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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
24,902 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 66.132.196.0/23 | 512 | RIPE NCC |  US | 8th Aug 2003 |
| 66.132.200.0/23 | 512 | RIPE NCC | US | 8th Aug 2003 |
| 66.132.210.0/23 | 512 | RIPE NCC | US | 8th Aug 2003 |
| 66.132.234.0/23 | 512 | RIPE NCC | US | 8th Aug 2003 |
| 66.132.252.0/23 | 512 | RIPE NCC | US | 8th Aug 2003 |
| 66.155.64.0/22 | 1k | RIPE NCC | US | 27th Jul 2001 |
| 66.179.169.0/24 | 256 | RIPE NCC | US | 9th Oct 2001 |
| 66.179.174.0/24 | 256 | RIPE NCC | US | 9th Oct 2001 |
| 66.186.194.0/23 | 512 | RIPE NCC |  AL | 9th Nov 2001 |
| 66.234.10.0/23 | 512 | RIPE NCC | US | 20th Feb 2002 |
| 66.234.12.0/23 | 512 | RIPE NCC | US | 20th Feb 2002 |
| 66.234.128.0/20 | 4.1k | RIPE NCC |  IE | 26th Feb 2002 |
| 66.242.48.0/23 | 512 | RIPE NCC |  GB | 4th Mar 2002 |
| 66.255.200.0/22 | 1k | RIPE NCC | IE | 9th Feb 2004 |
| 66.45.120.0/21 | 2k | RIPE NCC |  ES | 15th Nov 2000 |
| 67.158.62.0/24 | 256 | RIPE NCC | IE | 1st Apr 2010 |
| 67.231.176.0/20 | 4.1k | RIPE NCC |  IT | 26th May 2009 |
| 68.67.120.0/24 | 256 | RIPE NCC |  NL | 22nd Jun 2009 |
| 69.48.145.0/24 | 256 | RIPE NCC |  TR | 16th Sept 2026 |
| 69.5.189.0/24 | 256 | RIPE NCC | NL | 5th Oct 2026 |
| 69.90.116.0/22 | 1k | RIPE NCC | US | 6th Nov 2003 |
| 69.90.156.0/22 | 1k | RIPE NCC | US | 6th Nov 2003 |
| 69.90.32.0/22 | 1k | RIPE NCC | US | 6th Nov 2003 |
| 72.4.80.0/21 | 2k | RIPE NCC |  HK | 1st Nov 2004 |
| 74.119.192.0/22 | 1k | RIPE NCC |  MD | 16th Nov 2009 |
| 74.122.24.0/24 | 256 | RIPE NCC |  DE | 12th Jul 2019 |
| 74.209.175.0/24 | 256 | RIPE NCC | GB | 19th May 2009 |
| 77.105.164.0/24 | 256 | RIPE NCC |  AM | 6th Dec 2006 |
| 77.232.64.0/19 | 8.2k | RIPE NCC |  SE | 12th Dec 2006 |
| 77.233.128.0/19 | 8.2k | RIPE NCC | GB | 19th Dec 2006 |
| 77.236.100.0/22 | 1k | RIPE NCC |  FR | 29th Jan 2007 |
| 77.241.72.0/22 | 1k | RIPE NCC | TR | 4th Oct 2018 |
| 77.243.156.0/22 | 1k | RIPE NCC | SE | 14th Mar 2007 |
| 77.243.192.0/20 | 4.1k | RIPE NCC | ES | 16th Mar 2007 |
| 77.243.240.0/20 | 4.1k | RIPE NCC |  RU | 20th Mar 2007 |
| 77.243.92.0/22 | 1k | RIPE NCC |  AT | 9th Aug 2018 |
| 77.244.160.0/20 | 4.1k | RIPE NCC | RU | 3rd Apr 2007 |
| 77.246.240.0/24 | 256 | RIPE NCC |  CY | 11th Aug 2021 |
| 77.246.245.0/24 | 256 | RIPE NCC | NL | 11th Aug 2021 |
| 77.247.110.0/24 | 256 | RIPE NCC |  EE | 3rd Oct 2018 |
| 77.247.112.0/22 | 1k | RIPE NCC |  RO | 3rd Oct 2018 |
| 77.247.194.0/24 | 256 | RIPE NCC | RO | 8th Mar 2023 |
| 77.72.152.0/21 | 2k | RIPE NCC | NL | 14th Feb 2007 |
| 77.72.200.0/21 | 2k | RIPE NCC | GB | 19th Feb 2007 |
| 77.72.24.0/21 | 2k | RIPE NCC | ES | 17th Jan 2007 |
| 77.72.8.0/21 | 2k | RIPE NCC | DE | 16th Jan 2007 |
| 77.73.112.0/24 | 256 | RIPE NCC | TR | 19th Jan 2026 |
| 77.73.115.0/24 | 256 | RIPE NCC |  RS | 19th Jan 2026 |
| 77.73.116.0/24 | 256 | RIPE NCC | FR | 19th Jan 2026 |
| 77.73.118.0/24 | 256 | RIPE NCC | ES | 19th Jan 2026 |