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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,296 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.247.188.0/23 | 512 | RIPE NCC |  DK | 20th Nov 2009 |
| 194.247.26.0/23 | 512 | RIPE NCC |  FR | 8th Apr 2010 |
| 194.247.39.0/24 | 256 | RIPE NCC |  RS | 22nd Dec 2010 |
| 194.247.48.0/24 | 256 | RIPE NCC |  NO | 18th Jun 2012 |
| 194.247.56.0/24 | 256 | RIPE NCC |  IT | 27th Dec 2010 |
| 194.253.0.0/16 | 65.5k | RIPE NCC |  NL | 8th Mar 1996 |
| 194.26.0.0/24 | 256 | RIPE NCC |  UA | 8th May 2025 |
| 194.26.1.0/24 | 256 | RIPE NCC |  ES | 20th Nov 2019 |
| 194.26.130.0/24 | 256 | RIPE NCC |  DE | 29th Sept 2021 |
| 194.26.140.0/24 | 256 | RIPE NCC | FR | 29th Sept 2021 |
| 194.26.150.0/23 | 512 | RIPE NCC | FR | 21st Oct 2019 |
| 194.26.156.0/23 | 512 | RIPE NCC | NL | 28th Apr 1995 |
| 194.26.160.0/22 | 1k | RIPE NCC | NL | 13th Sept 1995 |
| 194.26.168.0/22 | 1k | RIPE NCC | NL | 24th Jul 2018 |
| 194.26.176.0/22 | 1k | RIPE NCC |  RO | 24th Jul 2018 |
| 194.26.197.0/24 | 256 | RIPE NCC |  SA | 28th Oct 2021 |
| 194.26.215.0/24 | 256 | RIPE NCC |  LT | 29th Oct 2021 |
| 194.26.218.0/24 | 256 | RIPE NCC |  MD | 29th Oct 2021 |
| 194.26.248.0/21 | 2k | RIPE NCC |  CH | 29th Sept 1995 |
| 194.26.27.0/24 | 256 | RIPE NCC |  RU | 20th Nov 2019 |
| 194.26.29.0/24 | 256 | RIPE NCC | RU | 20th Nov 2019 |
| 194.26.30.0/23 | 512 | RIPE NCC | DE | 21st Oct 2019 |
| 194.26.64.0/24 | 256 | RIPE NCC |  IR | 18th Aug 2025 |
| 194.26.65.0/24 | 256 | RIPE NCC |  HK | 18th Aug 2025 |
| 194.26.69.0/24 | 256 | RIPE NCC | RU | 20th Nov 2019 |
| 194.26.70.0/23 | 512 | RIPE NCC | DE | 21st Oct 2019 |
| 194.28.124.0/22 | 1k | RIPE NCC |  GB | 17th Nov 2010 |
| 194.28.131.0/24 | 256 | RIPE NCC | RS | 4th May 2010 |
| 194.28.132.0/22 | 1k | RIPE NCC | UA | 6th May 2010 |
| 194.28.16.0/22 | 1k | RIPE NCC | UA | 16th Apr 2010 |
| 194.28.244.0/22 | 1k | RIPE NCC | GB | 28th May 2010 |
| 194.28.252.0/22 | 1k | RIPE NCC | DK | 31st May 2010 |
| 194.28.44.0/24 | 256 | RIPE NCC | NL | 29th May 2019 |
| 194.29.102.0/23 | 512 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.104.0/21 | 2k | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.112.0/23 | 512 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.115.0/24 | 256 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.116.0/23 | 512 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.121.0/24 | 256 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.122.0/23 | 512 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.124.0/22 | 1k | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.185.0/24 | 256 | RIPE NCC |  HU | 31st Jan 2012 |
| 194.29.192.0/21 | 2k | RIPE NCC |  FI | 29th Feb 2000 |
| 194.29.48.0/22 | 1k | RIPE NCC |  GR | 22nd Aug 2002 |
| 194.29.53.0/24 | 256 | RIPE NCC | NL | 13th Jul 2021 |
| 194.29.66.0/24 | 256 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.72.0/24 | 256 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.76.0/23 | 512 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.81.0/24 | 256 | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.82.0/23 | 512 | RIPE NCC | NL | 18th Oct 1999 |