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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,584 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 45.88.64.0/24 | 256 | RIPE NCC |  IL | 18th Jun 2019 |
| 45.89.0.0/22 | 1k | RIPE NCC |  CH | 20th Jun 2019 |
| 45.89.108.0/22 | 1k | RIPE NCC |  CY | 20th Jun 2019 |
| 45.89.12.0/22 | 1k | RIPE NCC |  AT | 20th Jun 2019 |
| 45.89.120.0/22 | 1k | RIPE NCC |  IT | 21st Jun 2019 |
| 45.9.176.0/22 | 1k | RIPE NCC |  DE | 23rd Apr 2019 |
| 45.9.21.0/24 | 256 | RIPE NCC |  PL | 28th Aug 2023 |
| 45.9.232.0/24 | 256 | ARIN |  US | 15th Feb 2024 |
| 45.9.244.0/22 | 1k | RIPE NCC |  FR | 23rd Apr 2019 |
| 45.9.96.0/22 | 1k | RIPE NCC | IT | 18th Apr 2019 |
| 45.90.126.0/23 | 512 | RIPE NCC | IT | 25th Jun 2019 |
| 45.90.128.0/22 | 1k | RIPE NCC |  RO | 25th Jun 2019 |
| 45.90.152.0/22 | 1k | RIPE NCC | DE | 25th Jun 2019 |
| 45.90.212.0/22 | 1k | RIPE NCC |  SE | 26th Jun 2019 |
| 45.91.204.0/22 | 1k | RIPE NCC | CH | 27th Jun 2019 |
| 45.91.229.0/24 | 256 | RIPE NCC | IT | 28th Jun 2019 |
| 45.91.230.0/23 | 512 | RIPE NCC | IT | 28th Jun 2019 |
| 45.91.232.0/22 | 1k | RIPE NCC |  ES | 28th Jun 2019 |
| 45.91.24.0/22 | 1k | RIPE NCC | AT | 26th Jun 2019 |
| 45.91.96.0/22 | 1k | RIPE NCC |  NL | 27th Jun 2019 |
| 45.92.100.0/22 | 1k | RIPE NCC |  EE | 1st Jul 2019 |
| 45.92.140.0/22 | 1k | RIPE NCC | CY | 1st Jul 2019 |
| 45.92.160.0/22 | 1k | RIPE NCC | CY | 1st Jul 2019 |
| 45.92.164.0/22 | 1k | RIPE NCC | CY | 1st Jul 2019 |
| 45.92.174.0/24 | 256 | RIPE NCC |  RU | 1st Jul 2019 |
| 45.92.212.0/22 | 1k | RIPE NCC | AT | 1st Jul 2019 |
| 45.92.220.0/22 | 1k | RIPE NCC |  GB | 2nd Jul 2019 |
| 45.93.176.0/22 | 1k | RIPE NCC | DE | 4th Jul 2019 |
| 45.93.180.0/22 | 1k | RIPE NCC | ES | 4th Jul 2019 |
| 45.93.188.0/22 | 1k | RIPE NCC | DE | 4th Jul 2019 |
| 45.93.240.0/22 | 1k | RIPE NCC | SE | 5th Jul 2019 |
| 45.94.144.0/22 | 1k | RIPE NCC | NL | 8th Jul 2019 |
| 45.94.164.0/22 | 1k | RIPE NCC | AT | 8th Jul 2019 |
| 45.94.23.0/24 | 256 | RIPE NCC | RU | 5th Jul 2019 |
| 45.94.64.0/22 | 1k | RIPE NCC | DE | 5th Jul 2019 |
| 45.94.76.0/22 | 1k | RIPE NCC | RU | 5th Jul 2019 |
| 45.95.11.0/24 | 256 | RIPE NCC |  MD | 4th Jun 2021 |
| 45.95.140.0/22 | 1k | RIPE NCC | AT | 10th Jul 2019 |
| 45.95.160.0/22 | 1k | RIPE NCC | DE | 10th Jul 2019 |
| 45.95.244.0/22 | 1k | RIPE NCC |  OM | 10th Jul 2019 |
| 45.95.9.0/24 | 256 | RIPE NCC | FR | 3rd Jun 2021 |
| 46.102.103.0/24 | 256 | RIPE NCC | ES | 25th Jun 2010 |
| 46.102.158.0/23 | 512 | RIPE NCC | US | 25th Jun 2010 |
| 46.102.177.0/24 | 256 | RIPE NCC | GB | 25th Jun 2010 |
| 46.102.239.0/24 | 256 | RIPE NCC | US | 25th Jun 2010 |
| 46.102.240.0/21 | 2k | RIPE NCC | RO | 25th Jun 2010 |
| 46.102.255.0/24 | 256 | RIPE NCC | IT | 25th Jun 2010 |
| 46.148.160.0/20 | 4.1k | RIPE NCC | PL | 18th Nov 2010 |
| 46.149.105.0/24 | 256 | RIPE NCC | DE | 28th Jan 2020 |
| 46.149.128.0/20 | 4.1k | RIPE NCC | RU | 27th Dec 2010 |