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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.253.3.0/24 | 256 | RIPE NCC |  RU | 10th Sept 2021 |
| 185.3.16.0/22 | 1k | RIPE NCC | RU | 19th Sept 2012 |
| 185.35.0.0/22 | 1k | RIPE NCC | RU | 11th Sept 2013 |
| 185.35.44.0/22 | 1k | RIPE NCC | RU | 13th Sept 2013 |
| 185.36.100.0/24 | 256 | RIPE NCC | RU | 10th Jan 2024 |
| 185.36.23.0/24 | 256 | RIPE NCC | RU | 16th Jun 2026 |
| 185.39.132.0/22 | 1k | RIPE NCC | RU | 31st Oct 2013 |
| 185.4.56.0/22 | 1k | RIPE NCC | RU | 25th Sept 2012 |
| 185.43.100.0/22 | 1k | RIPE NCC | RU | 19th Dec 2013 |
| 185.44.0.0/22 | 1k | RIPE NCC | RU | 27th Dec 2013 |
| 185.46.152.0/24 | 256 | RIPE NCC | RU | 31st Jan 2014 |
| 185.46.153.0/24 | 256 | RIPE NCC | RU | 31st Jan 2014 |
| 185.46.154.0/24 | 256 | RIPE NCC | RU | 31st Jan 2014 |
| 185.50.156.0/22 | 1k | RIPE NCC | RU | 17th Mar 2014 |
| 185.50.7.0/24 | 256 | RIPE NCC | RU | 10th Mar 2014 |
| 185.59.218.0/24 | 256 | RIPE NCC | RU | 4th Jun 2014 |
| 185.61.172.0/22 | 1k | RIPE NCC | RU | 23rd Jun 2014 |
| 185.75.188.0/24 | 256 | RIPE NCC | RU | 3rd Nov 2014 |
| 185.75.190.0/24 | 256 | RIPE NCC | RU | 3rd Nov 2014 |
| 185.75.191.0/24 | 256 | RIPE NCC | RU | 3rd Nov 2014 |
| 185.77.16.0/22 | 1k | RIPE NCC | RU | 14th Nov 2014 |
| 185.77.231.0/24 | 256 | RIPE NCC | RU | 20th Nov 2014 |
| 185.78.108.0/22 | 1k | RIPE NCC | RU | 24th Nov 2014 |
| 185.94.224.0/22 | 1k | RIPE NCC | RU | 7th Apr 2015 |
| 185.94.31.0/24 | 256 | RIPE NCC | RU | 3rd Oct 2023 |
| 185.98.86.0/24 | 256 | RIPE NCC | RU | 29th Apr 2015 |
| 185.98.87.0/24 | 256 | RIPE NCC | RU | 29th Apr 2015 |
| 188.122.160.0/19 | 8.2k | RIPE NCC | RU | 4th Jun 2009 |
| 188.227.104.0/23 | 512 | RIPE NCC | RU | 22nd Jul 2009 |
| 188.64.148.0/24 | 256 | RIPE NCC | RU | 21st Jul 2009 |
| 188.64.216.0/21 | 2k | RIPE NCC | RU | 27th Jul 2009 |
| 188.65.208.0/21 | 2k | RIPE NCC | RU | 18th Aug 2009 |
| 188.68.190.0/24 | 256 | RIPE NCC | RU | 25th Aug 2009 |
| 188.72.104.0/23 | 512 | RIPE NCC | RU | 9th Jul 2009 |
| 192.101.4.0/24 | 256 | RIPE NCC | RU | 11th Mar 1991 |
| 192.124.174.0/24 | 256 | RIPE NCC | RU | 23rd Sept 1991 |
| 192.124.208.0/24 | 256 | RIPE NCC | RU | 23rd Sept 1991 |
| 192.124.210.0/23 | 512 | RIPE NCC | RU | 23rd Sept 1991 |
| 192.124.212.0/22 | 1k | RIPE NCC | RU | 23rd Sept 1991 |
| 192.124.217.0/24 | 256 | RIPE NCC | RU | 23rd Sept 1991 |
| 192.124.218.0/23 | 512 | RIPE NCC | RU | 23rd Sept 1991 |
| 192.136.61.0/24 | 256 | RIPE NCC | RU | 6th Jan 1992 |
| 192.144.28.0/24 | 256 | RIPE NCC | RU | 23rd Nov 2018 |
| 192.148.166.0/24 | 256 | RIPE NCC | RU | 27th Feb 1992 |
| 192.150.205.0/24 | 256 | RIPE NCC | RU | 19th Mar 1992 |
| 192.160.10.0/24 | 256 | RIPE NCC | RU | 8th Nov 2023 |
| 192.188.116.0/24 | 256 | RIPE NCC | RU | 30th Jun 1992 |
| 192.188.187.0/24 | 256 | RIPE NCC | RU | 21st Jul 1992 |
| 192.195.8.0/24 | 256 | RIPE NCC | RU | 22nd Mar 1994 |
| 192.86.11.0/24 | 256 | RIPE NCC | RU | 16th Nov 1990 |