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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 195.144.27.0/24 | 256 | RIPE NCC |  GB | 25th Nov 2019 |
| 195.144.29.0/24 | 256 | RIPE NCC |  RU | 17th Nov 2005 |
| 195.144.31.0/24 | 256 | RIPE NCC |  DE | 17th Nov 2005 |
| 195.149.103.0/24 | 256 | RIPE NCC | GB | 1st Sept 2003 |
| 195.149.106.0/24 | 256 | RIPE NCC |  UA | 4th Sept 2003 |
| 195.149.109.0/24 | 256 | RIPE NCC |  LT | 9th Sept 2003 |
| 195.149.113.0/24 | 256 | RIPE NCC |  ES | 12th Sept 2003 |
| 195.149.117.0/24 | 256 | RIPE NCC | UA | 13th Apr 2011 |
| 195.149.122.0/24 | 256 | RIPE NCC | DE | 17th Sept 2003 |
| 195.149.65.0/24 | 256 | RIPE NCC |  SA | 23rd Jul 2003 |
| 195.149.68.0/24 | 256 | RIPE NCC |  PL | 25th Jul 2003 |
| 195.149.72.0/24 | 256 | RIPE NCC |  RO | 28th Jul 2003 |
| 195.149.74.0/24 | 256 | RIPE NCC | DE | 30th Jul 2003 |
| 195.149.79.0/24 | 256 | RIPE NCC | DE | 25th Aug 2011 |
| 195.149.87.0/24 | 256 | RIPE NCC |  MD | 12th Aug 2003 |
| 195.158.200.0/22 | 1k | RIPE NCC | DE | 16th Jan 2019 |
| 195.158.212.0/22 | 1k | RIPE NCC | DE | 16th Jan 2019 |
| 195.158.226.0/23 | 512 | RIPE NCC | PL | 23rd Apr 2008 |
| 195.158.231.0/24 | 256 | RIPE NCC | GB | 22nd Jan 2024 |
| 195.16.68.0/22 | 1k | RIPE NCC | DE | 20th May 2005 |
| 195.160.0.0/18 | 16.4k | RIPE NCC |  FR | 12th Apr 1996 |
| 195.160.186.0/23 | 512 | RIPE NCC |  NL | 5th Nov 2019 |
| 195.160.96.0/19 | 8.2k | RIPE NCC | FR | 12th Apr 1996 |
| 195.162.2.0/23 | 512 | RIPE NCC | GB | 27th Nov 2008 |
| 195.162.26.0/23 | 512 | RIPE NCC |  KZ | 4th Dec 2008 |
| 195.166.224.0/19 | 8.2k | AFRINIC |  CI | 28th Feb 2020 |
| 195.170.191.0/24 | 256 | RIPE NCC | PL | 11th May 2006 |
| 195.170.212.0/22 | 1k | RIPE NCC | RU | 6th May 1997 |
| 195.177.112.0/23 | 512 | RIPE NCC |  IT | 6th Jun 2018 |
| 195.177.115.0/24 | 256 | RIPE NCC | IT | 6th Jun 2018 |
| 195.177.204.0/23 | 512 | RIPE NCC | RU | 8th Oct 2003 |
| 195.177.210.0/23 | 512 | RIPE NCC | PL | 13th Oct 2003 |
| 195.177.214.0/23 | 512 | RIPE NCC | NL | 22nd Oct 2003 |
| 195.177.218.0/23 | 512 | RIPE NCC |  BG | 15th Oct 2003 |
| 195.177.234.0/23 | 512 | RIPE NCC |  CH | 5th Nov 2003 |
| 195.177.242.0/23 | 512 | RIPE NCC | NL | 12th Nov 2003 |
| 195.177.244.0/23 | 512 | RIPE NCC | DE | 13th Nov 2003 |
| 195.177.254.0/24 | 256 | RIPE NCC | IT | 26th Jun 2023 |
| 195.178.16.0/24 | 256 | RIPE NCC | RU | 23rd Oct 2009 |
| 195.178.20.0/23 | 512 | RIPE NCC | RU | 23rd Oct 2009 |
| 195.178.96.0/23 | 512 | RIPE NCC |  LV | 6th Feb 2006 |
| 195.179.240.0/20 | 4.1k | RIPE NCC | DE | 4th Jul 1997 |
| 195.18.4.0/22 | 1k | RIPE NCC | GB | 2nd Jun 2010 |
| 195.18.9.0/24 | 256 | RIPE NCC |  JO | 13th Aug 2025 |
| 195.180.144.0/21 | 2k | RIPE NCC | DE | 3rd Jul 1996 |
| 195.180.160.0/20 | 4.1k | RIPE NCC | DE | 3rd Jul 1996 |
| 195.180.176.0/20 | 4.1k | ARIN |  US | 3rd Jun 2024 |
| 195.180.40.0/21 | 2k | RIPE NCC | DE | 3rd Jul 1996 |
| 195.182.160.0/19 | 8.2k | RIPE NCC | GB | 10th Nov 1997 |
| 195.182.21.0/24 | 256 | RIPE NCC | UA | 28th Dec 2005 |