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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 91.211.16.0/22 | 1k | RIPE NCC |  RU | 26th Nov 2008 |
| 91.211.162.0/23 | 512 | RIPE NCC |  NL | 20th Apr 2018 |
| 91.211.2.0/24 | 256 | RIPE NCC | RU | 30th Jun 2020 |
| 91.211.72.0/22 | 1k | RIPE NCC | NL | 5th Dec 2008 |
| 91.211.76.0/22 | 1k | RIPE NCC | RU | 5th Dec 2008 |
| 91.212.100.0/24 | 256 | RIPE NCC |  SC | 8th Nov 2019 |
| 91.212.102.0/24 | 256 | RIPE NCC |  PS | 26th Mar 2009 |
| 91.212.108.0/24 | 256 | RIPE NCC |  GB | 31st Mar 2009 |
| 91.212.112.0/24 | 256 | RIPE NCC |  SK | 13th Feb 2012 |
| 91.212.114.0/24 | 256 | RIPE NCC |  IL | 3rd Apr 2009 |
| 91.212.122.0/24 | 256 | RIPE NCC | NL | 25th Jan 2022 |
| 91.212.123.0/24 | 256 | RIPE NCC | SC | 8th Nov 2019 |
| 91.212.127.0/24 | 256 | RIPE NCC |  FR | 12th Dec 2011 |
| 91.212.130.0/24 | 256 | RIPE NCC |  DE | 8th Apr 2009 |
| 91.212.131.0/24 | 256 | RIPE NCC | GB | 8th Apr 2009 |
| 91.212.133.0/24 | 256 | RIPE NCC |  KZ | 9th Apr 2009 |
| 91.212.135.0/24 | 256 | RIPE NCC |  PL | 8th Nov 2019 |
| 91.212.14.0/24 | 256 | RIPE NCC | NL | 27th Jan 2026 |
| 91.212.170.0/24 | 256 | RIPE NCC | PL | 27th Apr 2009 |
| 91.212.171.0/24 | 256 | RIPE NCC | RU | 27th Apr 2009 |
| 91.212.172.0/24 | 256 | RIPE NCC |  AT | 19th Sept 2022 |
| 91.212.18.0/24 | 256 | RIPE NCC | GB | 29th Jan 2009 |
| 91.212.180.0/24 | 256 | RIPE NCC |  UZ | 1st May 2009 |
| 91.212.200.0/24 | 256 | RIPE NCC |  CH | 12th May 2009 |
| 91.212.204.0/24 | 256 | RIPE NCC |  HR | 12th Jun 2024 |
| 91.212.207.0/24 | 256 | RIPE NCC |  SE | 13th May 2009 |
| 91.212.210.0/24 | 256 | RIPE NCC | GB | 15th May 2009 |
| 91.212.222.0/24 | 256 | RIPE NCC | NL | 27th May 2009 |
| 91.212.235.0/24 | 256 | RIPE NCC |  BG | 3rd Jun 2009 |
| 91.212.239.0/24 | 256 | RIPE NCC | RU | 4th Jun 2009 |
| 91.212.247.0/24 | 256 | RIPE NCC | HR | 5th Jun 2009 |
| 91.212.28.0/24 | 256 | RIPE NCC |  DK | 2nd Feb 2009 |
| 91.212.56.0/24 | 256 | RIPE NCC |  UA | 12th Feb 2009 |
| 91.212.57.0/24 | 256 | RIPE NCC | RU | 12th Feb 2009 |
| 91.212.58.0/24 | 256 | RIPE NCC | FR | 12th Feb 2009 |
| 91.212.59.0/24 | 256 | RIPE NCC |  PT | 16th Sept 2024 |
| 91.212.62.0/24 | 256 | RIPE NCC |  RO | 16th Feb 2009 |
| 91.212.7.0/24 | 256 | RIPE NCC | RU | 27th Jan 2009 |
| 91.212.74.0/24 | 256 | RIPE NCC | RO | 18th Feb 2009 |
| 91.212.88.0/24 | 256 | RIPE NCC |  AG | 10th Jun 2020 |
| 91.212.9.0/24 | 256 | RIPE NCC | PL | 27th Jan 2009 |
| 91.212.97.0/24 | 256 | RIPE NCC | RU | 25th Mar 2009 |
| 91.213.0.0/24 | 256 | RIPE NCC | SE | 9th Jun 2009 |
| 91.213.105.0/24 | 256 | RIPE NCC |  LV | 30th Jul 2009 |
| 91.213.111.0/24 | 256 | RIPE NCC | NL | 8th Nov 2019 |
| 91.213.118.0/24 | 256 | RIPE NCC |  TR | 21st Aug 2024 |
| 91.213.12.0/24 | 256 | RIPE NCC | BG | 16th Jun 2009 |
| 91.213.128.0/24 | 256 | RIPE NCC | CH | 6th Aug 2009 |
| 91.213.129.0/24 | 256 | RIPE NCC |  IT | 6th Aug 2009 |
| 91.213.134.0/24 | 256 | RIPE NCC |  US | 30th May 2025 |