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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,778 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 91.199.15.0/24 | 256 | RIPE NCC |  BE | 9th Nov 2007 |
| 91.199.150.0/24 | 256 | RIPE NCC | BG | 29th Jan 2008 |
| 91.199.180.0/24 | 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 |
| 91.199.90.0/24 | 256 | RIPE NCC | ES | 7th Nov 2019 |
| 91.199.96.0/24 | 256 | RIPE NCC |  GR | 2nd Jan 2008 |