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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,269 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 91.196.16.0/22 | 1k | RIPE NCC |  IT | 18th Apr 2018 |
| 91.196.60.0/22 | 1k | RIPE NCC |  RU | 14th Oct 2009 |
| 91.196.88.0/22 | 1k | RIPE NCC |  UA | 1st Jun 2007 |
| 91.197.12.0/22 | 1k | RIPE NCC |  CY | 12th Jul 2007 |
| 91.197.183.0/24 | 256 | RIPE NCC | RU | 10th Sept 2007 |
| 91.197.236.0/22 | 1k | RIPE NCC | RU | 18th Sept 2007 |
| 91.197.244.0/23 | 512 | RIPE NCC |  RO | 19th Sept 2007 |
| 91.197.246.0/24 | 256 | RIPE NCC | RO | 19th Sept 2007 |
| 91.197.36.0/22 | 1k | RIPE NCC | RO | 18th Apr 2018 |
| 91.197.44.0/23 | 512 | RIPE NCC |  CZ | 23rd May 2012 |
| 91.198.111.0/24 | 256 | RIPE NCC |  PL | 13th Sept 2007 |
| 91.198.124.0/24 | 256 | RIPE NCC |  TR | 18th Sept 2007 |
| 91.198.127.0/24 | 256 | RIPE NCC | RU | 31st Mar 2010 |
| 91.198.128.0/24 | 256 | RIPE NCC |  AT | 26th May 2025 |
| 91.198.13.0/24 | 256 | RIPE NCC |  GB | 22nd Jun 2007 |
| 91.198.136.0/24 | 256 | RIPE NCC |  DE | 20th Sept 2007 |
| 91.198.140.0/24 | 256 | RIPE NCC | UA | 20th Sept 2007 |
| 91.198.151.0/24 | 256 | RIPE NCC |  NL | 25th Sept 2007 |
| 91.198.152.0/24 | 256 | RIPE NCC | NL | 25th Sept 2007 |
| 91.198.165.0/24 | 256 | RIPE NCC | DE | 1st Oct 2007 |
| 91.198.174.0/24 | 256 | RIPE NCC |  US | 2nd Oct 2007 |
| 91.198.176.0/24 | 256 | RIPE NCC |  NO | 2nd Oct 2007 |
| 91.198.18.0/24 | 256 | RIPE NCC |  AE | 18th Jun 2026 |
| 91.198.181.0/24 | 256 | RIPE NCC |  BG | 16th Jun 2009 |
| 91.198.188.0/24 | 256 | RIPE NCC |  IL | 8th Jul 2020 |
| 91.198.189.0/24 | 256 | RIPE NCC | DE | 14th Sept 2011 |
| 91.198.192.0/24 | 256 | RIPE NCC | DE | 7th Nov 2019 |
| 91.198.212.0/24 | 256 | RIPE NCC | RU | 18th Oct 2007 |
| 91.198.22.0/24 | 256 | RIPE NCC |  SE | 26th Jun 2007 |
| 91.198.222.0/24 | 256 | RIPE NCC | PL | 25th Oct 2007 |
| 91.198.223.0/24 | 256 | RIPE NCC | SE | 25th Oct 2007 |
| 91.198.226.0/24 | 256 | RIPE NCC | PL | 26th Oct 2007 |
| 91.198.235.0/24 | 256 | RIPE NCC | UA | 29th Oct 2007 |
| 91.198.253.0/24 | 256 | RIPE NCC | DE | 6th Nov 2007 |
| 91.198.5.0/24 | 256 | RIPE NCC | IL | 19th Jun 2007 |
| 91.198.6.0/24 | 256 | RIPE NCC |  CH | 20th Jun 2007 |
| 91.198.62.0/24 | 256 | RIPE NCC |  SA | 28th Aug 2007 |
| 91.198.69.0/24 | 256 | RIPE NCC | RU | 29th Aug 2007 |
| 91.198.7.0/24 | 256 | RIPE NCC |  HU | 20th Jun 2007 |
| 91.198.75.0/24 | 256 | RIPE NCC | RU | 30th Aug 2007 |
| 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 |
| 91.199.102.0/24 | 256 | RIPE NCC |  ES | 7th Nov 2019 |
| 91.199.106.0/24 | 256 | RIPE NCC | PL | 10th Jan 2008 |
| 91.199.108.0/24 | 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 |