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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
25,269 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.169.212.0/22 | 1k | RIPE NCC |  DE | 27th Sept 2016 |
| 185.169.216.0/22 | 1k | RIPE NCC |  RU | 27th Sept 2016 |
| 185.169.40.0/22 | 1k | RIPE NCC |  SE | 21st Sept 2016 |
| 185.169.48.0/22 | 1k | RIPE NCC |  SA | 22nd Sept 2016 |
| 185.17.220.0/22 | 1k | RIPE NCC |  VA | 1st Feb 2013 |
| 185.17.248.0/22 | 1k | RIPE NCC |  FR | 4th Feb 2013 |
| 185.170.100.0/22 | 1k | RIPE NCC |  GB | 29th Sept 2016 |
| 185.170.12.0/22 | 1k | RIPE NCC | FR | 27th Sept 2016 |
| 185.170.147.0/24 | 256 | RIPE NCC |  ES | 13th Jan 2020 |
| 185.170.148.0/22 | 1k | RIPE NCC | FR | 30th Sept 2016 |
| 185.170.152.0/24 | 256 | RIPE NCC | GB | 30th Sept 2016 |
| 185.170.160.0/22 | 1k | RIPE NCC | DE | 30th Sept 2016 |
| 185.170.168.0/22 | 1k | RIPE NCC | DE | 30th Sept 2016 |
| 185.170.240.0/22 | 1k | RIPE NCC |  CZ | 3rd Oct 2016 |
| 185.170.68.0/22 | 1k | RIPE NCC |  NL | 28th Sept 2016 |
| 185.171.0.0/22 | 1k | RIPE NCC |  AT | 4th Oct 2016 |
| 185.171.152.0/22 | 1k | RIPE NCC | SA | 6th Oct 2016 |
| 185.171.163.0/24 | 256 | RIPE NCC | NL | 4th Jul 2023 |
| 185.171.188.0/22 | 1k | RIPE NCC | GB | 6th Oct 2016 |
| 185.171.201.0/24 | 256 | RIPE NCC | GB | 6th Aug 2020 |
| 185.171.236.0/22 | 1k | RIPE NCC | NL | 7th Oct 2016 |
| 185.171.40.0/22 | 1k | RIPE NCC | NL | 4th Oct 2016 |
| 185.171.89.0/24 | 256 | RIPE NCC | NL | 5th Oct 2016 |
| 185.171.90.0/24 | 256 | RIPE NCC | NL | 5th Oct 2016 |
| 185.172.144.0/22 | 1k | RIPE NCC | AT | 12th Oct 2016 |
| 185.172.192.0/22 | 1k | RIPE NCC | DE | 13th Oct 2016 |
| 185.172.232.0/22 | 1k | RIPE NCC | FR | 13th Oct 2016 |
| 185.172.244.0/22 | 1k | RIPE NCC | GB | 13th Oct 2016 |
| 185.172.248.0/22 | 1k | RIPE NCC |  PL | 13th Oct 2016 |
| 185.172.40.0/22 | 1k | RIPE NCC | DE | 10th Oct 2016 |
| 185.173.131.0/24 | 256 | RIPE NCC |  IT | 25th Jun 2021 |
| 185.173.140.0/22 | 1k | RIPE NCC | AT | 18th Oct 2016 |
| 185.173.208.0/22 | 1k | RIPE NCC |  FI | 19th Oct 2016 |
| 185.173.252.0/22 | 1k | RIPE NCC | FR | 20th Oct 2016 |
| 185.173.44.0/22 | 1k | RIPE NCC | ES | 8th Apr 2019 |
| 185.174.200.0/22 | 1k | RIPE NCC |  IR | 25th Oct 2016 |
| 185.174.92.0/22 | 1k | RIPE NCC | CZ | 24th Oct 2016 |
| 185.175.132.0/22 | 1k | RIPE NCC | SE | 28th Oct 2016 |
| 185.175.172.0/22 | 1k | RIPE NCC | RU | 31st Oct 2016 |
| 185.175.188.0/22 | 1k | RIPE NCC |  SK | 23rd Feb 2018 |
| 185.175.236.0/22 | 1k | RIPE NCC |  UA | 1st Nov 2016 |
| 185.175.64.0/24 | 256 | RIPE NCC | DE | 10th Dec 2025 |
| 185.175.66.0/24 | 256 | RIPE NCC | GB | 11th Dec 2025 |
| 185.175.67.0/24 | 256 | RIPE NCC |  TR | 11th Dec 2025 |
| 185.175.68.0/22 | 1k | RIPE NCC |  US | 27th Oct 2016 |
| 185.175.96.0/22 | 1k | RIPE NCC |  NO | 28th Oct 2016 |
| 185.176.133.0/24 | 256 | RIPE NCC | FR | 12th Jan 2024 |
| 185.176.135.0/24 | 256 | RIPE NCC | DE | 12th Jan 2024 |
| 185.176.192.0/22 | 1k | RIPE NCC | DE | 5th Aug 2019 |
| 185.176.60.0/22 | 1k | RIPE NCC |  LV | 3rd Nov 2016 |