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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,075 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 178.212.48.0/22 | 1k | RIPE NCC |  PL | 22nd Jul 2010 |
| 178.212.52.0/23 | 512 | RIPE NCC | PL | 22nd Jul 2010 |
| 178.212.54.0/24 | 256 | RIPE NCC | PL | 22nd Jul 2010 |
| 178.212.77.0/24 | 256 | RIPE NCC |  HR | 6th Sept 2021 |
| 178.212.88.0/24 | 256 | RIPE NCC |  NL | 28th Jul 2010 |
| 178.213.12.0/22 | 1k | RIPE NCC |  RU | 10th Sept 2010 |
| 178.213.248.0/21 | 2k | RIPE NCC | RU | 22nd Oct 2010 |
| 178.213.74.0/24 | 256 | RIPE NCC |  DE | 24th Sept 2010 |
| 178.214.128.0/19 | 8.2k | RIPE NCC | PL | 5th Oct 2010 |
| 178.215.128.0/20 | 4.1k | RIPE NCC |  GB | 15th Jul 2010 |
| 178.215.224.0/24 | 256 | RIPE NCC |  BG | 4th Sept 2018 |
| 178.216.128.0/21 | 2k | RIPE NCC |  UZ | 20th Apr 2010 |
| 178.216.192.0/21 | 2k | RIPE NCC |  SE | 25th Oct 2010 |
| 178.216.240.0/22 | 1k | RIPE NCC | NL | 29th May 2019 |
| 178.216.244.0/24 | 256 | RIPE NCC | GB | 8th Jul 2020 |
| 178.216.252.0/22 | 1k | RIPE NCC |  IR | 10th May 2010 |
| 178.216.32.0/21 | 2k | RIPE NCC |  GE | 24th Mar 2010 |
| 178.216.40.0/21 | 2k | RIPE NCC | PL | 24th Mar 2010 |
| 178.216.8.0/23 | 512 | RIPE NCC |  UA | 19th Mar 2010 |
| 178.217.103.0/24 | 256 | RIPE NCC | RU | 26th May 2010 |
| 178.217.232.0/24 | 256 | RIPE NCC | DE | 10th Jul 2020 |
| 178.217.235.0/24 | 256 | RIPE NCC |  IT | 10th Jul 2020 |
| 178.217.236.0/22 | 1k | RIPE NCC |  TR | 4th Jul 2018 |
| 178.217.96.0/23 | 512 | RIPE NCC | RU | 26th May 2010 |
| 178.218.248.0/22 | 1k | RIPE NCC | SE | 5th Sept 2018 |
| 178.219.32.0/22 | 1k | RIPE NCC |  SC | 14th May 2010 |
| 178.23.136.0/21 | 2k | RIPE NCC | UA | 23rd Apr 2010 |
| 178.23.190.0/24 | 256 | RIPE NCC |  MD | 3rd Sept 2021 |
| 178.23.48.0/21 | 2k | RIPE NCC | DE | 20th Apr 2010 |
| 178.236.20.0/23 | 512 | RIPE NCC | RU | 26th May 2010 |
| 178.236.28.0/24 | 256 | RIPE NCC | RU | 26th May 2010 |
| 178.236.30.0/23 | 512 | RIPE NCC | RU | 26th May 2010 |
| 178.239.39.0/24 | 256 | RIPE NCC | DE | 2nd Aug 2010 |
| 178.239.48.0/20 | 4.1k | RIPE NCC | SE | 3rd Aug 2010 |
| 178.248.168.0/21 | 2k | RIPE NCC | NL | 10th May 2010 |
| 178.248.184.0/21 | 2k | RIPE NCC |  FR | 11th May 2010 |
| 178.249.104.0/21 | 2k | RIPE NCC |  US | 25th May 2010 |
| 178.249.112.0/21 | 2k | RIPE NCC |  MK | 25th May 2010 |
| 178.249.40.0/21 | 2k | RIPE NCC | GB | 19th May 2010 |
| 178.250.24.0/21 | 2k | RIPE NCC |  CH | 31st May 2010 |
| 178.250.72.0/21 | 2k | RIPE NCC | GB | 2nd Jun 2010 |
| 178.252.0.0/18 | 16.4k | RIPE NCC | PL | 19th May 2010 |
| 178.255.223.0/24 | 256 | RIPE NCC | NL | 7th Sept 2021 |
| 178.36.0.0/15 | 131k | RIPE NCC | PL | 28th Jan 2010 |
| 178.72.24.0/21 | 2k | RIPE NCC | SE | 10th Feb 2010 |
| 178.73.128.0/18 | 16.4k | RIPE NCC | FR | 22nd Mar 2010 |
| 178.76.16.0/20 | 4.1k | RIPE NCC |  AZ | 31st Mar 2010 |
| 178.76.32.0/19 | 8.2k | RIPE NCC | AZ | 31st Mar 2010 |
| 178.76.8.0/21 | 2k | RIPE NCC | AZ | 31st Mar 2010 |
| 178.77.124.0/24 | 256 | RIPE NCC | DE | 15th Apr 2010 |