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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.138.230.0/24 | 256 | RIPE NCC |  CH | 17th Jan 1992 |
| 192.138.231.0/24 | 256 | RIPE NCC | CH | 17th Jan 1992 |
| 192.138.232.0/24 | 256 | RIPE NCC | CH | 17th Jan 1992 |
| 192.153.89.0/24 | 256 | RIPE NCC | CH | 31st Mar 1992 |
| 192.157.189.0/24 | 256 | RIPE NCC | CH | 14th Feb 1995 |
| 192.160.95.0/24 | 256 | RIPE NCC | CH | 18th May 1992 |
| 192.160.96.0/24 | 256 | RIPE NCC | CH | 18th May 1992 |
| 192.238.1.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 192.238.10.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 192.238.2.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 192.238.4.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 192.238.8.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 192.37.0.0/16 | 65.5k | RIPE NCC | CH | 20th Aug 1993 |
| 192.41.141.0/24 | 256 | RIPE NCC | CH | 30th Jun 1988 |
| 192.41.142.0/23 | 512 | RIPE NCC | CH | 30th Jun 1988 |
| 192.41.144.0/23 | 512 | RIPE NCC | CH | 30th Jun 1988 |
| 192.54.132.0/24 | 256 | RIPE NCC | CH | 8th Jun 1989 |
| 192.65.94.0/24 | 256 | RIPE NCC | CH | 8th Nov 1989 |
| 192.73.35.0/24 | 256 | RIPE NCC | CH | 18th May 1990 |
| 192.73.36.0/22 | 1k | RIPE NCC | CH | 18th May 1990 |
| 192.73.40.0/22 | 1k | RIPE NCC | CH | 18th May 1990 |
| 192.73.44.0/24 | 256 | RIPE NCC | CH | 18th May 1990 |
| 192.77.11.0/24 | 256 | RIPE NCC | CH | 17th Oct 1990 |
| 192.80.31.0/24 | 256 | RIPE NCC | CH | 3rd May 1990 |
| 192.80.32.0/21 | 2k | RIPE NCC | CH | 3rd May 1990 |
| 192.80.40.0/23 | 512 | RIPE NCC | CH | 3rd May 1990 |
| 192.80.42.0/24 | 256 | RIPE NCC | CH | 3rd May 1990 |
| 192.84.166.0/24 | 256 | RIPE NCC | CH | 31st Oct 1990 |
| 192.86.166.0/24 | 256 | RIPE NCC | CH | 10th Dec 1990 |
| 192.88.1.0/24 | 256 | RIPE NCC | CH | 28th Nov 1990 |
| 192.92.128.0/24 | 256 | RIPE NCC | CH | 7th Jan 1994 |
| 192.92.139.0/24 | 256 | RIPE NCC | CH | 5th Feb 1991 |
| 193.0.32.0/20 | 4.1k | RIPE NCC | CH | 8th Jan 1998 |
| 193.0.48.0/21 | 2k | RIPE NCC | CH | 8th Jan 1998 |
| 193.104.185.0/24 | 256 | RIPE NCC | CH | 7th Dec 2009 |
| 193.104.61.0/24 | 256 | RIPE NCC | CH | 19th Oct 2009 |
| 193.108.187.0/24 | 256 | RIPE NCC | CH | 31st May 2001 |
| 193.110.20.0/22 | 1k | RIPE NCC | CH | 9th Nov 2001 |
| 193.134.102.0/23 | 512 | RIPE NCC | CH | 28th May 1997 |
| 193.134.224.0/20 | 4.1k | RIPE NCC | CH | 28th May 1997 |
| 193.134.40.0/22 | 1k | RIPE NCC | CH | 28th May 1997 |
| 193.134.44.0/22 | 1k | RIPE NCC | CH | 28th May 1997 |
| 193.134.48.0/20 | 4.1k | RIPE NCC | CH | 28th May 1997 |
| 193.134.80.0/21 | 2k | RIPE NCC | CH | 28th May 1997 |
| 193.134.88.0/22 | 1k | RIPE NCC | CH | 28th May 1997 |
| 193.134.92.0/24 | 256 | RIPE NCC | CH | 28th May 1997 |
| 193.134.95.0/24 | 256 | RIPE NCC | CH | 28th May 1997 |
| 193.135.107.0/24 | 256 | RIPE NCC | CH | 28th May 1997 |
| 193.135.139.0/24 | 256 | RIPE NCC | CH | 28th May 1997 |
| 193.135.14.0/24 | 256 | RIPE NCC | CH | 28th May 1997 |