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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,650 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 87.230.80.0/23 | 512 | RIPE NCC |  DE | 25th Jul 2005 |
| 87.232.192.0/24 | 256 | RIPE NCC |  IE | 1st Jul 2005 |
| 87.232.194.0/23 | 512 | RIPE NCC | IE | 1st Jul 2005 |
| 87.232.196.0/22 | 1k | RIPE NCC | IE | 1st Jul 2005 |
| 87.236.163.0/24 | 256 | RIPE NCC |  NL | 19th Aug 2021 |
| 87.236.165.0/24 | 256 | RIPE NCC |  GB | 19th Aug 2021 |
| 87.236.178.0/23 | 512 | RIPE NCC |  CH | 31st Aug 2005 |
| 87.236.36.0/24 | 256 | RIPE NCC |  PL | 8th Mar 2023 |
| 87.236.40.0/21 | 2k | RIPE NCC |  RU | 21st Jul 2005 |
| 87.236.87.0/24 | 256 | RIPE NCC | RU | 12th Aug 2005 |
| 87.237.165.0/24 | 256 | RIPE NCC | DE | 8th May 2020 |
| 87.237.48.0/22 | 1k | RIPE NCC | GB | 26th Jun 2018 |
| 87.237.88.0/21 | 2k | RIPE NCC | DE | 10th Nov 2005 |
| 87.238.227.0/24 | 256 | RIPE NCC |  BE | 24th Jan 2006 |
| 87.239.224.0/21 | 2k | RIPE NCC | CH | 30th Mar 2006 |
| 87.239.34.0/24 | 256 | RIPE NCC | RU | 22nd Sept 2009 |
| 87.239.48.0/22 | 1k | RIPE NCC |  AT | 21st Jun 2018 |
| 87.239.72.0/21 | 2k | RIPE NCC | PL | 24th Nov 2005 |
| 87.242.66.0/24 | 256 | RIPE NCC | RU | 22nd Jul 2005 |
| 87.243.16.0/20 | 4.1k | RIPE NCC |  KZ | 8th Jul 2010 |
| 87.243.64.0/20 | 4.1k | RIPE NCC |  BG | 27th Jul 2006 |
| 87.247.240.0/21 | 2k | RIPE NCC | DE | 3rd Feb 2006 |
| 87.248.192.0/19 | 8.2k | RIPE NCC |  US | 22nd Aug 2005 |
| 87.249.60.0/24 | 256 | RIPE NCC | RU | 25th Aug 2005 |
| 87.252.112.0/21 | 2k | RIPE NCC | GB | 21st Sept 2005 |
| 87.252.120.0/22 | 1k | RIPE NCC | DE | 21st Sept 2005 |
| 87.252.124.0/23 | 512 | RIPE NCC | DE | 21st Sept 2005 |
| 87.253.176.0/21 | 2k | RIPE NCC | DE | 6th Oct 2005 |
| 87.255.96.0/19 | 8.2k | AFRINIC |  KE | 8th Nov 2005 |
| 88.104.0.0/13 | 524k | ARIN | US | 20th Dec 2023 |
| 88.135.34.0/23 | 512 | RIPE NCC |  IR | 16th Nov 2009 |
| 88.144.0.0/15 | 131k | RIPE NCC |  SE | 18th Nov 2005 |
| 88.151.104.0/21 | 2k | RIPE NCC | RU | 28th Feb 2006 |
| 88.151.113.0/24 | 256 | RIPE NCC |  UA | 25th Apr 2022 |
| 88.210.28.0/24 | 256 | RIPE NCC | RU | 24th Nov 2005 |
| 88.210.51.0/24 | 256 | RIPE NCC | RU | 24th Nov 2005 |
| 88.210.7.0/24 | 256 | RIPE NCC | RU | 24th Nov 2005 |
| 88.218.124.0/22 | 1k | RIPE NCC | BE | 17th Dec 2018 |
| 88.218.176.0/22 | 1k | RIPE NCC |  DK | 17th Dec 2018 |
| 88.218.244.0/22 | 1k | RIPE NCC | RU | 18th Dec 2018 |
| 88.218.36.0/22 | 1k | RIPE NCC | IE | 14th Dec 2018 |
| 88.218.88.0/22 | 1k | RIPE NCC | GB | 14th Dec 2018 |
| 88.80.192.0/19 | 8.2k | RIPE NCC | DE | 1st Dec 2005 |
| 88.80.4.0/22 | 1k | RIPE NCC | SE | 24th Nov 2005 |
| 88.81.32.0/19 | 8.2k | RIPE NCC | RU | 2nd Oct 2009 |
| 88.82.128.0/19 | 8.2k | RIPE NCC | GB | 21st Dec 2005 |
| 88.82.224.0/19 | 8.2k | RIPE NCC | DE | 27th Dec 2005 |
| 89.104.107.0/24 | 256 | RIPE NCC | RU | 9th Mar 2006 |
| 89.104.119.0/24 | 256 | RIPE NCC | RU | 9th Mar 2006 |
| 89.104.125.0/24 | 256 | RIPE NCC | RU | 9th Mar 2006 |