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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.64.28.0/24 | 256 | RIPE NCC |  AT | 13th Jan 1994 |
| 192.68.4.0/24 | 256 | RIPE NCC | AT | 8th Dec 1992 |
| 192.76.244.0/24 | 256 | RIPE NCC | AT | 8th Oct 1990 |
| 192.82.158.0/24 | 256 | RIPE NCC | AT | 3rd Aug 1990 |
| 192.84.27.0/24 | 256 | RIPE NCC | AT | 23rd Oct 1990 |
| 192.92.141.0/24 | 256 | RIPE NCC | AT | 5th Feb 1991 |
| 192.94.239.0/24 | 256 | RIPE NCC | AT | 6th Mar 1991 |
| 192.94.57.0/24 | 256 | RIPE NCC | AT | 15th Feb 1991 |
| 193.104.65.0/24 | 256 | RIPE NCC | AT | 20th Oct 2009 |
| 193.105.214.0/24 | 256 | RIPE NCC | AT | 17th Mar 2010 |
| 193.105.86.0/24 | 256 | RIPE NCC | AT | 29th Jan 2010 |
| 193.109.148.0/22 | 1k | RIPE NCC | AT | 27th Sept 2001 |
| 193.149.160.0/22 | 1k | RIPE NCC | AT | 24th Jan 1996 |
| 193.150.174.0/23 | 512 | RIPE NCC | AT | 1st Dec 1997 |
| 193.150.176.0/22 | 1k | RIPE NCC | AT | 1st Dec 1997 |
| 193.16.8.0/22 | 1k | RIPE NCC | AT | 6th Jul 2018 |
| 193.160.212.0/22 | 1k | RIPE NCC | AT | 14th Sept 2018 |
| 193.164.234.0/23 | 512 | RIPE NCC | AT | 6th Jul 2000 |
| 193.164.240.0/23 | 512 | RIPE NCC | AT | 6th Jul 2000 |
| 193.177.216.0/22 | 1k | RIPE NCC | AT | 17th Sept 2018 |
| 193.178.148.0/23 | 512 | RIPE NCC | AT | 14th Feb 2001 |
| 193.178.160.0/24 | 256 | RIPE NCC | AT | 15th Feb 2001 |
| 193.186.112.0/20 | 4.1k | RIPE NCC | AT | 18th Dec 2001 |
| 193.186.128.0/19 | 8.2k | RIPE NCC | AT | 18th Dec 2001 |
| 193.186.209.0/24 | 256 | RIPE NCC | AT | 11th Feb 1997 |
| 193.186.214.0/24 | 256 | RIPE NCC | AT | 12th May 1993 |
| 193.186.248.0/22 | 1k | RIPE NCC | AT | 16th Jun 1993 |
| 193.186.64.0/21 | 2k | RIPE NCC | AT | 11th Feb 1993 |
| 193.187.152.0/22 | 1k | RIPE NCC | AT | 27th Nov 2018 |
| 193.187.244.0/24 | 256 | RIPE NCC | AT | 6th Sept 1993 |
| 193.187.245.0/24 | 256 | RIPE NCC | AT | 4th Oct 1993 |
| 193.187.246.0/24 | 256 | RIPE NCC | AT | 7th Oct 1993 |
| 193.187.247.0/24 | 256 | RIPE NCC | AT | 22nd Nov 1993 |
| 193.194.146.0/24 | 256 | RIPE NCC | AT | 5th Mar 1999 |
| 193.200.142.0/24 | 256 | RIPE NCC | AT | 27th Apr 2007 |
| 193.22.156.0/22 | 1k | RIPE NCC | AT | 7th Sept 2018 |
| 193.22.82.0/24 | 256 | RIPE NCC | AT | 16th Jun 2004 |
| 193.222.100.0/22 | 1k | RIPE NCC | AT | 19th Jul 2018 |
| 193.228.170.0/23 | 512 | RIPE NCC | AT | 27th Jun 1995 |
| 193.228.192.0/24 | 256 | RIPE NCC | AT | 26th Sept 1995 |
| 193.228.203.0/24 | 256 | RIPE NCC | AT | 9th Nov 1995 |
| 193.228.207.0/24 | 256 | RIPE NCC | AT | 14th Nov 1995 |
| 193.228.63.0/24 | 256 | RIPE NCC | AT | 20th Apr 1995 |
| 193.228.64.0/21 | 2k | RIPE NCC | AT | 13th Apr 1995 |
| 193.228.88.0/23 | 512 | RIPE NCC | AT | 2nd May 1995 |
| 193.228.92.0/24 | 256 | RIPE NCC | AT | 8th May 1995 |
| 193.246.126.0/24 | 256 | RIPE NCC | AT | 28th May 1997 |
| 193.37.144.0/24 | 256 | RIPE NCC | AT | 18th Oct 2006 |
| 193.43.142.0/23 | 512 | RIPE NCC | AT | 9th Oct 2019 |
| 193.46.1.0/24 | 256 | RIPE NCC | AT | 11th Dec 1997 |