sensors Mode-S transponder
782122
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-656Y · COMAC ARJ-21-700 Xiangfeng
- Hex
- 782122
- Octal
- 36020442
- Decimal
- 7,872,802
- Country
- CN
- Tail
- B-656Y
- Type
- AJ27
- Flights observed
- 18
- Distinct callsigns
- 12
- Country
- CN
- Last broadcast
- Jul 22, 11:40 UTC
Last known position
Country allocation
The ICAO 24-bit address 782122 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 |
|---|---|---|---|
| CES9129 | - | 3 | 2026-07-21 |
| CES9147 | China Eastern Airlines | 2 | 2026-07-22 |
| CES9128 | - | 2 | 2026-07-19 |
| CES9127 | - | 2 | 2026-07-19 |
| CES9148 | China Eastern Airlines | 1 | 2026-05-25 |
| CES9138 | - | 1 | 2026-05-29 |
| CES9132 | - | 1 | 2026-06-30 |
| CES9131 | - | 1 | 2026-06-04 |
| CES9119 | - | 1 | 2026-07-16 |
| CES9114 | China Eastern Airlines | 1 | 2026-06-24 |
| CES7567 | - | 1 | 2026-07-14 |
| CES7565 | - | 1 | 2026-07-15 |
Recent flights last 18
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-22 | CES9147 | PVG → NDG | Jul 22, 02:25 UTC | Jul 22, 11:40 UTC | 9h 15m |
| 2026-07-21 | CES9129 | - | Jul 21, 01:35 UTC | Jul 21, 04:40 UTC | 3h 5m |
| 2026-07-20 | CES9129 | - | Jul 20, 04:35 UTC | Jul 21, 04:30 UTC | 23h 55m |
| 2026-07-20 | CES9129 | - | Jul 20, 04:20 UTC | Jul 21, 02:00 UTC | 21h 40m |
| 2026-07-19 | CES9128 | - | Jul 19, 09:50 UTC | Jul 20, 02:40 UTC | 16h 50m |
| 2026-07-19 | CES9127 | - | Jul 19, 07:20 UTC | Jul 20, 02:40 UTC | 19h 20m |
| 2026-07-18 | CES9127 | - | Jul 18, 23:05 UTC | Jul 19, 10:10 UTC | 11h 5m |
| 2026-07-16 | CES9119 | - | Jul 16, 04:45 UTC | Jul 16, 05:10 UTC | 25m |
| 2026-07-15 | CES7565 | - | Jul 15, 08:50 UTC | Jul 15, 09:10 UTC | 20m |
| 2026-07-14 | CES7567 | - | Jul 14, 06:35 UTC | Jul 14, 06:55 UTC | 20m |
| 2026-06-30 | CES9132 | - | Jun 30, 05:35 UTC | Jun 30, 05:50 UTC | 15m |
| 2026-06-24 | CES9114 | TAO → DSN | Jun 24, 08:30 UTC | Jun 24, 08:39 UTC | 10m |
| 2026-06-05 | CES9128 | - | Jun 5, 08:30 UTC | Jun 5, 10:55 UTC | 2h 25m |
| 2026-06-04 | CES9131 | - | Jun 4, 01:55 UTC | Jun 4, 06:40 UTC | 4h 45m |
| 2026-05-29 | CES9138 | - | May 29, 11:00 UTC | May 29, 11:30 UTC | 30m |
| 2026-05-27 | CES9147 | PVG → NDG | May 27, 00:19 UTC | May 27, 00:30 UTC | 10m |
| 2026-05-26 | - | - | May 26, 05:34 UTC | May 26, 05:49 UTC | 15m |
| 2026-05-25 | CES9148 | NDG → PVG | May 25, 04:20 UTC | May 25, 10:35 UTC | 6h 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-656Y page for operator, model, and routing details .