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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks in Italy
945 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.43.1.0/24 | 256 | RIPE NCC |  IT | 3rd Feb 1995 |
| 193.43.137.0/24 | 256 | RIPE NCC | IT | 28th Mar 1994 |
| 193.43.3.0/25 | 128 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.128/27 | 32 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.160/28 | 16 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.176/30 | 4 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.180/30 | 4 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.184/29 | 8 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.192/26 | 64 | RIPE NCC | IT | 31st May 1994 |
| 193.43.73.0/24 | 256 | RIPE NCC | IT | 1st Jan 1995 |
| 193.43.76.0/24 | 256 | RIPE NCC | IT | 12th Jan 1995 |
| 193.56.183.0/24 | 256 | RIPE NCC | IT | 17th Dec 2025 |
| 193.84.84.0/24 | 256 | RIPE NCC | IT | 23rd Jul 2025 |
| 193.9.18.0/24 | 256 | RIPE NCC | IT | 24th Feb 2009 |
| 194.0.139.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.141.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.159.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.168.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.243.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.248.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.1.160.0/24 | 256 | RIPE NCC | IT | 16th Feb 2007 |
| 194.1.177.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.1.179.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.110.20.0/23 | 512 | RIPE NCC | IT | 29th Oct 2019 |
| 194.110.28.0/23 | 512 | RIPE NCC | IT | 29th Oct 2019 |
| 194.116.100.0/24 | 256 | RIPE NCC | IT | 19th Sept 2002 |
| 194.116.64.0/21 | 2k | RIPE NCC | IT | 19th Sept 2002 |
| 194.146.100.0/22 | 1k | RIPE NCC | IT | 29th May 2018 |
| 194.149.244.0/24 | 256 | RIPE NCC | IT | 31st Jul 2000 |
| 194.152.48.0/23 | 512 | RIPE NCC | IT | 20th May 2008 |
| 194.153.212.0/23 | 512 | RIPE NCC | IT | 9th May 2000 |
| 194.179.150.0/23 | 512 | RIPE NCC | IT | 26th Jun 1996 |
| 194.187.117.0/24 | 256 | RIPE NCC | IT | 22nd Jul 2021 |
| 194.247.56.0/24 | 256 | RIPE NCC | IT | 27th Dec 2010 |
| 194.32.100.0/22 | 1k | RIPE NCC | IT | 26th Oct 2018 |
| 194.32.211.0/24 | 256 | RIPE NCC | IT | 1st Oct 2024 |
| 194.35.76.0/23 | 512 | RIPE NCC | IT | 22nd Oct 2019 |
| 194.38.60.0/22 | 1k | RIPE NCC | IT | 29th Nov 2018 |
| 194.42.41.0/24 | 256 | RIPE NCC | IT | 1st Feb 2001 |
| 194.42.42.0/24 | 256 | RIPE NCC | IT | 1st Feb 2001 |
| 194.48.254.0/24 | 256 | RIPE NCC | IT | 18th Jun 2026 |
| 194.50.52.0/24 | 256 | RIPE NCC | IT | 21st Nov 2019 |
| 194.50.82.0/24 | 256 | RIPE NCC | IT | 21st Nov 2019 |
| 194.76.199.0/24 | 256 | RIPE NCC | IT | 26th Jan 2026 |
| 195.128.131.0/24 | 256 | RIPE NCC | IT | 11th Dec 2024 |
| 195.13.35.0/24 | 256 | RIPE NCC | IT | 4th May 2026 |
| 195.14.105.0/24 | 256 | RIPE NCC | IT | 28th Jul 2021 |
| 195.177.112.0/23 | 512 | RIPE NCC | IT | 6th Jun 2018 |
| 195.177.115.0/24 | 256 | RIPE NCC | IT | 6th Jun 2018 |
| 195.177.254.0/24 | 256 | RIPE NCC | IT | 26th Jun 2023 |