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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.219.116.0/24 | 256 | RIPE NCC |  NL | 29th Sept 2006 |
| 193.219.122.0/24 | 256 | RIPE NCC |  IT | 16th Dec 2024 |
| 193.219.126.0/24 | 256 | RIPE NCC |  PL | 2nd Oct 2006 |
| 193.219.16.0/21 | 2k | RIPE NCC |  DK | 5th Jan 1998 |
| 193.219.24.0/22 | 1k | RIPE NCC | DK | 5th Jan 1998 |
| 193.219.29.0/24 | 256 | RIPE NCC | IT | 2nd Jun 2005 |
| 193.22.1.0/24 | 256 | RIPE NCC |  GB | 13th Nov 2019 |
| 193.22.102.0/24 | 256 | RIPE NCC | NL | 17th Nov 2003 |
| 193.22.106.0/24 | 256 | RIPE NCC | GB | 13th Nov 2019 |
| 193.22.107.0/24 | 256 | RIPE NCC |  FR | 10th Nov 2003 |
| 193.22.109.0/24 | 256 | RIPE NCC |  DE | 29th Jul 1992 |
| 193.22.116.0/23 | 512 | RIPE NCC | DE | 29th Jul 1992 |
| 193.22.118.0/24 | 256 | RIPE NCC | DE | 29th Jul 1992 |
| 193.22.156.0/22 | 1k | RIPE NCC |  AT | 7th Sept 2018 |
| 193.22.160.0/24 | 256 | RIPE NCC | DE | 24th Oct 2025 |
| 193.22.163.0/24 | 256 | RIPE NCC |  TR | 24th Oct 2025 |
| 193.22.168.0/24 | 256 | RIPE NCC |  SE | 13th Nov 2019 |
| 193.22.169.0/24 | 256 | RIPE NCC | PL | 6th Apr 2004 |
| 193.22.170.0/24 | 256 | RIPE NCC | SE | 13th Nov 2019 |
| 193.22.176.0/22 | 1k | RIPE NCC | DE | 29th Jul 1992 |
| 193.22.184.0/21 | 2k | RIPE NCC | DE | 29th Jul 1992 |
| 193.22.226.0/23 | 512 | RIPE NCC | FR | 7th Sept 2018 |
| 193.22.232.0/22 | 1k | RIPE NCC | DE | 7th Sept 2018 |
| 193.22.236.0/22 | 1k | RIPE NCC | DE | 7th Sept 2018 |
| 193.22.24.0/22 | 1k | RIPE NCC | DE | 25th Apr 2018 |
| 193.22.243.0/24 | 256 | RIPE NCC | GB | 25th Nov 2003 |
| 193.22.244.0/24 | 256 | RIPE NCC |  RU | 13th Nov 2019 |
| 193.22.30.0/24 | 256 | RIPE NCC |  CY | 16th Dec 2003 |
| 193.22.5.0/24 | 256 | RIPE NCC |  FI | 18th Nov 2003 |
| 193.22.80.0/24 | 256 | RIPE NCC | GB | 13th Nov 2019 |
| 193.22.82.0/24 | 256 | RIPE NCC | AT | 16th Jun 2004 |
| 193.22.86.0/24 | 256 | RIPE NCC | GB | 13th Nov 2019 |
| 193.22.92.0/24 | 256 | RIPE NCC | FR | 22nd Jun 2004 |
| 193.221.204.0/22 | 1k | RIPE NCC |  EE | 18th Sept 2018 |
| 193.221.211.0/24 | 256 | RIPE NCC |  MD | 11th May 2021 |
| 193.221.218.0/24 | 256 | AFRINIC |  CI | 24th Aug 1994 |
| 193.221.224.0/19 | 8.2k | RIPE NCC |  BE | 1st Jan 1994 |
| 193.221.84.0/23 | 512 | RIPE NCC | GB | 20th Dec 1993 |
| 193.221.86.0/23 | 512 | RIPE NCC | BE | 20th Dec 1993 |
| 193.221.88.0/22 | 1k | RIPE NCC | BE | 20th Dec 1993 |
| 193.221.92.0/24 | 256 | RIPE NCC | BE | 20th Dec 1993 |
| 193.222.0.0/19 | 8.2k | RIPE NCC |  CH | 1st Sept 1993 |
| 193.222.100.0/22 | 1k | RIPE NCC | AT | 19th Jul 2018 |
| 193.222.108.0/24 | 256 | RIPE NCC | GB | 14th Jun 2023 |
| 193.222.132.0/24 | 256 | RIPE NCC | NL | 18th Aug 2005 |
| 193.222.176.0/21 | 2k | RIPE NCC | CH | 1st Sept 1993 |
| 193.222.184.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 193.222.190.0/24 | 256 | RIPE NCC | TR | 2nd Jun 2026 |
| 193.222.32.0/20 | 4.1k | RIPE NCC | CH | 1st Sept 1993 |
| 193.223.1.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |