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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.57.92.0/24 | 256 | RIPE NCC |  FR | 2nd Jul 1993 |
| 193.57.97.0/24 | 256 | RIPE NCC |  DE | 9th Sept 1994 |
| 193.57.98.0/23 | 512 | RIPE NCC |  NO | 10th Oct 2019 |
| 193.58.0.0/27 | 32 | RIPE NCC |  CY | 14th Sept 2012 |
| 193.58.0.128/25 | 128 | RIPE NCC | CY | 14th Sept 2012 |
| 193.58.0.32/28 | 16 | RIPE NCC | CY | 14th Sept 2012 |
| 193.58.0.64/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 193.58.118.0/24 | 256 | RIPE NCC |  PT | 15th Jan 2024 |
| 193.58.128.0/23 | 512 | RIPE NCC |  BE | 11th Jul 1994 |
| 193.58.132.0/22 | 1k | RIPE NCC | DE | 2nd May 2018 |
| 193.58.136.0/21 | 2k | RIPE NCC |  CH | 11th Jul 1994 |
| 193.58.173.0/24 | 256 | RIPE NCC | FR | 15th Nov 2019 |
| 193.58.188.0/22 | 1k | RIPE NCC | DE | 13th Sept 2018 |
| 193.58.198.0/23 | 512 | RIPE NCC | FR | 3rd Jun 1997 |
| 193.58.209.0/24 | 256 | RIPE NCC | CH | 30th Sept 1997 |
| 193.58.210.0/23 | 512 | RIPE NCC |  AT | 15th Oct 1997 |
| 193.58.212.0/22 | 1k | RIPE NCC | AT | 15th Oct 1997 |
| 193.58.232.0/24 | 256 | RIPE NCC |  PL | 4th Apr 2005 |
| 193.58.236.0/24 | 256 | RIPE NCC |  TR | 7th Apr 2005 |
| 193.58.237.0/24 | 256 | RIPE NCC | FR | 15th Nov 2019 |
| 193.58.239.0/24 | 256 | RIPE NCC | CH | 7th Apr 2005 |
| 193.58.248.0/23 | 512 | RIPE NCC | FR | 10th Oct 2019 |
| 193.58.254.0/24 | 256 | RIPE NCC |  NL | 15th Nov 2019 |
| 193.58.32.0/22 | 1k | RIPE NCC | BE | 11th Jul 1994 |
| 193.58.92.0/22 | 1k | RIPE NCC | BE | 11th Jul 1994 |
| 193.7.0.0/17 | 32.8k | RIPE NCC | DE | 4th Jan 1994 |
| 193.7.185.0/24 | 256 | RIPE NCC | DE | 4th Dec 2003 |
| 193.7.186.0/23 | 512 | RIPE NCC | DE | 4th Dec 2003 |
| 193.7.188.0/22 | 1k | RIPE NCC | DE | 4th Dec 2003 |
| 193.73.238.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.73.251.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.8.10.0/23 | 512 | RIPE NCC | FR | 1st Sept 1993 |
| 193.8.142.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.8.165.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.8.188.0/23 | 512 | RIPE NCC | DE | 1st Sept 1993 |
| 193.8.192.0/24 | 256 | RIPE NCC | DE | 13th Nov 2019 |
| 193.8.193.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.8.198.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 193.8.2.0/23 | 512 | RIPE NCC | PL | 4th Oct 2019 |
| 193.8.200.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.8.202.0/24 | 256 | RIPE NCC | DE | 13th Nov 2019 |
| 193.8.204.0/24 | 256 | RIPE NCC | FR | 1st Sept 1993 |
| 193.8.205.0/24 | 256 | RIPE NCC | DE | 13th Nov 2019 |
| 193.8.212.0/24 | 256 | RIPE NCC | DE | 13th Nov 2019 |
| 193.8.214.0/24 | 256 | RIPE NCC | DE | 1st Sept 1993 |
| 193.8.228.0/23 | 512 | RIPE NCC |  GB | 4th Oct 2019 |
| 193.8.230.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.8.232.0/23 | 512 | RIPE NCC | GB | 4th Oct 2019 |
| 193.8.238.0/24 | 256 | RIPE NCC |  SC | 13th Nov 2019 |
| 193.8.248.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |