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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.71.248.0/22 | 1k | RIPE NCC |  DE | 2nd Oct 2014 |
| 185.72.103.0/24 | 256 | RIPE NCC |  US | 17th Jan 2025 |
| 185.72.124.0/22 | 1k | RIPE NCC |  NL | 7th Oct 2014 |
| 185.72.128.0/22 | 1k | RIPE NCC |  SE | 7th Oct 2014 |
| 185.72.156.0/22 | 1k | RIPE NCC |  PL | 8th Oct 2014 |
| 185.72.180.0/22 | 1k | RIPE NCC | NL | 8th Oct 2014 |
| 185.72.248.0/22 | 1k | RIPE NCC |  FR | 13th Oct 2014 |
| 185.72.48.0/22 | 1k | RIPE NCC |  UA | 3rd Oct 2014 |
| 185.73.144.0/22 | 1k | RIPE NCC |  HR | 24th Jan 2018 |
| 185.73.236.0/22 | 1k | RIPE NCC |  BG | 21st Oct 2014 |
| 185.73.87.0/24 | 256 | RIPE NCC |  UZ | 23rd Jun 2025 |
| 185.74.12.0/22 | 1k | RIPE NCC | DE | 22nd Oct 2014 |
| 185.74.168.0/22 | 1k | ARIN | US | 4th Apr 2022 |
| 185.74.176.0/22 | 1k | RIPE NCC |  GB | 24th Oct 2014 |
| 185.74.220.0/24 | 256 | RIPE NCC |  FI | 26th Sept 2022 |
| 185.74.28.0/22 | 1k | RIPE NCC |  CH | 22nd Oct 2014 |
| 185.74.92.0/22 | 1k | RIPE NCC |  GE | 23rd Oct 2014 |
| 185.75.100.0/22 | 1k | RIPE NCC | US | 30th Oct 2014 |
| 185.75.112.0/22 | 1k | RIPE NCC | NL | 30th Oct 2014 |
| 185.75.188.0/24 | 256 | RIPE NCC |  RU | 3rd Nov 2014 |
| 185.75.190.0/24 | 256 | RIPE NCC | RU | 3rd Nov 2014 |
| 185.75.191.0/24 | 256 | RIPE NCC | RU | 3rd Nov 2014 |
| 185.75.200.0/22 | 1k | RIPE NCC |  ES | 3rd Nov 2014 |
| 185.75.228.0/22 | 1k | RIPE NCC | DE | 4th Nov 2014 |
| 185.75.24.0/22 | 1k | RIPE NCC | DE | 28th Oct 2014 |
| 185.76.116.0/22 | 1k | RIPE NCC | DE | 10th Nov 2014 |
| 185.76.172.0/22 | 1k | RIPE NCC | DE | 11th Nov 2014 |
| 185.76.184.0/22 | 1k | RIPE NCC | GB | 11th Nov 2014 |
| 185.76.196.0/22 | 1k | RIPE NCC |  TR | 12th Nov 2014 |
| 185.77.0.0/24 | 256 | RIPE NCC | CH | 13th Nov 2014 |
| 185.77.112.0/22 | 1k | RIPE NCC | FR | 18th Nov 2014 |
| 185.77.152.0/22 | 1k | RIPE NCC | GB | 19th Nov 2014 |
| 185.77.16.0/22 | 1k | RIPE NCC | RU | 14th Nov 2014 |
| 185.77.21.0/24 | 256 | RIPE NCC |  IR | 30th Apr 2025 |
| 185.77.22.0/24 | 256 | RIPE NCC | DE | 30th Apr 2025 |
| 185.77.224.0/22 | 1k | RIPE NCC | US | 4th Jul 2019 |
| 185.77.23.0/24 | 256 | RIPE NCC | DE | 30th Apr 2025 |
| 185.77.231.0/24 | 256 | RIPE NCC | RU | 20th Nov 2014 |
| 185.77.4.0/23 | 512 | ARIN | US | 13th Feb 2020 |
| 185.78.108.0/22 | 1k | RIPE NCC | RU | 24th Nov 2014 |
| 185.78.196.0/22 | 1k | RIPE NCC | NL | 25th Nov 2014 |
| 185.78.56.0/22 | 1k | RIPE NCC |  CZ | 21st Nov 2014 |
| 185.79.124.0/24 | 256 | RIPE NCC | DE | 1st Dec 2014 |
| 185.79.126.0/23 | 512 | RIPE NCC | DE | 1st Dec 2014 |
| 185.79.16.0/24 | 256 | RIPE NCC | IR | 27th Jun 2025 |
| 185.79.160.0/22 | 1k | RIPE NCC |  IE | 2nd Dec 2014 |
| 185.79.176.0/22 | 1k | RIPE NCC | GB | 2nd Dec 2014 |
| 185.79.80.0/22 | 1k | RIPE NCC | NL | 1st Dec 2014 |
| 185.79.84.0/22 | 1k | RIPE NCC |  NO | 1st Dec 2014 |
| 185.79.92.0/22 | 1k | RIPE NCC |  RO | 1st Dec 2014 |