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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with unannounced space registered through RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
25,283 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.22.86.0/24 | 256 | RIPE NCC |  GB | 13th Nov 2019 |
| 193.22.92.0/24 | 256 | RIPE NCC |  FR | 22nd Jun 2004 |
| 193.221.204.0/22 | 1k | RIPE NCC |  EE | 18th Sept 2018 |
| 193.221.211.0/24 | 256 | RIPE NCC |  MD | 11th May 2021 |
| 193.221.224.0/19 | 8.2k | RIPE NCC |  BE | 1st Jan 1994 |
| 193.221.84.0/23 | 512 | RIPE NCC | GB | 20th Dec 1993 |
| 193.221.86.0/23 | 512 | RIPE NCC | BE | 20th Dec 1993 |
| 193.221.88.0/22 | 1k | RIPE NCC | BE | 20th Dec 1993 |
| 193.221.92.0/24 | 256 | RIPE NCC | BE | 20th Dec 1993 |
| 193.222.0.0/19 | 8.2k | RIPE NCC |  CH | 1st Sept 1993 |
| 193.222.100.0/22 | 1k | RIPE NCC |  AT | 19th Jul 2018 |
| 193.222.108.0/24 | 256 | RIPE NCC | GB | 14th Jun 2023 |
| 193.222.132.0/24 | 256 | RIPE NCC |  NL | 18th Aug 2005 |
| 193.222.176.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 193.222.184.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 193.222.190.0/24 | 256 | RIPE NCC |  TR | 2nd Jun 2026 |
| 193.222.32.0/20 | 4.1k | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.1.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.104.0/22 | 1k | RIPE NCC | TR | 9th May 2018 |
| 193.223.112.0/20 | 4.1k | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.128.0/19 | 8.2k | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.160.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.168.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.170.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.171.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.172.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.176.0/20 | 4.1k | RIPE NCC | FR | 1st Sept 1993 |
| 193.223.2.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.4.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.8.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 193.227.100.0/24 | 256 | RIPE NCC |  PL | 12th Jan 2007 |
| 193.227.101.0/24 | 256 | RIPE NCC | CH | 30th Aug 2006 |
| 193.227.102.0/24 | 256 | RIPE NCC |  LT | 30th Aug 2006 |
| 193.227.105.0/24 | 256 | RIPE NCC | PL | 30th Aug 2006 |
| 193.227.106.0/24 | 256 | RIPE NCC | GB | 31st Aug 2006 |
| 193.227.118.0/24 | 256 | RIPE NCC | GB | 5th Sept 2006 |
| 193.227.126.0/24 | 256 | RIPE NCC |  SE | 7th Sept 2006 |
| 193.227.132.0/24 | 256 | RIPE NCC |  ES | 14th Jun 2005 |
| 193.227.136.0/21 | 2k | RIPE NCC | FR | 5th Aug 1996 |
| 193.227.200.0/23 | 512 | RIPE NCC | GB | 28th Jan 2000 |
| 193.227.224.0/23 | 512 | RIPE NCC | CH | 3rd Oct 2005 |
| 193.227.226.0/24 | 256 | RIPE NCC | CH | 13th Jul 2026 |
| 193.227.227.0/24 | 256 | RIPE NCC |  US | 17th Jul 2026 |
| 193.227.246.0/23 | 512 | RIPE NCC | GB | 12th Oct 2005 |
| 193.227.254.0/23 | 512 | RIPE NCC |  DE | 18th Oct 2005 |
| 193.228.12.0/22 | 1k | RIPE NCC |  RO | 9th May 2018 |
| 193.228.138.0/24 | 256 | RIPE NCC | FR | 12th May 2021 |
| 193.228.141.0/24 | 256 | RIPE NCC | GB | 10th Jul 2007 |
| 193.228.144.0/24 | 256 | RIPE NCC | FR | 16th Jun 2025 |
| 193.228.147.0/24 | 256 | RIPE NCC | FR | 17th Jul 2007 |