Unknown hex codes
The table below shows the latest 25 unknown hex codes picked up from my location in Briancon and other sites.
| ModeS Code | Country | First Seen (UTC) | Last Seen (UTC) | CallSign |
|---|---|---|---|---|
| 38B5BB |  | 2025-01-21 16:58:12 | 2025-12-05 11:09:13 | |
| 38DD5B | | 2024-05-21 06:15:51 | 2025-12-05 11:00:46 | FPHCO |
| 398E28 | | 2025-12-05 10:18:21 | 2025-12-05 10:39:36 | FHDRI |
| 3518D3 |  | 2025-12-03 09:20:46 | 2025-12-05 09:24:15 | |
| 8DEB74 | Unallocated | 2025-12-05 08:41:54 | 2025-12-05 09:20:48 | |
| D6B4C4 | (reserved-for-future-use) | 2025-12-04 14:42:07 | 2025-12-04 15:19:55 | |
| 39BA23 | | 2025-06-18 13:24:58 | 2025-12-04 14:49:52 | |
| 4B0D40 |  | 2025-12-04 13:48:44 | 2025-12-04 13:58:58 | P40T |
| 393CC3 | | 2025-09-22 09:02:41 | 2025-12-04 12:59:55 | FGPGD |
| 33FC70 |  | 2025-11-28 08:56:01 | 2025-12-04 09:37:40 | PROVA12 |
| 4CAAA6 |  | 2025-12-03 18:51:59 | 2025-12-03 18:57:29 | |
| E45618 |  | 2025-12-03 15:14:51 | 2025-12-03 15:19:36 | |
| 7584A7 |  | 2025-12-03 11:05:42 | 2025-12-03 11:33:19 | RPC4165 |
| 92C521 | (reserved-for-NAM/PAC) | 2025-12-02 15:49:04 | 2025-12-02 15:59:22 | |
| 300A7F | | 2025-10-17 09:03:24 | 2025-12-02 14:35:22 | ISRAA |
| DFA390 | (reserved-for-future-use) | 2025-12-02 13:16:37 | 2025-12-02 13:21:22 | |
| 4D405B |  | 2024-07-11 13:24:10 | 2025-12-02 12:38:03 | 3AMXL |
| 398A1D | | 2025-08-07 17:02:23 | 2025-12-02 12:15:22 | |
| 115EF5 |  | 2025-12-02 11:16:13 | 2025-12-02 11:23:48 | |
| 3997DB | | 2025-06-16 12:18:17 | 2025-12-02 11:14:48 | FWOOD |
| 3962BC | | 2020-02-21 14:04:41 | 2025-12-02 10:47:14 | |
| 47ADBE |  | 2025-12-02 09:01:03 | 2025-12-02 09:10:36 | |
| 3AFC44 | | 2025-12-02 08:01:57 | 2025-12-02 08:10:38 | |
| E1A8A3 |  | 2025-12-01 16:36:19 | 2025-12-01 16:40:21 | |
| 3A1F5C | | 2025-12-01 13:56:44 | 2025-12-01 14:10:55 |