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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,960 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 45.92.100.0/22 | 1k | RIPE NCC |  EE | 1st Jul 2019 |
| 45.92.140.0/22 | 1k | RIPE NCC |  CY | 1st Jul 2019 |
| 45.92.164.0/22 | 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 |
| 45.92.76.0/24 | 256 | RIPE NCC |  NL | 12th Jan 2022 |
| 45.92.78.0/24 | 256 | RIPE NCC | NL | 12th Jan 2022 |
| 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 |
| 45.93.196.0/23 | 512 | RIPE NCC | DE | 4th Jul 2019 |
| 45.93.198.0/24 | 256 | RIPE NCC |  FR | 4th Jul 2019 |
| 45.93.199.0/24 | 256 | RIPE NCC | FR | 4th Jul 2019 |
| 45.93.20.0/24 | 256 | RIPE NCC |  HK | 25th Jan 2022 |
| 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 |
| 45.94.64.0/22 | 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 |
| 45.95.244.0/22 | 1k | RIPE NCC |  OM | 10th Jul 2019 |
| 45.95.84.0/22 | 1k | RIPE NCC | FR | 9th 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 |
| 46.102.177.0/24 | 256 | RIPE NCC | GB | 25th Jun 2010 |
| 46.102.191.0/24 | 256 | RIPE NCC | RU | 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 |
| 46.102.251.0/24 | 256 | RIPE NCC |  LT | 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 |
| 46.149.175.0/24 | 256 | RIPE NCC | RU | 29th Oct 2018 |
| 46.149.97.0/24 | 256 | RIPE NCC | IT | 28th Jan 2020 |
| 46.151.128.0/21 | 2k | RIPE NCC |  HR | 29th Nov 2010 |
| 46.16.0.0/21 | 2k | RIPE NCC | GB | 27th Sept 2010 |
| 46.16.165.0/24 | 256 | RIPE NCC |  UA | 7th Oct 2010 |
| 46.163.104.0/21 | 2k | RIPE NCC | DE | 30th Nov 2010 |
| 46.163.96.0/22 | 1k | RIPE NCC | DE | 30th Nov 2010 |
| 46.17.176.0/22 | 1k | ARIN | US | 21st May 2024 |
| 46.17.192.0/21 | 2k | RIPE NCC |  FI | 20th Oct 2010 |
| 46.17.218.0/23 | 512 | RIPE NCC |  RS | 21st Oct 2010 |
| 46.173.20.0/24 | 256 | RIPE NCC | RU | 20th Jan 2011 |
| 46.173.30.0/23 | 512 | RIPE NCC | US | 20th Jan 2011 |
| 46.174.128.0/23 | 512 | RIPE NCC | NL | 29th Dec 2010 |
| 46.174.130.0/23 | 512 | RIPE NCC |  LU | 29th Dec 2010 |
| 46.174.133.0/24 | 256 | RIPE NCC | NL | 29th Dec 2010 |
| 46.174.134.0/24 | 256 | RIPE NCC | DE | 29th Dec 2010 |