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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in United Kingdom
2,614 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.207.180.0/22 | 1k | RIPE NCC |  GB | 9th Jun 2017 |
| 185.207.200.0/22 | 1k | RIPE NCC | GB | 9th Jun 2017 |
| 185.207.23.0/24 | 256 | RIPE NCC | GB | 11th Jan 2024 |
| 185.209.83.0/24 | 256 | RIPE NCC | GB | 5th Nov 2020 |
| 185.21.133.0/24 | 256 | RIPE NCC | GB | 20th Jul 2020 |
| 185.210.104.0/22 | 1k | RIPE NCC | GB | 27th Jun 2017 |
| 185.210.161.0/24 | 256 | RIPE NCC | GB | 6th Nov 2020 |
| 185.216.108.0/22 | 1k | RIPE NCC | GB | 4th Aug 2017 |
| 185.216.137.0/24 | 256 | RIPE NCC | GB | 7th Aug 2017 |
| 185.216.48.0/24 | 256 | RIPE NCC | GB | 16th Nov 2020 |
| 185.217.104.0/22 | 1k | RIPE NCC | GB | 14th Aug 2017 |
| 185.217.132.0/22 | 1k | RIPE NCC | GB | 14th Aug 2017 |
| 185.22.164.0/22 | 1k | RIPE NCC | GB | 2nd Apr 2013 |
| 185.221.4.0/22 | 1k | RIPE NCC | GB | 14th Sept 2017 |
| 185.221.60.0/24 | 256 | RIPE NCC | GB | 8th Mar 2023 |
| 185.221.92.0/22 | 1k | RIPE NCC | GB | 18th Sept 2017 |
| 185.222.107.0/24 | 256 | RIPE NCC | GB | 20th Jan 2025 |
| 185.223.162.0/24 | 256 | RIPE NCC | GB | 7th Dec 2020 |
| 185.224.208.0/22 | 1k | RIPE NCC | GB | 10th Oct 2017 |
| 185.224.232.0/22 | 1k | RIPE NCC | GB | 11th Oct 2017 |
| 185.224.68.0/22 | 1k | RIPE NCC | GB | 6th Oct 2017 |
| 185.225.124.0/24 | 256 | RIPE NCC | GB | 15th Dec 2020 |
| 185.226.208.0/22 | 1k | RIPE NCC | GB | 19th Oct 2017 |
| 185.227.196.0/22 | 1k | RIPE NCC | GB | 24th Oct 2017 |
| 185.228.252.0/22 | 1k | RIPE NCC | GB | 30th Oct 2017 |
| 185.23.100.0/22 | 1k | RIPE NCC | GB | 9th Apr 2013 |
| 185.23.176.0/22 | 1k | RIPE NCC | GB | 11th Apr 2013 |
| 185.23.4.0/24 | 256 | RIPE NCC | GB | 14th Jul 2022 |
| 185.23.56.0/22 | 1k | RIPE NCC | GB | 8th Apr 2013 |
| 185.232.244.0/22 | 1k | RIPE NCC | GB | 21st Nov 2017 |
| 185.232.46.0/24 | 256 | RIPE NCC | GB | 8th Sept 2021 |
| 185.236.124.0/22 | 1k | RIPE NCC | GB | 12th Dec 2017 |
| 185.237.196.0/22 | 1k | RIPE NCC | GB | 20th Dec 2017 |
| 185.238.117.0/24 | 256 | RIPE NCC | GB | 22nd Dec 2017 |
| 185.24.85.0/24 | 256 | RIPE NCC | GB | 18th Apr 2013 |
| 185.241.205.0/24 | 256 | RIPE NCC | GB | 15th Jan 2025 |
| 185.243.80.0/22 | 1k | RIPE NCC | GB | 26th Jan 2018 |
| 185.245.212.0/22 | 1k | RIPE NCC | GB | 12th Feb 2018 |
| 185.245.232.0/22 | 1k | RIPE NCC | GB | 12th Feb 2018 |
| 185.251.244.0/22 | 1k | RIPE NCC | GB | 27th Mar 2018 |
| 185.252.64.0/22 | 1k | RIPE NCC | GB | 27th Mar 2018 |
| 185.255.180.0/22 | 1k | RIPE NCC | GB | 16th Apr 2018 |
| 185.255.232.0/22 | 1k | RIPE NCC | GB | 16th Apr 2018 |
| 185.26.12.0/22 | 1k | RIPE NCC | GB | 13th May 2013 |
| 185.27.176.0/22 | 1k | RIPE NCC | GB | 3rd Jun 2013 |
| 185.29.172.0/22 | 1k | RIPE NCC | GB | 28th Jun 2013 |
| 185.29.208.0/24 | 256 | RIPE NCC | GB | 1st Oct 2024 |
| 185.31.232.0/22 | 1k | RIPE NCC | GB | 29th Jul 2013 |
| 185.31.252.0/22 | 1k | RIPE NCC | GB | 30th Jul 2013 |
| 185.32.40.0/22 | 1k | RIPE NCC | GB | 31st Jul 2013 |