sensors Mode-S transponder
781AA6
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-321J · AIRBUS A-350-900
- Hex
- 781AA6
- Octal
- 36015246
- Decimal
- 7,871,142
- Country
- CN
- Tail
- B-321J
- Type
- A359
- Flights observed
- 181
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 3h ago
Current position
Country allocation
The ICAO 24-bit address 781AA6 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 |
|---|---|---|---|
| CES709 | - | 14 | 2026-07-13 |
| CES217 | - | 13 | 2026-06-16 |
| CES262 | - | 10 | 2026-07-01 |
| CES218 | - | 10 | 2026-06-17 |
| CES785 | China Eastern Airlines | 9 | 2026-07-02 |
| CES786 | - | 8 | 2026-07-03 |
| CES710 | - | 8 | 2026-07-14 |
| CES567 | - | 8 | 2026-07-11 |
| CES223 | China Eastern Airlines | 8 | 2026-05-22 |
| CES562 | China Eastern Airlines | 7 | 2026-06-02 |
| CES249 | - | 7 | 2026-07-08 |
| CES244 | - | 7 | 2026-07-13 |
| CES787 | China Eastern Airlines | 6 | 2026-05-17 |
| CES243 | China Eastern Airlines | 6 | 2026-07-06 |
| CES7235 | China Eastern Airlines | 5 | 2026-06-06 |
| CES581 | - | 5 | 2026-06-29 |
| CES568 | - | 5 | 2026-07-11 |
| CES261 | - | 5 | 2026-07-01 |
| CES751 | - | 4 | 2026-07-05 |
| CES735 | China Eastern Airlines | 4 | 2026-05-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | CES710 | - | Jul 14, 09:35 UTC | Jul 14, 13:25 UTC | 3h 50m |
| 2026-07-13 | CES709 | - | Jul 13, 18:50 UTC | Jul 14, 05:50 UTC | 11h 0m |
| 2026-07-13 | CES709 | - | Jul 13, 07:35 UTC | Jul 14, 05:50 UTC | 22h 15m |
| 2026-07-13 | CES709 | - | Jul 13, 07:20 UTC | Jul 14, 05:30 UTC | 22h 10m |
| 2026-07-13 | CES709 | - | Jul 13, 03:40 UTC | Jul 14, 03:30 UTC | 23h 50m |
| 2026-07-13 | CES244 | - | Jul 13, 01:35 UTC | Jul 14, 01:10 UTC | 23h 35m |
| 2026-07-12 | CES243D | - | Jul 12, 13:01 UTC | Jul 12, 23:15 UTC | 10h 15m |
| 2026-07-11 | CES568 | - | Jul 11, 09:40 UTC | Jul 11, 12:20 UTC | 2h 40m |
| 2026-07-11 | CES567 | - | Jul 11, 04:15 UTC | Jul 11, 07:50 UTC | 3h 35m |
| 2026-07-09 | CES250 | - | Jul 9, 09:25 UTC | Jul 9, 16:45 UTC | 7h 20m |
| 2026-07-08 | CES249 | - | Jul 8, 21:40 UTC | Jul 9, 05:10 UTC | 7h 30m |
| 2026-07-08 | CES249 | - | Jul 8, 07:35 UTC | Jul 9, 05:10 UTC | 21h 35m |
| 2026-07-08 | CES249 | - | Jul 8, 03:35 UTC | Jul 9, 03:30 UTC | 23h 55m |
| 2026-07-08 | CES249 | - | Jul 8, 03:20 UTC | Jul 9, 01:25 UTC | 22h 5m |
| 2026-07-07 | CES244 | MXP → PVG | Jul 7, 13:35 UTC | Jul 8, 08:20 UTC | 18h 45m |
| 2026-07-07 | CES244 | MXP → PVG | Jul 7, 11:50 UTC | Jul 8, 08:20 UTC | 20h 30m |
| 2026-07-06 | CES243 | PVG → MXP | Jul 6, 22:25 UTC | Jul 7, 05:30 UTC | 7h 5m |
| 2026-07-06 | CES243 | PVG → MXP | Jul 6, 02:05 UTC | Jul 7, 01:30 UTC | 23h 25m |
| 2026-07-05 | CES752 | - | Jul 5, 19:55 UTC | Jul 6, 02:45 UTC | 6h 50m |
| 2026-07-05 | CES751 | - | Jul 5, 05:20 UTC | Jul 5, 15:35 UTC | 10h 15m |
| 2026-07-04 | CES751 | - | Jul 4, 15:00 UTC | Jul 5, 12:10 UTC | 21h 10m |
| 2026-07-04 | CES6050 | - | Jul 4, 11:55 UTC | Jul 5, 11:30 UTC | 23h 35m |
| 2026-07-03 | CES6049 | - | Jul 3, 15:35 UTC | Jul 4, 10:15 UTC | 18h 40m |
| 2026-07-03 | CES786 | - | Jul 3, 11:35 UTC | Jul 4, 10:15 UTC | 22h 40m |
| 2026-07-03 | CES786 | - | Jul 3, 09:50 UTC | Jul 4, 07:25 UTC | 21h 35m |
| 2026-07-02 | CES785 | PVG → VCE | Jul 2, 19:10 UTC | Jul 3, 05:25 UTC | 10h 15m |
| 2026-07-02 | CES785 | PVG → VCE | Jul 2, 03:40 UTC | Jul 3, 03:30 UTC | 23h 50m |
| 2026-07-02 | CES785 | PVG → VCE | Jul 2, 01:35 UTC | Jul 3, 01:30 UTC | 23h 55m |
| 2026-07-01 | CES262 | - | Jul 1, 23:35 UTC | Jul 2, 23:00 UTC | 23h 25m |
| 2026-07-01 | CES262 | - | Jul 1, 21:35 UTC | Jul 2, 19:25 UTC | 21h 50m |
| 2026-07-01 | CES262 | - | Jul 1, 20:45 UTC | Jul 2, 19:25 UTC | 22h 40m |
| 2026-07-01 | CES261 | - | Jul 1, 09:15 UTC | Jul 1, 17:30 UTC | 8h 15m |
| 2026-06-29 | CES582 | - | Jun 29, 20:04 UTC | Jun 30, 06:25 UTC | 10h 21m |
| 2026-06-29 | CES581 | - | Jun 29, 06:24 UTC | Jun 29, 15:14 UTC | 8h 50m |
| 2026-06-28 | CES581 | - | Jun 28, 17:50 UTC | Jun 29, 15:14 UTC | 21h 25m |
| 2026-06-28 | CES244 | MXP → PVG | Jun 28, 13:34 UTC | Jun 29, 07:55 UTC | 18h 20m |
| 2026-06-28 | CES244 | MXP → PVG | Jun 28, 11:50 UTC | Jun 29, 07:55 UTC | 20h 5m |
| 2026-06-27 | CES243 | PVG → MXP | Jun 27, 19:19 UTC | Jun 28, 05:09 UTC | 9h 50m |
| 2026-06-26 | CES250 | BCN → PVG | Jun 26, 09:35 UTC | Jun 26, 17:09 UTC | 7h 35m |
| 2026-06-25 | CES249 | PVG → BCN | Jun 25, 18:15 UTC | Jun 26, 04:50 UTC | 10h 35m |
| 2026-06-24 | CES710 | - | Jun 24, 09:19 UTC | Jun 24, 17:10 UTC | 7h 50m |
| 2026-06-23 | CES709 | PVG → MAD | Jun 23, 18:25 UTC | Jun 24, 05:09 UTC | 10h 45m |
| 2026-06-22 | CES250 | BCN → PVG | Jun 22, 09:30 UTC | Jun 22, 17:04 UTC | 7h 35m |
| 2026-06-21 | CES249 | PVG → BCN | Jun 21, 18:20 UTC | Jun 22, 04:59 UTC | 10h 40m |
| 2026-06-20 | CES262 | - | Jun 20, 20:40 UTC | Jun 21, 04:14 UTC | 7h 35m |
| 2026-06-20 | CES261 | - | Jun 20, 05:39 UTC | Jun 20, 16:44 UTC | 11h 5m |
| 2026-06-18 | CES582 | - | Jun 18, 20:05 UTC | Jun 19, 06:54 UTC | 10h 49m |
| 2026-06-18 | CES581 | - | Jun 18, 06:35 UTC | Jun 18, 16:05 UTC | 9h 30m |
| 2026-06-17 | CES581 | - | Jun 17, 16:15 UTC | Jun 18, 15:30 UTC | 23h 15m |
| 2026-06-17 | CES581 | - | Jun 17, 13:40 UTC | Jun 18, 08:10 UTC | 18h 30m |
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-321J page for operator, model, and routing details .