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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
25,283 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.149.165.0/24 | 256 | RIPE NCC |  DK | 24th Jan 1996 |
| 193.149.171.0/24 | 256 | RIPE NCC | DK | 24th Jan 1996 |
| 193.149.172.0/24 | 256 | RIPE NCC | DK | 24th Jan 1996 |
| 193.149.177.0/24 | 256 | RIPE NCC | DK | 24th Jan 1996 |
| 193.149.181.0/24 | 256 | RIPE NCC |  NL | 24th Jan 1996 |
| 193.149.184.0/24 | 256 | RIPE NCC | DK | 24th Jan 1996 |
| 193.149.186.0/24 | 256 | RIPE NCC | DK | 24th Jan 1996 |
| 193.149.188.0/24 | 256 | RIPE NCC | DK | 24th Jan 1996 |
| 193.149.191.0/24 | 256 | RIPE NCC | DK | 24th Jan 1996 |
| 193.149.208.0/21 | 2k | RIPE NCC | NL | 10th Jun 1998 |
| 193.149.216.0/24 | 256 | RIPE NCC | NL | 10th Jun 1998 |
| 193.149.218.0/23 | 512 | RIPE NCC | NL | 10th Jun 1998 |
| 193.149.220.0/22 | 1k | RIPE NCC | NL | 10th Jun 1998 |
| 193.149.224.0/24 | 256 | RIPE NCC | NL | 10th Jun 1998 |
| 193.149.226.0/23 | 512 | RIPE NCC | NL | 10th Jun 1998 |
| 193.149.228.0/22 | 1k | RIPE NCC | NL | 10th Jun 1998 |
| 193.149.232.0/21 | 2k | RIPE NCC | NL | 10th Jun 1998 |
| 193.150.104.0/24 | 256 | RIPE NCC |  SE | 20th Oct 2011 |
| 193.150.118.0/23 | 512 | RIPE NCC |  RU | 21st Oct 2011 |
| 193.150.169.0/24 | 256 | RIPE NCC |  FR | 28th Jun 2000 |
| 193.150.174.0/23 | 512 | RIPE NCC |  AT | 1st Dec 1997 |
| 193.150.176.0/22 | 1k | RIPE NCC | AT | 1st Dec 1997 |
| 193.150.188.0/22 | 1k | RIPE NCC |  GB | 15th Dec 1997 |
| 193.150.28.0/22 | 1k | RIPE NCC |  UA | 13th Oct 2011 |
| 193.150.68.0/24 | 256 | RIPE NCC |  IT | 1st Mar 2021 |
| 193.150.8.0/22 | 1k | RIPE NCC |  HK | 11th Oct 2011 |
| 193.151.168.0/22 | 1k | RIPE NCC | RU | 24th Oct 2018 |
| 193.151.227.0/24 | 256 | RIPE NCC | RU | 9th Aug 2012 |
| 193.151.246.0/24 | 256 | RIPE NCC |  ES | 5th Feb 2024 |
| 193.151.247.0/24 | 256 | RIPE NCC |  KZ | 20th May 2026 |
| 193.151.248.0/22 | 1k | RIPE NCC |  DE | 29th Mar 2005 |
| 193.151.44.0/23 | 512 | RIPE NCC | DE | 16th Apr 2004 |
| 193.151.64.0/22 | 1k | RIPE NCC |  PL | 26th Apr 2004 |
| 193.151.8.0/22 | 1k | RIPE NCC | PL | 6th Apr 2004 |
| 193.16.1.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.100.0/24 | 256 | RIPE NCC |  NO | 1st Jun 2004 |
| 193.16.108.0/24 | 256 | RIPE NCC | GB | 8th Jun 2004 |
| 193.16.12.0/22 | 1k | RIPE NCC |  CZ | 6th Jul 2018 |
| 193.16.157.0/24 | 256 | RIPE NCC |  BA | 12th Nov 2024 |
| 193.16.184.0/23 | 512 | RIPE NCC | DE | 7th Mar 1995 |
| 193.16.212.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.214.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.219.0/24 | 256 | RIPE NCC |  GR | 20th Jan 2004 |
| 193.16.222.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.228.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.230.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.238.0/24 | 256 | RIPE NCC |  IL | 6th Aug 2010 |
| 193.16.248.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.249.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.16.250.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |