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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,296 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.147.233.0/24 | 256 | RIPE NCC |  CH | 1st Sept 1993 |
| 194.147.241.0/24 | 256 | RIPE NCC |  EE | 22nd Nov 2019 |
| 194.147.244.0/24 | 256 | RIPE NCC | EE | 22nd Nov 2019 |
| 194.147.254.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.255.0/24 | 256 | RIPE NCC | EE | 22nd Nov 2019 |
| 194.147.28.0/22 | 1k | RIPE NCC |  RU | 3rd Aug 2018 |
| 194.147.45.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.66.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.149.160.0/19 | 8.2k | RIPE NCC |  FR | 16th Jan 1996 |
| 194.149.236.0/24 | 256 | RIPE NCC |  LT | 19th Jul 2022 |
| 194.149.238.0/23 | 512 | RIPE NCC |  FI | 3rd Aug 2000 |
| 194.149.244.0/24 | 256 | RIPE NCC |  IT | 31st Jul 2000 |
| 194.149.89.0/24 | 256 | RIPE NCC | EE | 22nd Nov 2019 |
| 194.15.104.0/22 | 1k | RIPE NCC |  RO | 19th Sept 2018 |
| 194.15.140.0/24 | 256 | RIPE NCC |  ES | 20th Nov 2019 |
| 194.15.142.0/24 | 256 | RIPE NCC |  DE | 20th Dec 1993 |
| 194.15.143.0/24 | 256 | RIPE NCC | DE | 20th Dec 1993 |
| 194.15.144.0/24 | 256 | RIPE NCC | DE | 21st Dec 1993 |
| 194.15.145.0/24 | 256 | RIPE NCC | FR | 9th Sept 1999 |
| 194.15.146.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |
| 194.15.182.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |
| 194.15.183.0/24 | 256 | RIPE NCC | DE | 3rd Jan 1994 |
| 194.15.195.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |
| 194.15.198.0/23 | 512 | RIPE NCC | DE | 11th Jan 1994 |
| 194.15.200.0/21 | 2k | RIPE NCC | DE | 11th Jan 1994 |
| 194.15.219.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |
| 194.15.232.0/24 | 256 | RIPE NCC | ES | 20th Nov 2019 |
| 194.15.234.0/23 | 512 | RIPE NCC |  GB | 18th Oct 2019 |
| 194.15.238.0/23 | 512 | RIPE NCC | GB | 18th Oct 2019 |
| 194.15.252.0/22 | 1k | RIPE NCC | DE | 26th Jan 1994 |
| 194.150.124.0/22 | 1k | RIPE NCC | RO | 30th May 2018 |
| 194.150.165.0/24 | 256 | RIPE NCC |  IR | 28th Apr 2025 |
| 194.150.180.0/23 | 512 | RIPE NCC | ES | 31st Oct 2019 |
| 194.150.198.0/23 | 512 | RIPE NCC | CH | 17th Aug 2004 |
| 194.150.238.0/23 | 512 | RIPE NCC |  PL | 6th Jul 2004 |
| 194.150.80.0/22 | 1k | RIPE NCC | FR | 27th May 2004 |
| 194.152.146.0/24 | 256 | RIPE NCC |  HU | 6th Feb 1996 |
| 194.152.149.0/24 | 256 | RIPE NCC | HU | 6th Feb 1996 |
| 194.152.40.0/23 | 512 | RIPE NCC | GB | 15th May 2008 |
| 194.152.48.0/23 | 512 | RIPE NCC | IT | 20th May 2008 |
| 194.153.109.0/24 | 256 | RIPE NCC | FR | 5th Dec 1999 |
| 194.153.113.0/24 | 256 | RIPE NCC | DE | 22nd Nov 2006 |
| 194.153.130.0/24 | 256 | RIPE NCC |  NO | 19th Aug 2026 |
| 194.153.134.0/24 | 256 | RIPE NCC | PL | 19th Aug 2004 |
| 194.153.144.0/24 | 256 | RIPE NCC | GB | 24th Feb 2000 |
| 194.153.147.0/24 | 256 | RIPE NCC | DE | 4th Apr 2000 |
| 194.153.152.0/25 | 128 | RIPE NCC | DE | 7th Jan 2003 |
| 194.153.153.128/25 | 128 | RIPE NCC |  AE | 24th Jan 2011 |
| 194.153.153.64/26 | 64 | RIPE NCC | CH | 19th Sept 2025 |
| 194.153.154.0/25 | 128 | RIPE NCC | GB | 7th Jul 2010 |