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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
24,906 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 46.254.168.0/21 | 2k | RIPE NCC | 21st Dec 2010 | |
| 46.254.92.0/23 | 512 | RIPE NCC | 20th Dec 2010 | |
| 46.255.0.0/21 | 2k | RIPE NCC | 23rd Dec 2010 | |
| 46.255.56.0/21 | 2k | RIPE NCC | 23rd Dec 2010 | |
| 46.28.200.0/21 | 2k | RIPE NCC | 5th Aug 2011 | |
| 46.28.48.0/21 | 2k | RIPE NCC | 20th Jul 2010 | |
| 46.29.104.0/21 | 2k | RIPE NCC | 10th Aug 2010 | |
| 46.29.128.0/21 | 2k | RIPE NCC | 11th Aug 2010 | |
| 46.29.33.0/24 | 256 | RIPE NCC | 15th Jan 2025 | |
| 46.29.36.0/24 | 256 | RIPE NCC | 16th Jan 2025 | |
| 46.29.37.0/24 | 256 | RIPE NCC | 16th Jan 2025 | |
| 46.29.39.0/24 | 256 | RIPE NCC | 16th Jan 2025 | |
| 46.29.56.0/21 | 2k | RIPE NCC | 6th Aug 2010 | |
| 46.29.88.0/21 | 2k | RIPE NCC | 9th Aug 2010 | |
| 46.30.184.0/22 | 1k | RIPE NCC | 14th Jun 2018 | |
| 46.30.192.0/21 | 2k | RIPE NCC | 7th Sept 2010 | |
| 46.30.217.0/24 | 256 | RIPE NCC | 8th Sept 2010 | |
| 46.30.218.0/24 | 256 | RIPE NCC | 8th Sept 2010 | |
| 46.30.222.0/23 | 512 | RIPE NCC | 8th Sept 2010 | |
| 46.36.112.0/24 | 256 | RIPE NCC | 26th Oct 2010 | |
| 46.36.113.0/24 | 256 | RIPE NCC | 26th Oct 2010 | |
| 46.36.114.0/23 | 512 | RIPE NCC | 26th Oct 2010 | |
| 46.36.116.0/23 | 512 | RIPE NCC | 26th Oct 2010 | |
| 46.36.118.0/23 | 512 | RIPE NCC | 26th Oct 2010 | |
| 46.36.192.0/21 | 2k | RIPE NCC | 2nd Nov 2010 | |
| 46.36.200.0/24 | 256 | RIPE NCC | 10th Jan 2024 | |
| 46.36.202.0/24 | 256 | RIPE NCC | 10th Jan 2024 | |
| 46.36.203.0/24 | 256 | RIPE NCC | 10th Jan 2024 | |
| 46.36.224.0/19 | 8.2k | RIPE NCC | 3rd Nov 2010 | |
| 46.43.128.0/18 | 16.4k | RIPE NCC | 17th Aug 2010 | |
| 46.58.0.0/17 | 32.8k | RIPE NCC | 14th Oct 2010 | |
| 5.1.120.0/21 | 2k | RIPE NCC | 26th Apr 2012 | |
| 5.10.232.0/21 | 2k | RIPE NCC | 2nd May 2012 | |
| 5.100.168.0/21 | 2k | RIPE NCC | 26th Jun 2012 | |
| 5.104.152.0/22 | 1k | RIPE NCC | 29th Jun 2012 | |
| 5.104.158.0/23 | 512 | RIPE NCC | 29th Jun 2012 | |
| 5.104.224.0/23 | 512 | RIPE NCC | 2nd Jul 2012 | |
| 5.104.226.0/24 | 256 | RIPE NCC | 2nd Jul 2012 | |
| 5.104.227.0/24 | 256 | RIPE NCC | 2nd Jul 2012 | |
| 5.104.228.0/24 | 256 | RIPE NCC | 2nd Jul 2012 | |
| 5.104.229.0/24 | 256 | RIPE NCC | 2nd Jul 2012 | |
| 5.104.230.0/23 | 512 | RIPE NCC | 2nd Jul 2012 | |
| 5.104.64.0/21 | 2k | RIPE NCC | 28th Jun 2012 | |
| 5.104.76.0/22 | 1k | RIPE NCC | 11th Jun 2018 | |
| 5.133.116.0/22 | 1k | RIPE NCC | 9th Nov 2018 | |
| 5.133.80.0/22 | 1k | RIPE NCC | 9th Nov 2018 | |
| 5.144.152.0/24 | 256 | RIPE NCC | 12th Jul 2012 | |
| 5.144.154.0/23 | 512 | RIPE NCC | 12th Jul 2012 | |
| 5.149.96.0/20 | 4.1k | RIPE NCC | 16th Jul 2012 | |
| 5.150.152.0/22 | 1k | RIPE NCC | 18th Jul 2012 |