sensors Mode-S transponder
7817BA
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-30AN · AIRBUS A-320neo
- Hex
- 7817BA
- Octal
- 36013672
- Decimal
- 7,870,394
- Country
- CN
- Tail
- B-30AN
- Type
- A20N
- Flights observed
- 46
- Distinct callsigns
- 9
- Country
- CN
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 7817BA 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 9 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| OTC7309 | Air Travel | 16 | 2026-07-25 |
| OTC7723 | - | 13 | 2026-07-24 |
| OTC7310 | Air Travel | 8 | 2026-07-23 |
| OTC7724 | - | 2 | 2026-05-31 |
| OTC7704 | Air Travel | 2 | 2026-06-24 |
| OTC7703 | Air Travel | 2 | 2026-06-24 |
| OTC7288 | - | 1 | 2026-06-19 |
| OTC7287 | - | 1 | 2026-06-21 |
| OTC7193 | Air Travel | 1 | 2026-04-23 |
Recent flights last 46
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-25 | OTC7309 | SZX → BSD | Jul 25, 01:25 UTC | Jul 25, 02:15 UTC | 50m |
| 2026-07-24 | OTC7723 | - | Jul 24, 00:40 UTC | Jul 24, 00:50 UTC | 10m |
| 2026-07-23 | OTC7310 | BSD → SZX | Jul 23, 16:00 UTC | Jul 23, 16:10 UTC | 10m |
| 2026-07-23 | OTC7309 | - | Jul 23, 00:00 UTC | Jul 23, 00:20 UTC | 20m |
| 2026-07-22 | OTC7723 | - | Jul 22, 00:50 UTC | Jul 22, 01:05 UTC | 15m |
| 2026-07-21 | OTC7310 | BSD → SZX | Jul 21, 15:25 UTC | Jul 21, 15:35 UTC | 10m |
| 2026-07-20 | OTC7310 | - | Jul 20, 15:05 UTC | Jul 20, 15:15 UTC | 10m |
| 2026-07-19 | OTC7309 | - | Jul 19, 23:40 UTC | Jul 20, 00:00 UTC | 20m |
| 2026-06-24 | OTC7704 | HAK → KMG | Jun 24, 12:44 UTC | Jun 24, 13:00 UTC | 15m |
| 2026-06-24 | OTC7703 | KMG → HAK | Jun 24, 10:19 UTC | Jun 24, 10:30 UTC | 10m |
| 2026-06-21 | OTC7287 | - | Jun 21, 15:09 UTC | Jun 21, 15:19 UTC | 10m |
| 2026-06-19 | OTC7288 | - | Jun 19, 15:54 UTC | Jun 19, 16:04 UTC | 10m |
| 2026-06-15 | OTC7704 | HAK → KMG | Jun 15, 12:39 UTC | Jun 15, 12:55 UTC | 15m |
| 2026-06-15 | OTC7703 | KMG → HAK | Jun 15, 10:09 UTC | Jun 15, 10:35 UTC | 25m |
| 2026-06-13 | OTC7723 | - | Jun 13, 23:35 UTC | Jun 13, 23:50 UTC | 15m |
| 2026-06-13 | OTC7310 | BSD → SZX | Jun 13, 15:05 UTC | Jun 13, 15:15 UTC | 10m |
| 2026-06-13 | OTC7309 | SZX → BSD | Jun 13, 00:35 UTC | Jun 13, 00:45 UTC | 10m |
| 2026-06-11 | OTC7723 | - | Jun 11, 23:30 UTC | Jun 12, 00:20 UTC | 50m |
| 2026-06-11 | OTC7310 | BSD → SZX | Jun 11, 15:20 UTC | Jun 11, 15:30 UTC | 10m |
| 2026-06-11 | OTC7309 | SZX → BSD | Jun 11, 01:00 UTC | Jun 11, 01:20 UTC | 20m |
| 2026-06-11 | OTC7309 | SZX → BSD | Jun 11, 00:20 UTC | Jun 11, 00:30 UTC | 10m |
| 2026-06-10 | OTC7723 | - | Jun 10, 00:15 UTC | Jun 10, 00:25 UTC | 10m |
| 2026-06-09 | OTC7723 | - | Jun 9, 23:30 UTC | Jun 9, 23:45 UTC | 15m |
| 2026-06-09 | OTC7309 | SZX → BSD | Jun 9, 00:10 UTC | Jun 9, 00:25 UTC | 15m |
| 2026-06-08 | OTC7310 | BSD → SZX | Jun 8, 16:55 UTC | Jun 8, 17:05 UTC | 10m |
| 2026-06-07 | OTC7309 | SZX → BSD | Jun 7, 23:35 UTC | Jun 8, 00:40 UTC | 1h 5m |
| 2026-06-06 | OTC7723 | - | Jun 6, 23:24 UTC | Jun 6, 23:39 UTC | 15m |
| 2026-06-06 | OTC7309 | SZX → BSD | Jun 6, 03:05 UTC | Jun 6, 04:00 UTC | 55m |
| 2026-06-04 | OTC7723 | - | Jun 4, 23:40 UTC | Jun 4, 23:55 UTC | 15m |
| 2026-06-03 | OTC7309 | SZX → BSD | Jun 3, 23:55 UTC | Jun 4, 00:45 UTC | 50m |
| 2026-06-03 | OTC7723 | - | Jun 3, 00:15 UTC | Jun 3, 00:25 UTC | 10m |
| 2026-06-02 | OTC7723 | - | Jun 2, 23:30 UTC | Jun 2, 23:40 UTC | 10m |
| 2026-06-02 | OTC7310 | BSD → SZX | Jun 2, 15:10 UTC | Jun 2, 15:20 UTC | 10m |
| 2026-06-02 | OTC7309 | SZX → BSD | Jun 2, 00:10 UTC | Jun 2, 01:05 UTC | 55m |
| 2026-05-31 | OTC7309 | SZX → BSD | May 31, 23:20 UTC | Jun 1, 00:10 UTC | 50m |
| 2026-05-31 | OTC7724 | - | May 31, 15:15 UTC | May 31, 15:25 UTC | 10m |
| 2026-05-30 | OTC7723 | - | May 30, 23:45 UTC | May 31, 00:35 UTC | 50m |
| 2026-05-30 | OTC7309 | SZX → BSD | May 30, 00:00 UTC | May 30, 00:15 UTC | 15m |
| 2026-05-29 | OTC7724 | - | May 29, 17:40 UTC | May 29, 17:50 UTC | 10m |
| 2026-05-29 | OTC7723 | - | May 29, 00:45 UTC | May 29, 00:55 UTC | 10m |
| 2026-05-28 | OTC7309 | SZX → BSD | May 28, 00:00 UTC | May 28, 00:10 UTC | 10m |
| 2026-05-26 | OTC7723 | - | May 26, 23:35 UTC | May 26, 23:54 UTC | 20m |
| 2026-05-26 | OTC7310 | BSD → SZX | May 26, 16:05 UTC | May 26, 16:15 UTC | 10m |
| 2026-05-26 | OTC7309 | SZX → BSD | May 26, 00:00 UTC | May 26, 00:09 UTC | 10m |
| 2026-05-24 | OTC7309 | SZX → BSD | May 24, 23:35 UTC | May 24, 23:46 UTC | 11m |
| 2026-04-23 | OTC7193 | WUX → HRB | Apr 23, 02:35 UTC | Apr 23, 06:55 UTC | 4h 20m |
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-30AN page for operator, model, and routing details .