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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,755 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 91.223.30.0/24 | 256 | RIPE NCC |  UA | 21st Jan 2011 |
| 91.223.34.0/24 | 256 | RIPE NCC | UA | 15th Jul 2024 |
| 91.223.36.0/24 | 256 | RIPE NCC |  NO | 21st Jan 2011 |
| 91.223.45.0/24 | 256 | RIPE NCC |  RO | 25th Jan 2011 |
| 91.223.6.0/24 | 256 | RIPE NCC |  PL | 13th Jan 2011 |
| 91.223.81.0/24 | 256 | RIPE NCC | PL | 3rd Feb 2011 |
| 91.223.85.0/24 | 256 | RIPE NCC |  DK | 4th Feb 2011 |
| 91.224.114.0/23 | 512 | RIPE NCC |  IE | 5th Nov 2019 |
| 91.224.132.0/23 | 512 | RIPE NCC |  RU | 14th Feb 2011 |
| 91.224.22.0/24 | 256 | RIPE NCC |  AE | 25th Jan 2011 |
| 91.224.244.0/23 | 512 | RIPE NCC |  SE | 17th Mar 2011 |
| 91.224.34.0/23 | 512 | RIPE NCC | RU | 26th Jan 2011 |
| 91.224.38.0/23 | 512 | RIPE NCC | PL | 27th Jan 2011 |
| 91.224.42.0/23 | 512 | RIPE NCC |  SK | 27th Jan 2011 |
| 91.224.54.0/23 | 512 | RIPE NCC |  NL | 2nd Feb 2011 |
| 91.224.62.0/23 | 512 | RIPE NCC |  GE | 2nd Feb 2011 |
| 91.224.78.0/23 | 512 | RIPE NCC |  CY | 7th Feb 2011 |
| 91.225.0.0/24 | 256 | RIPE NCC |  AT | 2nd Dec 2020 |
| 91.225.116.0/22 | 1k | RIPE NCC | UA | 9th Feb 2011 |
| 91.225.126.0/24 | 256 | RIPE NCC |  GB | 9th Feb 2011 |
| 91.225.127.0/24 | 256 | RIPE NCC | RU | 9th Feb 2011 |
| 91.225.16.0/22 | 1k | RIPE NCC | GB | 26th Jan 2011 |
| 91.225.217.0/24 | 256 | RIPE NCC |  MD | 22nd Feb 2011 |
| 91.225.218.0/23 | 512 | RIPE NCC | MD | 22nd Feb 2011 |
| 91.225.248.0/22 | 1k | RIPE NCC |  US | 24th Feb 2011 |
| 91.225.32.0/23 | 512 | ARIN | US | 16th Mar 2017 |
| 91.226.100.0/22 | 1k | RIPE NCC | GB | 19th Apr 2011 |
| 91.226.12.0/23 | 512 | RIPE NCC |  AM | 5th Apr 2011 |
| 91.226.187.0/24 | 256 | RIPE NCC | UA | 26th Apr 2011 |
| 91.226.190.0/23 | 512 | RIPE NCC | UA | 26th Apr 2011 |
| 91.226.192.0/24 | 256 | RIPE NCC | UA | 26th Apr 2011 |
| 91.226.206.0/24 | 256 | RIPE NCC | GB | 8th Aug 2011 |
| 91.226.224.0/23 | 512 | RIPE NCC |  IR | 28th Apr 2011 |
| 91.226.226.0/24 | 256 | RIPE NCC |  DE | 18th Oct 2021 |
| 91.226.46.0/23 | 512 | RIPE NCC | DE | 12th Apr 2011 |
| 91.226.76.0/24 | 256 | RIPE NCC |  IL | 11th Nov 2019 |
| 91.227.101.0/24 | 256 | RIPE NCC |  LV | 10th May 2011 |
| 91.227.115.0/24 | 256 | RIPE NCC | PL | 2nd Apr 2012 |
| 91.227.14.0/23 | 512 | RIPE NCC |  UZ | 2nd May 2011 |
| 91.227.149.0/24 | 256 | RIPE NCC | RU | 16th May 2011 |
| 91.227.179.0/24 | 256 | RIPE NCC | NL | 17th May 2011 |
| 91.227.194.0/24 | 256 | RIPE NCC |  FR | 17th May 2011 |
| 91.227.198.0/24 | 256 | RIPE NCC | RU | 17th May 2011 |
| 91.227.209.0/24 | 256 | RIPE NCC |  BE | 18th May 2011 |
| 91.227.228.0/24 | 256 | RIPE NCC | RU | 18th May 2011 |
| 91.227.229.0/24 | 256 | RIPE NCC | NL | 18th May 2011 |
| 91.227.240.0/24 | 256 | RIPE NCC | DE | 18th May 2011 |
| 91.227.241.0/24 | 256 | RIPE NCC | AT | 18th May 2011 |
| 91.227.26.0/24 | 256 | RIPE NCC | GB | 3rd May 2011 |
| 91.227.79.0/25 | 128 | RIPE NCC | RU | 9th May 2011 |