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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,244 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.76.56.0/23 | 512 | RIPE NCC |  DE | 30th Aug 1994 |
| 194.76.96.0/22 | 1k | RIPE NCC | DE | 1st Sept 1994 |
| 194.77.133.0/24 | 256 | RIPE NCC | DE | 16th Oct 1995 |
| 194.77.154.0/24 | 256 | RIPE NCC |  FI | 22nd Nov 2019 |
| 194.77.218.0/24 | 256 | RIPE NCC | DE | 16th Oct 1995 |
| 194.77.54.0/23 | 512 | RIPE NCC | DE | 16th Oct 1995 |
| 194.77.64.0/24 | 256 | RIPE NCC |  US | 16th Oct 1995 |
| 194.77.86.0/23 | 512 | RIPE NCC | DE | 16th Oct 1995 |
| 194.79.224.0/20 | 4.1k | RIPE NCC |  NL | 11th Jan 1996 |
| 194.79.248.0/23 | 512 | RIPE NCC | DE | 5th Mar 1997 |
| 194.79.252.0/23 | 512 | RIPE NCC |  LU | 15th Jul 1998 |
| 194.79.48.0/22 | 1k | RIPE NCC |  GB | 23rd May 2018 |
| 194.79.60.0/22 | 1k | RIPE NCC |  AE | 25th Oct 2005 |
| 194.8.0.0/24 | 256 | RIPE NCC | DE | 31st Jul 1997 |
| 194.8.132.0/24 | 256 | RIPE NCC |  BE | 16th Aug 2021 |
| 194.8.248.0/23 | 512 | RIPE NCC |  UA | 20th Apr 2010 |
| 194.8.44.0/24 | 256 | RIPE NCC |  LV | 10th Nov 1993 |
| 194.8.49.0/24 | 256 | RIPE NCC | US | 14th Oct 2003 |
| 194.8.54.0/24 | 256 | RIPE NCC | GB | 15th Oct 2003 |
| 194.8.66.0/23 | 512 | RIPE NCC | DE | 5th Feb 2008 |
| 194.8.78.0/23 | 512 | RIPE NCC |  CH | 5th Feb 2008 |
| 194.8.9.0/24 | 256 | RIPE NCC | LV | 10th Nov 1993 |
| 194.8.92.0/23 | 512 | RIPE NCC | NL | 12th Feb 2008 |
| 194.85.0.0/24 | 256 | RIPE NCC |  RU | 19th Aug 1994 |
| 194.85.100.0/23 | 512 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.116.0/24 | 256 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.12.0/23 | 512 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.176.0/24 | 256 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.177.0/24 | 256 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.185.0/24 | 256 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.186.0/23 | 512 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.188.0/24 | 256 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.189.0/24 | 256 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.190.0/23 | 512 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.240.0/21 | 2k | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.3.0/24 | 256 | RIPE NCC | RU | 19th Aug 1994 |
| 194.85.72.0/22 | 1k | RIPE NCC | RU | 19th Aug 1994 |
| 194.88.0.0/24 | 256 | RIPE NCC | DE | 15th Nov 2004 |
| 194.88.136.0/23 | 512 | RIPE NCC |  IL | 19th Oct 2005 |
| 194.88.192.0/23 | 512 | RIPE NCC | CH | 23rd Aug 2005 |
| 194.88.2.0/24 | 256 | RIPE NCC | NL | 30th Sept 2010 |
| 194.88.228.0/23 | 512 | RIPE NCC |  BG | 5th Jul 2006 |
| 194.88.230.0/23 | 512 | RIPE NCC | NL | 6th Jul 2006 |
| 194.88.27.0/24 | 256 | RIPE NCC | DE | 5th Nov 1996 |
| 194.9.117.0/24 | 256 | RIPE NCC | DE | 28th Oct 1998 |
| 194.9.12.0/23 | 512 | RIPE NCC | CH | 28th Jul 2006 |
| 194.9.160.0/22 | 1k | RIPE NCC | DE | 14th Aug 1998 |
| 194.9.240.0/24 | 256 | RIPE NCC | US | 2nd Nov 1999 |
| 194.9.241.0/24 | 256 | RIPE NCC | US | 2nd Nov 1999 |
| 194.9.243.0/24 | 256 | RIPE NCC | US | 2nd Nov 1999 |