sensors Mode-S transponder
781CDB
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-327Q · AIRBUS A-320neo
- Hex
- 781CDB
- Octal
- 36016333
- Decimal
- 7,871,707
- Country
- CN
- Tail
- B-327Q
- Type
- A20N
- Flights observed
- 17
- Distinct callsigns
- 10
- Country
- CN
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 781CDB 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 10 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CGZ7214 | - | 4 | 2026-06-27 |
| CGZ7244 | - | 2 | 2026-06-23 |
| CGZ706 | Colorful Guizhou Airlines | 2 | 2026-06-25 |
| CGZ705 | Colorful Guizhou Airlines | 2 | 2026-06-25 |
| CGZ703 | - | 2 | 2026-06-30 |
| CGZ7243 | Colorful Guizhou Airlines | 1 | 2026-05-16 |
| CGZ721W | - | 1 | 2026-05-21 |
| CGZ721V | - | 1 | 2026-05-21 |
| CGZ7213 | Colorful Guizhou Airlines | 1 | 2026-05-14 |
| CGZ7105 | Colorful Guizhou Airlines | 1 | 2026-06-24 |
Recent flights last 17
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-30 | CGZ703 | - | Jun 30, 16:45 UTC | Jun 30, 17:25 UTC | 40m |
| 2026-06-27 | CGZ7214 | - | Jun 27, 15:30 UTC | Jun 27, 15:39 UTC | 10m |
| 2026-06-25 | CGZ706 | ICN → KWE | Jun 25, 21:50 UTC | Jun 25, 22:10 UTC | 20m |
| 2026-06-25 | CGZ705 | KWE → ICN | Jun 25, 19:29 UTC | Jun 25, 19:49 UTC | 20m |
| 2026-06-24 | CGZ7105 | KWE → SYX | Jun 24, 23:54 UTC | Jun 25, 03:10 UTC | 3h 15m |
| 2026-06-23 | CGZ7244 | - | Jun 23, 03:45 UTC | Jun 23, 03:54 UTC | 10m |
| 2026-06-20 | CGZ703 | KWE → SGN | Jun 20, 16:44 UTC | Jun 20, 23:14 UTC | 6h 30m |
| 2026-06-18 | CGZ7214 | - | Jun 18, 18:30 UTC | Jun 18, 18:45 UTC | 15m |
| 2026-06-15 | CGZ706 | ICN → KWE | Jun 15, 22:05 UTC | Jun 15, 22:30 UTC | 25m |
| 2026-06-15 | CGZ705 | KWE → ICN | Jun 15, 19:20 UTC | Jun 15, 19:50 UTC | 30m |
| 2026-05-21 | CGZ721V | - | May 21, 08:35 UTC | May 21, 08:50 UTC | 15m |
| 2026-05-21 | CGZ721W | - | May 21, 06:20 UTC | May 21, 06:30 UTC | 10m |
| 2026-05-16 | CGZ7214 | SZX → TFU | May 16, 13:21 UTC | May 16, 13:31 UTC | 10m |
| 2026-05-16 | CGZ7243 | HIA → SZX | May 16, 11:16 UTC | May 16, 11:31 UTC | 15m |
| 2026-05-14 | CGZ7244 | SZX → HIA | May 14, 03:05 UTC | May 14, 03:15 UTC | 10m |
| 2026-05-14 | CGZ7213 | TFU → SZX | May 14, 01:30 UTC | May 14, 01:40 UTC | 10m |
| 2026-05-10 | CGZ7214 | SZX → TFU | May 10, 13:19 UTC | May 10, 13:35 UTC | 15m |
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-327Q page for operator, model, and routing details .