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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,108 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.41.52.0/22 | 1k | RIPE NCC |  CA | 22nd Nov 2013 |
| 185.41.84.0/22 | 1k | RIPE NCC |  SY | 25th Nov 2013 |
| 185.42.0.0/22 | 1k | RIPE NCC |  GB | 2nd Dec 2013 |
| 185.42.148.0/22 | 1k | RIPE NCC |  US | 27th May 2019 |
| 185.42.200.0/22 | 1k | RIPE NCC |  NL | 11th Dec 2013 |
| 185.42.204.0/22 | 1k | RIPE NCC | US | 11th Dec 2013 |
| 185.43.100.0/22 | 1k | RIPE NCC |  RU | 19th Dec 2013 |
| 185.43.216.0/22 | 1k | RIPE NCC | GB | 23rd Dec 2013 |
| 185.43.34.0/24 | 256 | RIPE NCC | NL | 4th May 2026 |
| 185.44.0.0/22 | 1k | RIPE NCC | RU | 27th Dec 2013 |
| 185.44.178.0/23 | 512 | RIPE NCC |  DE | 9th Jan 2014 |
| 185.44.180.0/22 | 1k | RIPE NCC |  IT | 9th Jan 2014 |
| 185.44.188.0/22 | 1k | RIPE NCC |  CZ | 9th Jan 2014 |
| 185.44.224.0/22 | 1k | RIPE NCC | NL | 10th Jan 2014 |
| 185.44.32.0/22 | 1k | RIPE NCC | DE | 27th Dec 2013 |
| 185.46.0.0/22 | 1k | RIPE NCC |  IR | 27th Jan 2014 |
| 185.46.108.0/22 | 1k | RIPE NCC | IR | 30th Jan 2014 |
| 185.46.140.0/24 | 256 | RIPE NCC |  SI | 10th Jan 2024 |
| 185.46.152.0/24 | 256 | RIPE NCC | RU | 31st Jan 2014 |
| 185.46.153.0/24 | 256 | RIPE NCC | RU | 31st Jan 2014 |
| 185.46.154.0/24 | 256 | RIPE NCC | RU | 31st Jan 2014 |
| 185.46.156.0/22 | 1k | RIPE NCC | NL | 31st Jan 2014 |
| 185.46.165.0/24 | 256 | RIPE NCC |  FR | 3rd Feb 2014 |
| 185.46.166.0/23 | 512 | RIPE NCC |  BE | 3rd Feb 2014 |
| 185.46.237.0/24 | 256 | RIPE NCC |  ZA | 30th Jun 2025 |
| 185.46.4.0/22 | 1k | RIPE NCC |  CH | 20th Feb 2018 |
| 185.47.100.0/22 | 1k | RIPE NCC | US | 11th Feb 2014 |
| 185.47.166.0/24 | 256 | RIPE NCC |  AE | 11th Jan 2024 |
| 185.47.196.0/22 | 1k | RIPE NCC | NL | 14th Feb 2014 |
| 185.47.20.0/22 | 1k | RIPE NCC | NL | 6th Feb 2014 |
| 185.47.24.0/22 | 1k | RIPE NCC | CH | 6th Feb 2014 |
| 185.47.7.0/24 | 256 | RIPE NCC |  AZ | 6th Feb 2014 |
| 185.47.72.0/22 | 1k | RIPE NCC |  IE | 10th Feb 2014 |
| 185.48.184.0/22 | 1k | RIPE NCC |  MT | 24th Feb 2014 |
| 185.48.6.0/24 | 256 | RIPE NCC | FR | 11th Aug 2025 |
| 185.48.7.0/24 | 256 | RIPE NCC | CZ | 11th Aug 2025 |
| 185.49.104.0/23 | 512 | RIPE NCC | IR | 4th Mar 2014 |
| 185.49.88.0/22 | 1k | RIPE NCC |  BG | 28th Feb 2014 |
| 185.49.92.0/22 | 1k | RIPE NCC | GB | 3rd Mar 2014 |
| 185.5.116.0/22 | 1k | RIPE NCC | BG | 2nd Oct 2012 |
| 185.5.130.0/24 | 256 | RIPE NCC |  RO | 7th Mar 2023 |
| 185.5.176.0/22 | 1k | RIPE NCC |  TR | 4th Oct 2012 |
| 185.5.212.0/24 | 256 | RIPE NCC | DE | 13th Jun 2025 |
| 185.5.213.0/24 | 256 | RIPE NCC | IR | 16th Jun 2025 |
| 185.5.215.0/24 | 256 | RIPE NCC | DE | 16th Jun 2025 |
| 185.5.220.0/22 | 1k | RIPE NCC |  PS | 5th Oct 2012 |
| 185.5.4.0/22 | 1k | RIPE NCC |  MK | 28th Sept 2012 |
| 185.5.96.0/22 | 1k | RIPE NCC |  PL | 2nd Oct 2012 |
| 185.50.144.0/22 | 1k | RIPE NCC |  ES | 17th Mar 2014 |
| 185.50.156.0/22 | 1k | RIPE NCC | RU | 17th Mar 2014 |