sensors Mode-S transponder
780D9D
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-2021 · BOEING 777-300ER
- Hex
- 780D9D
- Octal
- 36006635
- Decimal
- 7,867,805
- Country
- CN
- Tail
- B-2021
- Type
- B77W
- Flights observed
- 162
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- Jul 26, 18:55 UTC
Last known position
Country allocation
The ICAO 24-bit address 780D9D 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 |
|---|---|---|---|
| CES771 | - | 25 | 2026-07-06 |
| CES551 | - | 23 | 2026-06-24 |
| CES772 | - | 21 | 2026-07-07 |
| CES552 | China Eastern Airlines | 17 | 2026-06-24 |
| CES220 | - | 9 | 2026-06-23 |
| CES570 | - | 7 | 2026-07-09 |
| CES554 | China Eastern Airlines | 7 | 2026-05-19 |
| CES219 | China Eastern Airlines | 7 | 2026-07-26 |
| CES576 | China Eastern Airlines | 6 | 2026-06-29 |
| CES569 | - | 6 | 2026-07-09 |
| CES553 | China Eastern Airlines | 6 | 2026-05-18 |
| CES5126 | China Eastern Airlines | 5 | 2026-07-24 |
| CES575 | China Eastern Airlines | 4 | 2026-05-26 |
| CES5110 | China Eastern Airlines | 4 | 2026-07-24 |
| CES779 | - | 3 | 2026-06-20 |
| CES780 | - | 2 | 2026-06-20 |
| CES5166 | China Eastern Airlines | 2 | 2026-07-21 |
| CES202 | China Eastern Airlines | 2 | 2026-04-28 |
| CES5376 | - | 1 | 2026-07-14 |
| CES5375 | - | 1 | 2026-07-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CES219 | PVG → FRA | Jul 26, 18:40 UTC | Jul 26, 18:55 UTC | 15m |
| 2026-07-24 | CES5126 | PEK → SHA | Jul 24, 12:25 UTC | Jul 24, 12:55 UTC | 30m |
| 2026-07-24 | CES5110 | PEK → SHA | Jul 24, 04:15 UTC | Jul 24, 04:30 UTC | 15m |
| 2026-07-22 | CES5375 | - | Jul 22, 10:20 UTC | Jul 22, 14:35 UTC | 4h 15m |
| 2026-07-21 | CES5166 | PEK → SHA | Jul 21, 14:05 UTC | Jul 22, 10:25 UTC | 20h 20m |
| 2026-07-21 | CES5114 | - | Jul 21, 06:25 UTC | Jul 21, 06:35 UTC | 10m |
| 2026-07-20 | CES5126 | PEK → SHA | Jul 20, 13:40 UTC | Jul 20, 13:55 UTC | 15m |
| 2026-07-20 | CES5112 | PEK → SHA | Jul 20, 06:20 UTC | Jul 20, 06:35 UTC | 15m |
| 2026-07-19 | CES5105 | SHA → PEK | Jul 19, 04:00 UTC | Jul 19, 04:10 UTC | 10m |
| 2026-07-18 | CES5166 | - | Jul 18, 14:50 UTC | Jul 18, 15:00 UTC | 10m |
| 2026-07-16 | CES5126 | - | Jul 16, 12:14 UTC | Jul 16, 12:25 UTC | 10m |
| 2026-07-16 | CES5110 | - | Jul 16, 04:20 UTC | Jul 16, 04:30 UTC | 10m |
| 2026-07-15 | CES5110 | - | Jul 15, 04:15 UTC | Jul 15, 04:25 UTC | 10m |
| 2026-07-14 | CES5376 | - | Jul 14, 10:40 UTC | Jul 14, 14:00 UTC | 3h 20m |
| 2026-07-12 | CES5126 | - | Jul 12, 12:20 UTC | Jul 12, 12:30 UTC | 10m |
| 2026-07-12 | CES5110 | - | Jul 12, 05:30 UTC | Jul 12, 05:40 UTC | 10m |
| 2026-07-10 | CES5126 | - | Jul 10, 14:20 UTC | Jul 10, 14:30 UTC | 10m |
| 2026-07-09 | CES570 | - | Jul 9, 21:25 UTC | Jul 10, 04:00 UTC | 6h 35m |
| 2026-07-09 | CES569 | HND → CDG | Jul 9, 00:35 UTC | Jul 9, 19:05 UTC | 18h 30m |
| 2026-07-07 | CES772 | - | Jul 7, 20:30 UTC | Jul 8, 12:00 UTC | 15h 30m |
| 2026-07-06 | CES771 | - | Jul 6, 23:45 UTC | Jul 7, 18:00 UTC | 18h 15m |
| 2026-07-06 | CES771 | - | Jul 6, 19:20 UTC | Jul 7, 18:00 UTC | 22h 40m |
| 2026-07-06 | CES772 | - | Jul 6, 18:30 UTC | Jul 7, 17:15 UTC | 22h 45m |
| 2026-07-06 | CES771 | - | Jul 6, 06:20 UTC | Jul 6, 15:45 UTC | 9h 25m |
| 2026-07-04 | CES772 | - | Jul 4, 20:00 UTC | Jul 4, 22:10 UTC | 2h 10m |
| 2026-07-03 | CES771 | - | Jul 3, 20:25 UTC | Jul 4, 14:40 UTC | 18h 15m |
| 2026-07-03 | CES771 | - | Jul 3, 17:30 UTC | Jul 4, 14:40 UTC | 21h 10m |
| 2026-07-02 | CES570 | - | Jul 2, 21:20 UTC | Jul 3, 16:00 UTC | 18h 40m |
| 2026-07-02 | CES570 | - | Jul 2, 20:15 UTC | Jul 3, 16:00 UTC | 19h 45m |
| 2026-07-02 | CES569 | - | Jul 2, 09:50 UTC | Jul 2, 17:10 UTC | 7h 20m |
| 2026-06-29 | CES576 | HND → PVG | Jun 29, 23:54 UTC | Jun 30, 01:25 UTC | 1h 30m |
| 2026-06-28 | CES772 | - | Jun 28, 18:44 UTC | Jun 29, 12:05 UTC | 17h 20m |
| 2026-06-28 | CES771 | - | Jun 28, 00:00 UTC | Jun 28, 12:50 UTC | 12h 50m |
| 2026-06-26 | CES772 | AMS → HND | Jun 26, 18:49 UTC | Jun 27, 12:04 UTC | 17h 15m |
| 2026-06-25 | CES771 | - | Jun 25, 23:59 UTC | Jun 26, 16:30 UTC | 16h 30m |
| 2026-06-24 | CES552 | LHR → PVG | Jun 24, 20:44 UTC | Jun 25, 11:50 UTC | 15h 5m |
| 2026-06-24 | CES551 | - | Jun 24, 10:10 UTC | Jun 24, 16:59 UTC | 6h 50m |
| 2026-06-23 | CES551 | - | Jun 23, 18:20 UTC | Jun 24, 16:59 UTC | 22h 40m |
| 2026-06-23 | CES220 | - | Jun 23, 13:19 UTC | Jun 24, 10:49 UTC | 21h 30m |
| 2026-06-23 | CES220 | - | Jun 23, 12:55 UTC | Jun 24, 10:49 UTC | 21h 55m |
| 2026-06-22 | CES219 | PVG → FRA | Jun 22, 21:25 UTC | Jun 23, 03:39 UTC | 6h 15m |
| 2026-06-21 | CES772 | - | Jun 21, 23:50 UTC | Jun 22, 21:59 UTC | 22h 10m |
| 2026-06-21 | CES772 | - | Jun 21, 18:39 UTC | Jun 22, 00:29 UTC | 5h 50m |
| 2026-06-21 | CES771 | - | Jun 21, 15:19 UTC | Jun 21, 15:49 UTC | 30m |
| 2026-06-20 | CES771 | - | Jun 20, 19:29 UTC | Jun 21, 12:49 UTC | 17h 20m |
| 2026-06-20 | CES780 | - | Jun 20, 09:19 UTC | Jun 21, 06:24 UTC | 21h 5m |
| 2026-06-20 | CES779 | - | Jun 20, 03:04 UTC | Jun 20, 03:39 UTC | 35m |
| 2026-06-18 | CES772 | - | Jun 18, 18:30 UTC | Jun 19, 00:29 UTC | 5h 59m |
| 2026-06-18 | CES771 | - | Jun 18, 09:35 UTC | Jun 18, 15:45 UTC | 6h 10m |
| 2026-06-17 | CES780 | - | Jun 17, 09:25 UTC | Jun 17, 09:40 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-2021 page for operator, model, and routing details .