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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,702 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 91.244.182.0/24 | 256 | RIPE NCC |  PL | 12th Nov 2019 |
| 91.244.226.0/24 | 256 | RIPE NCC |  SK | 28th Jul 2025 |
| 91.244.240.0/23 | 512 | RIPE NCC |  RU | 17th Aug 2012 |
| 91.244.68.0/24 | 256 | RIPE NCC |  NL | 26th Sept 2022 |
| 91.245.195.0/24 | 256 | RIPE NCC |  GR | 22nd Aug 2012 |
| 91.245.209.0/24 | 256 | RIPE NCC | PL | 22nd Aug 2012 |
| 91.245.212.0/24 | 256 | RIPE NCC |  GB | 22nd Aug 2012 |
| 91.245.219.0/24 | 256 | RIPE NCC | PL | 22nd Aug 2012 |
| 91.245.222.0/24 | 256 | RIPE NCC |  CY | 22nd Aug 2012 |
| 91.246.30.0/24 | 256 | RIPE NCC |  RO | 21st Feb 2023 |
| 91.246.40.0/24 | 256 | RIPE NCC | NL | 18th Oct 2021 |
| 91.246.55.0/24 | 256 | RIPE NCC |  SE | 19th Oct 2021 |
| 91.247.73.0/24 | 256 | RIPE NCC | GB | 30th Aug 2012 |
| 91.250.108.0/22 | 1k | RIPE NCC |  DE | 14th Sept 2012 |
| 91.250.243.0/24 | 256 | RIPE NCC | PL | 14th Sept 2012 |
| 91.85.0.0/19 | 8.2k | APNIC |  SG | 31st Jul 2006 |
| 91.90.168.0/23 | 512 | RIPE NCC |  IL | 19th Sept 2006 |
| 91.92.112.0/23 | 512 | RIPE NCC |  GE | 15th Aug 2006 |
| 91.92.16.0/24 | 256 | RIPE NCC |  BG | 15th Aug 2006 |
| 91.92.160.0/23 | 512 | RIPE NCC | GB | 15th Aug 2006 |
| 91.92.172.0/22 | 1k | RIPE NCC |  IR | 15th Aug 2006 |
| 91.92.196.0/24 | 256 | RIPE NCC | GB | 15th Aug 2006 |
| 91.92.21.0/24 | 256 | RIPE NCC | BG | 15th Aug 2006 |
| 91.92.220.0/22 | 1k | RIPE NCC | IR | 15th Aug 2006 |
| 91.92.26.0/24 | 256 | RIPE NCC | BG | 15th Aug 2006 |
| 91.92.60.0/24 | 256 | RIPE NCC | BG | 15th Aug 2006 |
| 92.0.0.0/14 | 262k | RIPE NCC | SE | 28th Jun 2007 |
| 92.114.104.0/23 | 512 | RIPE NCC |  AT | 15th Oct 2007 |
| 92.114.112.0/20 | 4.1k | RIPE NCC |  ES | 15th Oct 2007 |
| 92.114.38.0/24 | 256 | RIPE NCC | RO | 15th Oct 2007 |
| 92.114.6.0/24 | 256 | RIPE NCC | ES | 15th Oct 2007 |
| 92.114.64.0/20 | 4.1k | RIPE NCC | IR | 15th Oct 2007 |
| 92.114.82.0/24 | 256 | RIPE NCC | RO | 15th Oct 2007 |
| 92.118.196.0/22 | 1k | RIPE NCC | RU | 7th Mar 2019 |
| 92.118.214.0/23 | 512 | RIPE NCC | NL | 7th Mar 2019 |
| 92.118.236.0/22 | 1k | RIPE NCC | CY | 7th Mar 2019 |
| 92.118.32.0/22 | 1k | RIPE NCC |  IE | 1st Mar 2019 |
| 92.118.4.0/22 | 1k | RIPE NCC |  FI | 1st Mar 2019 |
| 92.118.40.0/22 | 1k | RIPE NCC | RO | 4th Mar 2019 |
| 92.118.48.0/22 | 1k | RIPE NCC | DE | 4th Mar 2019 |
| 92.118.52.0/22 | 1k | RIPE NCC | DE | 4th Mar 2019 |
| 92.118.60.0/22 | 1k | RIPE NCC | DE | 4th Mar 2019 |
| 92.118.88.0/22 | 1k | RIPE NCC | RU | 5th Mar 2019 |
| 92.119.148.0/22 | 1k | RIPE NCC | AT | 12th Mar 2019 |
| 92.119.172.0/22 | 1k | RIPE NCC | GB | 12th Mar 2019 |
| 92.119.200.0/22 | 1k | RIPE NCC | RU | 12th Mar 2019 |
| 92.119.204.0/22 | 1k | RIPE NCC |  CH | 12th Mar 2019 |
| 92.119.248.0/22 | 1k | RIPE NCC |  UZ | 13th Mar 2019 |
| 92.119.37.0/24 | 256 | RIPE NCC | CH | 7th Jun 2021 |
| 92.119.39.0/24 | 256 | RIPE NCC | IE | 7th Jun 2021 |