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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,619 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 82.130.0.0/18 | 16.4k | RIPE NCC |  FI | 5th May 2006 |
| 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 |
| 82.146.0.0/22 | 1k | RIPE NCC |  BG | 17th Jun 2003 |
| 82.149.80.0/22 | 1k | RIPE NCC | DE | 4th 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 |
| 82.163.80.0/20 | 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 |
| 82.180.0.0/19 | 8.2k | RIPE NCC | DK | 9th Oct 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 |
| 82.197.76.0/22 | 1k | RIPE NCC | DE | 6th Nov 2003 |
| 82.198.0.0/20 | 4.1k | RIPE NCC |  RU | 14th Nov 2003 |
| 82.205.136.0/21 | 2k | RIPE NCC | DE | 17th Nov 2003 |
| 82.205.144.0/20 | 4.1k | RIPE NCC | DE | 17th Nov 2003 |
| 82.205.192.0/21 | 2k | RIPE NCC | DE | 17th Nov 2003 |
| 82.205.224.0/19 | 8.2k | RIPE NCC |  AE | 17th Nov 2003 |
| 82.214.0.0/18 | 16.4k | RIPE NCC | SE | 31st Oct 2003 |
| 82.97.64.0/18 | 16.4k | RIPE NCC | DE | 1st Dec 2003 |
| 82.98.200.0/21 | 2k | RIPE NCC | DE | 9th Dec 2003 |
| 83.101.160.0/22 | 1k | RIPE NCC |  SA | 24th Feb 2004 |
| 83.101.168.0/21 | 2k | RIPE NCC | SA | 24th Feb 2004 |
| 83.101.176.0/20 | 4.1k | RIPE NCC | SA | 24th Feb 2004 |
| 83.101.192.0/18 | 16.4k | RIPE NCC | SA | 24th Feb 2004 |
| 83.118.232.0/21 | 2k | RIPE NCC |  US | 16th Dec 2003 |
| 83.137.88.0/21 | 2k | RIPE NCC |  UA | 14th May 2004 |
| 83.138.24.0/21 | 2k | RIPE NCC | GB | 11th Jan 2006 |
| 83.138.50.0/24 | 256 | RIPE NCC |  LT | 12th Aug 2021 |
| 83.138.61.0/24 | 256 | RIPE NCC |  NL | 3rd Jan 2020 |
| 83.138.63.0/24 | 256 | RIPE NCC |  BE | 6th Jan 2020 |
| 83.139.204.0/22 | 1k | RIPE NCC |  IT | 7th Sept 2004 |
| 83.139.222.0/23 | 512 | RIPE NCC | IT | 7th Sept 2004 |
| 83.139.240.0/23 | 512 | RIPE NCC | IT | 7th Sept 2004 |
| 83.139.246.0/23 | 512 | RIPE NCC | IT | 7th Sept 2004 |
| 83.139.248.0/21 | 2k | RIPE NCC | IT | 7th Sept 2004 |