sensors Mode-S transponder
7821F4
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32KS · AIRBUS A-320neo
- Hex
- 7821F4
- Octal
- 36020764
- Decimal
- 7,873,012
- Country
- CN
- Tail
- B-32KS
- Type
- A20N
- Flights observed
- 42
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 2d ago
Last known position
Country allocation
The ICAO 24-bit address 7821F4 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 |
|---|---|---|---|
| CQH8892 | Spring Airlines | 3 | 2026-04-15 |
| CQH8891 | Spring Airlines | 2 | 2026-04-15 |
| CQH8598 | Spring Airlines | 2 | 2026-04-20 |
| CQH8522 | Spring Airlines | 2 | 2026-05-27 |
| CQH6566 | - | 2 | 2026-04-13 |
| CQH8934 | Spring Airlines | 1 | 2026-05-21 |
| CQH8933 | Spring Airlines | 1 | 2026-05-21 |
| CQH8597 | Spring Airlines | 1 | 2026-04-20 |
| CQH8552 | Spring Airlines | 1 | 2026-05-01 |
| CQH8551 | Spring Airlines | 1 | 2026-05-01 |
| CQH8511 | Spring Airlines | 1 | 2026-05-21 |
| CQH7596 | Spring Airlines | 1 | 2026-04-25 |
| CQH7595 | Spring Airlines | 1 | 2026-04-25 |
| CQH7281 | Spring Airlines | 1 | 2026-05-01 |
| CQH7091 | Spring Airlines | 1 | 2026-05-03 |
| CQH7057 | Spring Airlines | 1 | 2026-04-20 |
| CQH7050 | Spring Airlines | 1 | 2026-05-24 |
| CQH7049 | Spring Airlines | 1 | 2026-05-24 |
| CQH6908 | Spring Airlines | 1 | 2026-04-24 |
| CQH6900 | Spring Airlines | 1 | 2026-04-14 |
Recent flights last 42
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-27 | CQH8522 | HKT → PVG | May 27, 12:20 UTC | May 27, 20:45 UTC | 8h 25m |
| 2026-05-24 | CQH7050 | CJJ → PVG | May 24, 03:05 UTC | May 24, 03:30 UTC | 25m |
| 2026-05-24 | CQH7049 | PVG → CJJ | May 24, 01:35 UTC | May 24, 02:00 UTC | 25m |
| 2026-05-22 | CQH6218 | NRT → PVG | May 22, 11:35 UTC | May 22, 12:45 UTC | 1h 10m |
| 2026-05-22 | CQH6217 | PVG → NRT | May 22, 02:00 UTC | May 22, 09:35 UTC | 7h 35m |
| 2026-05-21 | CQH8933 | CAN → CNX | May 21, 22:40 UTC | May 22, 01:00 UTC | 2h 20m |
| 2026-05-21 | CQH8934 | CNX → CAN | May 21, 14:35 UTC | May 21, 14:50 UTC | 15m |
| 2026-05-21 | CQH8511 | PVG → CNX | May 21, 05:05 UTC | May 21, 13:25 UTC | 8h 20m |
| 2026-05-17 | CQH6838 | ZUH → LHW | May 17, 03:30 UTC | May 17, 03:40 UTC | 10m |
| 2026-05-10 | CQH6538 | FUK → PVG | May 10, 09:00 UTC | May 10, 09:10 UTC | 10m |
| 2026-05-10 | CQH6537 | PVG → FUK | May 10, 07:19 UTC | May 10, 07:30 UTC | 10m |
| 2026-05-09 | CQH6826 | - | May 9, 10:45 UTC | May 10, 03:00 UTC | 16h 15m |
| 2026-05-09 | CQH6825 | - | May 9, 06:55 UTC | May 9, 09:20 UTC | 2h 25m |
| 2026-05-05 | CQH6628 | CNX → XIY | May 5, 14:45 UTC | May 5, 15:01 UTC | 15m |
| 2026-05-05 | CQH6627 | XIY → CNX | May 5, 12:55 UTC | May 5, 13:15 UTC | 20m |
| 2026-05-05 | CQH6836 | ZUH → KHN | May 5, 03:55 UTC | May 5, 04:10 UTC | 15m |
| 2026-05-04 | CQH6600 | KHN → HRB | May 4, 10:15 UTC | May 4, 14:20 UTC | 4h 5m |
| 2026-05-03 | CQH7091 | SJW → ZQZ | May 3, 09:50 UTC | May 3, 10:05 UTC | 15m |
| 2026-05-01 | CQH8552 | SIN → PVG | May 1, 22:25 UTC | May 2, 02:10 UTC | 3h 45m |
| 2026-05-01 | CQH8551 | PVG → SIN | May 1, 09:55 UTC | May 1, 20:50 UTC | 10h 55m |
| 2026-05-01 | CQH7281 | PVG → BKK | May 1, 06:00 UTC | May 1, 08:25 UTC | 2h 25m |
| 2026-04-27 | CQH6887 | SHE → TYN | Apr 27, 12:10 UTC | Apr 27, 12:20 UTC | 10m |
| 2026-04-26 | CQH6182 | ICN → YTY | Apr 26, 11:45 UTC | Apr 26, 12:10 UTC | 25m |
| 2026-04-25 | CQH7596 | ZUH → YTY | Apr 25, 06:50 UTC | Apr 25, 07:00 UTC | 10m |
| 2026-04-25 | CQH7595 | YTY → ZUH | Apr 25, 04:30 UTC | Apr 25, 04:50 UTC | 20m |
| 2026-04-24 | CQH6908 | HFE → SHE | Apr 24, 15:25 UTC | Apr 24, 15:35 UTC | 10m |
| 2026-04-21 | CQH8522 | HKT → PVG | Apr 21, 02:00 UTC | Apr 21, 19:45 UTC | 17h 45m |
| 2026-04-20 | CQH7057 | PVG → UBN | Apr 20, 11:55 UTC | Apr 21, 06:40 UTC | 18h 45m |
| 2026-04-20 | CQH8598 | HKG → PVG | Apr 20, 09:05 UTC | Apr 21, 06:40 UTC | 21h 35m |
| 2026-04-20 | CQH8598 | HKG → PVG | Apr 20, 08:45 UTC | Apr 21, 06:40 UTC | 21h 55m |
| 2026-04-20 | CQH8597 | PVG → HKG | Apr 20, 03:25 UTC | Apr 20, 07:00 UTC | 3h 35m |
| 2026-04-16 | CQH6300 | - | Apr 16, 12:49 UTC | Apr 16, 13:05 UTC | 15m |
| 2026-04-16 | CQH6299 | XIY → BKK | Apr 16, 10:34 UTC | Apr 16, 11:04 UTC | 30m |
| 2026-04-15 | CQH8892 | BKK → PVG | Apr 15, 09:05 UTC | Apr 15, 09:15 UTC | 10m |
| 2026-04-15 | CQH8892 | BKK → PVG | Apr 15, 08:10 UTC | Apr 15, 08:55 UTC | 45m |
| 2026-04-15 | CQH8892 | BKK → PVG | Apr 15, 06:05 UTC | Apr 15, 06:35 UTC | 30m |
| 2026-04-15 | CQH8891 | PVG → BKK | Apr 15, 04:15 UTC | Apr 15, 04:50 UTC | 35m |
| 2026-04-15 | CQH8891 | PVG → BKK | Apr 15, 02:25 UTC | Apr 15, 02:45 UTC | 20m |
| 2026-04-14 | CQH6900 | PUS → PVG | Apr 14, 13:30 UTC | Apr 14, 13:40 UTC | 10m |
| 2026-04-13 | CQH6566 | - | Apr 13, 08:20 UTC | Apr 13, 08:50 UTC | 30m |
| 2026-04-13 | CQH6566 | - | Apr 13, 08:05 UTC | Apr 13, 08:15 UTC | 10m |
| 2026-04-13 | CQH6565 | PVG → KIX | Apr 13, 05:55 UTC | Apr 13, 06:20 UTC | 25m |
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-32KS page for operator, model, and routing details .