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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 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 |
| 81.29.0.0/20 | 4.1k | RIPE NCC |  CW | 24th Apr 2002 |
| 81.30.102.0/24 | 256 | RIPE NCC |  FR | 18th Jun 2024 |
| 81.30.106.0/24 | 256 | RIPE NCC |  MH | 21st Jun 2024 |
| 81.30.111.0/24 | 256 | RIPE NCC | DE | 25th Jun 2024 |
| 81.30.99.0/24 | 256 | RIPE NCC | ES | 18th Jun 2024 |
| 81.31.216.0/21 | 2k | RIPE NCC |  NL | 10th Aug 2012 |
| 81.85.112.0/20 | 4.1k | RIPE NCC | NL | 30th May 2002 |
| 81.85.68.0/22 | 1k | RIPE NCC | GB | 30th May 2002 |
| 81.89.144.0/20 | 4.1k | RIPE NCC |  SE | 16th Sept 2009 |
| 81.91.192.0/20 | 4.1k | RIPE NCC | GB | 22nd Jul 2002 |
| 81.94.34.0/24 | 256 | RIPE NCC | RU | 9th Aug 2002 |
| 81.94.40.0/24 | 256 | RIPE NCC | RU | 9th Aug 2002 |
| 81.94.96.0/20 | 4.1k | RIPE NCC |  US | 14th Aug 2002 |
| 81.95.208.0/20 | 4.1k | RIPE NCC | RU | 31st May 2006 |
| 81.95.54.0/23 | 512 | RIPE NCC | DE | 19th May 2006 |
| 82.115.15.0/24 | 256 | RIPE NCC |  BZ | 6th Jan 2004 |
| 82.115.192.0/20 | 4.1k | RIPE NCC | SE | 19th Jan 2004 |
| 82.115.224.0/20 | 4.1k | RIPE NCC | SE | 19th Jan 2004 |
| 82.115.240.0/21 | 2k | RIPE NCC | SE | 19th Jan 2004 |
| 82.115.248.0/22 | 1k | RIPE NCC | SE | 19th Jan 2004 |
| 82.115.252.0/24 | 256 | RIPE NCC | GB | 19th Jan 2004 |
| 82.115.253.0/24 | 256 | RIPE NCC | SE | 19th Jan 2004 |
| 82.115.254.0/23 | 512 | RIPE NCC | SE | 19th Jan 2004 |
| 82.115.36.0/22 | 1k | RIPE NCC | KZ | 7th Jan 2004 |
| 82.142.192.0/18 | 16.4k | RIPE NCC | GB | 9th Sept 2003 |
| 82.143.192.0/18 | 16.4k | RIPE NCC |  DK | 15th Sept 2003 |
| 82.145.128.0/19 | 8.2k | RIPE NCC | SE | 16th Jun 2003 |
| 82.148.224.0/19 | 8.2k | RIPE NCC | GB | 1st Aug 2003 |
| 82.158.176.0/22 | 1k | RIPE NCC | ES | 2nd Dec 2003 |
| 82.158.184.0/22 | 1k | RIPE NCC |  HR | 2nd Dec 2003 |
| 82.158.188.0/22 | 1k | RIPE NCC | HR | 2nd Dec 2003 |
| 82.158.208.0/20 | 4.1k | RIPE NCC | US | 2nd Dec 2003 |
| 82.163.168.0/21 | 2k | RIPE NCC |  PS | 25th Jul 2003 |
| 82.163.64.0/21 | 2k | RIPE NCC | PS | 25th Jul 2003 |
| 82.163.80.0/20 | 4.1k | RIPE NCC | GB | 25th Jul 2003 |
| 82.178.34.0/23 | 512 | RIPE NCC |  OM | 5th Sept 2003 |
| 82.178.36.0/22 | 1k | RIPE NCC | OM | 5th Sept 2003 |
| 82.178.48.0/20 | 4.1k | RIPE NCC | OM | 5th Sept 2003 |
| 82.192.100.0/22 | 1k | RIPE NCC | GB | 23rd Sept 2003 |
| 82.192.96.0/23 | 512 | RIPE NCC | GB | 23rd Sept 2003 |
| 82.198.0.0/19 | 8.2k | RIPE NCC | RU | 14th Nov 2003 |
| 82.202.184.0/23 | 512 | RIPE NCC |  CH | 6th Oct 2003 |
| 82.205.134.0/23 | 512 | RIPE NCC | DE | 17th Nov 2003 |
| 82.205.136.0/21 | 2k | RIPE NCC | DE | 17th Nov 2003 |