 | 2026-06-12 |
| CSN8256 | - | 2 | 2026-07-04 |
| CSN6619 | - | 2 | 2026-07-12 |
| CSN6603 | - | 2 | 2026-04-20 |
| CSN6570 | China Southern Airlines | 2 | 2026-05-05 |
| CSN6358 | - | 2 | 2026-06-14 |
| CSN8459 | China Southern Airlines | 1 | 2026-06-10 |
| CSN6852 | China Southern Airlines | 1 | 2026-04-23 |
| CSN6772 | China Southern Airlines | 1 | 2026-04-26 |
| CSN6759 | China Southern Airlines | 1 | 2026-04-13 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | CSN6620 | - | Jul 13, 12:10 UTC | Jul 13, 12:25 UTC | 15m |
| 2026-07-13 | CSN6620 | - | Jul 13, 07:55 UTC | Jul 13, 08:10 UTC | 15m |
| 2026-07-12 | CSN6620 | - | Jul 12, 08:01 UTC | Jul 12, 12:10 UTC | 4h 10m |
| 2026-07-12 | CSN6619 | - | Jul 12, 05:50 UTC | Jul 12, 06:10 UTC | 20m |
| 2026-07-11 | CSN6619 | - | Jul 11, 07:25 UTC | Jul 12, 02:05 UTC | 18h 40m |
| 2026-07-10 | CSN6364 | - | Jul 10, 14:05 UTC | Jul 11, 07:50 UTC | 17h 46m |
| 2026-07-09 | CSN6168 | - | Jul 9, 12:40 UTC | Jul 9, 12:50 UTC | 10m |
| 2026-07-08 | CSN6155 | - | Jul 8, 03:45 UTC | Jul 8, 08:20 UTC | 4h 35m |
| 2026-07-07 | CSN6620 | - | Jul 7, 20:25 UTC | Jul 7, 20:40 UTC | 15m |
| 2026-07-07 | CSN6620 | - | Jul 7, 16:20 UTC | Jul 7, 16:40 UTC | 20m |
| 2026-07-06 | CSN5954 | - | Jul 6, 15:05 UTC | Jul 7, 10:30 UTC | 19h 25m |
| 2026-07-06 | CSN5954 | - | Jul 6, 06:10 UTC | Jul 7, 01:50 UTC | 19h 40m |
| 2026-07-05 | CSN6364 | - | Jul 5, 07:50 UTC | Jul 6, 06:10 UTC | 22h 20m |
| 2026-07-04 | CSN8256 | - | Jul 4, 12:55 UTC | Jul 5, 08:05 UTC | 19h 10m |
| 2026-07-02 | CSN6194 | - | Jul 2, 09:15 UTC | Jul 3, 01:00 UTC | 15h 45m |
| 2026-07-01 | CSN6194 | - | Jul 1, 09:10 UTC | Jul 1, 09:20 UTC | 10m |
| 2026-06-29 | CSN5141 | - | Jun 29, 03:49 UTC | Jun 29, 08:09 UTC | 4h 20m |
| 2026-06-28 | CSN6364 | - | Jun 28, 07:25 UTC | Jun 29, 03:54 UTC | 20h 30m |
| 2026-06-25 | CSN6146 | - | Jun 25, 03:50 UTC | Jun 25, 03:59 UTC | 10m |
| 2026-06-22 | CSN5954 | CGO → CGQ | Jun 22, 13:10 UTC | Jun 22, 13:25 UTC | 15m |
| 2026-06-21 | CSN6541 | - | Jun 21, 01:30 UTC | Jun 21, 01:39 UTC | 10m |
| 2026-06-19 | CSN8256 | CKG → CGQ | Jun 19, 12:39 UTC | Jun 19, 12:59 UTC | 20m |
| 2026-06-14 | CSN6358 | - | Jun 14, 06:55 UTC | Jun 14, 07:10 UTC | 15m |
| 2026-06-13 | CSN6358 | SZX → CGQ | Jun 13, 07:15 UTC | Jun 13, 07:30 UTC | 15m |
| 2026-06-12 | CSN6553 | CGQ → PVG | Jun 12, 09:20 UTC | Jun 13, 01:50 UTC | 16h 30m |
| 2026-06-12 | CSN8460 | CAN → CGQ | Jun 12, 04:55 UTC | Jun 13, 01:50 UTC | 20h 55m |
| 2026-06-11 | CSN3353 | - | Jun 11, 15:10 UTC | Jun 11, 15:25 UTC | 15m |
| 2026-06-10 | CSN8459 | CGQ → CAN | Jun 10, 05:00 UTC | Jun 10, 10:35 UTC | 5h 35m |
| 2026-06-09 | CSN6851 | CGQ → CAN | Jun 9, 07:25 UTC | Jun 10, 05:15 UTC | 21h 50m |
| 2026-06-08 | CSN6851 | CGQ → CAN | Jun 8, 12:35 UTC | Jun 9, 07:50 UTC | 19h 15m |
| 2026-06-07 | CSN6146 | PKX → CGQ | Jun 7, 03:45 UTC | Jun 7, 04:00 UTC | 15m |
| 2026-06-03 | CSN6155 | CGQ → PVG | Jun 3, 07:15 UTC | Jun 4, 02:10 UTC | 18h 55m |
| 2026-06-03 | CSN6146 | PKX → CGQ | Jun 3, 03:45 UTC | Jun 3, 03:55 UTC | 10m |
| 2026-06-02 | CSN8460 | CAN → CGQ | Jun 2, 10:45 UTC | Jun 2, 11:05 UTC | 20m |
| 2026-06-02 | CSN3331 | CAN → NNG | Jun 2, 03:25 UTC | Jun 2, 03:35 UTC | 10m |
| 2026-05-29 | CSN6545 | CGQ → HGH | May 29, 00:25 UTC | May 29, 01:00 UTC | 35m |
| 2026-05-28 | CSN6545 | CGQ → HGH | May 28, 00:50 UTC | May 29, 00:25 UTC | 23h 35m |
| 2026-05-27 | CSN6851 | CGQ → CAN | May 27, 07:45 UTC | May 28, 01:00 UTC | 17h 15m |
| 2026-05-27 | CSN6851 | CGQ → CAN | May 27, 03:50 UTC | May 28, 01:00 UTC | 21h 11m |
| 2026-05-25 | CSN6377 | CGQ → CAN | May 25, 12:15 UTC | May 26, 04:24 UTC | 16h 10m |
| 2026-05-22 | CSN6545 | CGQ → HGH | May 22, 00:05 UTC | May 22, 00:50 UTC | 45m |
| 2026-05-21 | CSN6146 | PKX → CGQ | May 21, 03:50 UTC | May 22, 00:50 UTC | 21h 0m |
| 2026-05-20 | CSN6194 | PKX → CGQ | May 20, 09:50 UTC | May 20, 10:00 UTC | 10m |
| 2026-05-17 | CSN6155 | CGQ → PVG | May 17, 07:05 UTC | May 17, 07:50 UTC | 45m |
| 2026-05-14 | CSN6541 | CGQ → PVG | May 14, 01:35 UTC | May 15, 00:45 UTC | 23h 10m |
| 2026-05-13 | CSN6155 | CGQ → PVG | May 13, 07:05 UTC | May 14, 02:10 UTC | 19h 5m |
| 2026-05-10 | CSN3353 | - | May 10, 15:24 UTC | May 10, 15:35 UTC | 10m |
| 2026-05-09 | CSN3353 | - | May 9, 15:20 UTC | May 9, 15:30 UTC | 10m |
| 2026-05-08 | CSN3353 | - | May 8, 15:25 UTC | May 8, 15:35 UTC | 10m |
| 2026-05-08 | - | - | May 8, 05:20 UTC | May 8, 05:39 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-9959 page for operator, model, and routing details .