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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.242.140.0/22 | 1k | RIPE NCC |  FR | 18th Jan 2018 |
| 185.242.168.0/22 | 1k | RIPE NCC |  BG | 19th Jan 2018 |
| 185.242.187.0/24 | 256 | RIPE NCC | FR | 22nd Feb 2021 |
| 185.242.219.0/24 | 256 | RIPE NCC |  US | 20th Jan 2020 |
| 185.242.84.0/23 | 512 | RIPE NCC |  MD | 18th Jan 2018 |
| 185.242.86.0/24 | 256 | RIPE NCC | MD | 18th Jan 2018 |
| 185.243.131.0/24 | 256 | RIPE NCC |  DE | 26th Feb 2021 |
| 185.243.180.0/22 | 1k | RIPE NCC |  TR | 29th Jan 2018 |
| 185.243.188.0/22 | 1k | RIPE NCC |  NL | 30th Jan 2018 |
| 185.243.220.0/22 | 1k | RIPE NCC |  RU | 30th Jan 2018 |
| 185.243.236.0/22 | 1k | RIPE NCC | BG | 30th Jan 2018 |
| 185.243.248.0/22 | 1k | RIPE NCC | BG | 30th Jan 2018 |
| 185.243.80.0/22 | 1k | RIPE NCC |  GB | 26th Jan 2018 |
| 185.244.120.0/22 | 1k | RIPE NCC | DE | 1st Feb 2018 |
| 185.244.150.0/24 | 256 | RIPE NCC | NL | 2nd Feb 2018 |
| 185.244.176.0/22 | 1k | RIPE NCC |  IQ | 2nd Feb 2018 |
| 185.244.200.0/22 | 1k | RIPE NCC | DE | 2nd Feb 2018 |
| 185.244.225.0/24 | 256 | RIPE NCC | DE | 26th Feb 2021 |
| 185.244.228.0/22 | 1k | RIPE NCC |  ES | 5th Feb 2018 |
| 185.244.238.0/24 | 256 | RIPE NCC | TR | 4th Mar 2021 |
| 185.244.52.0/22 | 1k | RIPE NCC |  IR | 31st Jan 2018 |
| 185.245.108.0/22 | 1k | RIPE NCC |  DK | 9th Feb 2018 |
| 185.245.172.0/22 | 1k | RIPE NCC |  IS | 9th Feb 2018 |
| 185.245.212.0/22 | 1k | RIPE NCC | GB | 12th Feb 2018 |
| 185.245.232.0/22 | 1k | RIPE NCC | GB | 12th Feb 2018 |
| 185.245.72.0/22 | 1k | RIPE NCC | NL | 7th Feb 2018 |
| 185.246.0.0/22 | 1k | RIPE NCC | DE | 13th Feb 2018 |
| 185.246.12.0/22 | 1k | RIPE NCC | ES | 13th Feb 2018 |
| 185.246.212.0/22 | 1k | RIPE NCC | DE | 16th Feb 2018 |
| 185.246.232.0/22 | 1k | RIPE NCC |  LI | 26th Feb 2018 |
| 185.246.56.0/22 | 1k | RIPE NCC | ES | 14th Feb 2018 |
| 185.247.104.0/22 | 1k | RIPE NCC | FR | 1st Mar 2018 |
| 185.247.126.0/24 | 256 | RIPE NCC | ES | 1st Mar 2018 |
| 185.247.232.0/22 | 1k | RIPE NCC | ES | 5th Mar 2018 |
| 185.248.144.0/24 | 256 | RIPE NCC | MD | 29th Nov 2022 |
| 185.248.145.0/24 | 256 | RIPE NCC | FR | 29th Nov 2022 |
| 185.248.147.0/24 | 256 | RIPE NCC |  PL | 30th Nov 2022 |
| 185.248.26.0/24 | 256 | RIPE NCC |  KG | 27th Jan 2026 |
| 185.248.60.0/22 | 1k | RIPE NCC |  IE | 6th Mar 2018 |
| 185.248.68.0/22 | 1k | RIPE NCC | NL | 6th Mar 2018 |
| 185.249.0.0/22 | 1k | RIPE NCC |  RO | 12th Mar 2018 |
| 185.249.152.0/22 | 1k | RIPE NCC |  CY | 14th Mar 2018 |
| 185.249.158.0/24 | 256 | RIPE NCC |  KW | 18th Aug 2023 |
| 185.249.221.0/24 | 256 | RIPE NCC | US | 15th Mar 2018 |
| 185.249.8.0/24 | 256 | RIPE NCC |  UZ | 15th Jan 2025 |
| 185.249.96.0/22 | 1k | RIPE NCC | DE | 14th Mar 2018 |
| 185.25.105.0/24 | 256 | RIPE NCC | ES | 29th Jun 2021 |
| 185.25.152.0/22 | 1k | RIPE NCC | RU | 7th May 2013 |
| 185.25.160.0/22 | 1k | RIPE NCC | NL | 7th May 2013 |
| 185.25.212.0/22 | 1k | RIPE NCC | DK | 10th May 2013 |