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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 195.137.182.0/24 | 256 | RIPE NCC |  CZ | 26th Sept 2005 |
| 195.137.184.0/24 | 256 | RIPE NCC |  FR | 26th Sept 2005 |
| 195.137.192.0/23 | 512 | RIPE NCC | FR | 5th Nov 2019 |
| 195.137.204.0/23 | 512 | RIPE NCC |  IE | 5th Nov 2019 |
| 195.137.212.0/23 | 512 | RIPE NCC |  DE | 30th Jul 2003 |
| 195.137.214.0/24 | 256 | RIPE NCC |  HK | 27th Aug 2026 |
| 195.137.215.0/24 | 256 | RIPE NCC | CZ | 27th Aug 2026 |
| 195.137.221.0/24 | 256 | RIPE NCC |  FI | 18th Sept 2023 |
| 195.137.242.0/24 | 256 | RIPE NCC |  NL | 24th Apr 2012 |
| 195.137.248.0/23 | 512 | RIPE NCC | FR | 2nd Sept 2003 |
| 195.137.250.0/23 | 512 | RIPE NCC |  UA | 3rd Sept 2003 |
| 195.137.254.0/23 | 512 | RIPE NCC | UA | 4th Sept 2003 |
| 195.138.192.0/24 | 256 | RIPE NCC |  RO | 8th Sept 2006 |
| 195.138.197.0/24 | 256 | RIPE NCC |  US | 18th Jul 2023 |
| 195.138.198.0/24 | 256 | RIPE NCC | UA | 11th Sept 2006 |
| 195.138.219.0/24 | 256 | RIPE NCC | UA | 18th Sept 2006 |
| 195.138.221.0/24 | 256 | RIPE NCC |  SE | 19th Sept 2006 |
| 195.138.224.0/21 | 2k | RIPE NCC |  MT | 3rd Sept 2012 |
| 195.138.37.0/24 | 256 | RIPE NCC | NL | 21st Jul 1997 |
| 195.138.53.0/24 | 256 | RIPE NCC |  EE | 21st Jul 1997 |
| 195.138.57.0/24 | 256 | RIPE NCC | DE | 21st Jul 1997 |
| 195.138.60.0/24 | 256 | RIPE NCC | DE | 21st Jul 1997 |
| 195.138.63.0/24 | 256 | RIPE NCC | DE | 21st Jul 1997 |
| 195.14.1.0/24 | 256 | RIPE NCC | NL | 22nd Nov 2005 |
| 195.14.10.0/24 | 256 | RIPE NCC | FR | 22nd Nov 2019 |
| 195.14.105.0/24 | 256 | RIPE NCC |  IT | 28th Jul 2021 |
| 195.14.110.0/23 | 512 | RIPE NCC |  KW | 30th Jul 2010 |
| 195.14.12.0/24 | 256 | RIPE NCC |  RU | 28th Nov 2005 |
| 195.14.120.0/23 | 512 | RIPE NCC |  AT | 9th Jul 2010 |
| 195.14.124.0/23 | 512 | RIPE NCC | IE | 12th Jul 2010 |
| 195.14.15.0/24 | 256 | RIPE NCC | FI | 29th Nov 2005 |
| 195.14.21.0/24 | 256 | RIPE NCC | UA | 19th Jun 2020 |
| 195.14.30.0/24 | 256 | RIPE NCC |  PL | 20th Jun 2012 |
| 195.14.99.0/24 | 256 | RIPE NCC |  VG | 30th May 2023 |
| 195.140.164.0/22 | 1k | RIPE NCC |  ME | 4th Sept 2003 |
| 195.140.172.0/22 | 1k | RIPE NCC | SE | 8th Sept 2003 |
| 195.140.188.0/24 | 256 | RIPE NCC | NL | 5th Mar 2008 |
| 195.140.189.0/24 | 256 | RIPE NCC | IT | 5th Mar 2008 |
| 195.140.190.0/24 | 256 | RIPE NCC |  GB | 5th Mar 2008 |
| 195.140.191.0/24 | 256 | RIPE NCC | PL | 5th Mar 2008 |
| 195.140.196.0/22 | 1k | RIPE NCC |  TR | 16th Sept 2003 |
| 195.140.216.0/24 | 256 | RIPE NCC | RU | 22nd Jun 2026 |
| 195.140.219.0/24 | 256 | RIPE NCC |  OM | 22nd Jun 2026 |
| 195.140.228.0/22 | 1k | RIPE NCC | UA | 11th Jun 2010 |
| 195.142.156.0/22 | 1k | APNIC |  IN | 23rd Apr 2014 |
| 195.142.212.0/22 | 1k | APNIC | IN | 3rd Mar 2014 |
| 195.144.12.0/24 | 256 | RIPE NCC | PL | 17th Apr 2012 |
| 195.144.128.0/19 | 8.2k | RIPE NCC | GB | 8th Oct 1996 |
| 195.144.17.0/24 | 256 | RIPE NCC | NL | 15th Nov 2005 |
| 195.144.18.0/23 | 512 | RIPE NCC | NL | 15th Nov 2005 |