sensors Mode-S transponder
7815DD
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-305N · AIRBUS A-320neo
- Hex
- 7815DD
- Octal
- 36012735
- Decimal
- 7,869,917
- Country
- CN
- Tail
- B-305N
- Type
- A20N
- Flights observed
- 36
- Distinct callsigns
- 17
- Country
- CN
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 7815DD 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 17 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CQN2193 | Chongqing Airlines | 5 | 2026-05-20 |
| CQN2394 | Chongqing Airlines | 4 | 2026-04-30 |
| CQN2361 | Chongqing Airlines | 4 | 2026-05-23 |
| CQN2194 | Chongqing Airlines | 4 | 2026-05-21 |
| CQN2362 | Chongqing Airlines | 3 | 2026-05-23 |
| CQN2096 | Chongqing Airlines | 2 | 2026-05-22 |
| CQN2062 | Chongqing Airlines | 2 | 2026-05-17 |
| CQN2061 | Chongqing Airlines | 2 | 2026-05-17 |
| CQN2350 | - | 1 | 2026-04-26 |
| CQN2346 | - | 1 | 2026-04-20 |
| CQN2345 | - | 1 | 2026-04-20 |
| CQN2344 | - | 1 | 2026-04-23 |
| CQN2336 | - | 1 | 2026-05-19 |
| CQN2335 | - | 1 | 2026-05-19 |
| CQN2095 | Chongqing Airlines | 1 | 2026-05-05 |
| CQN2066 | - | 1 | 2026-05-09 |
| CQN2065 | Chongqing Airlines | 1 | 2026-05-09 |
Recent flights last 36
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-23 | CQN2362 | BKK → CKG | May 23, 18:25 UTC | May 23, 19:20 UTC | 55m |
| 2026-05-23 | CQN2361 | CKG → BKK | May 23, 15:45 UTC | May 23, 16:40 UTC | 55m |
| 2026-05-22 | CQN2096 | SIN → CKG | May 22, 06:55 UTC | May 22, 07:20 UTC | 25m |
| 2026-05-21 | CQN2194 | BKI → CKG | May 21, 16:20 UTC | May 21, 18:45 UTC | 2h 25m |
| 2026-05-20 | CQN2193 | CKG → BKI | May 20, 19:20 UTC | May 21, 15:00 UTC | 19h 40m |
| 2026-05-20 | CQN2193 | CKG → BKI | May 20, 18:30 UTC | May 21, 15:00 UTC | 20h 30m |
| 2026-05-20 | CQN2361 | CKG → BKK | May 20, 16:20 UTC | May 20, 16:50 UTC | 30m |
| 2026-05-19 | CQN2336 | - | May 19, 03:40 UTC | May 19, 03:55 UTC | 15m |
| 2026-05-19 | CQN2335 | - | May 19, 01:35 UTC | May 19, 01:45 UTC | 10m |
| 2026-05-17 | CQN2062 | HKG → CKG | May 17, 05:45 UTC | May 17, 06:00 UTC | 15m |
| 2026-05-17 | CQN2061 | CKG → HKG | May 17, 03:15 UTC | May 17, 03:45 UTC | 30m |
| 2026-05-15 | CQN2362 | BKK → CKG | May 15, 18:30 UTC | May 15, 19:25 UTC | 55m |
| 2026-05-15 | CQN2361 | CKG → BKK | May 15, 16:00 UTC | May 15, 16:55 UTC | 55m |
| 2026-05-09 | CQN2066 | - | May 9, 09:05 UTC | May 9, 09:15 UTC | 10m |
| 2026-05-09 | CQN2065 | SZX → SZX | May 9, 07:35 UTC | May 9, 07:55 UTC | 20m |
| 2026-05-08 | CQN2062 | HKG → CKG | May 8, 05:35 UTC | May 8, 05:49 UTC | 15m |
| 2026-05-08 | CQN2061 | CKG → HKG | May 8, 03:14 UTC | May 8, 03:39 UTC | 25m |
| 2026-05-05 | CQN2096 | SIN → CKG | May 5, 07:15 UTC | May 5, 07:30 UTC | 15m |
| 2026-05-05 | CQN2095 | CKG → SIN | May 5, 04:30 UTC | May 5, 04:45 UTC | 15m |
| 2026-05-02 | CQN2194 | BKI → CKG | May 2, 16:25 UTC | May 2, 19:00 UTC | 2h 35m |
| 2026-05-02 | CQN2193 | CKG → BKI | May 2, 12:20 UTC | May 2, 14:55 UTC | 2h 35m |
| 2026-04-30 | CQN2394 | CMB → CKG | Apr 30, 06:35 UTC | Apr 30, 19:55 UTC | 13h 20m |
| 2026-04-26 | CQN2350 | - | Apr 26, 08:10 UTC | Apr 26, 08:25 UTC | 15m |
| 2026-04-25 | CQN2394 | CMB → CKG | Apr 25, 11:40 UTC | Apr 26, 06:05 UTC | 18h 25m |
| 2026-04-25 | CQN2394 | CMB → CKG | Apr 25, 07:20 UTC | Apr 26, 06:05 UTC | 22h 45m |
| 2026-04-25 | CQN2394 | CMB → CKG | Apr 25, 06:50 UTC | Apr 25, 19:55 UTC | 13h 5m |
| 2026-04-23 | CQN2344 | - | Apr 23, 03:00 UTC | Apr 23, 03:10 UTC | 10m |
| 2026-04-23 | - | - | Apr 23, 01:00 UTC | Apr 23, 01:10 UTC | 10m |
| 2026-04-20 | CQN2346 | - | Apr 20, 15:00 UTC | Apr 20, 15:10 UTC | 10m |
| 2026-04-20 | CQN2345 | - | Apr 20, 13:15 UTC | Apr 20, 13:25 UTC | 10m |
| 2026-04-16 | CQN2194 | - | Apr 16, 17:54 UTC | Apr 16, 18:35 UTC | 40m |
| 2026-04-16 | CQN2194 | - | Apr 16, 16:10 UTC | Apr 16, 16:35 UTC | 25m |
| 2026-04-16 | CQN2193 | CKG → BKI | Apr 16, 14:25 UTC | Apr 16, 14:55 UTC | 30m |
| 2026-04-16 | CQN2193 | CKG → BKI | Apr 16, 12:24 UTC | Apr 16, 12:45 UTC | 20m |
| 2026-04-13 | CQN2362 | BKK → CKG | Apr 13, 17:50 UTC | Apr 13, 18:15 UTC | 25m |
| 2026-04-13 | CQN2361 | CKG → BKK | Apr 13, 16:10 UTC | Apr 13, 16:20 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-305N page for operator, model, and routing details .