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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.198.220.0/22 | 1k | RIPE NCC |  DE | 11th Apr 2017 |
| 185.198.236.0/22 | 1k | RIPE NCC |  FR | 11th Apr 2017 |
| 185.198.57.0/24 | 256 | RIPE NCC |  NL | 6th Apr 2017 |
| 185.198.71.0/24 | 256 | RIPE NCC | DE | 1st Jul 2021 |
| 185.198.96.0/22 | 1k | RIPE NCC |  IT | 7th Apr 2017 |
| 185.199.132.0/22 | 1k | RIPE NCC | DE | 18th Apr 2017 |
| 185.199.192.0/22 | 1k | RIPE NCC | DE | 19th Apr 2017 |
| 185.199.20.0/22 | 1k | RIPE NCC |  GB | 12th Apr 2017 |
| 185.199.40.0/22 | 1k | RIPE NCC | FR | 12th Apr 2017 |
| 185.199.64.0/22 | 1k | RIPE NCC |  IR | 13th Apr 2017 |
| 185.199.72.0/22 | 1k | RIPE NCC | GB | 13th Apr 2017 |
| 185.2.120.0/22 | 1k | RIPE NCC | DE | 18th Sept 2012 |
| 185.2.128.0/22 | 1k | RIPE NCC | DE | 18th Sept 2012 |
| 185.2.136.0/22 | 1k | RIPE NCC |  US | 18th Sept 2012 |
| 185.2.188.0/22 | 1k | RIPE NCC |  MK | 18th Sept 2012 |
| 185.2.72.0/22 | 1k | RIPE NCC |  RU | 17th Sept 2012 |
| 185.2.92.0/22 | 1k | RIPE NCC |  BE | 17th Sept 2012 |
| 185.20.104.0/22 | 1k | RIPE NCC |  NO | 5th Mar 2013 |
| 185.20.2.0/24 | 256 | RIPE NCC | GB | 17th Jul 2020 |
| 185.20.20.0/22 | 1k | RIPE NCC |  PL | 28th Feb 2013 |
| 185.20.212.0/22 | 1k | RIPE NCC |  CY | 8th Mar 2013 |
| 185.20.220.0/22 | 1k | ARIN | US | 11th May 2017 |
| 185.20.244.0/22 | 1k | RIPE NCC | NO | 8th Mar 2013 |
| 185.20.48.0/22 | 1k | RIPE NCC | DE | 1st Mar 2013 |
| 185.20.80.0/24 | 256 | RIPE NCC | RU | 4th Mar 2013 |
| 185.20.81.0/24 | 256 | RIPE NCC | RU | 4th Mar 2013 |
| 185.20.82.0/24 | 256 | RIPE NCC | RU | 4th Mar 2013 |
| 185.20.83.0/24 | 256 | RIPE NCC | RU | 4th Mar 2013 |
| 185.20.92.0/22 | 1k | RIPE NCC |  IE | 4th Mar 2013 |
| 185.200.121.0/24 | 256 | RIPE NCC |  SA | 2nd Oct 2020 |
| 185.200.128.0/22 | 1k | RIPE NCC |  JO | 24th Apr 2017 |
| 185.200.160.0/22 | 1k | RIPE NCC | RU | 24th Apr 2017 |
| 185.200.184.0/22 | 1k | RIPE NCC |  SE | 25th Apr 2017 |
| 185.200.84.0/22 | 1k | RIPE NCC |  KZ | 21st Apr 2017 |
| 185.200.92.0/22 | 1k | RIPE NCC | GB | 21st Apr 2017 |
| 185.201.100.0/22 | 1k | RIPE NCC |  AE | 1st May 2017 |
| 185.201.168.0/24 | 256 | RIPE NCC |  TR | 22nd Jan 2026 |
| 185.201.170.0/24 | 256 | RIPE NCC |  BG | 22nd Jan 2026 |
| 185.201.204.0/22 | 1k | RIPE NCC | SE | 4th May 2017 |
| 185.201.220.0/24 | 256 | RIPE NCC |  LU | 17th Jun 2026 |
| 185.201.221.0/24 | 256 | RIPE NCC | IR | 17th Jun 2026 |
| 185.201.31.0/24 | 256 | RIPE NCC |  HK | 25th Jan 2022 |
| 185.201.96.0/22 | 1k | RIPE NCC | GB | 1st May 2017 |
| 185.202.12.0/22 | 1k | RIPE NCC | RU | 5th May 2017 |
| 185.202.140.0/22 | 1k | RIPE NCC | SA | 9th May 2017 |
| 185.202.150.0/24 | 256 | RIPE NCC |  AT | 9th May 2017 |
| 185.202.232.0/22 | 1k | RIPE NCC | GB | 10th May 2017 |
| 185.202.8.0/22 | 1k | RIPE NCC |  DK | 4th May 2017 |
| 185.202.88.0/22 | 1k | RIPE NCC | GB | 8th May 2017 |
| 185.203.100.0/22 | 1k | RIPE NCC | GB | 12th May 2017 |