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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,075 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.1.175.0/24 | 256 | RIPE NCC |  DE | 23rd Jun 2020 |
| 185.1.176.0/24 | 256 | RIPE NCC | DE | 22nd May 2023 |
| 185.1.177.0/24 | 256 | RIPE NCC |  FR | 1st Jul 2020 |
| 185.1.178.0/24 | 256 | RIPE NCC |  IM | 2nd Jul 2020 |
| 185.1.18.0/24 | 256 | RIPE NCC | DE | 12th Sept 2013 |
| 185.1.180.0/24 | 256 | RIPE NCC |  US | 6th Jul 2020 |
| 185.1.181.0/24 | 256 | RIPE NCC |  SE | 22nd Jul 2020 |
| 185.1.182.0/24 | 256 | RIPE NCC | DE | 23rd Jul 2020 |
| 185.1.183.0/24 | 256 | RIPE NCC | DE | 23rd Jul 2020 |
| 185.1.184.0/23 | 512 | RIPE NCC |  NL | 23rd Jan 2026 |
| 185.1.186.0/24 | 256 | RIPE NCC |  IT | 24th Aug 2020 |
| 185.1.187.0/24 | 256 | RIPE NCC | DE | 25th Aug 2020 |
| 185.1.188.0/24 | 256 | RIPE NCC |  SA | 23rd Aug 2021 |
| 185.1.189.0/24 | 256 | RIPE NCC | DE | 11th Sept 2020 |
| 185.1.19.0/24 | 256 | RIPE NCC |  RU | 11th Oct 2013 |
| 185.1.190.0/24 | 256 | RIPE NCC | NL | 18th Sept 2020 |
| 185.1.191.0/24 | 256 | RIPE NCC |  OM | 23rd Sept 2020 |
| 185.1.192.0/23 | 512 | RIPE NCC | DE | 30th Sept 2020 |
| 185.1.194.0/24 | 256 | RIPE NCC |  UA | 5th Nov 2020 |
| 185.1.195.0/24 | 256 | RIPE NCC |  GB | 27th Nov 2020 |
| 185.1.196.0/24 | 256 | RIPE NCC | UA | 5th Nov 2020 |
| 185.1.197.0/24 | 256 | RIPE NCC | DE | 6th Jan 2021 |
| 185.1.198.0/24 | 256 | RIPE NCC | UA | 22nd Jan 2021 |
| 185.1.199.0/24 | 256 | RIPE NCC |  PL | 15th Feb 2021 |
| 185.1.2.0/24 | 256 | RIPE NCC | FR | 20th Dec 2013 |
| 185.1.20.0/24 | 256 | RIPE NCC |  ES | 16th Oct 2013 |
| 185.1.200.0/24 | 256 | RIPE NCC |  IS | 22nd Feb 2021 |
| 185.1.201.0/24 | 256 | RIPE NCC | DE | 10th Mar 2021 |
| 185.1.202.0/23 | 512 | RIPE NCC |  LV | 2nd Jun 2026 |
| 185.1.204.0/24 | 256 | RIPE NCC | DE | 22nd May 2023 |
| 185.1.205.0/24 | 256 | RIPE NCC |  CH | 28th May 2021 |
| 185.1.206.0/24 | 256 | RIPE NCC | IT | 31st May 2021 |
| 185.1.207.0/24 | 256 | RIPE NCC | GB | 7th Jun 2021 |
| 185.1.208.0/23 | 512 | RIPE NCC | DE | 18th Jun 2021 |
| 185.1.210.0/23 | 512 | RIPE NCC | DE | 18th Jun 2021 |
| 185.1.212.0/24 | 256 | RIPE NCC |  NO | 18th Jun 2021 |
| 185.1.213.0/24 | 256 | RIPE NCC | UA | 1st Jul 2021 |
| 185.1.215.0/24 | 256 | RIPE NCC | SE | 24th Aug 2021 |
| 185.1.216.0/24 | 256 | RIPE NCC | CH | 20th Sept 2021 |
| 185.1.217.0/24 | 256 | RIPE NCC | PL | 23rd Sept 2021 |
| 185.1.218.0/24 | 256 | RIPE NCC | IT | 18th Oct 2021 |
| 185.1.22.0/24 | 256 | RIPE NCC | ES | 5th Apr 2018 |
| 185.1.220.0/24 | 256 | RIPE NCC | DE | 20th Oct 2021 |
| 185.1.221.0/24 | 256 | RIPE NCC |  TR | 22nd Oct 2021 |
| 185.1.222.0/23 | 512 | RIPE NCC | NL | 26th Oct 2021 |
| 185.1.224.0/24 | 256 | RIPE NCC |  GE | 28th Oct 2021 |
| 185.1.225.0/24 | 256 | RIPE NCC | UA | 11th Nov 2021 |
| 185.1.228.0/24 | 256 | RIPE NCC | NO | 1st Dec 2021 |
| 185.1.23.0/24 | 256 | RIPE NCC | RU | 27th Mar 2014 |
| 185.1.230.0/24 | 256 | RIPE NCC | SE | 21st Dec 2021 |