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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
24,888 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.32.17.0/24 | 256 | RIPE NCC |  GB | 21st Aug 1992 |
| 193.32.172.0/22 | 1k | RIPE NCC |  DE | 27th Nov 2018 |
| 193.32.19.0/24 | 256 | RIPE NCC |  NL | 3rd Oct 2006 |
| 193.32.196.0/23 | 512 | RIPE NCC |  RU | 18th Oct 2018 |
| 193.32.200.0/23 | 512 | RIPE NCC | RU | 18th Oct 2018 |
| 193.32.24.0/22 | 1k | RIPE NCC | GB | 21st Aug 1992 |
| 193.32.250.0/23 | 512 | RIPE NCC | GB | 27th Nov 1992 |
| 193.32.252.0/23 | 512 | RIPE NCC | GB | 27th Nov 1992 |
| 193.32.254.0/24 | 256 | RIPE NCC | GB | 28th Nov 1992 |
| 193.32.255.0/24 | 256 | RIPE NCC | GB | 20th Apr 1995 |
| 193.32.3.0/24 | 256 | RIPE NCC |  SE | 17th Aug 1992 |
| 193.32.31.0/24 | 256 | RIPE NCC |  US | 27th Aug 1992 |
| 193.32.32.0/24 | 256 | RIPE NCC | US | 27th Aug 1992 |
| 193.32.33.0/24 | 256 | RIPE NCC | US | 27th Aug 1992 |
| 193.32.35.0/24 | 256 | RIPE NCC | US | 27th Aug 1992 |
| 193.32.39.0/24 | 256 | RIPE NCC | GB | 8th Jun 2007 |
| 193.32.41.0/24 | 256 | RIPE NCC |  CH | 9th Sept 1992 |
| 193.32.42.0/23 | 512 | RIPE NCC | CH | 9th Sept 1992 |
| 193.32.44.0/24 | 256 | RIPE NCC | CH | 9th Sept 1992 |
| 193.32.45.0/24 | 256 | RIPE NCC | GB | 11th Sept 1992 |
| 193.32.52.0/24 | 256 | RIPE NCC |  LV | 20th Jul 2012 |
| 193.32.6.0/23 | 512 | RIPE NCC | GB | 21st Dec 1994 |
| 193.32.82.0/24 | 256 | RIPE NCC | GB | 4th May 1994 |
| 193.32.83.0/24 | 256 | RIPE NCC | GB | 4th May 1994 |
| 193.32.84.0/24 | 256 | RIPE NCC |  LI | 12th Apr 2021 |
| 193.32.88.0/22 | 1k | RIPE NCC | GB | 29th Sept 1992 |
| 193.33.102.0/23 | 512 | RIPE NCC |  AE | 10th Aug 2011 |
| 193.33.12.0/23 | 512 | RIPE NCC |  FR | 19th Jan 2007 |
| 193.33.138.0/23 | 512 | RIPE NCC | SE | 2nd Apr 2007 |
| 193.33.14.0/23 | 512 | RIPE NCC |  CZ | 19th Jan 2007 |
| 193.33.152.0/24 | 256 | RIPE NCC |  UA | 15th May 2024 |
| 193.33.162.0/23 | 512 | RIPE NCC | CZ | 8th Oct 2019 |
| 193.33.20.0/23 | 512 | RIPE NCC | DE | 25th Jan 2007 |
| 193.33.209.0/24 | 256 | RIPE NCC | DE | 20th Dec 2019 |
| 193.33.212.0/23 | 512 | RIPE NCC |  CA | 26th Apr 2007 |
| 193.33.242.0/23 | 512 | RIPE NCC |  IT | 8th Oct 2019 |
| 193.33.245.0/24 | 256 | RIPE NCC | SE | 8th Sept 2025 |
| 193.33.252.0/23 | 512 | RIPE NCC | IT | 8th Oct 2019 |
| 193.33.35.0/24 | 256 | RIPE NCC | NL | 20th Feb 2023 |
| 193.33.4.0/23 | 512 | RIPE NCC |  PL | 16th Jan 2007 |
| 193.33.49.0/24 | 256 | RIPE NCC | GB | 5th Feb 2007 |
| 193.33.54.0/23 | 512 | RIPE NCC | UA | 7th Feb 2007 |
| 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 |