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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.180.205.0/24 | 256 | RIPE NCC |  DE | 29th Sept 1995 |
| 194.180.22.0/23 | 512 | RIPE NCC | DE | 7th Jul 1995 |
| 194.180.220.0/22 | 1k | RIPE NCC |  PL | 31st May 2018 |
| 194.180.226.0/26 | 64 | RIPE NCC | PL | 19th Dec 2025 |
| 194.180.226.152/29 | 8 | RIPE NCC |  EE | 10th Dec 2008 |
| 194.180.226.192/26 | 64 | RIPE NCC |  RU | 17th Dec 2025 |
| 194.180.226.64/26 | 64 | RIPE NCC | PL | 19th Dec 2025 |
| 194.180.227.0/24 | 256 | RIPE NCC |  NL | 22nd Nov 2019 |
| 194.180.24.0/24 | 256 | RIPE NCC | DE | 7th Jul 1995 |
| 194.180.240.0/24 | 256 | RIPE NCC |  CH | 30th Apr 2025 |
| 194.180.241.0/24 | 256 | RIPE NCC |  CZ | 30th Apr 2025 |
| 194.180.245.0/24 | 256 | RIPE NCC |  KG | 30th Apr 2025 |
| 194.180.246.0/24 | 256 | RIPE NCC |  FI | 30th Apr 2025 |
| 194.180.247.0/24 | 256 | RIPE NCC | CH | 30th Apr 2025 |
| 194.180.248.0/24 | 256 | RIPE NCC |  GB | 24th Feb 2025 |
| 194.180.60.0/22 | 1k | RIPE NCC |  IE | 31st May 2018 |
| 194.180.64.0/20 | 4.1k | RIPE NCC | DE | 13th Jul 1995 |
| 194.180.8.0/24 | 256 | RIPE NCC | CZ | 15th Jan 2025 |
| 194.182.224.0/21 | 2k | RIPE NCC |  NO | 14th Feb 1996 |
| 194.187.116.0/24 | 256 | RIPE NCC | PL | 21st Jul 2021 |
| 194.187.117.0/24 | 256 | RIPE NCC |  IT | 22nd Jul 2021 |
| 194.187.118.0/24 | 256 | RIPE NCC | GB | 22nd Jul 2021 |
| 194.187.180.0/22 | 1k | RIPE NCC | PL | 9th Sept 2005 |
| 194.187.196.0/22 | 1k | RIPE NCC | RU | 12th Aug 2008 |
| 194.187.228.0/22 | 1k | RIPE NCC |  UA | 21st Sept 2005 |
| 194.187.52.0/23 | 512 | RIPE NCC | PL | 20th Jul 2005 |
| 194.190.119.0/24 | 256 | RIPE NCC | RU | 7th Aug 1995 |
| 194.190.149.0/24 | 256 | RIPE NCC | RU | 7th Aug 1995 |
| 194.190.154.0/24 | 256 | RIPE NCC | RU | 7th Aug 1995 |
| 194.190.155.0/24 | 256 | RIPE NCC | RU | 7th Aug 1995 |
| 194.190.170.0/23 | 512 | RIPE NCC | RU | 7th Aug 1995 |
| 194.195.104.0/21 | 2k | RIPE NCC | DE | 14th Sept 1995 |
| 194.195.200.0/21 | 2k | RIPE NCC | DE | 14th Sept 1995 |
| 194.195.96.0/22 | 1k | RIPE NCC | DE | 14th Sept 1995 |
| 194.2.154.0/24 | 256 | RIPE NCC |  FR | 27th Sept 1993 |
| 194.213.109.0/24 | 256 | RIPE NCC |  SK | 18th Oct 2022 |
| 194.213.128.0/19 | 8.2k | RIPE NCC | NO | 8th Jan 1996 |
| 194.213.160.0/19 | 8.2k | RIPE NCC | NO | 22nd Apr 1999 |
| 194.213.26.0/24 | 256 | RIPE NCC | PL | 2nd Aug 2010 |
| 194.213.27.0/24 | 256 | RIPE NCC | DE | 12th Sept 2005 |
| 194.213.28.0/24 | 256 | RIPE NCC | GB | 12th Sept 2005 |
| 194.213.29.0/24 | 256 | RIPE NCC | IE | 12th Sept 2005 |
| 194.213.7.0/24 | 256 | RIPE NCC | CH | 6th Sept 2005 |
| 194.222.0.0/19 | 8.2k | RIPE NCC | GB | 21st Dec 1995 |
| 194.222.128.0/17 | 32.8k | RIPE NCC | GB | 26th Jun 1996 |
| 194.222.32.0/19 | 8.2k | RIPE NCC | GB | 27th Mar 1996 |
| 194.222.64.0/18 | 16.4k | RIPE NCC | GB | 26th Jun 1996 |
| 194.226.100.0/22 | 1k | RIPE NCC | RU | 3rd Jan 1996 |
| 194.226.124.0/23 | 512 | RIPE NCC | RU | 3rd Jan 1996 |
| 194.226.134.0/23 | 512 | RIPE NCC | RU | 3rd Jan 1996 |