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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
24,896 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 46.226.248.0/21 | 2k | RIPE NCC |  GB | 26th Jan 2011 |
| 46.226.48.0/21 | 2k | RIPE NCC | GB | 20th Jan 2011 |
| 46.227.72.0/21 | 2k | RIPE NCC |  SE | 28th Jan 2011 |
| 46.227.8.0/21 | 2k | RIPE NCC |  CZ | 26th Jan 2011 |
| 46.228.144.0/20 | 4.1k | RIPE NCC |  US | 7th Feb 2011 |
| 46.228.224.0/20 | 4.1k | RIPE NCC |  PL | 9th Feb 2011 |
| 46.228.64.0/20 | 4.1k | RIPE NCC |  RU | 4th Feb 2011 |
| 46.23.16.0/20 | 4.1k | RIPE NCC |  DE | 1st Dec 2010 |
| 46.230.160.0/21 | 2k | RIPE NCC |  NO | 8th Feb 2011 |
| 46.230.176.0/20 | 4.1k | RIPE NCC | SE | 8th Feb 2011 |
| 46.230.192.0/18 | 16.4k | RIPE NCC | SE | 8th Feb 2011 |
| 46.231.104.0/21 | 2k | RIPE NCC |  NL | 7th Feb 2011 |
| 46.231.128.0/21 | 2k | RIPE NCC |  FR | 7th Feb 2011 |
| 46.231.136.0/21 | 2k | RIPE NCC | DE | 7th Feb 2011 |
| 46.235.5.0/24 | 256 | RIPE NCC | GB | 8th Feb 2011 |
| 46.237.128.0/18 | 16.4k | RIPE NCC | GB | 26th Jan 2011 |
| 46.243.209.0/24 | 256 | RIPE NCC | RU | 28th Dec 2010 |
| 46.243.212.0/24 | 256 | RIPE NCC | RU | 28th Dec 2010 |
| 46.243.218.0/23 | 512 | RIPE NCC | RU | 28th Dec 2010 |
| 46.243.255.0/24 | 256 | RIPE NCC | NL | 28th Dec 2010 |
| 46.243.56.0/22 | 1k | RIPE NCC | DE | 15th Jun 2018 |
| 46.245.138.0/24 | 256 | RIPE NCC |  GR | 2nd Feb 2011 |
| 46.245.235.0/24 | 256 | RIPE NCC |  IT | 19th Aug 2024 |
| 46.245.236.0/24 | 256 | RIPE NCC |  HR | 19th Aug 2024 |
| 46.247.44.0/22 | 1k | RIPE NCC | GB | 1st Feb 2011 |
| 46.247.48.0/21 | 2k | RIPE NCC | GB | 1st Feb 2011 |
| 46.247.56.0/23 | 512 | RIPE NCC | GB | 1st Feb 2011 |
| 46.247.62.0/23 | 512 | RIPE NCC | GB | 1st Feb 2011 |
| 46.248.32.0/19 | 8.2k | RIPE NCC |  IR | 17th Dec 2010 |
| 46.249.112.0/21 | 2k | RIPE NCC |  AU | 30th Dec 2010 |
| 46.250.132.0/22 | 1k | RIPE NCC | RU | 28th Jan 2011 |
| 46.250.136.0/22 | 1k | RIPE NCC | RU | 28th Jan 2011 |
| 46.250.144.0/22 | 1k | RIPE NCC | RU | 28th Jan 2011 |
| 46.250.148.0/22 | 1k | RIPE NCC | RU | 28th Jan 2011 |
| 46.250.152.0/22 | 1k | RIPE NCC | RU | 28th Jan 2011 |
| 46.251.224.0/24 | 256 | RIPE NCC | IR | 9th Feb 2011 |
| 46.251.226.0/24 | 256 | RIPE NCC | IR | 9th Feb 2011 |
| 46.251.237.0/24 | 256 | RIPE NCC | IR | 9th Feb 2011 |
| 46.251.239.0/24 | 256 | RIPE NCC |  AT | 9th Feb 2011 |
| 46.251.64.0/19 | 8.2k | RIPE NCC | RU | 3rd Feb 2011 |
| 46.253.137.0/24 | 256 | RIPE NCC | NL | 22nd Sept 2021 |
| 46.253.144.0/20 | 4.1k | RIPE NCC | DE | 14th Jan 2011 |
| 46.254.168.0/21 | 2k | RIPE NCC | NL | 21st Dec 2010 |
| 46.254.92.0/23 | 512 | RIPE NCC | RU | 20th Dec 2010 |
| 46.255.0.0/21 | 2k | RIPE NCC | GB | 23rd Dec 2010 |
| 46.255.56.0/21 | 2k | RIPE NCC |  OM | 23rd Dec 2010 |
| 46.28.200.0/21 | 2k | RIPE NCC |  CH | 5th Aug 2011 |
| 46.28.48.0/21 | 2k | RIPE NCC | GB | 20th Jul 2010 |
| 46.29.104.0/21 | 2k | RIPE NCC | IT | 10th Aug 2010 |
| 46.29.128.0/21 | 2k | RIPE NCC |  UA | 11th Aug 2010 |