sensors Mode-S transponder
78154E
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-303G · AIRBUS A-321neo
- Hex
- 78154E
- Octal
- 36012516
- Decimal
- 7,869,774
- Country
- CN
- Tail
- B-303G
- Type
- A21N
- Flights observed
- 150
- Distinct callsigns
- 12
- Country
- CN
- Last broadcast
- Jul 26, 14:50 UTC
Last known position
Country allocation
The ICAO 24-bit address 78154E 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 12 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN686 | China Southern Airlines | 36 | 2026-07-26 |
| CSN685 | China Southern Airlines | 33 | 2026-07-26 |
| CSN629 | - | 33 | 2026-07-23 |
| CSN630 | - | 29 | 2026-07-24 |
| CSN6966 | China Southern Airlines | 5 | 2026-07-26 |
| CSN6321 | - | 3 | 2026-07-18 |
| CSN6965 | - | 2 | 2026-07-12 |
| CSN6953 | China Southern Airlines | 2 | 2026-07-24 |
| CSN8248 | - | 1 | 2026-06-29 |
| CSN6337 | China Southern Airlines | 1 | 2026-04-25 |
| CSN3608 | - | 1 | 2026-05-21 |
| CSN3607 | - | 1 | 2026-04-28 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CSN6966 | URC → XIY | Jul 26, 05:55 UTC | Jul 26, 14:50 UTC | 8h 56m |
| 2026-07-26 | CSN686 | ICN → DLC | Jul 26, 02:45 UTC | Jul 26, 03:05 UTC | 20m |
| 2026-07-26 | CSN685 | DLC → ICN | Jul 26, 00:30 UTC | Jul 26, 00:50 UTC | 20m |
| 2026-07-24 | CSN6953 | SJW → URC | Jul 24, 11:10 UTC | Jul 24, 11:20 UTC | 10m |
| 2026-07-24 | CSN6953 | SJW → URC | Jul 24, 09:20 UTC | Jul 24, 09:35 UTC | 15m |
| 2026-07-24 | CSN630 | - | Jul 24, 04:50 UTC | Jul 24, 06:55 UTC | 2h 5m |
| 2026-07-23 | CSN629 | - | Jul 23, 14:15 UTC | Jul 24, 02:45 UTC | 12h 30m |
| 2026-07-23 | CSN686 | ICN → DLC | Jul 23, 02:40 UTC | Jul 24, 01:30 UTC | 22h 50m |
| 2026-07-23 | CSN685 | DLC → ICN | Jul 23, 00:40 UTC | Jul 23, 01:00 UTC | 20m |
| 2026-07-22 | CSN686 | ICN → DLC | Jul 22, 02:50 UTC | Jul 22, 16:40 UTC | 13h 50m |
| 2026-07-22 | CSN685 | DLC → ICN | Jul 22, 00:35 UTC | Jul 22, 00:55 UTC | 20m |
| 2026-07-19 | CSN630 | - | Jul 19, 04:40 UTC | Jul 19, 06:40 UTC | 2h 0m |
| 2026-07-19 | CSN629 | - | Jul 19, 00:35 UTC | Jul 19, 02:40 UTC | 2h 5m |
| 2026-07-18 | CSN6321 | - | Jul 18, 02:00 UTC | Jul 18, 02:09 UTC | 10m |
| 2026-07-17 | CSN630 | - | Jul 17, 04:39 UTC | Jul 17, 15:10 UTC | 10h 30m |
| 2026-07-16 | CSN629 | - | Jul 16, 06:00 UTC | Jul 17, 02:30 UTC | 20h 30m |
| 2026-07-16 | CSN629 | - | Jul 16, 02:40 UTC | Jul 17, 01:29 UTC | 22h 50m |
| 2026-07-16 | CSN685 | - | Jul 16, 00:20 UTC | Jul 16, 00:40 UTC | 20m |
| 2026-07-15 | CSN630 | - | Jul 15, 04:35 UTC | Jul 15, 14:55 UTC | 10h 20m |
| 2026-07-15 | CSN629 | - | Jul 15, 00:40 UTC | Jul 15, 02:40 UTC | 2h 0m |
| 2026-07-14 | CSN629 | - | Jul 14, 02:45 UTC | Jul 15, 01:30 UTC | 22h 44m |
| 2026-07-14 | CSN685 | - | Jul 14, 00:35 UTC | Jul 14, 00:55 UTC | 20m |
| 2026-07-13 | CSN6966 | - | Jul 13, 06:30 UTC | Jul 13, 14:45 UTC | 8h 15m |
| 2026-07-12 | CSN6965 | - | Jul 12, 15:01 UTC | Jul 13, 06:40 UTC | 15h 40m |
| 2026-07-12 | CSN630 | - | Jul 12, 04:40 UTC | Jul 12, 15:05 UTC | 10h 25m |
| 2026-07-12 | CSN629 | - | Jul 12, 00:30 UTC | Jul 12, 02:35 UTC | 2h 5m |
| 2026-07-11 | CSN6321 | - | Jul 11, 01:50 UTC | Jul 11, 02:05 UTC | 15m |
| 2026-07-10 | CSN630 | - | Jul 10, 04:30 UTC | Jul 10, 15:15 UTC | 10h 45m |
| 2026-07-10 | CSN629 | - | Jul 10, 00:40 UTC | Jul 10, 02:40 UTC | 2h 0m |
| 2026-07-08 | CSN630 | - | Jul 8, 04:30 UTC | Jul 8, 06:35 UTC | 2h 5m |
| 2026-07-08 | CSN629 | - | Jul 8, 00:40 UTC | Jul 8, 02:35 UTC | 1h 55m |
| 2026-07-07 | CSN629 | - | Jul 7, 04:00 UTC | Jul 8, 02:35 UTC | 22h 35m |
| 2026-07-06 | CSN686 | - | Jul 6, 02:40 UTC | Jul 6, 03:05 UTC | 25m |
| 2026-07-06 | CSN685 | - | Jul 6, 00:25 UTC | Jul 6, 00:55 UTC | 30m |
| 2026-07-05 | CSN6965 | XIY → URC | Jul 5, 06:05 UTC | Jul 5, 14:45 UTC | 8h 40m |
| 2026-07-05 | CSN686 | - | Jul 5, 02:40 UTC | Jul 5, 03:10 UTC | 30m |
| 2026-07-05 | CSN685 | - | Jul 5, 00:40 UTC | Jul 5, 01:00 UTC | 20m |
| 2026-07-04 | CSN6966 | - | Jul 4, 06:00 UTC | Jul 4, 15:05 UTC | 9h 5m |
| 2026-07-03 | CSN630 | - | Jul 3, 04:30 UTC | Jul 3, 06:35 UTC | 2h 5m |
| 2026-07-03 | CSN629 | - | Jul 3, 00:30 UTC | Jul 3, 02:35 UTC | 2h 5m |
| 2026-07-02 | - | - | Jul 2, 02:10 UTC | Jul 2, 02:20 UTC | 10m |
| 2026-07-01 | CSN630 | - | Jul 1, 04:50 UTC | Jul 1, 07:00 UTC | 2h 10m |
| 2026-07-01 | CSN629 | - | Jul 1, 00:40 UTC | Jul 1, 02:40 UTC | 2h 0m |
| 2026-06-29 | CSN8248 | - | Jun 29, 01:10 UTC | Jun 29, 04:34 UTC | 3h 25m |
| 2026-06-28 | CSN630 | - | Jun 28, 05:34 UTC | Jun 29, 04:34 UTC | 23h 0m |
| 2026-06-28 | CSN630 | - | Jun 28, 04:29 UTC | Jun 29, 01:10 UTC | 20h 40m |
| 2026-06-28 | CSN629 | - | Jun 28, 00:30 UTC | Jun 28, 02:29 UTC | 2h 0m |
| 2026-06-26 | CSN630 | - | Jun 26, 05:19 UTC | Jun 26, 07:39 UTC | 2h 20m |
| 2026-06-26 | CSN629 | - | Jun 26, 00:35 UTC | Jun 26, 02:34 UTC | 2h 0m |
| 2026-06-25 | CSN6321 | - | Jun 25, 01:54 UTC | Jun 25, 02:10 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-303G page for operator, model, and routing details .