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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 104.153.164.0/23 | 512 | ARIN |  IT | 6th Aug 2014 |
| 128.45.0.0/16 | 65.5k | RIPE NCC | IT | 6th Oct 2011 |
| 128.66.0.0/15 | 131k | RIPE NCC | IT | 6th Oct 2011 |
| 143.246.160.0/21 | 2k | RIPE NCC | IT | 26th Oct 1990 |
| 146.100.0.0/16 | 65.5k | RIPE NCC | IT | 5th Feb 1991 |
| 149.62.128.0/20 | 4.1k | RIPE NCC | IT | 22nd Jul 2011 |
| 151.2.20.0/22 | 1k | RIPE NCC | IT | 13th May 1991 |
| 151.2.24.0/21 | 2k | RIPE NCC | IT | 13th May 1991 |
| 151.85.0.0/16 | 65.5k | RIPE NCC | IT | 13th May 1991 |
| 151.86.0.0/16 | 65.5k | RIPE NCC | IT | 13th May 1991 |
| 151.94.0.0/16 | 65.5k | RIPE NCC | IT | 13th May 1991 |
| 159.210.0.0/16 | 65.5k | RIPE NCC | IT | 1st Sept 1993 |
| 160.180.0.0/16 | 65.5k | RIPE NCC | IT | 5th Apr 2004 |
| 160.66.0.0/16 | 65.5k | RIPE NCC | IT | 1st Sept 1993 |
| 161.147.0.0/16 | 65.5k | RIPE NCC | IT | 1st Sept 1993 |
| 164.142.0.0/16 | 65.5k | RIPE NCC | IT | 18th Feb 1994 |
| 171.25.191.0/24 | 256 | RIPE NCC | IT | 13th Jan 2012 |
| 176.101.171.0/24 | 256 | RIPE NCC | IT | 25th Jun 2020 |
| 176.103.248.0/21 | 2k | RIPE NCC | IT | 23rd Dec 2011 |
| 178.217.235.0/24 | 256 | RIPE NCC | IT | 10th Jul 2020 |
| 185.0.18.0/24 | 256 | RIPE NCC | IT | 20th Jan 2023 |
| 185.0.9.0/24 | 256 | RIPE NCC | IT | 23rd Nov 2022 |
| 185.1.106.0/24 | 256 | RIPE NCC | IT | 29th Nov 2017 |
| 185.1.114.0/24 | 256 | RIPE NCC | IT | 9th Feb 2018 |
| 185.1.115.0/24 | 256 | RIPE NCC | IT | 9th Feb 2018 |
| 185.1.124.0/24 | 256 | RIPE NCC | IT | 13th Nov 2018 |
| 185.1.139.0/24 | 256 | RIPE NCC | IT | 18th Jul 2019 |
| 185.1.186.0/24 | 256 | RIPE NCC | IT | 24th Aug 2020 |
| 185.1.206.0/24 | 256 | RIPE NCC | IT | 31st May 2021 |
| 185.1.218.0/24 | 256 | RIPE NCC | IT | 18th Oct 2021 |
| 185.1.231.0/24 | 256 | RIPE NCC | IT | 13th Jan 2022 |
| 185.1.80.0/24 | 256 | RIPE NCC | IT | 22nd Aug 2016 |
| 185.1.97.0/24 | 256 | RIPE NCC | IT | 27th Sept 2017 |
| 185.10.32.0/22 | 1k | RIPE NCC | IT | 15th Nov 2012 |
| 185.10.76.0/22 | 1k | RIPE NCC | IT | 16th Nov 2012 |
| 185.100.116.0/22 | 1k | RIPE NCC | IT | 15th May 2015 |
| 185.100.120.0/22 | 1k | RIPE NCC | IT | 15th May 2015 |
| 185.100.124.0/22 | 1k | RIPE NCC | IT | 15th May 2015 |
| 185.102.140.0/22 | 1k | RIPE NCC | IT | 29th May 2015 |
| 185.104.24.0/22 | 1k | RIPE NCC | IT | 11th Jun 2015 |
| 185.118.184.0/22 | 1k | RIPE NCC | IT | 24th Sept 2015 |
| 185.127.32.0/22 | 1k | RIPE NCC | IT | 18th Nov 2015 |
| 185.136.241.0/24 | 256 | RIPE NCC | IT | 21st Jan 2026 |
| 185.138.60.0/22 | 1k | RIPE NCC | IT | 10th Feb 2016 |
| 185.139.180.0/24 | 256 | RIPE NCC | IT | 19th Feb 2016 |
| 185.142.244.0/22 | 1k | RIPE NCC | IT | 11th Mar 2016 |
| 185.152.156.0/22 | 1k | RIPE NCC | IT | 19th May 2016 |
| 185.158.88.0/22 | 1k | RIPE NCC | IT | 4th Jul 2016 |
| 185.164.160.0/24 | 256 | RIPE NCC | IT | 13th Mar 2023 |
| 185.173.131.0/24 | 256 | RIPE NCC | IT | 25th Jun 2021 |