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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
556 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.46.12.0/22 | 1k | RIPE NCC |  AT | 21st Sept 1993 |
| 193.46.136.0/21 | 2k | RIPE NCC | AT | 30th Mar 1999 |
| 193.46.144.0/20 | 4.1k | RIPE NCC | AT | 30th Mar 1999 |
| 193.46.16.0/22 | 1k | RIPE NCC | AT | 21st Sept 1993 |
| 193.46.160.0/21 | 2k | RIPE NCC | AT | 30th Mar 1999 |
| 193.46.168.0/22 | 1k | RIPE NCC | AT | 30th Mar 1999 |
| 193.46.191.0/24 | 256 | RIPE NCC | AT | 24th Feb 1994 |
| 193.46.222.0/23 | 512 | RIPE NCC | AT | 9th Oct 2019 |
| 193.46.253.0/24 | 256 | RIPE NCC | AT | 14th Apr 1994 |
| 193.46.44.0/24 | 256 | RIPE NCC | AT | 12th Dec 1997 |
| 193.46.78.0/23 | 512 | RIPE NCC | AT | 9th Oct 2019 |
| 193.58.210.0/23 | 512 | RIPE NCC | AT | 15th Oct 1997 |
| 193.58.212.0/22 | 1k | RIPE NCC | AT | 15th Oct 1997 |
| 194.0.10.0/24 | 256 | RIPE NCC | AT | 11th Jun 2009 |
| 194.0.132.0/24 | 256 | RIPE NCC | AT | 30th Dec 2024 |
| 194.107.132.0/22 | 1k | RIPE NCC | AT | 10th Jan 1995 |
| 194.107.145.0/24 | 256 | RIPE NCC | AT | 9th Feb 1995 |
| 194.107.146.0/23 | 512 | RIPE NCC | AT | 9th Feb 1995 |
| 194.107.167.0/24 | 256 | RIPE NCC | AT | 1st Mar 1995 |
| 194.107.168.0/21 | 2k | RIPE NCC | AT | 16th Feb 1995 |
| 194.107.208.0/20 | 4.1k | RIPE NCC | AT | 6th Mar 1995 |
| 194.107.48.0/22 | 1k | RIPE NCC | AT | 10th Nov 1994 |
| 194.113.164.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.113.169.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.113.170.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.113.172.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.145.142.0/23 | 512 | RIPE NCC | AT | 31st Oct 2019 |
| 194.145.196.0/23 | 512 | RIPE NCC | AT | 31st Oct 2019 |
| 194.153.220.0/22 | 1k | RIPE NCC | AT | 16th Dec 1999 |
| 194.156.235.0/24 | 256 | RIPE NCC | AT | 22nd Nov 2019 |
| 194.177.12.0/24 | 256 | RIPE NCC | AT | 6th Feb 2024 |
| 194.37.112.0/20 | 4.1k | RIPE NCC | AT | 8th Mar 1994 |
| 194.37.128.0/18 | 16.4k | RIPE NCC | AT | 8th Mar 1994 |
| 194.37.16.0/20 | 4.1k | RIPE NCC | AT | 2nd May 2002 |
| 194.37.192.0/19 | 8.2k | RIPE NCC | AT | 8th Mar 1994 |
| 194.37.224.0/21 | 2k | RIPE NCC | AT | 8th Mar 1994 |
| 194.37.232.0/21 | 2k | RIPE NCC | AT | 10th Mar 1994 |
| 194.37.32.0/20 | 4.1k | RIPE NCC | AT | 2nd May 2002 |
| 194.37.48.0/21 | 2k | RIPE NCC | AT | 2nd May 2002 |
| 194.48.16.0/20 | 4.1k | RIPE NCC | AT | 6th Jul 1999 |
| 194.48.240.0/24 | 256 | RIPE NCC | AT | 26th Jul 1994 |
| 194.48.8.0/21 | 2k | RIPE NCC | AT | 6th Jul 1999 |
| 194.49.108.0/23 | 512 | RIPE NCC | AT | 23rd Oct 2019 |
| 194.49.112.0/23 | 512 | RIPE NCC | AT | 23rd Oct 2019 |
| 194.5.184.0/22 | 1k | RIPE NCC | AT | 14th May 2018 |
| 194.56.76.0/22 | 1k | RIPE NCC | AT | 30th Jul 2018 |
| 194.99.66.0/23 | 512 | RIPE NCC | AT | 28th Oct 2019 |
| 195.130.204.0/24 | 256 | RIPE NCC | AT | 25th Nov 2019 |
| 195.130.206.0/24 | 256 | RIPE NCC | AT | 25th Nov 2019 |
| 195.14.120.0/23 | 512 | RIPE NCC | AT | 9th Jul 2010 |