sensors Mode-S transponder
7821EF
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32KM · AIRBUS A-320neo
- Hex
- 7821EF
- Octal
- 36020757
- Decimal
- 7,873,007
- Country
- CN
- Tail
- B-32KM
- Type
- A20N
- Flights observed
- 55
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 7d ago
Last known position
Country allocation
The ICAO 24-bit address 7821EF 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 |
|---|---|---|---|
| CES891 | - | 4 | 2026-07-05 |
| CES5652 | - | 3 | 2026-07-05 |
| CES5158 | China Eastern Airlines | 3 | 2026-06-09 |
| CES509 | - | 3 | 2026-07-01 |
| CES2018 | China Eastern Airlines | 3 | 2026-06-14 |
| CES2017 | - | 3 | 2026-06-14 |
| CES892 | - | 2 | 2026-07-05 |
| CES6294 | - | 2 | 2026-06-25 |
| CES5620 | - | 2 | 2026-06-30 |
| CES5325 | China Eastern Airlines | 2 | 2026-05-29 |
| CES5100 | China Eastern Airlines | 2 | 2026-06-08 |
| CES510 | - | 2 | 2026-07-01 |
| CES5067 | - | 2 | 2026-07-03 |
| CES294 | China Eastern Airlines | 2 | 2026-05-18 |
| CES293 | China Eastern Airlines | 2 | 2026-05-17 |
| CES726 | China Eastern Airlines | 1 | 2026-07-01 |
| CES725 | - | 1 | 2026-07-01 |
| CES6608 | - | 1 | 2026-07-10 |
| CES6355 | China Eastern Airlines | 1 | 2026-05-24 |
| CES6350 | - | 1 | 2026-06-29 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-10 | CES6608 | - | Jul 10, 23:55 UTC | Jul 11, 02:55 UTC | 3h 0m |
| 2026-07-07 | CES5398 | - | Jul 7, 16:00 UTC | Jul 8, 01:10 UTC | 9h 10m |
| 2026-07-05 | CES5652 | - | Jul 5, 11:05 UTC | Jul 6, 07:25 UTC | 20h 20m |
| 2026-07-05 | CES892 | - | Jul 5, 06:50 UTC | Jul 5, 11:40 UTC | 4h 50m |
| 2026-07-05 | CES891 | - | Jul 5, 05:00 UTC | Jul 5, 05:20 UTC | 20m |
| 2026-07-04 | CES5152 | - | Jul 4, 00:45 UTC | Jul 4, 00:55 UTC | 10m |
| 2026-07-03 | CES5067 | - | Jul 3, 06:40 UTC | Jul 3, 07:10 UTC | 30m |
| 2026-07-01 | CES726 | HKG → PVG | Jul 1, 23:35 UTC | Jul 2, 00:50 UTC | 1h 15m |
| 2026-07-01 | CES725 | - | Jul 1, 15:00 UTC | Jul 1, 15:15 UTC | 15m |
| 2026-07-01 | CES510 | - | Jul 1, 09:15 UTC | Jul 1, 14:10 UTC | 4h 55m |
| 2026-07-01 | CES509 | - | Jul 1, 07:25 UTC | Jul 1, 07:40 UTC | 15m |
| 2026-06-30 | CES509 | - | Jun 30, 23:50 UTC | Jul 1, 06:55 UTC | 7h 5m |
| 2026-06-30 | CES5620 | - | Jun 30, 07:30 UTC | Jul 1, 00:40 UTC | 17h 10m |
| 2026-06-30 | CES5620 | - | Jun 30, 03:50 UTC | Jul 1, 00:40 UTC | 20h 50m |
| 2026-06-30 | CES5373 | - | Jun 30, 03:35 UTC | Jul 1, 00:40 UTC | 21h 5m |
| 2026-06-29 | CES6350 | - | Jun 29, 00:39 UTC | Jun 29, 01:05 UTC | 25m |
| 2026-06-26 | CES6311 | - | Jun 26, 18:04 UTC | Jun 26, 18:20 UTC | 15m |
| 2026-06-25 | CES6294 | - | Jun 25, 11:30 UTC | Jun 25, 11:59 UTC | 30m |
| 2026-06-24 | CES5652 | - | Jun 24, 12:44 UTC | Jun 25, 11:39 UTC | 22h 55m |
| 2026-06-24 | CES5652 | - | Jun 24, 08:04 UTC | Jun 24, 13:20 UTC | 5h 15m |
| 2026-06-24 | CES891 | - | Jun 24, 06:20 UTC | Jun 24, 06:39 UTC | 20m |
| 2026-06-24 | CES891 | - | Jun 24, 05:40 UTC | Jun 24, 05:49 UTC | 10m |
| 2026-06-23 | CES5068 | - | Jun 23, 08:15 UTC | Jun 24, 05:49 UTC | 21h 35m |
| 2026-06-23 | CES5067 | - | Jun 23, 06:19 UTC | Jun 23, 06:55 UTC | 35m |
| 2026-06-19 | CES6263 | LHW → TSN | Jun 19, 13:54 UTC | Jun 19, 14:15 UTC | 20m |
| 2026-06-14 | CES2018 | ICN → WEH | Jun 14, 05:25 UTC | Jun 14, 05:45 UTC | 20m |
| 2026-06-14 | CES2017 | - | Jun 14, 03:25 UTC | Jun 14, 03:50 UTC | 25m |
| 2026-06-13 | CES2018 | ICN → WEH | Jun 13, 05:40 UTC | Jun 13, 05:55 UTC | 15m |
| 2026-06-13 | CES2017 | - | Jun 13, 03:30 UTC | Jun 13, 03:50 UTC | 20m |
| 2026-06-12 | CES2018 | ICN → WEH | Jun 12, 05:45 UTC | Jun 12, 06:05 UTC | 20m |
| 2026-06-12 | CES2017 | WEH → ICN | Jun 12, 03:30 UTC | Jun 12, 03:50 UTC | 20m |
| 2026-06-09 | CES5158 | PEK → PVG | Jun 9, 06:45 UTC | Jun 9, 06:55 UTC | 10m |
| 2026-06-08 | CES5100 | PEK → PVG | Jun 8, 23:15 UTC | Jun 8, 23:25 UTC | 10m |
| 2026-05-29 | CES5325 | SHA → SZX | May 29, 18:30 UTC | May 29, 18:40 UTC | 10m |
| 2026-05-29 | CES5053 | PVG → TAE | May 29, 01:45 UTC | May 29, 02:00 UTC | 15m |
| 2026-05-26 | CES5326 | CSX → HGH | May 26, 23:49 UTC | May 27, 00:00 UTC | 10m |
| 2026-05-24 | CES6355 | SHA → CGQ | May 24, 09:55 UTC | May 24, 10:20 UTC | 25m |
| 2026-05-19 | CES5158 | PEK → PVG | May 19, 06:50 UTC | May 19, 07:00 UTC | 10m |
| 2026-05-18 | CES294 | HIJ → PVG | May 18, 04:51 UTC | May 18, 05:20 UTC | 30m |
| 2026-05-17 | CES293 | PVG → HIJ | May 17, 11:10 UTC | May 18, 03:35 UTC | 16h 25m |
| 2026-05-14 | CES6294 | DQA → PVG | May 14, 11:30 UTC | May 14, 12:05 UTC | 35m |
| 2026-05-13 | CES510 | HKG → PVG | May 13, 09:25 UTC | May 13, 10:35 UTC | 1h 10m |
| 2026-05-13 | CES509 | PVG → HKG | May 13, 05:50 UTC | May 13, 07:25 UTC | 1h 35m |
| 2026-05-11 | CES294 | HIJ → PVG | May 11, 04:40 UTC | May 11, 05:10 UTC | 30m |
| 2026-05-11 | CES293 | PVG → HIJ | May 11, 02:40 UTC | May 11, 03:10 UTC | 30m |
| 2026-05-09 | CES5325 | SHA → SZX | May 9, 16:25 UTC | May 9, 16:35 UTC | 10m |
| 2026-05-09 | CES892 | ICN → YNJ | May 9, 06:45 UTC | May 9, 11:20 UTC | 4h 35m |
| 2026-05-09 | CES891 | YNJ → ICN | May 9, 05:05 UTC | May 9, 05:25 UTC | 20m |
| 2026-05-07 | CES5158 | PEK → PVG | May 7, 06:55 UTC | May 7, 13:25 UTC | 6h 30m |
| 2026-05-06 | CES5100 | PEK → PVG | May 6, 23:15 UTC | May 6, 23:25 UTC | 10m |
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-32KM page for operator, model, and routing details .