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 |
|---|---|---|---|---|
| 00C4B2 |  | 2026-05-04 11:35:47 | 2026-05-04 11:57:54 | ZSZZT |
| 38B5BB |  | 2025-01-21 16:58:12 | 2026-05-04 11:57:54 | |
| 388161 | | 2026-04-21 15:01:12 | 2026-05-04 11:46:52 | |
| D758E3 | (reserved-for-future-use) | 2026-05-04 11:23:38 | 2026-05-04 11:31:55 | |
| C87C43 |  | 2026-05-04 10:51:30 | 2026-05-04 10:56:18 | |
| 2080AC | (reserved-for-AFI) | 2026-05-04 10:39:49 | 2026-05-04 10:50:42 | |
| A2089F |  | 2026-05-04 10:27:23 | 2026-05-04 10:33:37 | |
| 67A65C | (reserved-for-MID) | 2026-05-04 10:18:31 | 2026-05-04 10:23:32 | |
| EDFC56 | (reserved-for-CAR) | 2026-05-04 10:10:56 | 2026-05-04 10:14:58 | |
| 43EC5C |  | 2026-05-04 09:13:32 | 2026-05-04 09:36:15 | |
| CF8A58 | Unallocated | 2026-05-04 09:06:12 | 2026-05-04 09:12:59 | |
| 6B09E6 | (reserved-for-ASIA) | 2026-05-04 08:21:35 | 2026-05-04 08:25:37 | |
| 04CA4D |  | 2026-05-04 07:06:52 | 2026-05-04 07:26:51 | |
| EE45C0 | (reserved-for-CAR) | 2026-05-03 19:46:30 | 2026-05-03 19:51:19 | |
| 6E8035 | (reserved-for-ASIA) | 2026-05-03 19:31:02 | 2026-05-03 19:45:55 | |
| 31DF8F |  | 2026-05-03 19:00:32 | 2026-05-03 19:00:32 | |
| 387BFC | | 2024-07-13 08:33:32 | 2026-05-03 19:00:30 | |
| 3850BC | | 2022-03-05 13:48:55 | 2026-05-03 16:12:58 | FJFIS |
| 928BAA | (reserved-for-NAM/PAC) | 2026-05-03 15:36:58 | 2026-05-03 15:43:24 | |
| 6252FE | (reserved-for-MID) | 2026-05-03 14:00:11 | 2026-05-03 14:13:06 | |
| 392B19 | | 2026-05-02 07:59:37 | 2026-05-03 14:04:15 | FGKYZ |
| DE8D3E | (reserved-for-future-use) | 2026-05-03 13:34:30 | 2026-05-03 13:40:57 | |
| 68C5B6 | (reserved-for-ASIA) | 2026-05-03 13:20:47 | 2026-05-03 13:28:08 | |
| 9CBA9A | (reserved-for-NAM/PAC) | 2026-05-03 12:35:53 | 2026-05-03 12:44:01 | |
| 51C034 | (reserved-for-EUR/NAT) | 2026-05-03 11:09:16 | 2026-05-03 11:14:06 |