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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,283 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.200.58.0/23 | 512 | RIPE NCC |  FR | 23rd Mar 2007 |
| 193.200.70.0/23 | 512 | RIPE NCC |  NL | 1st Mar 2007 |
| 193.200.79.0/24 | 256 | RIPE NCC |  CH | 6th Mar 2024 |
| 193.201.100.0/24 | 256 | RIPE NCC |  UA | 18th Jun 2002 |
| 193.201.101.0/24 | 256 | RIPE NCC |  SI | 19th Jun 2002 |
| 193.201.103.0/24 | 256 | RIPE NCC | FR | 19th Jun 2002 |
| 193.201.104.0/24 | 256 | RIPE NCC | NL | 20th Jun 2002 |
| 193.201.108.0/24 | 256 | RIPE NCC |  ES | 27th Jun 2002 |
| 193.201.140.0/22 | 1k | RIPE NCC |  GB | 11th Jul 2002 |
| 193.201.144.0/25 | 128 | RIPE NCC |  PL | 21st Mar 2011 |
| 193.201.144.128/25 | 128 | RIPE NCC |  FI | 4th Sept 2002 |
| 193.201.145.0/25 | 128 | RIPE NCC | FI | 3rd Sept 2009 |
| 193.201.145.128/26 | 64 | RIPE NCC |  DE | 11th Dec 2024 |
| 193.201.145.192/26 | 64 | RIPE NCC | DE | 12th Dec 2024 |
| 193.201.146.0/25 | 128 | RIPE NCC | FR | 23rd Dec 2003 |
| 193.201.146.128/25 | 128 | RIPE NCC |  RO | 14th Jul 2010 |
| 193.201.147.0/26 | 64 | RIPE NCC |  IL | 16th May 2025 |
| 193.201.147.160/27 | 32 | RIPE NCC |  CY | 14th Sept 2012 |
| 193.201.147.224/27 | 32 | RIPE NCC |  US | 29th Jun 2004 |
| 193.201.147.64/27 | 32 | RIPE NCC | NL | 4th Jul 2003 |
| 193.201.148.0/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 193.201.148.128/26 | 64 | RIPE NCC |  SE | 29th Sept 2023 |
| 193.201.148.192/26 | 64 | RIPE NCC | NL | 27th Aug 2010 |
| 193.201.148.64/26 | 64 | RIPE NCC | DE | 9th May 2003 |
| 193.201.149.0/26 | 64 | RIPE NCC | DE | 3rd Jul 2023 |
| 193.201.149.128/26 | 64 | RIPE NCC | GB | 25th Feb 2026 |
| 193.201.149.192/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 193.201.149.64/26 | 64 | RIPE NCC | PL | 12th May 2010 |
| 193.201.150.0/26 | 64 | RIPE NCC | US | 29th Jun 2004 |
| 193.201.150.128/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 193.201.150.192/26 | 64 | RIPE NCC | CH | 9th Nov 2023 |
| 193.201.150.64/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 193.201.151.0/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 193.201.151.128/26 | 64 | RIPE NCC | GB | 1st Feb 2024 |
| 193.201.151.192/26 | 64 | RIPE NCC | DE | 4th Jul 2005 |
| 193.201.151.64/26 | 64 | RIPE NCC | DE | 24th Jan 2024 |
| 193.201.152.0/25 | 128 | RIPE NCC |  RU | 28th Mar 2003 |
| 193.201.152.128/25 | 128 | RIPE NCC | UA | 27th Nov 2003 |
| 193.201.154.0/25 | 128 | RIPE NCC | GB | 4th Dec 2003 |
| 193.201.154.128/25 | 128 | RIPE NCC | RO | 11th Apr 2005 |
| 193.201.155.0/26 | 64 | RIPE NCC |  LB | 7th Nov 2025 |
| 193.201.155.128/25 | 128 | RIPE NCC | IL | 15th Apr 2004 |
| 193.201.155.64/26 | 64 | RIPE NCC |  SA | 31st Dec 2024 |
| 193.201.156.0/25 | 128 | RIPE NCC | RU | 3rd Jun 2004 |
| 193.201.156.128/25 | 128 | RIPE NCC | SE | 17th May 2004 |
| 193.201.157.0/25 | 128 | RIPE NCC | CY | 14th Sept 2012 |
| 193.201.157.128/26 | 64 | RIPE NCC | NL | 29th Jan 2025 |
| 193.201.157.192/26 | 64 | RIPE NCC | FR | 26th Feb 2025 |
| 193.201.160.0/24 | 256 | RIPE NCC | GB | 1st Jul 2002 |
| 193.201.161.0/24 | 256 | RIPE NCC | RO | 2nd Jul 2002 |