sensors Mode-S transponder
7815DC
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-305M · AIRBUS A-320neo
- Hex
- 7815DC
- Octal
- 36012734
- Decimal
- 7,869,916
- Country
- CN
- Tail
- B-305M
- Type
- A20N
- Flights observed
- 28
- Distinct callsigns
- 12
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 7815DC 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 12 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CQN2394 | Chongqing Airlines | 11 | 2026-04-28 |
| CQN2346 | - | 7 | 2026-05-31 |
| CQN2393 | Chongqing Airlines | 1 | 2026-04-18 |
| CQN2386 | - | 1 | 2026-05-22 |
| CQN2345 | - | 1 | 2026-05-05 |
| CQN2343 | - | 1 | 2026-05-23 |
| CQN2336 | - | 1 | 2026-04-16 |
| CQN2332 | - | 1 | 2026-05-28 |
| CQN2331 | - | 1 | 2026-05-28 |
| CQN2330 | - | 1 | 2026-06-01 |
| CQN2062 | Chongqing Airlines | 1 | 2026-05-01 |
| CQN2061 | Chongqing Airlines | 1 | 2026-05-01 |
Recent flights last 28
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-01 | CQN2330 | - | Jun 1, 04:50 UTC | Jun 1, 05:05 UTC | 15m |
| 2026-05-31 | CQN2346 | - | May 31, 14:50 UTC | May 31, 15:05 UTC | 15m |
| 2026-05-28 | CQN2332 | - | May 28, 14:25 UTC | May 28, 14:45 UTC | 20m |
| 2026-05-28 | CQN2331 | - | May 28, 12:05 UTC | May 28, 12:25 UTC | 20m |
| 2026-05-23 | CQN2343 | - | May 23, 00:35 UTC | May 23, 00:45 UTC | 10m |
| 2026-05-22 | CQN2386 | - | May 22, 14:40 UTC | May 22, 14:50 UTC | 10m |
| 2026-05-06 | CQN2346 | - | May 6, 12:55 UTC | May 6, 13:05 UTC | 10m |
| 2026-05-05 | CQN2346 | - | May 5, 08:05 UTC | May 5, 08:15 UTC | 10m |
| 2026-05-05 | CQN2345 | - | May 5, 06:25 UTC | May 5, 06:35 UTC | 10m |
| 2026-05-02 | CQN2346 | - | May 2, 08:10 UTC | May 2, 08:20 UTC | 10m |
| 2026-05-01 | CQN2346 | - | May 1, 12:45 UTC | May 1, 12:55 UTC | 10m |
| 2026-05-01 | CQN2062 | HKG → CKG | May 1, 05:30 UTC | May 1, 05:40 UTC | 10m |
| 2026-05-01 | CQN2061 | CKG → HKG | May 1, 03:35 UTC | May 1, 04:00 UTC | 25m |
| 2026-04-30 | CQN2346 | - | Apr 30, 08:10 UTC | Apr 30, 08:20 UTC | 10m |
| 2026-04-28 | CQN2394 | CMB → CKG | Apr 28, 17:30 UTC | Apr 29, 11:25 UTC | 17h 55m |
| 2026-04-28 | CQN2394 | CMB → CKG | Apr 28, 14:35 UTC | Apr 29, 11:25 UTC | 20h 50m |
| 2026-04-28 | CQN2394 | CMB → CKG | Apr 28, 11:40 UTC | Apr 29, 07:55 UTC | 20h 15m |
| 2026-04-28 | CQN2394 | CMB → CKG | Apr 28, 09:15 UTC | Apr 29, 07:55 UTC | 22h 40m |
| 2026-04-28 | CQN2394 | CMB → CKG | Apr 28, 07:00 UTC | Apr 28, 20:00 UTC | 13h 0m |
| 2026-04-18 | CQN2394 | CMB → CKG | Apr 18, 17:05 UTC | Apr 19, 11:50 UTC | 18h 45m |
| 2026-04-18 | CQN2394 | CMB → CKG | Apr 18, 16:55 UTC | Apr 19, 11:50 UTC | 18h 55m |
| 2026-04-18 | CQN2394 | CMB → CKG | Apr 18, 14:35 UTC | Apr 19, 11:50 UTC | 21h 15m |
| 2026-04-18 | CQN2394 | CMB → CKG | Apr 18, 11:35 UTC | Apr 19, 08:15 UTC | 20h 39m |
| 2026-04-18 | CQN2394 | CMB → CKG | Apr 18, 09:25 UTC | Apr 19, 08:15 UTC | 22h 49m |
| 2026-04-18 | CQN2393 | CMB → MLE | Apr 18, 07:25 UTC | Apr 18, 08:45 UTC | 1h 20m |
| 2026-04-18 | CQN2394 | CMB → CKG | Apr 18, 06:55 UTC | Apr 18, 19:40 UTC | 12h 45m |
| 2026-04-16 | CQN2336 | - | Apr 16, 03:39 UTC | Apr 16, 03:49 UTC | 10m |
| 2026-04-14 | CQN2346 | - | Apr 14, 08:20 UTC | Apr 14, 08:30 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-305M page for operator, model, and routing details .