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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 109.107.133.0/24 | 256 | RIPE NCC |  CH | 21st Oct 2021 |
| 109.234.77.0/24 | 256 | RIPE NCC | CH | 26th Aug 2021 |
| 109.237.48.0/21 | 2k | RIPE NCC | CH | 13th Jan 2009 |
| 128.0.33.0/24 | 256 | RIPE NCC | CH | 14th Sept 2012 |
| 130.78.96.0/20 | 4.1k | RIPE NCC | CH | 24th Jun 1988 |
| 131.117.0.0/17 | 32.8k | RIPE NCC | CH | 31st May 1995 |
| 137.156.0.0/16 | 65.5k | RIPE NCC | CH | 12th Dec 1989 |
| 137.34.0.0/16 | 65.5k | RIPE NCC | CH | 1st Sept 1993 |
| 137.62.0.0/16 | 65.5k | RIPE NCC | CH | 1st Sept 1993 |
| 138.124.154.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 138.228.0.0/16 | 65.5k | RIPE NCC | CH | 1st Sept 1993 |
| 144.178.117.0/24 | 256 | RIPE NCC | CH | 2nd Dec 1992 |
| 144.178.254.0/24 | 256 | RIPE NCC | CH | 2nd Dec 1992 |
| 145.224.48.0/20 | 4.1k | RIPE NCC | CH | 6th May 1993 |
| 145.252.0.0/16 | 65.5k | RIPE NCC | CH | 10th Nov 1993 |
| 146.248.0.0/16 | 65.5k | RIPE NCC | CH | 6th Mar 1991 |
| 147.167.0.0/16 | 65.5k | RIPE NCC | CH | 9th May 1991 |
| 147.78.136.0/22 | 1k | RIPE NCC | CH | 21st Jan 2019 |
| 150.205.0.0/16 | 65.5k | RIPE NCC | CH | 7th Jun 1991 |
| 150.213.0.0/16 | 65.5k | RIPE NCC | CH | 11th Jun 1991 |
| 150.251.56.0/23 | 512 | RIPE NCC | CH | 19th Aug 1991 |
| 153.75.128.0/19 | 8.2k | RIPE NCC | CH | 23rd Sept 1991 |
| 153.92.41.0/24 | 256 | RIPE NCC | CH | 23rd Sept 1991 |
| 153.92.47.0/24 | 256 | RIPE NCC | CH | 23rd Sept 1991 |
| 155.66.0.0/16 | 65.5k | RIPE NCC | CH | 26th Mar 1992 |
| 157.97.148.0/22 | 1k | RIPE NCC | CH | 13th Jul 1995 |
| 158.133.0.0/16 | 65.5k | RIPE NCC | CH | 6th Mar 1992 |
| 158.216.0.0/16 | 65.5k | RIPE NCC | CH | 1st Sept 1993 |
| 159.156.0.0/16 | 65.5k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.0.0/19 | 8.2k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.102.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.104.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.108.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.112.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.148.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.152.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.172.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.176.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.192.0/20 | 4.1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.208.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.40.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.48.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.64.0/20 | 4.1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.80.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.213.88.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 160.59.0.0/16 | 65.5k | RIPE NCC | CH | 16th Jul 1992 |
| 161.20.0.0/16 | 65.5k | RIPE NCC | CH | 28th Apr 1992 |
| 162.26.0.0/16 | 65.5k | RIPE NCC | CH | 13th Jul 1992 |
| 163.168.0.0/16 | 65.5k | RIPE NCC | CH | 7th Sept 1992 |
| 166.12.0.0/14 | 262k | RIPE NCC | CH | 1st Sept 1993 |