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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
24,902 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 80.84.76.0/23 | 512 | RIPE NCC |  GB | 8th Aug 2001 |
| 80.84.78.0/23 | 512 | RIPE NCC | GB | 8th 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 |  SC | 25th Jan 2022 |
| 80.91.217.0/24 | 256 | RIPE NCC |  DE | 25th Jan 2022 |
| 80.91.240.0/20 | 4.1k | RIPE NCC |  SE | 20th 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 |
| 80.93.221.0/24 | 256 | RIPE NCC |  LU | 25th Jul 2005 |
| 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 |
| 81.162.128.0/18 | 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 |
| 81.17.192.0/21 | 2k | RIPE NCC |  FI | 11th Jan 2002 |
| 81.172.45.0/24 | 256 | RIPE NCC | DE | 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 |
| 81.25.96.0/20 | 4.1k | RIPE NCC |  IT | 22nd Mar 2002 |
| 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 |
| 81.27.239.0/24 | 256 | RIPE NCC | DE | 15th Apr 2002 |
| 81.27.65.0/24 | 256 | RIPE NCC | KZ | 11th Apr 2002 |
| 81.27.85.0/24 | 256 | RIPE NCC | GB | 11th Apr 2002 |
| 81.28.0.0/22 | 1k | RIPE NCC | RU | 16th Apr 2002 |
| 81.28.240.0/22 | 1k | RIPE NCC |  ES | 17th Aug 2018 |
| 81.28.64.0/20 | 4.1k | RIPE NCC | DE | 17th Apr 2002 |