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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.117.75.0/24 | 256 | RIPE NCC |  PT | 13th Oct 2025 |
| 194.117.77.0/24 | 256 | RIPE NCC |  CY | 13th Oct 2025 |
| 194.117.78.0/24 | 256 | RIPE NCC |  CH | 13th Oct 2025 |
| 194.117.79.0/24 | 256 | RIPE NCC |  RO | 13th Oct 2025 |
| 194.117.82.0/24 | 256 | RIPE NCC |  IR | 14th Oct 2025 |
| 194.117.89.0/24 | 256 | RIPE NCC |  RU | 15th Oct 2025 |
| 194.117.90.0/24 | 256 | RIPE NCC | CH | 15th Oct 2025 |
| 194.117.91.0/24 | 256 | RIPE NCC |  DE | 15th Oct 2025 |
| 194.117.93.0/24 | 256 | RIPE NCC | PT | 15th Oct 2025 |
| 194.117.95.0/24 | 256 | RIPE NCC | DE | 15th Oct 2025 |
| 194.117.96.0/19 | 8.2k | RIPE NCC | DE | 2nd Jul 1996 |
| 194.120.116.0/24 | 256 | RIPE NCC | RU | 22nd Nov 2019 |
| 194.120.119.0/24 | 256 | RIPE NCC | DE | 21st Dec 1994 |
| 194.120.231.0/24 | 256 | RIPE NCC |  SE | 21st Dec 1994 |
| 194.120.24.0/24 | 256 | RIPE NCC | RU | 22nd Nov 2019 |
| 194.120.249.0/24 | 256 | RIPE NCC | DE | 21st Dec 1994 |
| 194.121.49.0/24 | 256 | RIPE NCC |  US | 31st Jul 1995 |
| 194.121.56.0/24 | 256 | RIPE NCC | DE | 31st Jul 1995 |
| 194.124.0.0/19 | 8.2k | RIPE NCC | CH | 1st Sept 1993 |
| 194.124.160.0/21 | 2k | RIPE NCC |  FR | 1st Sept 1993 |
| 194.124.168.0/21 | 2k | RIPE NCC |  NL | 1st Sept 1993 |
| 194.124.212.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.124.226.0/24 | 256 | RIPE NCC | DE | 1st Sept 1993 |
| 194.124.238.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.124.242.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.124.243.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.124.246.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.124.253.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.124.44.0/22 | 1k | RIPE NCC | DE | 31st Oct 2018 |
| 194.126.132.0/22 | 1k | RIPE NCC |  LU | 28th May 2018 |
| 194.126.150.0/23 | 512 | RIPE NCC |  IE | 10th May 2005 |
| 194.126.188.0/22 | 1k | RIPE NCC |  GB | 22nd Sept 2006 |
| 194.126.210.0/24 | 256 | RIPE NCC |  PL | 4th Feb 2005 |
| 194.126.215.0/24 | 256 | RIPE NCC |  HK | 22nd Nov 2019 |
| 194.126.219.0/24 | 256 | RIPE NCC | HK | 22nd Nov 2019 |
| 194.126.221.0/24 | 256 | RIPE NCC | PL | 10th Feb 2005 |
| 194.126.224.0/24 | 256 | RIPE NCC |  UA | 11th Feb 2005 |
| 194.126.234.0/24 | 256 | RIPE NCC |  DK | 17th Feb 2005 |
| 194.126.240.0/24 | 256 | RIPE NCC | IE | 22nd Feb 2005 |
| 194.126.243.0/24 | 256 | RIPE NCC | DE | 22nd Feb 2005 |
| 194.126.247.0/24 | 256 | RIPE NCC | GB | 24th Feb 2005 |
| 194.126.254.0/24 | 256 | RIPE NCC | PL | 23rd Feb 2009 |
| 194.126.255.0/24 | 256 | RIPE NCC |  GR | 3rd Mar 2005 |
| 194.127.123.0/24 | 256 | RIPE NCC | DE | 31st Jan 1995 |
| 194.127.124.0/22 | 1k | RIPE NCC | DE | 31st Jan 1995 |
| 194.127.128.0/24 | 256 | RIPE NCC | DE | 2nd Feb 1995 |
| 194.127.144.0/21 | 2k | RIPE NCC | DE | 6th Feb 1995 |
| 194.127.154.0/23 | 512 | RIPE NCC | GB | 9th Feb 1995 |
| 194.127.161.0/24 | 256 | RIPE NCC | DE | 14th Feb 1995 |
| 194.127.203.0/24 | 256 | RIPE NCC | DE | 27th Feb 1995 |