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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Russia
2,050 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.94.221.0/24 | 256 | RIPE NCC | 5th Mar 1991 | |
| 193.0.166.0/23 | 512 | RIPE NCC | 9th Aug 2012 | |
| 193.104.127.0/24 | 256 | RIPE NCC | 11th Nov 2009 | |
| 193.105.118.0/24 | 256 | RIPE NCC | 12th Feb 2010 | |
| 193.105.194.0/24 | 256 | RIPE NCC | 9th Jun 2026 | |
| 193.105.213.0/24 | 256 | RIPE NCC | 17th Mar 2010 | |
| 193.105.72.0/24 | 256 | RIPE NCC | 27th Jan 2010 | |
| 193.106.112.0/22 | 1k | RIPE NCC | 24th Dec 2009 | |
| 193.106.191.0/24 | 256 | RIPE NCC | 4th Dec 2023 | |
| 193.107.188.0/22 | 1k | RIPE NCC | 5th Mar 2010 | |
| 193.109.160.0/22 | 1k | RIPE NCC | 3rd Oct 2001 | |
| 193.110.0.0/22 | 1k | RIPE NCC | 4th May 2018 | |
| 193.124.116.0/24 | 256 | RIPE NCC | 1st Sept 1993 | |
| 193.124.134.0/24 | 256 | RIPE NCC | 1st Sept 1993 | |
| 193.124.48.0/24 | 256 | RIPE NCC | 1st Sept 1993 | |
| 193.124.54.0/24 | 256 | RIPE NCC | 1st Sept 1993 | |
| 193.148.15.0/24 | 256 | RIPE NCC | 29th Mar 2005 | |
| 193.150.118.0/23 | 512 | RIPE NCC | 21st Oct 2011 | |
| 193.151.168.0/22 | 1k | RIPE NCC | 24th Oct 2018 | |
| 193.151.227.0/24 | 256 | RIPE NCC | 9th Aug 2012 | |
| 193.160.12.0/23 | 512 | RIPE NCC | 6th Jul 2010 | |
| 193.160.158.0/24 | 256 | RIPE NCC | 10th Oct 2011 | |
| 193.162.130.0/24 | 256 | RIPE NCC | 16th Sept 2021 | |
| 193.162.139.0/24 | 256 | RIPE NCC | 2nd Dec 2020 | |
| 193.163.197.0/24 | 256 | RIPE NCC | 28th Sept 2021 | |
| 193.163.94.0/24 | 256 | RIPE NCC | 16th Sept 2021 | |
| 193.164.194.0/23 | 512 | RIPE NCC | 20th Aug 2009 | |
| 193.168.217.0/24 | 256 | RIPE NCC | 6th May 2021 | |
| 193.17.52.0/24 | 256 | RIPE NCC | 15th Dec 2003 | |
| 193.176.153.0/24 | 256 | RIPE NCC | 18th Nov 2019 | |
| 193.176.158.0/24 | 256 | RIPE NCC | 18th Nov 2019 | |
| 193.176.179.0/24 | 256 | RIPE NCC | 18th Nov 2019 | |
| 193.176.190.0/24 | 256 | RIPE NCC | 18th Nov 2019 | |
| 193.178.210.0/24 | 256 | RIPE NCC | 14th Dec 2021 | |
| 193.186.14.0/24 | 256 | RIPE NCC | 12th Nov 2025 | |
| 193.189.138.0/24 | 256 | RIPE NCC | 3rd Sept 2012 | |
| 193.19.68.0/23 | 512 | RIPE NCC | 21st Nov 2003 | |
| 193.192.128.0/19 | 8.2k | RIPE NCC | 14th May 1996 | |
| 193.194.105.0/24 | 256 | RIPE NCC | 5th Sept 2011 | |
| 193.200.12.0/23 | 512 | RIPE NCC | 15th Oct 2019 | |
| 193.201.152.0/25 | 128 | RIPE NCC | 28th Mar 2003 | |
| 193.201.156.0/25 | 128 | RIPE NCC | 3rd Jun 2004 | |
| 193.201.8.0/24 | 256 | RIPE NCC | 16th Sept 2021 | |
| 193.22.244.0/24 | 256 | RIPE NCC | 13th Nov 2019 | |
| 193.228.159.0/24 | 256 | RIPE NCC | 20th Jul 2007 | |
| 193.23.3.0/24 | 256 | RIPE NCC | 13th Nov 2019 | |
| 193.232.135.0/24 | 256 | RIPE NCC | 9th Jun 1993 | |
| 193.232.136.0/24 | 256 | RIPE NCC | 9th Jun 1993 | |
| 193.232.181.0/24 | 256 | RIPE NCC | 9th Jun 1993 | |
| 193.232.190.0/23 | 512 | RIPE NCC | 9th Jun 1993 |