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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Germany
2,786 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 31.211.176.0/21 | 2k | RIPE NCC |  DE | 9th May 2011 |
| 31.214.149.0/24 | 256 | RIPE NCC | DE | 6th May 2011 |
| 31.220.12.0/23 | 512 | RIPE NCC | DE | 10th May 2011 |
| 31.220.147.0/24 | 256 | RIPE NCC | DE | 11th May 2011 |
| 31.220.36.0/22 | 1k | RIPE NCC | DE | 10th May 2011 |
| 31.220.8.0/22 | 1k | RIPE NCC | DE | 10th May 2011 |
| 31.222.231.0/24 | 256 | RIPE NCC | DE | 6th Oct 2021 |
| 31.222.254.0/24 | 256 | RIPE NCC | DE | 7th Oct 2021 |
| 31.24.84.0/24 | 256 | RIPE NCC | DE | 11th Jan 2022 |
| 31.3.148.0/23 | 512 | RIPE NCC | DE | 3rd Aug 2011 |
| 31.31.92.0/22 | 1k | RIPE NCC | DE | 18th Mar 2011 |
| 31.40.215.0/24 | 256 | RIPE NCC | DE | 9th Nov 2018 |
| 37.10.120.0/22 | 1k | RIPE NCC | DE | 15th Dec 2011 |
| 37.122.128.0/21 | 2k | RIPE NCC | DE | 14th Feb 2012 |
| 37.122.208.0/21 | 2k | RIPE NCC | DE | 14th Feb 2012 |
| 37.131.176.0/23 | 512 | RIPE NCC | DE | 23rd Feb 2012 |
| 37.131.178.0/24 | 256 | RIPE NCC | DE | 23rd Feb 2012 |
| 37.200.84.0/24 | 256 | RIPE NCC | DE | 4th May 2020 |
| 37.252.223.0/24 | 256 | RIPE NCC | DE | 27th May 2021 |
| 37.35.72.0/21 | 2k | RIPE NCC | DE | 5th Jan 2012 |
| 45.12.92.0/22 | 1k | RIPE NCC | DE | 1st May 2019 |
| 45.128.224.0/22 | 1k | RIPE NCC | DE | 12th Jul 2019 |
| 45.128.252.0/22 | 1k | RIPE NCC | DE | 12th Jul 2019 |
| 45.129.93.0/24 | 256 | RIPE NCC | DE | 15th Jul 2019 |
| 45.13.216.0/22 | 1k | RIPE NCC | DE | 7th May 2019 |
| 45.130.232.0/22 | 1k | RIPE NCC | DE | 18th Jul 2019 |
| 45.131.232.0/22 | 1k | RIPE NCC | DE | 22nd Jul 2019 |
| 45.132.52.0/22 | 1k | RIPE NCC | DE | 22nd Jul 2019 |
| 45.134.188.0/22 | 1k | RIPE NCC | DE | 29th Jul 2019 |
| 45.136.184.0/22 | 1k | RIPE NCC | DE | 2nd Aug 2019 |
| 45.137.140.0/22 | 1k | RIPE NCC | DE | 5th Aug 2019 |
| 45.137.168.0/22 | 1k | RIPE NCC | DE | 5th Aug 2019 |
| 45.137.76.0/22 | 1k | RIPE NCC | DE | 5th Aug 2019 |
| 45.137.92.0/22 | 1k | RIPE NCC | DE | 5th Aug 2019 |
| 45.138.240.0/22 | 1k | RIPE NCC | DE | 8th Aug 2019 |
| 45.139.116.0/22 | 1k | RIPE NCC | DE | 9th Aug 2019 |
| 45.139.248.0/22 | 1k | RIPE NCC | DE | 12th Aug 2019 |
| 45.14.100.0/22 | 1k | RIPE NCC | DE | 8th May 2019 |
| 45.14.212.0/22 | 1k | RIPE NCC | DE | 9th May 2019 |
| 45.140.200.0/22 | 1k | RIPE NCC | DE | 13th Aug 2019 |
| 45.141.220.0/22 | 1k | RIPE NCC | DE | 15th Aug 2019 |
| 45.142.4.0/22 | 1k | RIPE NCC | DE | 16th Aug 2019 |
| 45.144.80.0/22 | 1k | RIPE NCC | DE | 22nd Aug 2019 |
| 45.144.96.0/22 | 1k | RIPE NCC | DE | 22nd Aug 2019 |
| 45.145.37.0/24 | 256 | RIPE NCC | DE | 29th Jan 2024 |
| 45.146.20.0/22 | 1k | RIPE NCC | DE | 27th Aug 2019 |
| 45.146.92.0/22 | 1k | RIPE NCC | DE | 28th Aug 2019 |
| 45.147.172.0/22 | 1k | RIPE NCC | DE | 30th Aug 2019 |
| 45.147.36.0/22 | 1k | RIPE NCC | DE | 30th Aug 2019 |
| 45.147.86.0/24 | 256 | RIPE NCC | DE | 30th Aug 2019 |