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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,108 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.228.156.0/22 | 1k | RIPE NCC |  FR | 27th Oct 2017 |
| 185.228.204.0/24 | 256 | RIPE NCC |  HU | 5th Feb 2024 |
| 185.228.216.0/22 | 1k | RIPE NCC |  RO | 30th Oct 2017 |
| 185.228.249.0/24 | 256 | RIPE NCC |  ES | 27th Jan 2026 |
| 185.228.252.0/22 | 1k | RIPE NCC |  GB | 30th Oct 2017 |
| 185.228.56.0/24 | 256 | RIPE NCC |  UA | 8th Feb 2023 |
| 185.228.84.0/22 | 1k | RIPE NCC | FR | 26th Oct 2017 |
| 185.229.135.0/24 | 256 | RIPE NCC |  IR | 7th Mar 2023 |
| 185.229.164.0/22 | 1k | RIPE NCC |  SA | 1st Nov 2017 |
| 185.229.168.0/22 | 1k | RIPE NCC |  DE | 1st Nov 2017 |
| 185.229.205.0/24 | 256 | RIPE NCC |  RU | 18th Dec 2020 |
| 185.23.100.0/22 | 1k | RIPE NCC | GB | 9th Apr 2013 |
| 185.23.176.0/22 | 1k | RIPE NCC | GB | 11th Apr 2013 |
| 185.23.240.0/22 | 1k | RIPE NCC | GB | 16th Apr 2013 |
| 185.23.4.0/24 | 256 | RIPE NCC | GB | 14th Jul 2022 |
| 185.23.44.0/23 | 512 | RIPE NCC |  PL | 19th Feb 2018 |
| 185.23.46.0/23 | 512 | RIPE NCC | PL | 19th Feb 2018 |
| 185.23.56.0/22 | 1k | RIPE NCC | GB | 8th Apr 2013 |
| 185.23.77.0/24 | 256 | RIPE NCC | DE | 21st Jul 2020 |
| 185.23.79.0/24 | 256 | RIPE NCC | FR | 22nd Jul 2020 |
| 185.230.107.0/24 | 256 | RIPE NCC | ES | 23rd Dec 2020 |
| 185.230.252.0/22 | 1k | RIPE NCC |  MK | 9th Nov 2017 |
| 185.230.72.0/22 | 1k | RIPE NCC |  NO | 7th Nov 2017 |
| 185.231.172.0/22 | 1k | RIPE NCC |  AU | 13th Nov 2017 |
| 185.231.8.0/22 | 1k | RIPE NCC | FR | 9th Nov 2017 |
| 185.232.108.0/22 | 1k | RIPE NCC | UA | 17th Nov 2017 |
| 185.232.165.0/24 | 256 | RIPE NCC |  LU | 8th Jul 2021 |
| 185.232.228.0/22 | 1k | RIPE NCC | RU | 21st Nov 2017 |
| 185.232.235.0/24 | 256 | RIPE NCC | RU | 15th Jan 2021 |
| 185.232.244.0/22 | 1k | RIPE NCC | GB | 21st Nov 2017 |
| 185.232.43.0/24 | 256 | RIPE NCC |  NL | 7th Sept 2021 |
| 185.232.46.0/24 | 256 | RIPE NCC | GB | 8th Sept 2021 |
| 185.232.60.0/22 | 1k | RIPE NCC | RU | 16th Nov 2017 |
| 185.232.72.0/22 | 1k | RIPE NCC | NL | 16th Nov 2017 |
| 185.232.89.0/24 | 256 | RIPE NCC |  AT | 4th Jan 2021 |
| 185.232.91.0/24 | 256 | RIPE NCC |  RS | 6th Jan 2021 |
| 185.233.140.0/22 | 1k | RIPE NCC | HU | 24th Nov 2017 |
| 185.233.218.0/24 | 256 | RIPE NCC |  BE | 27th Dec 2019 |
| 185.233.240.0/22 | 1k | RIPE NCC | DE | 24th Nov 2017 |
| 185.233.252.0/22 | 1k | RIPE NCC |  DK | 27th Nov 2017 |
| 185.233.28.0/22 | 1k | RIPE NCC | NL | 21st Nov 2017 |
| 185.233.56.0/22 | 1k | RIPE NCC | DK | 22nd Nov 2017 |
| 185.233.60.0/22 | 1k | RIPE NCC | NL | 22nd Nov 2017 |
| 185.233.64.0/24 | 256 | RIPE NCC | UA | 15th Jan 2021 |
| 185.234.103.0/24 | 256 | RIPE NCC | DE | 4th Mar 2026 |
| 185.234.16.0/22 | 1k | RIPE NCC |  CH | 27th Nov 2017 |
| 185.234.160.0/22 | 1k | RIPE NCC |  SI | 29th Nov 2017 |
| 185.234.216.0/24 | 256 | RIPE NCC | RU | 22nd Nov 2021 |
| 185.234.218.0/24 | 256 | RIPE NCC |  TR | 23rd Nov 2021 |
| 185.234.246.0/24 | 256 | RIPE NCC | ES | 21st Jan 2021 |