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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.203.196.0/22 | 1k | RIPE NCC |  CH | 16th May 2017 |
| 185.205.120.0/22 | 1k | RIPE NCC | CH | 26th May 2017 |
| 185.215.112.0/24 | 256 | RIPE NCC | CH | 13th Nov 2020 |
| 185.215.7.0/24 | 256 | RIPE NCC | CH | 12th Apr 2021 |
| 185.216.136.0/24 | 256 | RIPE NCC | CH | 7th Aug 2017 |
| 185.218.116.0/22 | 1k | RIPE NCC | CH | 22nd Aug 2017 |
| 185.222.209.0/24 | 256 | RIPE NCC | CH | 30th Nov 2020 |
| 185.224.244.0/22 | 1k | RIPE NCC | CH | 11th Oct 2017 |
| 185.225.125.0/24 | 256 | RIPE NCC | CH | 16th Dec 2020 |
| 185.227.20.0/22 | 1k | RIPE NCC | CH | 20th Oct 2017 |
| 185.234.16.0/22 | 1k | RIPE NCC | CH | 27th Nov 2017 |
| 185.237.108.0/22 | 1k | RIPE NCC | CH | 18th Dec 2017 |
| 185.237.112.0/22 | 1k | RIPE NCC | CH | 18th Dec 2017 |
| 185.237.116.0/22 | 1k | RIPE NCC | CH | 18th Dec 2017 |
| 185.237.120.0/22 | 1k | RIPE NCC | CH | 18th Dec 2017 |
| 185.253.131.0/24 | 256 | RIPE NCC | CH | 12th Nov 2025 |
| 185.33.20.0/22 | 1k | RIPE NCC | CH | 15th Aug 2013 |
| 185.46.4.0/22 | 1k | RIPE NCC | CH | 20th Feb 2018 |
| 185.47.24.0/22 | 1k | RIPE NCC | CH | 6th Feb 2014 |
| 185.60.181.0/24 | 256 | RIPE NCC | CH | 28th May 2026 |
| 185.62.104.0/22 | 1k | RIPE NCC | CH | 30th Jun 2014 |
| 185.63.115.0/24 | 256 | RIPE NCC | CH | 27th Jun 2022 |
| 185.66.156.0/22 | 1k | RIPE NCC | CH | 8th Aug 2014 |
| 185.74.28.0/22 | 1k | RIPE NCC | CH | 22nd Oct 2014 |
| 185.77.0.0/24 | 256 | RIPE NCC | CH | 13th Nov 2014 |
| 185.84.76.0/22 | 1k | RIPE NCC | CH | 15th Jan 2015 |
| 185.85.8.0/22 | 1k | RIPE NCC | CH | 21st Jan 2015 |
| 185.87.112.0/22 | 1k | RIPE NCC | CH | 10th Feb 2015 |
| 185.89.188.0/22 | 1k | RIPE NCC | CH | 26th Feb 2015 |
| 185.96.76.0/22 | 1k | RIPE NCC | CH | 15th Apr 2015 |
| 185.98.24.0/24 | 256 | RIPE NCC | CH | 23rd Jan 2026 |
| 188.92.1.0/24 | 256 | RIPE NCC | CH | 25th Jun 2024 |
| 188.92.3.0/24 | 256 | RIPE NCC | CH | 26th Jun 2024 |
| 192.104.251.0/24 | 256 | RIPE NCC | CH | 21st Jun 1991 |
| 192.104.72.0/24 | 256 | RIPE NCC | CH | 9th May 1991 |
| 192.108.234.0/24 | 256 | RIPE NCC | CH | 2nd Aug 1991 |
| 192.109.30.0/24 | 256 | RIPE NCC | CH | 12th Nov 2019 |
| 192.109.47.0/24 | 256 | RIPE NCC | CH | 12th Nov 2019 |
| 192.111.103.0/24 | 256 | RIPE NCC | CH | 7th Aug 1991 |
| 192.111.48.0/24 | 256 | RIPE NCC | CH | 7th Jun 1991 |
| 192.112.214.0/24 | 256 | RIPE NCC | CH | 17th Sept 1991 |
| 192.12.217.0/24 | 256 | RIPE NCC | CH | 9th Jun 1988 |
| 192.12.218.0/24 | 256 | RIPE NCC | CH | 9th Jun 1988 |
| 192.132.252.0/24 | 256 | RIPE NCC | CH | 20th Nov 1991 |
| 192.135.145.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 192.135.146.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 192.135.160.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 192.135.164.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 192.136.156.0/24 | 256 | RIPE NCC | CH | 22nd Oct 1992 |
| 192.136.41.0/24 | 256 | RIPE NCC | CH | 26th Dec 1991 |