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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.9.246.0/23 | 512 | RIPE NCC |  US | 2nd Nov 1999 |
| 194.9.248.0/24 | 256 | RIPE NCC | US | 2nd Nov 1999 |
| 194.9.249.0/24 | 256 | RIPE NCC | US | 2nd Nov 1999 |
| 194.9.250.0/23 | 512 | RIPE NCC | US | 2nd Nov 1999 |
| 194.9.252.0/22 | 1k | RIPE NCC | US | 2nd Nov 1999 |
| 194.9.28.0/24 | 256 | RIPE NCC |  GB | 15th Aug 2006 |
| 194.9.34.0/23 | 512 | RIPE NCC |  CH | 17th Aug 2006 |
| 194.9.40.0/23 | 512 | RIPE NCC | GB | 23rd Aug 2006 |
| 194.93.101.0/24 | 256 | RIPE NCC |  NL | 21st Aug 1996 |
| 194.93.102.0/24 | 256 | RIPE NCC | NL | 21st Aug 1996 |
| 194.93.104.0/21 | 2k | RIPE NCC |  DE | 22nd Jul 1996 |
| 194.93.123.0/26 | 64 | RIPE NCC |  QA | 31st Mar 2025 |
| 194.93.123.128/25 | 128 | RIPE NCC | DE | 18th Aug 2010 |
| 194.93.123.64/26 | 64 | RIPE NCC |  GR | 16th Jun 2025 |
| 194.93.192.0/18 | 16.4k | RIPE NCC | US | 20th Oct 1994 |
| 194.93.36.0/22 | 1k | RIPE NCC |  RO | 30th Nov 2018 |
| 194.93.64.0/22 | 1k | RIPE NCC |  EE | 1st Aug 2018 |
| 194.93.72.0/24 | 256 | RIPE NCC |  FI | 22nd Nov 2019 |
| 194.93.73.0/24 | 256 | RIPE NCC |  SE | 11th Jan 1995 |
| 194.93.88.0/22 | 1k | RIPE NCC | SE | 5th Dec 1994 |
| 194.93.92.0/22 | 1k | RIPE NCC | GB | 18th Nov 1994 |
| 194.99.100.0/22 | 1k | RIPE NCC |  FR | 23rd May 2018 |
| 194.99.157.0/24 | 256 | RIPE NCC |  LU | 20th Jul 2021 |
| 194.99.28.0/22 | 1k | RIPE NCC |  SK | 25th Sept 2018 |
| 194.99.32.0/24 | 256 | RIPE NCC | DE | 19th Oct 1994 |
| 194.99.33.0/24 | 256 | RIPE NCC | FI | 22nd Nov 2019 |
| 194.99.34.0/24 | 256 | RIPE NCC | DE | 20th Oct 1994 |
| 194.99.36.0/23 | 512 | RIPE NCC | DE | 24th Oct 1994 |
| 194.99.38.0/23 | 512 | RIPE NCC | FR | 28th Oct 2019 |
| 194.99.50.0/23 | 512 | RIPE NCC | FR | 28th Oct 2019 |
| 194.99.53.0/24 | 256 | RIPE NCC | DE | 28th Oct 1994 |
| 194.99.54.0/23 | 512 | RIPE NCC | DE | 28th Oct 1994 |
| 194.99.56.0/24 | 256 | RIPE NCC | DE | 31st Oct 1994 |
| 194.99.64.0/24 | 256 | RIPE NCC | GB | 8th Mar 2023 |
| 194.99.66.0/23 | 512 | RIPE NCC |  AT | 28th Oct 2019 |
| 194.99.68.0/23 | 512 | RIPE NCC | DE | 4th Nov 1994 |
| 194.99.70.0/23 | 512 | RIPE NCC | DE | 8th Nov 1994 |
| 194.99.75.0/24 | 256 | RIPE NCC | DE | 8th Nov 1994 |
| 194.99.76.0/23 | 512 | RIPE NCC | DE | 8th Nov 1994 |
| 194.99.8.0/22 | 1k | RIPE NCC | FR | 23rd May 2018 |
| 194.99.83.0/24 | 256 | RIPE NCC | DE | 9th Nov 1994 |
| 194.99.90.0/24 | 256 | RIPE NCC | DE | 10th Nov 1994 |
| 194.99.98.0/23 | 512 | RIPE NCC | DE | 10th Nov 1994 |
| 195.10.194.0/24 | 256 | RIPE NCC |  IL | 19th Oct 2005 |
| 195.10.211.0/24 | 256 | RIPE NCC | SE | 28th Oct 2005 |
| 195.10.217.0/24 | 256 | RIPE NCC |  MT | 11th Aug 2010 |
| 195.10.228.0/22 | 1k | RIPE NCC | NL | 14th Nov 1997 |
| 195.10.234.0/23 | 512 | RIPE NCC | GB | 14th Nov 1997 |
| 195.10.236.0/22 | 1k | RIPE NCC | GB | 14th Nov 1997 |
| 195.10.240.0/20 | 4.1k | RIPE NCC | GB | 14th Nov 1997 |