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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.234.248.0/22 | 1k | RIPE NCC |  SK | 1st Dec 2017 |
| 185.234.4.0/22 | 1k | RIPE NCC |  RO | 27th Nov 2017 |
| 185.234.44.0/22 | 1k | RIPE NCC |  DE | 28th Nov 2017 |
| 185.234.76.0/22 | 1k | RIPE NCC |  FR | 28th Nov 2017 |
| 185.235.108.0/22 | 1k | RIPE NCC |  BE | 5th Dec 2017 |
| 185.235.152.0/22 | 1k | RIPE NCC |  AT | 5th Dec 2017 |
| 185.235.180.0/22 | 1k | RIPE NCC |  US | 6th Dec 2017 |
| 185.235.244.0/24 | 256 | RIPE NCC |  JE | 9th Jul 2021 |
| 185.235.252.0/22 | 1k | RIPE NCC |  CY | 7th Dec 2017 |
| 185.235.70.0/24 | 256 | RIPE NCC | RO | 4th Dec 2017 |
| 185.235.76.0/24 | 256 | RIPE NCC |  PL | 28th Jan 2021 |
| 185.236.124.0/22 | 1k | RIPE NCC |  GB | 12th Dec 2017 |
| 185.236.232.0/22 | 1k | RIPE NCC |  MD | 14th Dec 2017 |
| 185.236.236.0/22 | 1k | RIPE NCC |  BG | 14th Dec 2017 |
| 185.236.44.0/24 | 256 | RIPE NCC |  IE | 8th Feb 2021 |
| 185.236.45.0/24 | 256 | RIPE NCC |  IR | 9th Feb 2021 |
| 185.236.80.0/22 | 1k | RIPE NCC | AT | 11th Dec 2017 |
| 185.237.108.0/22 | 1k | RIPE NCC |  CH | 18th Dec 2017 |
| 185.237.112.0/22 | 1k | RIPE NCC | CH | 18th Dec 2017 |
| 185.237.116.0/22 | 1k | RIPE NCC | CH | 18th Dec 2017 |
| 185.237.120.0/22 | 1k | RIPE NCC | CH | 18th Dec 2017 |
| 185.237.188.0/22 | 1k | RIPE NCC |  TR | 19th Dec 2017 |
| 185.237.196.0/22 | 1k | RIPE NCC | GB | 20th Dec 2017 |
| 185.237.240.0/22 | 1k | RIPE NCC |  RS | 20th Dec 2017 |
| 185.237.44.0/22 | 1k | RIPE NCC | BE | 15th Dec 2017 |
| 185.237.52.0/22 | 1k | RIPE NCC | IE | 15th Dec 2017 |
| 185.237.92.0/24 | 256 | RIPE NCC | DE | 12th Jan 2024 |
| 185.238.117.0/24 | 256 | RIPE NCC | GB | 22nd Dec 2017 |
| 185.238.137.0/24 | 256 | RIPE NCC | PL | 18th Aug 2023 |
| 185.238.184.0/22 | 1k | RIPE NCC |  FI | 28th Dec 2017 |
| 185.238.20.0/22 | 1k | RIPE NCC | IR | 20th Dec 2017 |
| 185.238.24.0/22 | 1k | RIPE NCC | DE | 20th Dec 2017 |
| 185.239.168.0/23 | 512 | RIPE NCC |  NL | 4th Jan 2018 |
| 185.239.172.0/24 | 256 | RIPE NCC | US | 4th Jan 2018 |
| 185.239.173.0/24 | 256 | RIPE NCC | IE | 4th Jan 2018 |
| 185.239.174.0/24 | 256 | RIPE NCC |  IT | 4th Jan 2018 |
| 185.239.200.0/22 | 1k | RIPE NCC |  ES | 5th Jan 2018 |
| 185.24.228.0/22 | 1k | RIPE NCC | IR | 24th Apr 2013 |
| 185.24.248.0/22 | 1k | RIPE NCC |  SE | 25th Apr 2013 |
| 185.24.36.0/22 | 1k | RIPE NCC |  SI | 17th Apr 2013 |
| 185.24.85.0/24 | 256 | RIPE NCC | GB | 18th Apr 2013 |
| 185.24.88.0/22 | 1k | RIPE NCC | PL | 18th Apr 2013 |
| 185.24.96.0/22 | 1k | RIPE NCC | DE | 18th Apr 2013 |
| 185.240.100.0/23 | 512 | RIPE NCC |  LT | 9th Jan 2018 |
| 185.240.152.0/22 | 1k | RIPE NCC | BG | 10th Jan 2018 |
| 185.240.244.0/22 | 1k | RIPE NCC | DE | 12th Jan 2018 |
| 185.241.112.0/22 | 1k | RIPE NCC | FR | 15th Jan 2018 |
| 185.241.132.0/22 | 1k | RIPE NCC | IE | 16th Jan 2018 |
| 185.241.205.0/24 | 256 | RIPE NCC | GB | 15th Jan 2025 |
| 185.241.58.0/24 | 256 | RIPE NCC | DE | 23rd Aug 2021 |