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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.169.128.0/22 | 1k | RIPE NCC |  OM | 20th Sept 1996 |
| 194.169.140.0/22 | 1k | RIPE NCC |  GB | 20th Sept 1996 |
| 194.169.144.0/23 | 512 | RIPE NCC | GB | 20th Sept 1996 |
| 194.169.146.0/23 | 512 | RIPE NCC |  DE | 20th Sept 1996 |
| 194.169.148.0/23 | 512 | RIPE NCC | DE | 20th Sept 1996 |
| 194.169.16.0/20 | 4.1k | RIPE NCC | GB | 13th Jun 1995 |
| 194.169.192.0/24 | 256 | RIPE NCC |  RU | 29th Nov 2006 |
| 194.169.195.0/24 | 256 | RIPE NCC | GB | 30th Nov 2006 |
| 194.169.197.0/24 | 256 | RIPE NCC | DE | 8th Jan 2025 |
| 194.169.199.0/24 | 256 | RIPE NCC |  CH | 1st Dec 2006 |
| 194.169.201.0/24 | 256 | RIPE NCC |  ES | 3rd Dec 2006 |
| 194.169.205.0/24 | 256 | RIPE NCC |  UA | 4th Dec 2006 |
| 194.169.206.0/24 | 256 | RIPE NCC | UA | 4th Dec 2006 |
| 194.169.212.0/24 | 256 | RIPE NCC |  RO | 7th Apr 2008 |
| 194.169.217.0/24 | 256 | RIPE NCC | GB | 8th Dec 2006 |
| 194.169.234.0/24 | 256 | RIPE NCC | GB | 14th Dec 2006 |
| 194.169.243.0/24 | 256 | RIPE NCC |  SE | 19th Dec 2006 |
| 194.169.244.0/24 | 256 | RIPE NCC | DE | 9th Mar 2020 |
| 194.169.64.0/20 | 4.1k | RIPE NCC | GB | 4th Jun 1995 |
| 194.176.101.0/24 | 256 | RIPE NCC |  PL | 20th Jul 2006 |
| 194.176.102.0/24 | 256 | RIPE NCC | PL | 20th Jul 2006 |
| 194.176.103.0/24 | 256 | RIPE NCC |  FI | 8th Jun 2007 |
| 194.176.115.0/24 | 256 | RIPE NCC | RO | 26th Jul 2006 |
| 194.176.120.0/24 | 256 | RIPE NCC | DE | 30th Mar 2010 |
| 194.176.128.0/19 | 8.2k | RIPE NCC | GB | 4th Jun 1999 |
| 194.176.160.0/23 | 512 | RIPE NCC | RO | 9th May 2000 |
| 194.176.163.0/24 | 256 | RIPE NCC | RO | 9th May 2000 |
| 194.176.174.0/23 | 512 | RIPE NCC | RO | 9th May 2000 |
| 194.176.177.0/24 | 256 | RIPE NCC | RO | 9th May 2000 |
| 194.176.178.0/23 | 512 | RIPE NCC | RO | 9th May 2000 |
| 194.176.180.0/22 | 1k | RIPE NCC | RO | 9th May 2000 |
| 194.176.187.0/24 | 256 | RIPE NCC | RO | 9th May 2000 |
| 194.176.188.0/23 | 512 | RIPE NCC | RO | 9th May 2000 |
| 194.177.12.0/24 | 256 | RIPE NCC |  AT | 6th Feb 2024 |
| 194.177.15.0/24 | 256 | RIPE NCC | UA | 12th Feb 2024 |
| 194.179.144.0/23 | 512 | RIPE NCC |  SI | 26th Jun 1996 |
| 194.179.146.0/23 | 512 | ARIN |  US | 9th Dec 2024 |
| 194.179.148.0/23 | 512 | RIPE NCC | SI | 26th Jun 1996 |
| 194.179.150.0/23 | 512 | RIPE NCC |  IT | 26th Jun 1996 |
| 194.180.104.0/22 | 1k | RIPE NCC |  NL | 31st May 2018 |
| 194.180.13.0/24 | 256 | RIPE NCC | DE | 3rd Jul 1995 |
| 194.180.151.0/24 | 256 | RIPE NCC | DE | 10th Aug 1995 |
| 194.180.156.0/24 | 256 | RIPE NCC | DE | 14th Aug 1995 |
| 194.180.168.0/24 | 256 | RIPE NCC | DE | 10th Aug 1995 |
| 194.180.17.0/24 | 256 | RIPE NCC | DE | 5th Jul 1995 |
| 194.180.172.0/24 | 256 | RIPE NCC | DE | 23rd Aug 1995 |
| 194.180.192.0/23 | 512 | RIPE NCC | DE | 1st Sept 1995 |
| 194.180.195.0/24 | 256 | RIPE NCC | DE | 1st Sept 1995 |
| 194.180.198.0/24 | 256 | RIPE NCC | DE | 8th Sept 1995 |
| 194.180.202.0/23 | 512 | RIPE NCC | DE | 18th Sept 1995 |