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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
25,269 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 45.12.108.0/22 | 1k | RIPE NCC |  CY | 1st May 2019 |
| 45.12.120.0/22 | 1k | RIPE NCC |  CH | 1st May 2019 |
| 45.12.128.0/22 | 1k | RIPE NCC | CY | 1st May 2019 |
| 45.12.136.0/22 | 1k | RIPE NCC | CY | 1st May 2019 |
| 45.12.152.0/22 | 1k | RIPE NCC |  ES | 1st May 2019 |
| 45.12.160.0/22 | 1k | RIPE NCC |  AT | 1st May 2019 |
| 45.12.188.0/22 | 1k | RIPE NCC |  GB | 2nd May 2019 |
| 45.12.20.0/22 | 1k | RIPE NCC | GB | 30th Apr 2019 |
| 45.12.232.0/22 | 1k | RIPE NCC | AT | 2nd May 2019 |
| 45.12.46.0/23 | 512 | RIPE NCC | AT | 30th Apr 2019 |
| 45.12.92.0/22 | 1k | RIPE NCC |  DE | 1st May 2019 |
| 45.120.220.0/22 | 1k | RIPE NCC | ES | 23rd Jun 2015 |
| 45.128.164.0/22 | 1k | RIPE NCC | AT | 12th Jul 2019 |
| 45.128.192.0/22 | 1k | RIPE NCC |  SE | 12th Jul 2019 |
| 45.128.224.0/22 | 1k | RIPE NCC | DE | 12th Jul 2019 |
| 45.128.252.0/22 | 1k | RIPE NCC | DE | 12th Jul 2019 |
| 45.128.28.0/22 | 1k | RIPE NCC | AT | 11th Jul 2019 |
| 45.128.72.0/22 | 1k | RIPE NCC | CY | 11th Jul 2019 |
| 45.129.188.0/22 | 1k | RIPE NCC | SE | 16th Jul 2019 |
| 45.129.28.0/22 | 1k | RIPE NCC | AT | 15th Jul 2019 |
| 45.129.75.0/24 | 256 | RIPE NCC |  NO | 13th Oct 2025 |
| 45.129.85.0/24 | 256 | RIPE NCC |  BG | 15th Jul 2019 |
| 45.129.93.0/24 | 256 | RIPE NCC | DE | 15th Jul 2019 |
| 45.13.138.0/23 | 512 | RIPE NCC |  SK | 3rd May 2019 |
| 45.13.170.0/24 | 256 | RIPE NCC | ES | 6th May 2019 |
| 45.13.204.0/22 | 1k | RIPE NCC | CH | 7th May 2019 |
| 45.13.216.0/22 | 1k | RIPE NCC | DE | 7th May 2019 |
| 45.13.244.0/22 | 1k | RIPE NCC | AT | 7th May 2019 |
| 45.13.25.0/24 | 256 | RIPE NCC |  RO | 7th Mar 2023 |
| 45.13.26.0/24 | 256 | RIPE NCC |  RS | 7th Mar 2023 |
| 45.13.44.0/22 | 1k | RIPE NCC |  FR | 3rd May 2019 |
| 45.130.168.0/22 | 1k | RIPE NCC |  RU | 18th Jul 2019 |
| 45.130.180.0/22 | 1k | RIPE NCC | DE | 18th Jul 2019 |
| 45.130.204.0/22 | 1k | RIPE NCC | AT | 18th Jul 2019 |
| 45.130.212.0/22 | 1k | RIPE NCC | RU | 18th Jul 2019 |
| 45.130.216.0/22 | 1k | RIPE NCC |  NL | 18th Jul 2019 |
| 45.130.232.0/22 | 1k | RIPE NCC | DE | 18th Jul 2019 |
| 45.130.72.0/22 | 1k | RIPE NCC | AT | 17th Jul 2019 |
| 45.130.96.0/22 | 1k | RIPE NCC |  PS | 17th Jul 2019 |
| 45.131.128.0/22 | 1k | RIPE NCC | RO | 19th Jul 2019 |
| 45.131.140.0/22 | 1k | RIPE NCC |  OM | 19th Jul 2019 |
| 45.131.200.0/22 | 1k | RIPE NCC | NL | 22nd Jul 2019 |
| 45.131.232.0/22 | 1k | RIPE NCC | DE | 22nd Jul 2019 |
| 45.131.24.0/22 | 1k | RIPE NCC | AT | 18th Jul 2019 |
| 45.132.188.0/22 | 1k | RIPE NCC |  EE | 23rd Jul 2019 |
| 45.132.228.0/22 | 1k | RIPE NCC | GB | 24th Jul 2019 |
| 45.132.33.0/24 | 256 | RIPE NCC |  US | 21st Apr 2020 |
| 45.132.4.0/22 | 1k | RIPE NCC | NL | 22nd Jul 2019 |
| 45.132.52.0/22 | 1k | RIPE NCC | DE | 22nd Jul 2019 |
| 45.133.144.0/22 | 1k | RIPE NCC |  IT | 25th Jul 2019 |