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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.21.100.0/22 | 1k | RIPE NCC |  DE | 14th Mar 2013 |
| 185.21.133.0/24 | 256 | RIPE NCC |  GB | 20th Jul 2020 |
| 185.21.200.0/22 | 1k | RIPE NCC |  NL | 19th Mar 2013 |
| 185.21.44.0/22 | 1k | RIPE NCC |  ES | 12th Mar 2013 |
| 185.21.5.0/24 | 256 | RIPE NCC |  TR | 11th Mar 2013 |
| 185.210.104.0/22 | 1k | RIPE NCC | GB | 27th Jun 2017 |
| 185.210.132.0/22 | 1k | RIPE NCC |  DK | 28th Jun 2017 |
| 185.210.161.0/24 | 256 | RIPE NCC | GB | 6th Nov 2020 |
| 185.210.162.0/24 | 256 | RIPE NCC |  IT | 6th Nov 2020 |
| 185.210.164.0/22 | 1k | RIPE NCC |  IE | 28th Jun 2017 |
| 185.210.212.0/22 | 1k | RIPE NCC | IT | 29th Jun 2017 |
| 185.210.228.0/24 | 256 | RIPE NCC |  IQ | 12th Mar 2026 |
| 185.210.231.0/24 | 256 | RIPE NCC |  UZ | 16th Mar 2026 |
| 185.210.252.0/22 | 1k | RIPE NCC | TR | 30th Jun 2017 |
| 185.210.48.0/22 | 1k | RIPE NCC | IT | 26th Jun 2017 |
| 185.210.52.0/23 | 512 | RIPE NCC | DE | 27th Jun 2017 |
| 185.210.8.0/22 | 1k | RIPE NCC | DE | 23rd Jun 2017 |
| 185.211.104.0/22 | 1k | RIPE NCC |  KW | 4th Jul 2017 |
| 185.211.144.0/22 | 1k | RIPE NCC | DE | 4th Jul 2017 |
| 185.211.34.0/24 | 256 | RIPE NCC | DE | 30th Jun 2017 |
| 185.211.36.0/22 | 1k | RIPE NCC |  SK | 30th Jun 2017 |
| 185.211.84.0/22 | 1k | RIPE NCC |  IR | 3rd Jul 2017 |
| 185.212.117.0/24 | 256 | RIPE NCC |  RU | 7th Sept 2021 |
| 185.212.118.0/24 | 256 | RIPE NCC | DE | 7th Sept 2021 |
| 185.212.132.0/22 | 1k | RIPE NCC |  PL | 12th Jul 2017 |
| 185.212.144.0/22 | 1k | RIPE NCC |  US | 12th Jul 2017 |
| 185.212.176.0/22 | 1k | RIPE NCC | IT | 12th Jul 2017 |
| 185.212.228.0/22 | 1k | RIPE NCC | IE | 13th Jul 2017 |
| 185.212.68.0/24 | 256 | RIPE NCC | DE | 11th Jul 2017 |
| 185.212.74.0/24 | 256 | ARIN |  FR | 12th Aug 2019 |
| 185.213.12.0/22 | 1k | RIPE NCC | NL | 14th Jul 2017 |
| 185.213.123.0/24 | 256 | RIPE NCC |  AZ | 19th Jul 2017 |
| 185.213.180.0/22 | 1k | RIPE NCC |  VG | 19th Jul 2017 |
| 185.213.236.0/22 | 1k | RIPE NCC | DE | 20th Jul 2017 |
| 185.213.28.0/22 | 1k | RIPE NCC | RU | 14th Jul 2017 |
| 185.213.72.0/22 | 1k | RIPE NCC | FR | 17th Jul 2017 |
| 185.213.96.0/22 | 1k | RIPE NCC | DE | 17th Jul 2017 |
| 185.214.248.0/22 | 1k | RIPE NCC |  BG | 26th Jul 2017 |
| 185.214.32.0/22 | 1k | RIPE NCC |  PT | 21st Jul 2017 |
| 185.214.40.0/23 | 512 | RIPE NCC |  RS | 24th Jul 2017 |
| 185.214.42.0/24 | 256 | RIPE NCC | RS | 24th Jul 2017 |
| 185.214.68.0/22 | 1k | RIPE NCC |  AT | 25th Jul 2017 |
| 185.214.80.0/23 | 512 | RIPE NCC | ES | 25th Jul 2017 |
| 185.215.112.0/24 | 256 | RIPE NCC |  CH | 13th Nov 2020 |
| 185.215.113.0/24 | 256 | RIPE NCC |  SC | 13th Nov 2020 |
| 185.215.188.0/22 | 1k | RIPE NCC | DE | 2nd Aug 2017 |
| 185.215.208.0/22 | 1k | RIPE NCC | DE | 2nd Aug 2017 |
| 185.215.212.0/22 | 1k | RIPE NCC | AT | 2nd Aug 2017 |
| 185.215.48.0/22 | 1k | RIPE NCC | US | 27th Jul 2017 |
| 185.215.7.0/24 | 256 | RIPE NCC | CH | 12th Apr 2021 |