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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.186.128.0/19 | 8.2k | RIPE NCC |  AT | 18th Dec 2001 |
| 193.186.14.0/24 | 256 | RIPE NCC |  RU | 12th Nov 2025 |
| 193.186.192.0/22 | 1k | RIPE NCC |  FR | 17th Sept 2018 |
| 193.186.209.0/24 | 256 | RIPE NCC | AT | 11th Feb 1997 |
| 193.186.211.0/24 | 256 | RIPE NCC |  DK | 12th Nov 2025 |
| 193.186.214.0/24 | 256 | RIPE NCC | AT | 12th May 1993 |
| 193.186.248.0/22 | 1k | RIPE NCC | AT | 16th Jun 1993 |
| 193.186.254.0/24 | 256 | RIPE NCC |  DE | 9th Aug 1993 |
| 193.186.255.0/24 | 256 | RIPE NCC |  PL | 13th Jul 2007 |
| 193.186.3.0/24 | 256 | RIPE NCC | DE | 16th Oct 2007 |
| 193.186.64.0/21 | 2k | RIPE NCC | AT | 11th Feb 1993 |
| 193.187.124.0/22 | 1k | RIPE NCC |  NL | 26th Oct 2018 |
| 193.187.152.0/22 | 1k | RIPE NCC | AT | 27th Nov 2018 |
| 193.187.160.0/22 | 1k | RIPE NCC | DK | 27th Nov 2018 |
| 193.187.244.0/24 | 256 | RIPE NCC | AT | 6th Sept 1993 |
| 193.187.245.0/24 | 256 | RIPE NCC | AT | 4th Oct 1993 |
| 193.187.246.0/24 | 256 | RIPE NCC | AT | 7th Oct 1993 |
| 193.187.247.0/24 | 256 | RIPE NCC | AT | 22nd Nov 1993 |
| 193.187.54.0/24 | 256 | RIPE NCC |  LB | 23rd Jul 2012 |
| 193.187.84.0/22 | 1k | RIPE NCC | DE | 9th May 2018 |
| 193.188.132.0/23 | 512 | RIPE NCC |  GB | 16th Jun 1997 |
| 193.188.134.0/26 | 64 | RIPE NCC | NL | 15th May 1996 |
| 193.188.134.144/28 | 16 | RIPE NCC | FR | 13th Dec 2011 |
| 193.188.134.160/29 | 8 | RIPE NCC | PL | 21st Jun 2006 |
| 193.188.134.168/29 | 8 | RIPE NCC |  CY | 14th Sept 2012 |
| 193.188.134.176/28 | 16 | RIPE NCC | CY | 14th Sept 2012 |
| 193.188.134.192/29 | 8 | RIPE NCC | CY | 14th Sept 2012 |
| 193.188.137.0/24 | 256 | RIPE NCC |  HU | 23rd Jul 1997 |
| 193.188.138.0/23 | 512 | RIPE NCC | DE | 15th Oct 2019 |
| 193.188.142.0/23 | 512 | RIPE NCC |  KW | 7th Oct 1994 |
| 193.188.152.0/23 | 512 | RIPE NCC | KW | 7th Oct 1994 |
| 193.188.201.0/24 | 256 | RIPE NCC |  SE | 27th Mar 1996 |
| 193.188.202.0/23 | 512 | RIPE NCC | SE | 27th Mar 1996 |
| 193.188.224.0/20 | 4.1k | RIPE NCC |  CH | 12th Jan 1996 |
| 193.188.253.0/24 | 256 | RIPE NCC | PL | 12th May 2005 |
| 193.188.4.0/24 | 256 | RIPE NCC | SE | 1st Sept 1993 |
| 193.188.5.0/24 | 256 | RIPE NCC | SE | 1st Sept 1993 |
| 193.188.6.0/24 | 256 | RIPE NCC | SE | 1st Sept 1993 |
| 193.189.106.0/23 | 512 | RIPE NCC | DE | 2nd May 2005 |
| 193.189.138.0/24 | 256 | RIPE NCC | RU | 3rd Sept 2012 |
| 193.189.140.0/24 | 256 | RIPE NCC | GB | 3rd May 2005 |
| 193.189.150.0/23 | 512 | RIPE NCC | DE | 24th Sept 1996 |
| 193.189.70.0/23 | 512 | RIPE NCC |  RO | 11th Apr 2005 |
| 193.189.82.0/23 | 512 | RIPE NCC | DE | 26th Apr 2005 |
| 193.189.84.0/23 | 512 | RIPE NCC | DE | 15th Oct 2019 |
| 193.189.90.0/23 | 512 | RIPE NCC | DK | 15th Oct 2019 |
| 193.19.0.0/19 | 8.2k | RIPE NCC | DE | 22nd Sept 1992 |
| 193.19.122.0/23 | 512 | RIPE NCC | PL | 22nd Dec 2003 |
| 193.19.140.0/22 | 1k | RIPE NCC | PL | 3rd Dec 2003 |
| 193.19.156.0/22 | 1k | RIPE NCC | GB | 5th Dec 2003 |