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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,738 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 92.243.81.0/24 | 256 | RIPE NCC |  PT | 15th Jan 2008 |
| 92.245.160.0/22 | 1k | RIPE NCC |  IT | 18th Feb 2008 |
| 92.246.132.0/22 | 1k | RIPE NCC |  AM | 22nd Apr 2008 |
| 92.249.5.0/24 | 256 | RIPE NCC |  GI | 4th May 2020 |
| 92.250.128.0/17 | 32.8k | RIPE NCC |  LU | 21st Nov 2007 |
| 92.255.11.0/24 | 256 | RIPE NCC |  RU | 24th Dec 2007 |
| 92.255.18.0/23 | 512 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.20.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.21.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.22.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.23.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.30.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.57.0/24 | 256 | RIPE NCC |  HK | 24th Dec 2007 |
| 92.255.61.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.72.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.255.85.0/24 | 256 | RIPE NCC | HK | 24th Dec 2007 |
| 92.255.9.0/24 | 256 | RIPE NCC | RU | 24th Dec 2007 |
| 92.42.103.0/24 | 256 | RIPE NCC |  QA | 12th Jan 2024 |
| 92.42.152.0/21 | 2k | RIPE NCC |  SE | 17th Dec 2007 |
| 92.42.168.0/21 | 2k | RIPE NCC |  GB | 18th Dec 2007 |
| 92.42.204.0/24 | 256 | RIPE NCC |  TR | 30th Jul 2025 |
| 92.42.224.0/21 | 2k | RIPE NCC |  DE | 24th Dec 2007 |
| 92.42.3.0/24 | 256 | RIPE NCC |  CH | 3rd May 2023 |
| 92.42.5.0/24 | 256 | RIPE NCC |  NL | 5th May 2023 |
| 92.43.16.0/21 | 2k | RIPE NCC | DE | 3rd Jan 2008 |
| 92.43.40.0/21 | 2k | RIPE NCC | GB | 4th Jan 2008 |
| 92.53.160.0/24 | 256 | RIPE NCC | TR | 15th Feb 2008 |
| 92.53.164.0/22 | 1k | RIPE NCC |  SI | 15th Feb 2008 |
| 92.53.168.0/21 | 2k | RIPE NCC | SI | 15th Feb 2008 |
| 92.6.0.0/15 | 131k | RIPE NCC | SE | 28th Jun 2007 |
| 92.60.56.0/21 | 2k | RIPE NCC |  SK | 30th Nov 2007 |
| 92.61.144.0/20 | 4.1k | RIPE NCC | SE | 21st Dec 2007 |
| 92.8.0.0/15 | 131k | ARIN |  US | 3rd Mar 2025 |
| 93.113.108.0/24 | 256 | RIPE NCC | TR | 21st Dec 2007 |
| 93.113.128.0/24 | 256 | RIPE NCC | DE | 21st Dec 2007 |
| 93.113.129.0/24 | 256 | RIPE NCC |  IM | 21st Dec 2007 |
| 93.113.134.0/23 | 512 | RIPE NCC |  RO | 21st Dec 2007 |
| 93.113.152.0/23 | 512 | RIPE NCC | RO | 21st Dec 2007 |
| 93.113.16.0/21 | 2k | RIPE NCC |  ES | 21st Dec 2007 |
| 93.113.168.0/23 | 512 | RIPE NCC | RO | 21st Dec 2007 |
| 93.113.170.0/24 | 256 | RIPE NCC | LU | 21st Dec 2007 |
| 93.113.172.0/23 | 512 | RIPE NCC | RO | 21st Dec 2007 |
| 93.113.213.0/24 | 256 | RIPE NCC | NL | 21st Dec 2007 |
| 93.113.222.0/23 | 512 | RIPE NCC | RO | 21st Dec 2007 |
| 93.113.244.0/22 | 1k | RIPE NCC |  MD | 21st Dec 2007 |
| 93.113.248.0/23 | 512 | RIPE NCC | RO | 21st Dec 2007 |
| 93.113.46.0/24 | 256 | RIPE NCC | IT | 21st Dec 2007 |
| 93.113.80.0/21 | 2k | RIPE NCC | MD | 21st Dec 2007 |
| 93.113.88.0/24 | 256 | RIPE NCC | TR | 21st Dec 2007 |
| 93.113.92.0/22 | 1k | RIPE NCC | MD | 21st Dec 2007 |