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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.146.108.0/24 | 256 | RIPE NCC |  SE | 23rd Sept 2003 |
| 194.146.112.0/24 | 256 | RIPE NCC |  UA | 23rd Sept 2003 |
| 194.146.117.0/24 | 256 | RIPE NCC | SE | 3rd Oct 2003 |
| 194.146.118.0/24 | 256 | RIPE NCC |  DE | 2nd Oct 2003 |
| 194.146.125.0/24 | 256 | RIPE NCC |  RO | 23rd Oct 2003 |
| 194.146.128.0/22 | 1k | RIPE NCC |  PL | 7th Oct 2003 |
| 194.146.16.0/22 | 1k | RIPE NCC |  CH | 9th Jun 1995 |
| 194.146.176.0/22 | 1k | RIPE NCC |  GB | 27th Oct 2003 |
| 194.146.20.0/23 | 512 | RIPE NCC | CH | 9th Jun 1995 |
| 194.146.22.0/24 | 256 | RIPE NCC | CH | 9th Jun 1995 |
| 194.146.27.0/24 | 256 | RIPE NCC |  FR | 26th Jun 1995 |
| 194.146.46.0/24 | 256 | RIPE NCC | FR | 13th Jul 1995 |
| 194.146.64.0/23 | 512 | RIPE NCC |  EE | 31st Oct 2019 |
| 194.146.71.0/24 | 256 | RIPE NCC | GB | 2nd Oct 1995 |
| 194.146.72.0/21 | 2k | RIPE NCC | FR | 24th Aug 1995 |
| 194.146.80.0/23 | 512 | RIPE NCC | FR | 24th Aug 1995 |
| 194.146.82.0/23 | 512 | RIPE NCC | EE | 31st Oct 2019 |
| 194.146.99.0/24 | 256 | RIPE NCC |  ES | 22nd Nov 2019 |
| 194.147.108.0/24 | 256 | RIPE NCC | PL | 29th Feb 2012 |
| 194.147.143.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.151.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.170.0/24 | 256 | RIPE NCC |  IR | 22nd Nov 2019 |
| 194.147.18.0/23 | 512 | RIPE NCC |  DK | 1st Sept 1993 |
| 194.147.20.0/23 | 512 | RIPE NCC | DK | 1st Sept 1993 |
| 194.147.208.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.210.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.22.0/23 | 512 | RIPE NCC | ES | 31st Oct 2019 |
| 194.147.223.0/24 | 256 | RIPE NCC |  BG | 18th Nov 2022 |
| 194.147.224.0/24 | 256 | RIPE NCC |  RU | 16th Nov 2022 |
| 194.147.229.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.231.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.232.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 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 |
| 194.147.45.0/24 | 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 |