Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
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Countries with unannounced space registered through ARIN, largest first.
Unannounced blocks in Italy
11 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 104.153.164.0/23 | 512 | ARIN |  IT | 6th Aug 2014 |
| 199.103.119.0/24 | 256 | ARIN | IT | 26th Jun 1994 |
| 204.154.94.0/23 | 512 | ARIN | IT | 25th Oct 2010 |
| 204.231.237.0/24 | 256 | ARIN | IT | 21st Apr 1995 |
| 204.79.130.0/23 | 512 | ARIN | IT | 14th Dec 1994 |
| 204.79.132.0/24 | 256 | ARIN | IT | 14th Dec 1994 |
| 204.79.240.0/24 | 256 | ARIN | IT | 19th Dec 1994 |
| 23.166.52.0/24 | 256 | ARIN | IT | 23rd Oct 2026 |
| 2602:f29e::/40 | 16.8M × /64 | ARIN | IT | 16th Oct 2026 |
| 2605:2e00::/36 | 268M × /64 | ARIN | IT | 15th Aug 2014 |
| 2620:28:8000::/48 | 65.5k × /64 | ARIN | IT | 27th Apr 2011 |