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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.33.87.0/24 | 256 | RIPE NCC |  CY | 8th Oct 2019 |
| 193.33.97.0/24 | 256 | RIPE NCC |  NL | 31st May 2021 |
| 193.34.130.0/23 | 512 | RIPE NCC |  FR | 12th Oct 2006 |
| 193.34.134.0/23 | 512 | RIPE NCC |  GB | 29th Jun 2010 |
| 193.34.146.0/23 | 512 | RIPE NCC | GB | 20th Oct 2006 |
| 193.34.156.0/23 | 512 | RIPE NCC |  RO | 23rd Oct 2006 |
| 193.34.192.0/25 | 128 | RIPE NCC |  DE | 30th Oct 2006 |
| 193.34.192.128/25 | 128 | RIPE NCC |  MT | 16th Jan 2012 |
| 193.34.193.0/25 | 128 | RIPE NCC |  PL | 5th Dec 2006 |
| 193.34.195.0/25 | 128 | RIPE NCC | GB | 3rd Mar 2008 |
| 193.34.195.128/25 | 128 | RIPE NCC | PL | 9th Jan 2009 |
| 193.34.196.0/25 | 128 | RIPE NCC | PL | 5th Mar 2007 |
| 193.34.196.128/25 | 128 | RIPE NCC |  UA | 30th Nov 2023 |
| 193.34.197.0/25 | 128 | RIPE NCC | PL | 11th Apr 2007 |
| 193.34.197.128/25 | 128 | RIPE NCC | FR | 28th Aug 2012 |
| 193.34.198.0/26 | 64 | RIPE NCC |  CH | 12th Sept 2024 |
| 193.34.198.128/25 | 128 | RIPE NCC | PL | 27th Apr 2009 |
| 193.34.198.64/26 | 64 | RIPE NCC |  TR | 13th Sept 2024 |
| 193.34.199.0/25 | 128 | RIPE NCC | NL | 20th Aug 2010 |
| 193.34.199.128/26 | 64 | RIPE NCC | DE | 6th Jul 2026 |
| 193.34.200.0/25 | 128 | RIPE NCC | DE | 3rd Nov 2009 |
| 193.34.200.128/25 | 128 | RIPE NCC |  RU | 3rd Dec 2009 |
| 193.34.203.0/25 | 128 | RIPE NCC | RU | 6th Apr 2010 |
| 193.34.203.128/26 | 64 | RIPE NCC |  AE | 8th Jul 2025 |
| 193.34.203.192/26 | 64 | RIPE NCC | DE | 2nd Jul 2024 |
| 193.34.228.0/23 | 512 | RIPE NCC |  MC | 8th Oct 2019 |
| 193.34.36.0/22 | 1k | RIPE NCC | DE | 8th Nov 2006 |
| 193.34.88.0/22 | 1k | RIPE NCC |  BE | 24th Nov 2006 |
| 193.35.109.0/24 | 256 | RIPE NCC | RU | 16th Sept 2011 |
| 193.35.162.0/23 | 512 | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.164.0/22 | 1k | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.168.0/21 | 2k | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.176.0/22 | 1k | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.180.0/23 | 512 | RIPE NCC | GB | 3rd Aug 1994 |
| 193.35.182.0/23 | 512 | RIPE NCC | GB | 11th Jan 1993 |
| 193.35.184.0/21 | 2k | RIPE NCC | GB | 11th Jan 1993 |
| 193.35.192.0/22 | 1k | RIPE NCC | GB | 11th Jan 1993 |
| 193.35.2.0/23 | 512 | RIPE NCC | MC | 8th Oct 2019 |
| 193.35.24.0/24 | 256 | RIPE NCC | PL | 14th Nov 2019 |
| 193.35.246.0/24 | 256 | RIPE NCC | GB | 8th Feb 1993 |
| 193.35.247.0/24 | 256 | RIPE NCC | GB | 8th Feb 1993 |
| 193.35.37.0/24 | 256 | RIPE NCC |  IE | 25th Jun 2012 |
| 193.35.45.0/24 | 256 | RIPE NCC | PL | 24th Sept 2024 |
| 193.35.60.0/24 | 256 | RIPE NCC | PL | 4th Jul 2012 |
| 193.35.61.0/24 | 256 | RIPE NCC | PL | 14th Nov 2019 |
| 193.35.64.0/20 | 4.1k | RIPE NCC | CH | 27th Nov 1992 |
| 193.36.136.0/21 | 2k | RIPE NCC | GB | 2nd Sept 1994 |
| 193.36.152.0/21 | 2k | RIPE NCC | NL | 8th Mar 1993 |
| 193.36.16.0/20 | 4.1k | RIPE NCC | GB | 9th Feb 1993 |
| 193.36.160.0/23 | 512 | RIPE NCC | NL | 8th Mar 1993 |