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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 45.89.0.0/22 | 1k | RIPE NCC |  CH | 20th Jun 2019 |
| 45.91.204.0/22 | 1k | RIPE NCC | CH | 27th Jun 2019 |
| 46.21.20.0/24 | 256 | RIPE NCC | CH | 25th Oct 2010 |
| 46.28.200.0/21 | 2k | RIPE NCC | CH | 5th Aug 2011 |
| 46.36.202.0/24 | 256 | RIPE NCC | CH | 10th Jan 2024 |
| 5.154.186.0/24 | 256 | RIPE NCC | CH | 19th Jul 2012 |
| 5.159.193.0/24 | 256 | RIPE NCC | CH | 26th Jan 2026 |
| 5.159.194.0/24 | 256 | RIPE NCC | CH | 26th Jan 2026 |
| 5.181.13.0/24 | 256 | RIPE NCC | CH | 1st Apr 2019 |
| 5.182.61.0/24 | 256 | RIPE NCC | CH | 21st Jan 2026 |
| 5.187.36.0/23 | 512 | RIPE NCC | CH | 9th Aug 2012 |
| 5.252.136.0/22 | 1k | RIPE NCC | CH | 5th Feb 2019 |
| 57.0.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.12.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.14.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.186.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.189.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.2.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.20.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.206.128.0/17 | 32.8k | RIPE NCC | CH | 21st Jun 1993 |
| 57.206.16.0/20 | 4.1k | RIPE NCC | CH | 21st Jun 1993 |
| 57.206.2.0/23 | 512 | RIPE NCC | CH | 21st Jun 1993 |
| 57.206.32.0/19 | 8.2k | RIPE NCC | CH | 21st Jun 1993 |
| 57.206.4.0/22 | 1k | RIPE NCC | CH | 21st Jun 1993 |
| 57.206.64.0/18 | 16.4k | RIPE NCC | CH | 21st Jun 1993 |
| 57.206.8.0/21 | 2k | RIPE NCC | CH | 21st Jun 1993 |
| 57.22.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.224.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.227.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.228.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.231.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.232.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.235.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.237.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.24.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.245.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.247.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.249.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.252.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.26.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.28.0.0/15 | 131k | RIPE NCC | CH | 21st Jun 1993 |
| 57.32.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.34.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.37.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.39.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.40.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.48.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.51.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.53.0.0/16 | 65.5k | RIPE NCC | CH | 21st Jun 1993 |
| 57.56.0.0/14 | 262k | RIPE NCC | CH | 21st Jun 1993 |