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
- 35
- Distinct callsigns
- 12
- Country
- CN
- Last broadcast
- 19d 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 12 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CGZ7214 | - | 9 | 2026-07-22 |
| CGZ703 | Colorful Guizhou Airlines | 6 | 2026-07-23 |
| CGZ7244 | Colorful Guizhou Airlines | 5 | 2026-07-23 |
| CGZ706 | - | 3 | 2026-07-10 |
| CGZ705 | - | 3 | 2026-07-10 |
| CGZ7243 | - | 2 | 2026-07-16 |
| CGZ7213 | - | 2 | 2026-07-01 |
| CGZ721W | - | 1 | 2026-05-21 |
| CGZ721V | - | 1 | 2026-05-21 |
| CGZ7124 | Colorful Guizhou Airlines | 1 | 2026-07-26 |
| CGZ7105 | Colorful Guizhou Airlines | 1 | 2026-06-24 |
| CGZ704 | - | 1 | 2026-07-07 |
Recent flights last 35
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CGZ7124 | TNA → KWE | Jul 26, 14:05 UTC | Jul 26, 14:15 UTC | 10m |
| 2026-07-23 | CGZ703 | KWE → SGN | Jul 23, 19:55 UTC | Jul 24, 00:40 UTC | 4h 45m |
| 2026-07-23 | CGZ7244 | SZX → HIA | Jul 23, 03:25 UTC | Jul 23, 03:35 UTC | 10m |
| 2026-07-22 | CGZ7214 | - | Jul 22, 13:20 UTC | Jul 22, 13:35 UTC | 15m |
| 2026-07-21 | CGZ703 | KWE → SGN | Jul 21, 16:50 UTC | Jul 21, 23:20 UTC | 6h 30m |
| 2026-07-19 | CGZ7214 | - | Jul 19, 13:45 UTC | Jul 19, 14:00 UTC | 15m |
| 2026-07-18 | CGZ703 | - | Jul 18, 17:35 UTC | Jul 18, 23:10 UTC | 5h 35m |
| 2026-07-16 | CGZ7243 | - | Jul 16, 12:55 UTC | Jul 16, 13:30 UTC | 35m |
| 2026-07-14 | CGZ7214 | - | Jul 14, 13:40 UTC | Jul 14, 13:50 UTC | 10m |
| 2026-07-11 | CGZ703 | - | Jul 11, 16:35 UTC | Jul 11, 23:10 UTC | 6h 35m |
| 2026-07-10 | CGZ706 | - | Jul 10, 22:00 UTC | Jul 11, 17:00 UTC | 19h 0m |
| 2026-07-10 | CGZ705 | - | Jul 10, 19:15 UTC | Jul 10, 19:45 UTC | 30m |
| 2026-07-09 | CGZ7244 | - | Jul 9, 03:20 UTC | Jul 9, 03:35 UTC | 15m |
| 2026-07-08 | CGZ7214 | - | Jul 8, 15:30 UTC | Jul 8, 15:45 UTC | 15m |
| 2026-07-07 | CGZ704 | - | Jul 7, 16:50 UTC | Jul 7, 23:10 UTC | 6h 20m |
| 2026-07-06 | CGZ7214 | - | Jul 6, 16:10 UTC | Jul 6, 16:25 UTC | 15m |
| 2026-07-02 | CGZ7244 | - | Jul 2, 05:15 UTC | Jul 2, 05:30 UTC | 15m |
| 2026-07-01 | CGZ7213 | - | Jul 1, 11:05 UTC | Jul 1, 11:15 UTC | 10m |
| 2026-06-30 | CGZ703 | - | Jun 30, 16:45 UTC | Jun 30, 23:20 UTC | 6h 35m |
| 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 .