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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.105.124.0/22 | 1k | RIPE NCC |  GB | 19th Jun 2015 |
| 185.107.180.0/22 | 1k | RIPE NCC | GB | 22nd Feb 2018 |
| 185.108.46.0/23 | 512 | RIPE NCC | GB | 8th Jul 2015 |
| 185.109.228.0/22 | 1k | RIPE NCC | GB | 17th Jul 2015 |
| 185.11.240.0/22 | 1k | RIPE NCC | GB | 30th Nov 2012 |
| 185.112.220.0/22 | 1k | RIPE NCC | GB | 11th Aug 2015 |
| 185.113.16.0/22 | 1k | RIPE NCC | GB | 12th Aug 2015 |
| 185.115.200.0/22 | 1k | RIPE NCC | GB | 3rd Sept 2015 |
| 185.117.200.0/22 | 1k | RIPE NCC | GB | 17th Sept 2015 |
| 185.12.232.0/22 | 1k | RIPE NCC | GB | 11th Dec 2012 |
| 185.121.144.0/22 | 1k | RIPE NCC | GB | 14th Oct 2015 |
| 185.121.220.0/22 | 1k | RIPE NCC | GB | 16th Oct 2015 |
| 185.123.80.0/22 | 1k | RIPE NCC | GB | 27th Oct 2015 |
| 185.123.96.0/22 | 1k | RIPE NCC | GB | 27th Oct 2015 |
| 185.126.120.0/22 | 1k | RIPE NCC | GB | 16th Nov 2015 |
| 185.127.248.0/22 | 1k | RIPE NCC | GB | 24th Nov 2015 |
| 185.13.204.0/22 | 1k | RIPE NCC | GB | 18th Dec 2012 |
| 185.131.202.0/24 | 256 | RIPE NCC | GB | 16th Mar 2026 |
| 185.133.176.0/22 | 1k | RIPE NCC | GB | 6th Jan 2016 |
| 185.136.232.0/22 | 1k | RIPE NCC | GB | 2nd Feb 2016 |
| 185.136.240.0/24 | 256 | RIPE NCC | GB | 21st Jan 2026 |
| 185.136.60.0/22 | 1k | RIPE NCC | GB | 27th Jan 2016 |
| 185.137.192.0/22 | 1k | RIPE NCC | GB | 8th Feb 2016 |
| 185.137.243.0/24 | 256 | RIPE NCC | GB | 8th Feb 2016 |
| 185.138.0.0/22 | 1k | RIPE NCC | GB | 9th Feb 2016 |
| 185.139.144.0/22 | 1k | RIPE NCC | GB | 18th Feb 2016 |
| 185.14.152.0/22 | 1k | RIPE NCC | GB | 31st Dec 2012 |
| 185.140.144.0/22 | 1k | RIPE NCC | GB | 26th Feb 2016 |
| 185.141.117.0/24 | 256 | RIPE NCC | GB | 2nd Mar 2016 |
| 185.141.118.0/24 | 256 | RIPE NCC | GB | 2nd Mar 2016 |
| 185.143.84.0/22 | 1k | RIPE NCC | GB | 14th Mar 2016 |
| 185.144.108.0/22 | 1k | RIPE NCC | GB | 23rd Mar 2016 |
| 185.144.140.0/22 | 1k | RIPE NCC | GB | 23rd Mar 2016 |
| 185.144.148.0/22 | 1k | RIPE NCC | GB | 24th Mar 2016 |
| 185.147.246.0/24 | 256 | RIPE NCC | GB | 18th Apr 2016 |
| 185.149.236.0/22 | 1k | RIPE NCC | GB | 29th Apr 2016 |
| 185.150.148.0/22 | 1k | RIPE NCC | GB | 3rd May 2016 |
| 185.150.3.0/24 | 256 | RIPE NCC | GB | 29th Apr 2016 |
| 185.155.244.0/22 | 1k | RIPE NCC | GB | 14th Jun 2016 |
| 185.156.164.0/22 | 1k | RIPE NCC | GB | 17th Jun 2016 |
| 185.158.76.0/22 | 1k | RIPE NCC | GB | 4th Jul 2016 |
| 185.162.100.0/22 | 1k | RIPE NCC | GB | 5th Aug 2016 |
| 185.162.252.0/22 | 1k | RIPE NCC | GB | 11th Aug 2016 |
| 185.164.196.0/22 | 1k | RIPE NCC | GB | 22nd Aug 2016 |
| 185.164.220.0/22 | 1k | RIPE NCC | GB | 23rd Aug 2016 |
| 185.165.180.0/22 | 1k | RIPE NCC | GB | 29th Aug 2016 |
| 185.166.94.0/24 | 256 | RIPE NCC | GB | 22nd Jan 2026 |
| 185.167.168.0/22 | 1k | RIPE NCC | GB | 13th Sept 2016 |
| 185.167.254.0/24 | 256 | RIPE NCC | GB | 29th Apr 2020 |
| 185.168.10.0/24 | 256 | RIPE NCC | GB | 14th Sept 2016 |