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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,702 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 91.198.80.0/24 | 256 | RIPE NCC |  PL | 31st Aug 2007 |
| 91.198.9.0/24 | 256 | RIPE NCC |  GB | 21st Jun 2007 |
| 91.198.91.0/24 | 256 | RIPE NCC |  LV | 30th Aug 2012 |
| 91.198.97.0/24 | 256 | RIPE NCC | PL | 6th Sept 2007 |
| 91.199.102.0/24 | 256 | RIPE NCC |  ES | 7th Nov 2019 |
| 91.199.106.0/24 | 256 | RIPE NCC | PL | 10th Jan 2008 |
| 91.199.107.0/24 | 256 | RIPE NCC |  SA | 10th Jan 2008 |
| 91.199.108.0/24 | 256 | RIPE NCC | ES | 7th Nov 2019 |
| 91.199.123.0/24 | 256 | RIPE NCC | ES | 7th Nov 2019 |
| 91.199.130.0/24 | 256 | RIPE NCC | GB | 23rd Jan 2008 |
| 91.199.135.0/24 | 256 | RIPE NCC |  NL | 24th Jan 2008 |
| 91.199.144.0/24 | 256 | RIPE NCC |  UA | 28th Jan 2008 |
| 91.199.15.0/24 | 256 | RIPE NCC |  BE | 9th Nov 2007 |
| 91.199.150.0/24 | 256 | RIPE NCC |  BG | 29th Jan 2008 |
| 91.199.152.0/24 | 256 | RIPE NCC |  FR | 28th Sept 2026 |
| 91.199.165.0/24 | 256 | RIPE NCC |  DE | 6th Feb 2008 |
| 91.199.180.0/24 | 256 | RIPE NCC | GB | 11th Feb 2008 |
| 91.199.186.0/24 | 256 | RIPE NCC |  CH | 11th Feb 2008 |
| 91.199.195.0/24 | 256 | RIPE NCC |  NO | 18th Feb 2008 |
| 91.199.20.0/24 | 256 | RIPE NCC |  KZ | 14th Nov 2007 |
| 91.199.207.0/24 | 256 | RIPE NCC |  CZ | 21st Feb 2008 |
| 91.199.222.0/24 | 256 | RIPE NCC | UA | 29th Feb 2008 |
| 91.199.232.0/24 | 256 | RIPE NCC |  RU | 26th Jun 2009 |
| 91.199.233.0/24 | 256 | RIPE NCC | FR | 5th Mar 2008 |
| 91.199.3.0/24 | 256 | RIPE NCC |  SC | 7th Nov 2019 |
| 91.199.35.0/24 | 256 | RIPE NCC | UA | 21st Nov 2007 |
| 91.199.36.0/24 | 256 | RIPE NCC |  IT | 21st Nov 2007 |
| 91.199.60.0/24 | 256 | RIPE NCC |  AT | 4th Dec 2007 |
| 91.199.68.0/24 | 256 | RIPE NCC |  SE | 10th Dec 2007 |
| 91.199.71.0/24 | 256 | RIPE NCC | GB | 13th Dec 2007 |
| 91.199.79.0/24 | 256 | RIPE NCC |  HR | 21st Dec 2007 |
| 91.199.90.0/24 | 256 | RIPE NCC | ES | 7th Nov 2019 |
| 91.199.91.0/24 | 256 | RIPE NCC | UA | 28th Dec 2007 |
| 91.199.92.0/24 | 256 | RIPE NCC | UA | 15th Feb 2010 |
| 91.199.96.0/24 | 256 | RIPE NCC |  GR | 2nd Jan 2008 |
| 91.200.145.0/24 | 256 | RIPE NCC |  LT | 11th Jan 2024 |
| 91.200.149.0/24 | 256 | RIPE NCC | RU | 19th Apr 2018 |
| 91.200.152.0/22 | 1k | RIPE NCC | SE | 16th Oct 2007 |
| 91.200.164.0/22 | 1k | RIPE NCC |  EE | 17th Oct 2007 |
| 91.200.179.0/24 | 256 | RIPE NCC | IT | 22nd May 2020 |
| 91.200.196.0/22 | 1k | RIPE NCC |  MT | 26th Oct 2007 |
| 91.200.228.0/22 | 1k | RIPE NCC | RU | 7th Nov 2007 |
| 91.200.63.0/24 | 256 | RIPE NCC |  CY | 25th Jul 2012 |
| 91.201.128.0/22 | 1k | RIPE NCC | DE | 12th Dec 2007 |
| 91.201.170.0/24 | 256 | RIPE NCC |  US | 14th Aug 2020 |
| 91.201.192.0/22 | 1k | RIPE NCC |  RO | 7th Jan 2008 |
| 91.201.212.0/23 | 512 | RIPE NCC | CH | 13th Aug 2012 |
| 91.201.238.0/24 | 256 | RIPE NCC | RU | 22nd Jan 2008 |
| 91.201.24.0/24 | 256 | RIPE NCC | RU | 16th Nov 2007 |
| 91.201.8.0/23 | 512 | RIPE NCC | RU | 13th Nov 2007 |