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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.56.156.0/22 | 1k | RIPE NCC |  CH | 1st Sept 1993 |
| 194.56.181.0/24 | 256 | RIPE NCC |  DE | 8th Jan 2025 |
| 194.56.200.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.204.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.206.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.208.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.214.0/24 | 256 | RIPE NCC |  KG | 9th Dec 2024 |
| 194.56.220.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.228.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.231.0/24 | 256 | RIPE NCC |  FR | 1st Sept 1993 |
| 194.56.241.0/24 | 256 | RIPE NCC | FR | 1st Sept 1993 |
| 194.56.242.0/23 | 512 | RIPE NCC |  DK | 25th Oct 2019 |
| 194.56.244.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.246.0/23 | 512 | RIPE NCC | DK | 25th Oct 2019 |
| 194.56.252.0/23 | 512 | RIPE NCC |  GB | 25th Oct 2019 |
| 194.56.254.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.255.0/24 | 256 | RIPE NCC |  SC | 22nd Nov 2019 |
| 194.56.76.0/22 | 1k | RIPE NCC |  AT | 30th Jul 2018 |
| 194.58.128.0/20 | 4.1k | RIPE NCC |  SY | 13th Jun 1994 |
| 194.58.144.0/21 | 2k | RIPE NCC | SY | 13th Jun 1994 |
| 194.58.156.0/22 | 1k | RIPE NCC | SY | 13th Jun 1994 |
| 194.58.16.0/21 | 2k | RIPE NCC | SY | 13th Jun 1994 |
| 194.58.208.0/21 | 2k | RIPE NCC | SY | 13th Jun 1994 |
| 194.58.224.0/20 | 4.1k | RIPE NCC | SY | 13th Jun 1994 |
| 194.58.248.0/21 | 2k | RIPE NCC | SY | 13th Jun 1994 |
| 194.58.48.0/21 | 2k | RIPE NCC | SY | 13th Jun 1994 |
| 194.58.78.0/24 | 256 | RIPE NCC |  RU | 13th Jun 1994 |
| 194.59.143.0/24 | 256 | RIPE NCC | DE | 27th Jul 1994 |
| 194.59.144.0/21 | 2k | RIPE NCC | DE | 27th Jul 1994 |
| 194.59.172.0/22 | 1k | RIPE NCC | DE | 4th Aug 1994 |
| 194.59.189.0/24 | 256 | RIPE NCC | DE | 8th Mar 2007 |
| 194.59.190.0/23 | 512 | RIPE NCC | DE | 8th Mar 2007 |
| 194.59.200.0/22 | 1k | RIPE NCC |  RO | 24th Sept 2018 |
| 194.59.212.0/24 | 256 | RIPE NCC | DE | 25th Jul 1994 |
| 194.59.247.0/24 | 256 | RIPE NCC |  MD | 20th Feb 2023 |
| 194.59.252.0/22 | 1k | RIPE NCC | DE | 31st Jul 2018 |
| 194.59.42.0/23 | 512 | RIPE NCC | DE | 7th Jul 1994 |
| 194.59.60.0/22 | 1k | RIPE NCC | DE | 13th Jul 1994 |
| 194.59.64.0/19 | 8.2k | RIPE NCC | DE | 11th Jul 1994 |
| 194.6.0.0/18 | 16.4k | RIPE NCC | GB | 20th Oct 1993 |
| 194.6.128.0/19 | 8.2k | RIPE NCC | FR | 3rd Jan 1996 |
| 194.6.204.0/22 | 1k | RIPE NCC |  PL | 17th Nov 2005 |
| 194.6.212.0/22 | 1k | RIPE NCC | RO | 21st Nov 2005 |
| 194.6.229.0/24 | 256 | RIPE NCC |  PT | 11th Aug 2004 |
| 194.6.235.0/24 | 256 | RIPE NCC | GB | 17th Aug 2004 |
| 194.6.244.0/24 | 256 | RIPE NCC | GB | 2nd Sept 2004 |
| 194.6.248.0/24 | 256 | RIPE NCC | GB | 3rd Sept 2004 |
| 194.6.251.0/24 | 256 | RIPE NCC | GB | 20th Nov 2019 |
| 194.6.252.0/24 | 256 | RIPE NCC | GB | 20th Nov 2019 |
| 194.6.254.0/24 | 256 | RIPE NCC | GB | 20th Nov 2019 |