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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 Austria
554 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 103.82.160.0/22 | 1k | RIPE NCC |  AT | 29th Dec 2016 |
| 109.230.210.0/24 | 256 | RIPE NCC | AT | 24th Feb 2010 |
| 145.11.16.0/21 | 2k | RIPE NCC | AT | 1st Sept 1993 |
| 146.19.243.0/24 | 256 | RIPE NCC | AT | 19th Nov 2021 |
| 147.78.220.0/22 | 1k | RIPE NCC | AT | 22nd Jan 2019 |
| 153.56.192.0/21 | 2k | RIPE NCC | AT | 23rd Sept 1991 |
| 159.200.206.0/23 | 512 | RIPE NCC | AT | 1st Sept 1993 |
| 180.149.40.0/22 | 1k | RIPE NCC | AT | 31st Aug 2009 |
| 185.1.31.0/24 | 256 | RIPE NCC | AT | 18th Aug 2014 |
| 185.1.43.0/24 | 256 | RIPE NCC | AT | 1st Apr 2015 |
| 185.114.225.0/24 | 256 | RIPE NCC | AT | 26th Aug 2015 |
| 185.115.124.0/22 | 1k | RIPE NCC | AT | 1st Sept 2015 |
| 185.115.128.0/22 | 1k | RIPE NCC | AT | 1st Sept 2015 |
| 185.115.206.0/24 | 256 | RIPE NCC | AT | 25th Jan 2022 |
| 185.117.20.0/22 | 1k | RIPE NCC | AT | 11th Sept 2015 |
| 185.118.117.0/24 | 256 | RIPE NCC | AT | 10th Jan 2024 |
| 185.120.20.0/22 | 1k | RIPE NCC | AT | 6th Oct 2015 |
| 185.120.4.0/22 | 1k | RIPE NCC | AT | 6th Oct 2015 |
| 185.122.56.0/22 | 1k | RIPE NCC | AT | 20th Oct 2015 |
| 185.129.160.0/22 | 1k | RIPE NCC | AT | 23rd Feb 2018 |
| 185.133.192.0/22 | 1k | RIPE NCC | AT | 7th Jan 2016 |
| 185.136.228.0/22 | 1k | RIPE NCC | AT | 2nd Feb 2016 |
| 185.155.117.0/24 | 256 | RIPE NCC | AT | 27th Jan 2026 |
| 185.156.144.0/22 | 1k | RIPE NCC | AT | 17th Jun 2016 |
| 185.157.123.0/24 | 256 | RIPE NCC | AT | 25th Jan 2022 |
| 185.163.50.0/24 | 256 | RIPE NCC | AT | 17th Apr 2020 |
| 185.171.0.0/22 | 1k | RIPE NCC | AT | 4th Oct 2016 |
| 185.172.144.0/22 | 1k | RIPE NCC | AT | 12th Oct 2016 |
| 185.173.140.0/22 | 1k | RIPE NCC | AT | 18th Oct 2016 |
| 185.182.60.0/22 | 1k | RIPE NCC | AT | 14th Dec 2016 |
| 185.184.140.0/22 | 1k | RIPE NCC | AT | 4th Jan 2017 |
| 185.184.41.0/24 | 256 | RIPE NCC | AT | 16th Aug 2023 |
| 185.185.248.0/22 | 1k | RIPE NCC | AT | 16th Jan 2017 |
| 185.193.192.0/22 | 1k | RIPE NCC | AT | 9th Mar 2017 |
| 185.193.36.0/22 | 1k | RIPE NCC | AT | 6th Mar 2017 |
| 185.202.150.0/24 | 256 | RIPE NCC | AT | 9th May 2017 |
| 185.203.80.0/22 | 1k | RIPE NCC | AT | 12th May 2017 |
| 185.208.12.0/22 | 1k | RIPE NCC | AT | 12th Jun 2017 |
| 185.208.168.0/22 | 1k | RIPE NCC | AT | 15th Jun 2017 |
| 185.214.68.0/22 | 1k | RIPE NCC | AT | 25th Jul 2017 |
| 185.215.212.0/22 | 1k | RIPE NCC | AT | 2nd Aug 2017 |
| 185.223.164.0/22 | 1k | RIPE NCC | AT | 26th Aug 2019 |
| 185.224.144.0/22 | 1k | RIPE NCC | AT | 9th Oct 2017 |
| 185.226.72.0/22 | 1k | RIPE NCC | AT | 17th Oct 2017 |
| 185.232.89.0/24 | 256 | RIPE NCC | AT | 4th Jan 2021 |
| 185.235.152.0/22 | 1k | RIPE NCC | AT | 5th Dec 2017 |
| 185.236.80.0/22 | 1k | RIPE NCC | AT | 11th Dec 2017 |
| 185.253.248.0/22 | 1k | RIPE NCC | AT | 5th Apr 2018 |
| 185.36.20.0/24 | 256 | RIPE NCC | AT | 16th Jun 2026 |
| 185.39.11.0/24 | 256 | RIPE NCC | AT | 8th Dec 2021 |