sensors Mode-S transponder
7815A1
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-304N · AIRBUS A-350-900
- Hex
- 7815A1
- Octal
- 36012641
- Decimal
- 7,869,857
- Country
- CN
- Tail
- B-304N
- Type
- A359
- Flights observed
- 198
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- Jul 26, 16:10 UTC
Last known position
Country allocation
The ICAO 24-bit address 7815A1 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 |
|---|---|---|---|
| CES243 | - | 25 | 2026-07-12 |
| CES244 | China Eastern Airlines | 23 | 2026-07-06 |
| CES785 | China Eastern Airlines | 9 | 2026-07-25 |
| CES787 | China Eastern Airlines | 8 | 2026-06-01 |
| CES786 | China Eastern Airlines | 8 | 2026-07-26 |
| CES5350 | China Eastern Airlines | 8 | 2026-07-24 |
| CES262 | - | 8 | 2026-07-16 |
| CES217 | - | 8 | 2026-07-09 |
| CES752 | - | 7 | 2026-06-04 |
| CES751 | - | 7 | 2026-06-04 |
| CES250 | China Eastern Airlines | 7 | 2026-07-08 |
| CES249 | China Eastern Airlines | 7 | 2026-07-07 |
| CES788 | China Eastern Airlines | 6 | 2026-06-01 |
| CES5341 | China Eastern Airlines | 6 | 2026-07-21 |
| CES223 | China Eastern Airlines | 6 | 2026-05-23 |
| CES218 | - | 6 | 2026-07-10 |
| CES562 | - | 5 | 2026-06-28 |
| CES561 | China Eastern Airlines | 5 | 2026-06-27 |
| CES7236 | - | 4 | 2026-07-05 |
| CES7235 | - | 4 | 2026-07-04 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CES786 | VCE → PVG | Jul 26, 09:45 UTC | Jul 26, 16:10 UTC | 6h 25m |
| 2026-07-25 | CES785 | PVG → VCE | Jul 25, 18:50 UTC | Jul 26, 04:35 UTC | 9h 45m |
| 2026-07-24 | CES5350 | SZX → SHA | Jul 24, 12:05 UTC | Jul 24, 12:15 UTC | 10m |
| 2026-07-21 | CES5341 | SHA → SZX | Jul 21, 10:45 UTC | Jul 21, 11:10 UTC | 25m |
| 2026-07-20 | CES5350 | - | Jul 20, 11:40 UTC | Jul 20, 11:50 UTC | 10m |
| 2026-07-20 | CES5341 | - | Jul 20, 09:40 UTC | Jul 20, 09:50 UTC | 10m |
| 2026-07-19 | CES5350 | - | Jul 19, 15:10 UTC | Jul 19, 15:20 UTC | 10m |
| 2026-07-19 | CES5341 | - | Jul 19, 12:45 UTC | Jul 19, 13:35 UTC | 50m |
| 2026-07-18 | CES5341 | - | Jul 18, 08:55 UTC | Jul 18, 09:40 UTC | 45m |
| 2026-07-17 | CES5350 | - | Jul 17, 12:25 UTC | Jul 17, 12:35 UTC | 10m |
| 2026-07-17 | CES5341 | - | Jul 17, 09:55 UTC | Jul 17, 10:40 UTC | 45m |
| 2026-07-16 | CES262 | - | Jul 16, 10:20 UTC | Jul 17, 10:05 UTC | 23h 45m |
| 2026-07-16 | CES262 | - | Jul 16, 07:05 UTC | Jul 16, 11:40 UTC | 4h 35m |
| 2026-07-15 | CES261 | - | Jul 15, 09:25 UTC | Jul 15, 17:40 UTC | 8h 15m |
| 2026-07-13 | CES244D | - | Jul 13, 14:20 UTC | Jul 14, 09:10 UTC | 18h 50m |
| 2026-07-13 | CES244D | - | Jul 13, 12:20 UTC | Jul 14, 09:10 UTC | 20h 50m |
| 2026-07-13 | CES244D | - | Jul 13, 12:10 UTC | Jul 14, 09:10 UTC | 21h 0m |
| 2026-07-12 | CES243 | - | Jul 12, 20:05 UTC | Jul 13, 06:15 UTC | 10h 10m |
| 2026-07-12 | CES243 | - | Jul 12, 05:25 UTC | Jul 13, 04:15 UTC | 22h 50m |
| 2026-07-12 | CES243 | - | Jul 12, 03:01 UTC | Jul 13, 02:15 UTC | 23h 15m |
| 2026-07-11 | CES6049 | - | Jul 11, 06:20 UTC | Jul 11, 09:10 UTC | 2h 50m |
| 2026-07-10 | CES6049 | - | Jul 10, 12:20 UTC | Jul 11, 09:10 UTC | 20h 50m |
| 2026-07-10 | CES218 | - | Jul 10, 10:20 UTC | Jul 11, 09:10 UTC | 22h 50m |
| 2026-07-10 | CES218 | - | Jul 10, 10:10 UTC | Jul 11, 06:40 UTC | 20h 30m |
| 2026-07-09 | CES217 | - | Jul 9, 22:40 UTC | Jul 10, 05:45 UTC | 7h 5m |
| 2026-07-08 | CES250 | BCN → PVG | Jul 8, 09:25 UTC | Jul 8, 14:05 UTC | 4h 40m |
| 2026-07-07 | CES249 | PVG → BCN | Jul 7, 12:20 UTC | Jul 8, 05:30 UTC | 17h 10m |
| 2026-07-07 | CES249 | PVG → BCN | Jul 7, 08:50 UTC | Jul 8, 05:30 UTC | 20h 40m |
| 2026-07-06 | CES244 | MXP → PVG | Jul 6, 18:30 UTC | Jul 7, 13:25 UTC | 18h 55m |
| 2026-07-06 | CES244 | MXP → PVG | Jul 6, 16:20 UTC | Jul 7, 13:25 UTC | 21h 5m |
| 2026-07-06 | CES244 | MXP → PVG | Jul 6, 14:20 UTC | Jul 7, 13:25 UTC | 23h 5m |
| 2026-07-06 | CES244 | MXP → PVG | Jul 6, 12:45 UTC | Jul 7, 09:05 UTC | 20h 20m |
| 2026-07-05 | CES243 | PVG → MXP | Jul 5, 22:50 UTC | Jul 6, 05:50 UTC | 7h 0m |
| 2026-07-05 | CES243 | PVG → MXP | Jul 5, 05:10 UTC | Jul 6, 04:15 UTC | 23h 5m |
| 2026-07-05 | CES7236 | - | Jul 5, 02:40 UTC | Jul 6, 02:10 UTC | 23h 30m |
| 2026-07-05 | CES7236 | - | Jul 5, 00:20 UTC | Jul 5, 23:35 UTC | 23h 15m |
| 2026-07-04 | CES7236 | - | Jul 4, 22:35 UTC | Jul 5, 05:55 UTC | 7h 20m |
| 2026-07-04 | CES7235 | - | Jul 4, 08:15 UTC | Jul 4, 18:55 UTC | 10h 40m |
| 2026-07-03 | CES7235 | - | Jul 3, 17:10 UTC | Jul 4, 14:50 UTC | 21h 40m |
| 2026-07-03 | CES244 | MXP → PVG | Jul 3, 12:20 UTC | Jul 4, 11:55 UTC | 23h 35m |
| 2026-07-03 | CES244 | MXP → PVG | Jul 3, 11:40 UTC | Jul 4, 08:30 UTC | 20h 50m |
| 2026-07-02 | CES243 | PVG → MXP | Jul 2, 11:45 UTC | Jul 3, 05:55 UTC | 18h 10m |
| 2026-07-02 | CES243 | PVG → MXP | Jul 2, 09:15 UTC | Jul 3, 05:55 UTC | 20h 40m |
| 2026-07-02 | CES567 | - | Jul 2, 06:55 UTC | Jul 2, 07:15 UTC | 20m |
| 2026-07-01 | CES522 | - | Jul 1, 10:20 UTC | Jul 2, 04:20 UTC | 18h 0m |
| 2026-07-01 | CES522 | - | Jul 1, 10:00 UTC | Jul 2, 04:20 UTC | 18h 20m |
| 2026-07-01 | CES521 | - | Jul 1, 06:40 UTC | Jul 1, 08:15 UTC | 1h 35m |
| 2026-06-29 | CES250 | BCN → PVG | Jun 29, 10:20 UTC | Jun 29, 17:45 UTC | 7h 25m |
| 2026-06-28 | CES249 | PVG → BCN | Jun 28, 10:55 UTC | Jun 29, 05:15 UTC | 18h 20m |
| 2026-06-28 | CES249 | PVG → BCN | Jun 28, 08:39 UTC | Jun 29, 05:15 UTC | 20h 35m |
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-304N page for operator, model, and routing details .