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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.56.242.0/23 | 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 |
| 194.6.64.0/19 | 8.2k | RIPE NCC | GB | 29th Apr 1996 |
| 194.60.128.0/22 | 1k | RIPE NCC | GB | 15th Jun 1994 |
| 194.60.144.0/20 | 4.1k | RIPE NCC | GB | 16th Jun 1994 |
| 194.60.216.0/24 | 256 | RIPE NCC | GB | 12th Jul 1994 |
| 194.60.217.0/24 | 256 | RIPE NCC | CH | 23rd Nov 2006 |
| 194.60.220.0/22 | 1k | RIPE NCC | GB | 12th Jul 1994 |
| 194.60.224.0/23 | 512 | RIPE NCC | GB | 1st Jul 1994 |
| 194.60.226.0/23 | 512 | RIPE NCC | PL | 2nd Nov 2011 |
| 194.60.244.0/23 | 512 | RIPE NCC |  AE | 3rd Nov 2011 |
| 194.60.246.0/24 | 256 | RIPE NCC | RU | 3rd Nov 2011 |
| 194.60.247.0/24 | 256 | RIPE NCC | RU | 4th Nov 2011 |