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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,709 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 95.156.248.0/23 | 512 | RIPE NCC |  IR | 27th Mar 2009 |
| 95.161.136.0/22 | 1k | RIPE NCC |  AG | 23rd Dec 2008 |
| 95.163.146.0/23 | 512 | RIPE NCC |  RU | 30th Dec 2008 |
| 95.170.32.0/19 | 8.2k | RIPE NCC |  FR | 2nd Feb 2009 |
| 95.172.32.0/20 | 4.1k | RIPE NCC | RU | 26th Feb 2009 |
| 95.172.80.0/23 | 512 | RIPE NCC |  GB | 26th Feb 2009 |
| 95.174.128.0/19 | 8.2k | RIPE NCC |  DE | 23rd Mar 2009 |
| 95.175.140.0/24 | 256 | RIPE NCC | GB | 3rd Apr 2009 |
| 95.175.142.0/23 | 512 | RIPE NCC | GB | 3rd Apr 2009 |
| 95.175.144.0/23 | 512 | RIPE NCC | FR | 3rd Apr 2009 |
| 95.175.151.0/24 | 256 | RIPE NCC | GB | 3rd Apr 2009 |
| 95.178.0.0/21 | 2k | RIPE NCC |  PL | 15th Jan 2009 |
| 95.178.104.0/23 | 512 | RIPE NCC | PL | 15th Jan 2009 |
| 95.178.36.0/24 | 256 | RIPE NCC |  ES | 15th Jan 2009 |
| 95.178.38.0/24 | 256 | RIPE NCC | ES | 15th Jan 2009 |
| 95.178.40.0/21 | 2k | RIPE NCC | PL | 15th Jan 2009 |
| 95.178.92.0/22 | 1k | RIPE NCC | PL | 15th Jan 2009 |
| 95.178.96.0/21 | 2k | RIPE NCC | PL | 15th Jan 2009 |
| 95.181.198.0/24 | 256 | RIPE NCC | RU | 2nd Feb 2009 |
| 95.183.48.0/20 | 4.1k | RIPE NCC |  CH | 10th Feb 2009 |
| 95.214.128.0/22 | 1k | RIPE NCC | DE | 24th Dec 2018 |
| 95.214.16.0/22 | 1k | RIPE NCC |  NL | 21st Dec 2018 |
| 95.214.200.0/22 | 1k | RIPE NCC | DE | 27th Dec 2018 |
| 95.214.248.0/22 | 1k | RIPE NCC |  CY | 28th Dec 2018 |
| 95.214.48.0/22 | 1k | RIPE NCC | NL | 21st Dec 2018 |
| 95.215.12.0/22 | 1k | RIPE NCC | RU | 10th Feb 2009 |
| 95.215.152.0/22 | 1k | RIPE NCC | RU | 5th Mar 2009 |
| 95.215.40.0/22 | 1k | RIPE NCC |  UA | 18th Jul 2012 |
| 95.215.88.0/22 | 1k | RIPE NCC | GB | 26th Feb 2009 |
| 95.36.0.0/20 | 4.1k | RIPE NCC | NL | 18th Nov 2008 |
| 95.36.100.0/22 | 1k | RIPE NCC | CH | 18th Nov 2008 |
| 95.36.104.0/21 | 2k | RIPE NCC | NL | 18th Nov 2008 |
| 95.36.112.0/20 | 4.1k | RIPE NCC | NL | 18th Nov 2008 |
| 95.36.128.0/18 | 16.4k | RIPE NCC | GB | 18th Nov 2008 |
| 95.36.192.0/18 | 16.4k | RIPE NCC | NL | 18th Nov 2008 |
| 95.36.64.0/21 | 2k | RIPE NCC | NL | 18th Nov 2008 |
| 95.87.96.0/21 | 2k | RIPE NCC | GB | 8th Sept 2011 |
| 96.125.144.0/20 | 4.1k | RIPE NCC | DE | 13th Mar 2015 |
| 96.126.192.0/18 | 16.4k | ARIN |  US | 17th May 2011 |
| 96.126.68.0/24 | 256 | ARIN | US | 19th Jul 2016 |
| 96.24.0.0/15 | 131k | ARIN | US | 6th Nov 2007 |
| 96.26.0.0/16 | 65.5k | ARIN | US | 6th Nov 2007 |
| 96.31.128.0/19 | 8.2k | ARIN | US | 29th Dec 2008 |
| 96.45.48.0/22 | 1k | ARIN |  CA | 3rd Oct 2025 |
| 96.45.60.0/22 | 1k | ARIN | US | 6th Oct 2025 |
| 96.47.168.0/22 | 1k | ARIN | US | 3rd Apr 2025 |
| 97.107.232.0/22 | 1k | ARIN | US | 21st Sept 2016 |
| 97.64.100.0/22 | 1k | ARIN | US | 8th Apr 2009 |
| 97.64.88.0/22 | 1k | ARIN | US | 3rd Jul 2017 |
| 97.64.92.0/24 | 256 | ARIN | US | 29th Nov 2017 |