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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,269 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 80.81.192.0/20 | 4.1k | RIPE NCC |  DE | 24th Jul 2001 |
| 80.82.192.0/21 | 2k | RIPE NCC |  CZ | 7th Jun 2012 |
| 80.84.0.0/20 | 4.1k | RIPE NCC | DE | 6th Aug 2001 |
| 80.85.242.0/23 | 512 | RIPE NCC |  RU | 12th Feb 2010 |
| 80.85.48.0/21 | 2k | RIPE NCC |  HU | 26th Apr 2005 |
| 80.85.88.0/21 | 2k | RIPE NCC |  NL | 19th May 2003 |
| 80.87.0.0/20 | 4.1k | RIPE NCC |  GB | 21st Aug 2001 |
| 80.90.66.0/23 | 512 | RIPE NCC | RU | 6th Sept 2001 |
| 80.90.68.0/22 | 1k | RIPE NCC | RU | 6th Sept 2001 |
| 80.90.72.0/21 | 2k | RIPE NCC | RU | 6th Sept 2001 |
| 80.91.144.0/20 | 4.1k | RIPE NCC |  BE | 14th Jun 2005 |
| 80.91.213.0/24 | 256 | RIPE NCC |  CY | 25th Jan 2022 |
| 80.91.217.0/24 | 256 | RIPE NCC | DE | 25th Jan 2022 |
| 80.92.144.0/20 | 4.1k | RIPE NCC | GB | 27th Jun 2005 |
| 80.92.160.0/20 | 4.1k | RIPE NCC | RU | 24th Sept 2001 |
| 80.92.204.0/23 | 512 | RIPE NCC |  MD | 24th Sept 2001 |
| 80.92.206.0/24 | 256 | RIPE NCC | MD | 24th Sept 2001 |
| 81.127.192.0/18 | 16.4k | RIPE NCC |  IT | 8th Jul 2002 |
| 81.16.128.0/22 | 1k | RIPE NCC |  RO | 16th Aug 2018 |
| 81.16.136.0/22 | 1k | RIPE NCC |  AT | 16th Aug 2018 |
| 81.16.180.0/22 | 1k | RIPE NCC | DE | 28th Feb 2005 |
| 81.160.0.0/17 | 32.8k | RIPE NCC | DE | 12th Nov 2003 |
| 81.162.128.0/18 | 16.4k | RIPE NCC |  TR | 6th Dec 2011 |
| 81.163.64.0/21 | 2k | RIPE NCC | RU | 25th Aug 2011 |
| 81.163.88.0/21 | 2k | RIPE NCC | RU | 30th Aug 2011 |
| 81.17.124.0/22 | 1k | RIPE NCC | DE | 4th Aug 2003 |
| 81.17.160.0/20 | 4.1k | RIPE NCC |  KZ | 18th Nov 2008 |
| 81.172.0.0/19 | 8.2k | RIPE NCC |  US | 14th Jan 2003 |
| 81.172.116.0/24 | 256 | RIPE NCC | US | 14th Jan 2003 |
| 81.172.45.0/24 | 256 | RIPE NCC | DE | 14th Jan 2003 |
| 81.172.48.0/21 | 2k | RIPE NCC | US | 14th Jan 2003 |
| 81.172.56.0/22 | 1k | RIPE NCC | US | 14th Jan 2003 |
| 81.172.66.0/24 | 256 | RIPE NCC | US | 14th Jan 2003 |
| 81.172.67.0/24 | 256 | RIPE NCC | DE | 14th Jan 2003 |
| 81.173.116.0/22 | 1k | RIPE NCC | GB | 19th Feb 2003 |
| 81.173.120.0/22 | 1k | RIPE NCC | GB | 19th Feb 2003 |
| 81.173.5.0/24 | 256 | RIPE NCC | NL | 19th Feb 2003 |
| 81.20.0.0/20 | 4.1k | RIPE NCC | GB | 19th May 2009 |
| 81.201.64.0/20 | 4.1k | RIPE NCC | RU | 10th Oct 2002 |
| 81.208.144.0/20 | 4.1k | RIPE NCC |  SE | 8th Oct 2002 |
| 81.21.208.0/20 | 4.1k | RIPE NCC | SE | 18th Jan 2006 |
| 81.21.64.0/20 | 4.1k | RIPE NCC | DE | 15th Feb 2002 |
| 81.22.112.0/20 | 4.1k | RIPE NCC |  SA | 23rd Jan 2006 |
| 81.22.194.0/23 | 512 | RIPE NCC | RU | 25th Feb 2002 |
| 81.22.228.0/22 | 1k | RIPE NCC | HU | 11th Sept 2018 |
| 81.22.236.0/22 | 1k | RIPE NCC | CZ | 11th Sept 2018 |
| 81.23.128.0/20 | 4.1k | RIPE NCC |  DK | 13th Aug 2010 |
| 81.24.176.0/20 | 4.1k | RIPE NCC | RU | 14th Oct 2010 |
| 81.27.0.0/20 | 4.1k | RIPE NCC | SE | 8th Apr 2002 |
| 81.27.224.0/22 | 1k | RIPE NCC | DE | 15th Apr 2002 |