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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 194.26.168.0/22 | 1k | RIPE NCC |  NL | 24th Jul 2018 |
| 194.26.176.0/22 | 1k | RIPE NCC |  RO | 24th Jul 2018 |
| 194.26.194.0/24 | 256 | ARIN |  US | 13th Feb 2024 |
| 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 |  PL | 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 |
| 194.29.84.0/22 | 1k | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.88.0/21 | 2k | RIPE NCC | NL | 18th Oct 1999 |
| 194.29.96.0/24 | 256 | RIPE NCC | NL | 18th Oct 1999 |
| 194.30.166.0/24 | 256 | RIPE NCC | GB | 20th Apr 2005 |
| 194.30.167.0/24 | 256 | RIPE NCC | DE | 20th Apr 2005 |
| 194.30.168.0/24 | 256 | RIPE NCC |  EE | 12th Nov 2024 |
| 194.30.169.0/24 | 256 | RIPE NCC |  SE | 20th Apr 2005 |
| 194.30.171.0/24 | 256 | RIPE NCC | DK | 12th Jun 2023 |
| 194.30.172.0/24 | 256 | RIPE NCC | UA | 21st Apr 2005 |
| 194.30.175.0/24 | 256 | RIPE NCC | NL | 25th Apr 2005 |
| 194.30.187.0/24 | 256 | RIPE NCC |  CZ | 27th Apr 2005 |
| 194.30.188.0/24 | 256 | RIPE NCC | NL | 28th Apr 2005 |