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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 Austria
556 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 45.80.176.0/22 | 1k | RIPE NCC |  AT | 15th May 2019 |
| 45.81.236.0/22 | 1k | RIPE NCC | AT | 21st May 2019 |
| 45.81.244.0/22 | 1k | RIPE NCC | AT | 21st May 2019 |
| 45.81.8.0/22 | 1k | RIPE NCC | AT | 16th May 2019 |
| 45.82.204.0/22 | 1k | RIPE NCC | AT | 24th May 2019 |
| 45.83.252.0/22 | 1k | RIPE NCC | AT | 28th May 2019 |
| 45.85.84.0/22 | 1k | RIPE NCC | AT | 5th Jun 2019 |
| 45.86.192.0/22 | 1k | RIPE NCC | AT | 13th Jun 2019 |
| 45.89.12.0/22 | 1k | RIPE NCC | AT | 20th Jun 2019 |
| 45.91.24.0/22 | 1k | RIPE NCC | AT | 26th Jun 2019 |
| 45.92.212.0/22 | 1k | RIPE NCC | AT | 1st Jul 2019 |
| 45.94.164.0/22 | 1k | RIPE NCC | AT | 8th Jul 2019 |
| 45.95.140.0/22 | 1k | RIPE NCC | AT | 10th Jul 2019 |
| 46.251.239.0/24 | 256 | RIPE NCC | AT | 9th Feb 2011 |
| 5.181.148.0/22 | 1k | RIPE NCC | AT | 2nd Apr 2019 |
| 5.183.244.0/22 | 1k | RIPE NCC | AT | 11th Apr 2019 |
| 77.243.92.0/22 | 1k | RIPE NCC | AT | 9th Aug 2018 |
| 77.83.156.0/22 | 1k | RIPE NCC | AT | 13th Dec 2018 |
| 79.143.48.0/20 | 4.1k | RIPE NCC | AT | 20th Nov 2007 |
| 79.174.96.0/19 | 8.2k | RIPE NCC | AT | 16th Jun 2008 |
| 79.99.140.0/22 | 1k | RIPE NCC | AT | 22nd Nov 2007 |
| 80.224.255.0/24 | 256 | RIPE NCC | AT | 28th Sept 2001 |
| 80.68.149.0/24 | 256 | RIPE NCC | AT | 25th Jan 2022 |
| 81.16.136.0/22 | 1k | RIPE NCC | AT | 16th Aug 2018 |
| 84.234.56.0/22 | 1k | RIPE NCC | AT | 2nd Jul 2009 |
| 84.38.112.0/20 | 4.1k | RIPE NCC | AT | 23rd May 2006 |
| 84.39.184.0/21 | 2k | RIPE NCC | AT | 3rd Sept 2012 |
| 85.137.184.0/21 | 2k | RIPE NCC | AT | 3rd Nov 2004 |
| 85.208.152.0/22 | 1k | RIPE NCC | AT | 21st Feb 2019 |
| 85.209.252.0/22 | 1k | RIPE NCC | AT | 1st Mar 2019 |
| 85.8.233.0/24 | 256 | RIPE NCC | AT | 30th Jun 2026 |
| 86.107.244.0/23 | 512 | RIPE NCC | AT | 18th Apr 2005 |
| 87.239.48.0/22 | 1k | RIPE NCC | AT | 21st Jun 2018 |
| 89.42.158.0/23 | 512 | RIPE NCC | AT | 29th Nov 2005 |
| 91.188.200.0/22 | 1k | RIPE NCC | AT | 20th Nov 2018 |
| 91.189.184.0/22 | 1k | RIPE NCC | AT | 25th Jun 2018 |
| 91.194.148.0/24 | 256 | RIPE NCC | AT | 22nd Sept 2021 |
| 91.198.128.0/24 | 256 | RIPE NCC | AT | 26th May 2025 |
| 91.199.60.0/24 | 256 | RIPE NCC | AT | 4th Dec 2007 |
| 91.206.202.0/23 | 512 | RIPE NCC | AT | 3rd Oct 2019 |
| 91.206.204.0/23 | 512 | RIPE NCC | AT | 3rd Oct 2019 |
| 91.206.238.0/23 | 512 | RIPE NCC | AT | 29th Aug 2008 |
| 91.208.169.0/24 | 256 | RIPE NCC | AT | 27th Aug 2008 |
| 91.212.172.0/24 | 256 | RIPE NCC | AT | 19th Sept 2022 |
| 91.215.240.0/22 | 1k | RIPE NCC | AT | 1st Sept 2009 |
| 91.216.8.0/24 | 256 | RIPE NCC | AT | 27th Aug 2012 |
| 91.225.0.0/24 | 256 | RIPE NCC | AT | 2nd Dec 2020 |
| 91.227.241.0/24 | 256 | RIPE NCC | AT | 18th May 2011 |
| 91.239.15.0/24 | 256 | RIPE NCC | AT | 11th Nov 2019 |
| 91.239.37.0/24 | 256 | RIPE NCC | AT | 11th Nov 2019 |