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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 Switzerland
950 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.147.151.0/24 | 256 | RIPE NCC |  CH | 1st Sept 1993 |
| 194.147.208.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.210.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.229.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.231.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.232.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.233.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.254.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.45.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.147.66.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.150.198.0/23 | 512 | RIPE NCC | CH | 17th Aug 2004 |
| 194.153.153.64/26 | 64 | RIPE NCC | CH | 19th Sept 2025 |
| 194.153.157.128/27 | 32 | RIPE NCC | CH | 21st Mar 2011 |
| 194.153.83.0/24 | 256 | RIPE NCC | CH | 17th Nov 2009 |
| 194.169.199.0/24 | 256 | RIPE NCC | CH | 1st Dec 2006 |
| 194.180.240.0/24 | 256 | RIPE NCC | CH | 30th Apr 2025 |
| 194.180.247.0/24 | 256 | RIPE NCC | CH | 30th Apr 2025 |
| 194.213.7.0/24 | 256 | RIPE NCC | CH | 6th Sept 2005 |
| 194.242.51.0/24 | 256 | RIPE NCC | CH | 3rd May 2001 |
| 194.26.248.0/21 | 2k | RIPE NCC | CH | 29th Sept 1995 |
| 194.31.239.0/24 | 256 | RIPE NCC | CH | 21st Nov 2019 |
| 194.31.247.0/24 | 256 | RIPE NCC | CH | 21st Nov 2019 |
| 194.31.254.0/24 | 256 | RIPE NCC | CH | 7th Jun 2012 |
| 194.34.140.0/22 | 1k | RIPE NCC | CH | 15th Feb 1994 |
| 194.4.16.0/20 | 4.1k | RIPE NCC | CH | 4th Oct 1993 |
| 194.4.32.0/21 | 2k | RIPE NCC | CH | 4th Oct 1993 |
| 194.40.192.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 194.40.212.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 194.40.216.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 194.40.224.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 194.40.249.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.41.64.0/19 | 8.2k | RIPE NCC | CH | 13th Oct 1994 |
| 194.42.162.0/24 | 256 | RIPE NCC | CH | 13th Feb 1998 |
| 194.42.48.0/24 | 256 | RIPE NCC | CH | 12th Oct 1999 |
| 194.48.100.0/22 | 1k | RIPE NCC | CH | 26th Jul 2018 |
| 194.48.104.0/22 | 1k | RIPE NCC | CH | 17th May 2018 |
| 194.48.201.0/24 | 256 | RIPE NCC | CH | 3rd May 2023 |
| 194.5.136.0/21 | 2k | RIPE NCC | CH | 6th Jan 1995 |
| 194.5.144.0/24 | 256 | RIPE NCC | CH | 6th Jan 1995 |
| 194.50.34.0/24 | 256 | RIPE NCC | CH | 7th Mar 2006 |
| 194.56.112.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.120.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.154.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.156.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.200.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.204.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.206.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.208.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.220.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 194.56.228.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |