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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.42.47.0/26 | 64 | RIPE NCC |  BG | 28th Feb 2025 |
| 194.42.47.128/25 | 128 | RIPE NCC |  DE | 28th Mar 2001 |
| 194.42.47.64/26 | 64 | RIPE NCC |  QA | 3rd Mar 2025 |
| 194.42.48.0/24 | 256 | RIPE NCC |  CH | 12th Oct 1999 |
| 194.42.49.0/24 | 256 | RIPE NCC |  NL | 18th May 2004 |
| 194.42.55.0/27 | 32 | RIPE NCC | DE | 28th Mar 2001 |
| 194.42.55.128/27 | 32 | RIPE NCC |  CY | 14th Sept 2012 |
| 194.42.55.160/27 | 32 | RIPE NCC |  SE | 28th Apr 2006 |
| 194.42.55.192/27 | 32 | RIPE NCC | DE | 8th May 2006 |
| 194.42.55.224/27 | 32 | RIPE NCC |  DK | 9th Feb 2007 |
| 194.42.55.32/27 | 32 | RIPE NCC | CY | 14th Sept 2012 |
| 194.42.55.64/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 194.43.0.0/16 | 65.5k | RIPE NCC |  NO | 9th Apr 1996 |
| 194.45.127.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.152.0/23 | 512 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.165.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.167.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.168.0/24 | 256 | RIPE NCC | NL | 28th Feb 1994 |
| 194.45.182.0/23 | 512 | RIPE NCC |  US | 28th Feb 1994 |
| 194.45.200.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.217.0/24 | 256 | RIPE NCC |  IE | 21st Nov 2019 |
| 194.45.232.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.45.56.0/24 | 256 | RIPE NCC | DE | 28th Feb 1994 |
| 194.46.39.0/24 | 256 | RIPE NCC |  GB | 28th Feb 1994 |
| 194.46.40.0/23 | 512 | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.43.0/24 | 256 | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.48.0/21 | 2k | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.56.0/24 | 256 | RIPE NCC | GB | 28th Feb 1994 |
| 194.46.61.0/24 | 256 | RIPE NCC | GB | 28th Feb 1994 |
| 194.48.0.0/24 | 256 | RIPE NCC |  FR | 21st Sept 2021 |
| 194.48.1.0/24 | 256 | RIPE NCC |  PL | 7th Aug 2023 |
| 194.48.100.0/22 | 1k | RIPE NCC | CH | 26th Jul 2018 |
| 194.48.104.0/22 | 1k | RIPE NCC | CH | 17th May 2018 |
| 194.48.16.0/20 | 4.1k | RIPE NCC |  AT | 6th Jul 1999 |
| 194.48.194.0/23 | 512 | RIPE NCC | DE | 21st Sept 1994 |
| 194.48.196.0/24 | 256 | RIPE NCC |  AE | 19th Jun 2026 |
| 194.48.201.0/24 | 256 | RIPE NCC | CH | 3rd May 2023 |
| 194.48.202.0/24 | 256 | RIPE NCC | BG | 3rd May 2023 |
| 194.48.204.0/24 | 256 | RIPE NCC | DE | 13th Oct 2021 |
| 194.48.208.0/24 | 256 | RIPE NCC |  CZ | 15th Jan 2008 |
| 194.48.219.0/24 | 256 | RIPE NCC | PL | 24th Jan 2008 |
| 194.48.224.0/22 | 1k | RIPE NCC | DE | 26th Jul 2018 |
| 194.48.240.0/24 | 256 | RIPE NCC | AT | 26th Jul 1994 |
| 194.48.243.0/24 | 256 | RIPE NCC | FR | 18th Jun 2026 |
| 194.48.254.0/24 | 256 | RIPE NCC |  IT | 18th Jun 2026 |
| 194.48.255.0/24 | 256 | RIPE NCC |  RO | 7th Mar 2023 |
| 194.48.3.0/24 | 256 | RIPE NCC | IE | 21st Nov 2019 |
| 194.48.8.0/21 | 2k | RIPE NCC | AT | 6th Jul 1999 |
| 194.49.108.0/23 | 512 | RIPE NCC | AT | 23rd Oct 2019 |
| 194.49.112.0/23 | 512 | RIPE NCC | AT | 23rd Oct 2019 |