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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,296 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.88.192.0/23 | 512 | RIPE NCC |  CH | 23rd Aug 2005 |
| 194.88.2.0/24 | 256 | RIPE NCC |  NL | 30th Sept 2010 |
| 194.88.228.0/23 | 512 | RIPE NCC |  BG | 5th Jul 2006 |
| 194.88.230.0/23 | 512 | RIPE NCC | NL | 6th Jul 2006 |
| 194.88.27.0/24 | 256 | RIPE NCC |  DE | 5th Nov 1996 |
| 194.9.117.0/24 | 256 | RIPE NCC | DE | 28th Oct 1998 |
| 194.9.12.0/23 | 512 | RIPE NCC | CH | 28th Jul 2006 |
| 194.9.160.0/22 | 1k | RIPE NCC | DE | 14th Aug 1998 |
| 194.9.240.0/24 | 256 | RIPE NCC |  US | 2nd Nov 1999 |
| 194.9.241.0/24 | 256 | RIPE NCC | US | 2nd Nov 1999 |
| 194.9.243.0/24 | 256 | RIPE NCC | US | 2nd Nov 1999 |
| 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 |