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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.135.32.0/21 | 2k | RIPE NCC |  CH | 28th May 1997 |
| 193.135.4.0/22 | 1k | RIPE NCC | CH | 28th May 1997 |
| 193.135.60.0/22 | 1k | RIPE NCC | CH | 28th May 1997 |
| 193.138.100.0/24 | 256 | RIPE NCC |  NL | 27th Feb 2003 |
| 193.138.109.0/24 | 256 | RIPE NCC | NL | 12th Mar 2003 |
| 193.138.112.0/24 | 256 | RIPE NCC |  DE | 13th Mar 2003 |
| 193.138.124.0/24 | 256 | RIPE NCC |  DK | 24th Mar 2003 |
| 193.138.140.0/22 | 1k | RIPE NCC |  PL | 15th Nov 2004 |
| 193.138.16.0/21 | 2k | RIPE NCC | DE | 22nd Sept 1997 |
| 193.138.180.0/22 | 1k | RIPE NCC | DE | 26th Nov 2004 |
| 193.138.200.0/22 | 1k | RIPE NCC |  FI | 3rd Dec 2004 |
| 193.138.26.0/24 | 256 | RIPE NCC | DE | 22nd Sept 1997 |
| 193.138.3.0/24 | 256 | RIPE NCC |  SI | 10th Sept 1992 |
| 193.138.31.0/24 | 256 | RIPE NCC | DE | 4th Apr 2005 |
| 193.138.66.0/24 | 256 | RIPE NCC | DE | 7th Feb 2003 |
| 193.138.68.0/24 | 256 | RIPE NCC | DE | 7th Feb 2003 |
| 193.138.69.0/24 | 256 | RIPE NCC | CH | 7th Feb 2003 |
| 193.138.71.0/24 | 256 | RIPE NCC |  SE | 10th Feb 2003 |
| 193.138.76.0/24 | 256 | RIPE NCC | DK | 13th Feb 2003 |
| 193.138.83.0/24 | 256 | RIPE NCC | DE | 17th Feb 2003 |
| 193.138.95.0/24 | 256 | RIPE NCC |  GB | 24th Feb 2003 |
| 193.138.96.0/24 | 256 | RIPE NCC | DE | 25th Feb 2003 |
| 193.139.0.0/16 | 65.5k | RIPE NCC |  FR | 7th Oct 1992 |
| 193.141.140.0/23 | 512 | RIPE NCC |  US | 1st Sept 1993 |
| 193.141.177.0/24 | 256 | RIPE NCC | PL | 18th Nov 2019 |
| 193.142.110.0/24 | 256 | RIPE NCC |  NO | 12th Mar 2007 |
| 193.142.113.0/24 | 256 | RIPE NCC | PL | 15th Mar 2007 |
| 193.142.117.0/24 | 256 | RIPE NCC | FI | 18th Nov 2019 |
| 193.142.118.0/24 | 256 | RIPE NCC | GB | 16th Mar 2007 |
| 193.142.119.0/24 | 256 | RIPE NCC | GB | 16th Mar 2007 |
| 193.142.120.0/24 | 256 | RIPE NCC | FI | 2nd Aug 1993 |
| 193.142.126.0/24 | 256 | RIPE NCC | FI | 18th Nov 2019 |
| 193.142.136.0/21 | 2k | RIPE NCC | FI | 29th Jun 1994 |
| 193.142.160.0/20 | 4.1k | RIPE NCC | SE | 29th Jun 1994 |
| 193.142.205.0/24 | 256 | RIPE NCC |  RO | 18th Nov 2019 |
| 193.142.215.0/24 | 256 | RIPE NCC | NL | 23rd Mar 2007 |
| 193.142.220.0/24 | 256 | RIPE NCC | GB | 26th Mar 2007 |
| 193.142.223.0/24 | 256 | RIPE NCC | RO | 18th Nov 2019 |
| 193.142.232.0/23 | 512 | RIPE NCC |  IR | 11th Oct 2019 |
| 193.142.234.0/24 | 256 | RIPE NCC | RO | 18th Nov 2019 |
| 193.142.24.0/23 | 512 | RIPE NCC | FI | 3rd Jan 1995 |
| 193.142.240.0/24 | 256 | RIPE NCC | SE | 2nd Nov 1994 |
| 193.142.243.0/24 | 256 | RIPE NCC | PL | 28th Mar 2007 |
| 193.142.245.0/24 | 256 | RIPE NCC |  MT | 17th Nov 2011 |
| 193.142.252.0/24 | 256 | RIPE NCC | FI | 13th May 1994 |
| 193.142.254.0/23 | 512 | RIPE NCC | IR | 11th Oct 2019 |
| 193.142.28.0/23 | 512 | RIPE NCC | FR | 11th Oct 2019 |
| 193.142.33.0/24 | 256 | RIPE NCC |  TR | 8th Apr 2024 |
| 193.142.48.0/23 | 512 | RIPE NCC | FR | 11th Oct 2019 |
| 193.142.5.0/24 | 256 | RIPE NCC | FI | 30th Nov 1992 |