sensors Mode-S transponder
7817C2
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-30AR · AIRBUS A-320neo
- Hex
- 7817C2
- Octal
- 36013702
- Decimal
- 7,870,402
- Country
- CN
- Tail
- B-30AR
- Type
- A20N
- Flights observed
- 105
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 3h ago
Last known position
Country allocation
The ICAO 24-bit address 7817C2 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 |
|---|---|---|---|
| CQH8521 | Spring Airlines | 5 | 2026-07-04 |
| CQH6921 | Spring Airlines | 5 | 2026-04-23 |
| CQH7285 | - | 4 | 2026-05-08 |
| CQH7282 | - | 4 | 2026-06-27 |
| CQH6922 | Spring Airlines | 4 | 2026-04-23 |
| CQH8549 | Spring Airlines | 3 | 2026-05-07 |
| CQH8522 | - | 3 | 2026-06-17 |
| CQH8511 | - | 3 | 2026-06-28 |
| CQH7281 | - | 3 | 2026-06-27 |
| CQH8934 | - | 2 | 2026-06-28 |
| CQH8875 | Spring Airlines | 2 | 2026-05-05 |
| CQH8779 | - | 2 | 2026-06-13 |
| CQH8550 | Spring Airlines | 2 | 2026-05-07 |
| CQH7420 | Spring Airlines | 2 | 2026-05-08 |
| CQH7419 | Spring Airlines | 2 | 2026-05-09 |
| CQH7348 | Spring Airlines | 2 | 2026-04-22 |
| CQH7286 | Spring Airlines | 2 | 2026-05-10 |
| CQH6775 | - | 2 | 2026-07-17 |
| CQH6732 | - | 2 | 2026-07-14 |
| CQH6731 | - | 2 | 2026-07-14 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | CQH6775 | - | Jul 17, 14:50 UTC | Jul 18, 05:20 UTC | 14h 31m |
| 2026-07-17 | CQH6775 | - | Jul 17, 03:55 UTC | Jul 18, 00:15 UTC | 20h 20m |
| 2026-07-15 | CQH8594 | - | Jul 15, 18:45 UTC | Jul 15, 21:20 UTC | 2h 35m |
| 2026-07-15 | CQH8593 | - | Jul 15, 14:25 UTC | Jul 15, 17:35 UTC | 3h 10m |
| 2026-07-14 | CQH6732 | - | Jul 14, 11:45 UTC | Jul 14, 12:10 UTC | 25m |
| 2026-07-14 | CQH6731 | - | Jul 14, 09:25 UTC | Jul 14, 09:55 UTC | 30m |
| 2026-07-13 | CQH6411 | - | Jul 13, 10:00 UTC | Jul 13, 10:15 UTC | 15m |
| 2026-07-09 | CQH8671 | - | Jul 9, 23:05 UTC | Jul 10, 09:05 UTC | 10h 0m |
| 2026-07-09 | CQH7019 | - | Jul 9, 12:25 UTC | Jul 9, 12:55 UTC | 30m |
| 2026-07-08 | CQH8910 | - | Jul 8, 01:35 UTC | Jul 8, 02:10 UTC | 35m |
| 2026-07-05 | CQH7050 | - | Jul 5, 04:40 UTC | Jul 5, 12:45 UTC | 8h 5m |
| 2026-07-04 | CQH8521 | PVG → HKT | Jul 4, 14:10 UTC | Jul 5, 03:30 UTC | 13h 20m |
| 2026-07-04 | CQH8521 | PVG → HKT | Jul 4, 06:35 UTC | Jul 5, 03:30 UTC | 20h 55m |
| 2026-07-04 | CQH8521 | PVG → HKT | Jul 4, 02:00 UTC | Jul 4, 21:20 UTC | 19h 20m |
| 2026-07-03 | CQH8521 | PVG → HKT | Jul 3, 16:55 UTC | Jul 4, 16:30 UTC | 23h 35m |
| 2026-07-03 | CQH6538 | - | Jul 3, 09:20 UTC | Jul 4, 06:45 UTC | 21h 25m |
| 2026-07-03 | CQH6537 | - | Jul 3, 07:40 UTC | Jul 3, 07:55 UTC | 15m |
| 2026-07-03 | CQH6610 | - | Jul 3, 02:55 UTC | Jul 3, 03:20 UTC | 25m |
| 2026-07-03 | CQH6609 | PVG → FUK | Jul 3, 01:05 UTC | Jul 3, 01:25 UTC | 20m |
| 2026-06-30 | CQH7636 | - | Jun 30, 23:55 UTC | Jul 1, 03:05 UTC | 3h 10m |
| 2026-06-28 | CQH8934 | - | Jun 28, 14:25 UTC | Jun 28, 15:55 UTC | 1h 30m |
| 2026-06-28 | CQH8511 | - | Jun 28, 11:50 UTC | Jun 28, 13:14 UTC | 1h 25m |
| 2026-06-27 | CQH8511 | - | Jun 27, 14:39 UTC | Jun 28, 13:14 UTC | 22h 35m |
| 2026-06-27 | CQH7282 | - | Jun 27, 12:34 UTC | Jun 28, 12:19 UTC | 23h 45m |
| 2026-06-27 | CQH7282 | - | Jun 27, 12:19 UTC | Jun 27, 14:39 UTC | 2h 20m |
| 2026-06-27 | CQH7281 | - | Jun 27, 08:29 UTC | Jun 27, 11:00 UTC | 2h 30m |
| 2026-06-20 | CQH8598 | - | Jun 20, 08:55 UTC | Jun 20, 13:04 UTC | 4h 10m |
| 2026-06-20 | CQH8597 | - | Jun 20, 03:34 UTC | Jun 20, 03:49 UTC | 15m |
| 2026-06-19 | CQH8952 | - | Jun 19, 03:20 UTC | Jun 19, 04:10 UTC | 50m |
| 2026-06-19 | CQH8951 | - | Jun 19, 01:29 UTC | Jun 19, 01:59 UTC | 30m |
| 2026-06-18 | CQH6900 | PUS → PVG | Jun 18, 13:20 UTC | Jun 18, 13:45 UTC | 25m |
| 2026-06-18 | CQH6899 | - | Jun 18, 11:40 UTC | Jun 18, 12:15 UTC | 35m |
| 2026-06-17 | CQH8522 | - | Jun 17, 12:25 UTC | Jun 17, 19:45 UTC | 7h 20m |
| 2026-06-17 | - | - | Jun 17, 05:15 UTC | Jun 17, 05:30 UTC | 15m |
| 2026-06-13 | CQH8779 | - | Jun 13, 11:20 UTC | Jun 14, 05:30 UTC | 18h 11m |
| 2026-06-13 | CQH7282 | BKK → PVG | Jun 13, 09:55 UTC | Jun 14, 05:30 UTC | 19h 35m |
| 2026-06-13 | CQH7281 | - | Jun 13, 06:30 UTC | Jun 13, 08:35 UTC | 2h 5m |
| 2026-06-10 | CQH8936 | CGQ → PVG | Jun 10, 13:05 UTC | Jun 10, 13:35 UTC | 30m |
| 2026-06-08 | CQH7385 | NGB → SYX | Jun 8, 06:05 UTC | Jun 8, 11:05 UTC | 5h 0m |
| 2026-06-03 | CQH6294 | BKK → XIY | Jun 3, 20:15 UTC | Jun 3, 21:15 UTC | 1h 0m |
| 2026-06-03 | CQH6293 | XIY → BKK | Jun 3, 16:25 UTC | Jun 3, 17:20 UTC | 55m |
| 2026-05-27 | CQH6218 | NRT → PVG | May 27, 11:20 UTC | May 27, 12:45 UTC | 1h 25m |
| 2026-05-27 | CQH6217 | PVG → NRT | May 27, 03:34 UTC | May 27, 09:45 UTC | 6h 11m |
| 2026-05-25 | CQH6826 | - | May 25, 10:35 UTC | May 25, 13:00 UTC | 2h 25m |
| 2026-05-25 | CQH6825 | - | May 25, 06:40 UTC | May 25, 09:05 UTC | 2h 25m |
| 2026-05-17 | CQH6481 | SZX → DOY | May 17, 22:30 UTC | May 17, 22:45 UTC | 15m |
| 2026-05-17 | CQH6596 | TNA → SZX | May 17, 15:25 UTC | May 17, 15:35 UTC | 10m |
| 2026-05-17 | CQH6988 | - | May 17, 07:30 UTC | May 17, 08:55 UTC | 1h 25m |
| 2026-05-17 | CQH6987 | - | May 17, 04:40 UTC | May 17, 06:15 UTC | 1h 35m |
| 2026-05-15 | CQH6760 | SHE → PVG | May 15, 10:35 UTC | May 15, 11:10 UTC | 35m |
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-30AR page for operator, model, and routing details .