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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.99.227.0/24 | 256 | RIPE NCC |  DE | 15th Feb 1994 |
| 193.99.83.0/24 | 256 | RIPE NCC | DE | 15th Feb 1994 |
| 194.0.10.0/24 | 256 | RIPE NCC |  AT | 11th Jun 2009 |
| 194.0.121.0/24 | 256 | RIPE NCC |  RU | 30th Oct 2006 |
| 194.0.132.0/24 | 256 | RIPE NCC | AT | 30th Dec 2024 |
| 194.0.139.0/24 | 256 | RIPE NCC |  IT | 20th Nov 2019 |
| 194.0.141.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.15.0/24 | 256 | RIPE NCC |  SA | 4th Feb 2010 |
| 194.0.150.0/24 | 256 | RIPE NCC |  UA | 3rd Jan 2007 |
| 194.0.152.0/24 | 256 | RIPE NCC |  FR | 3rd Jan 2007 |
| 194.0.156.0/24 | 256 | RIPE NCC |  IE | 4th Jan 2007 |
| 194.0.159.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.168.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.170.0/24 | 256 | RIPE NCC | DE | 20th Nov 2019 |
| 194.0.172.0/24 | 256 | RIPE NCC |  CH | 12th Jan 2007 |
| 194.0.178.0/24 | 256 | RIPE NCC | DE | 20th Nov 2019 |
| 194.0.180.0/24 | 256 | RIPE NCC | DE | 20th Nov 2019 |
| 194.0.183.0/24 | 256 | RIPE NCC | DE | 25th Jan 2007 |
| 194.0.186.0/24 | 256 | RIPE NCC | DE | 20th Nov 2019 |
| 194.0.193.0/24 | 256 | RIPE NCC |  TR | 20th Nov 2019 |
| 194.0.196.0/24 | 256 | RIPE NCC | IE | 31st Jan 2007 |
| 194.0.197.0/24 | 256 | RIPE NCC |  NL | 16th Feb 2007 |
| 194.0.198.0/24 | 256 | RIPE NCC | CH | 1st Feb 2007 |
| 194.0.211.0/24 | 256 | RIPE NCC |  PL | 6th Feb 2007 |
| 194.0.234.0/24 | 256 | RIPE NCC |  IR | 14th May 2024 |
| 194.0.241.0/24 | 256 | RIPE NCC | FR | 6th Mar 2007 |
| 194.0.243.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.247.0/24 | 256 | RIPE NCC | DE | 7th Mar 2007 |
| 194.0.248.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.0.249.0/24 | 256 | RIPE NCC | FR | 8th Mar 2007 |
| 194.0.250.0/24 | 256 | RIPE NCC | NL | 8th Mar 2007 |
| 194.0.30.0/24 | 256 | RIPE NCC | NL | 4th Jul 2011 |
| 194.0.31.0/24 | 256 | RIPE NCC | NL | 4th Jul 2011 |
| 194.0.35.0/24 | 256 | RIPE NCC |  ES | 1st Sept 2011 |
| 194.0.47.0/24 | 256 | RIPE NCC |  DK | 19th Apr 2012 |
| 194.0.56.0/23 | 512 | RIPE NCC | UA | 14th Sept 2012 |
| 194.0.7.0/24 | 256 | RIPE NCC |  BE | 24th Nov 2008 |
| 194.0.80.0/22 | 1k | RIPE NCC |  FI | 12th Oct 2006 |
| 194.1.132.0/22 | 1k | RIPE NCC |  KG | 27th Nov 1995 |
| 194.1.148.0/24 | 256 | RIPE NCC |  GB | 9th Feb 2007 |
| 194.1.160.0/24 | 256 | RIPE NCC | IT | 16th Feb 2007 |
| 194.1.162.0/24 | 256 | RIPE NCC | FR | 29th Sept 2025 |
| 194.1.177.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.1.179.0/24 | 256 | RIPE NCC | IT | 20th Nov 2019 |
| 194.1.190.0/24 | 256 | RIPE NCC | CH | 31st Mar 2010 |
| 194.1.191.0/24 | 256 | RIPE NCC |  SK | 2nd Sept 1998 |
| 194.1.204.0/24 | 256 | RIPE NCC | NL | 22nd Feb 2007 |
| 194.1.211.0/24 | 256 | RIPE NCC |  SE | 27th Feb 2007 |
| 194.1.219.0/24 | 256 | RIPE NCC | SE | 15th Jun 2026 |
| 194.102.109.0/24 | 256 | RIPE NCC |  RO | 8th Jul 1998 |