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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,075 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.116.100.0/22 | 1k | RIPE NCC |  US | 8th Sept 2015 |
| 185.116.113.0/24 | 256 | RIPE NCC |  CH | 10th Jan 2024 |
| 185.116.116.0/24 | 256 | RIPE NCC |  TR | 21st Feb 2020 |
| 185.116.117.0/24 | 256 | RIPE NCC |  DE | 26th Feb 2020 |
| 185.116.136.0/22 | 1k | RIPE NCC |  PL | 9th Sept 2015 |
| 185.116.188.0/22 | 1k | RIPE NCC |  DK | 10th Sept 2015 |
| 185.116.233.0/24 | 256 | RIPE NCC | US | 10th Sept 2015 |
| 185.116.64.0/22 | 1k | RIPE NCC |  IE | 7th Sept 2015 |
| 185.117.156.0/22 | 1k | RIPE NCC |  RU | 16th Sept 2015 |
| 185.117.160.0/22 | 1k | RIPE NCC | DE | 16th Sept 2015 |
| 185.117.172.0/22 | 1k | RIPE NCC |  IQ | 16th Sept 2015 |
| 185.117.20.0/22 | 1k | RIPE NCC |  AT | 11th Sept 2015 |
| 185.117.200.0/22 | 1k | RIPE NCC |  GB | 17th Sept 2015 |
| 185.117.227.0/24 | 256 | RIPE NCC | CH | 13th Mar 2020 |
| 185.117.232.0/22 | 1k | RIPE NCC | RU | 17th Sept 2015 |
| 185.117.24.0/22 | 1k | RIPE NCC |  NL | 11th Sept 2015 |
| 185.117.4.0/22 | 1k | RIPE NCC |  AU | 11th Sept 2015 |
| 185.118.100.0/22 | 1k | RIPE NCC |  LU | 22nd Sept 2015 |
| 185.118.117.0/24 | 256 | RIPE NCC | AT | 10th Jan 2024 |
| 185.118.126.0/24 | 256 | RIPE NCC | RU | 13th Mar 2020 |
| 185.118.140.0/24 | 256 | RIPE NCC | TR | 23rd Sept 2015 |
| 185.118.160.0/22 | 1k | RIPE NCC |  EE | 23rd Sept 2015 |
| 185.118.164.0/22 | 1k | RIPE NCC | RU | 23rd Sept 2015 |
| 185.118.184.0/22 | 1k | RIPE NCC |  IT | 24th Sept 2015 |
| 185.118.220.0/22 | 1k | RIPE NCC |  LB | 24th Sept 2015 |
| 185.118.24.0/22 | 1k | RIPE NCC | LB | 21st Sept 2015 |
| 185.118.88.0/22 | 1k | RIPE NCC |  CY | 21st Sept 2015 |
| 185.118.96.0/22 | 1k | RIPE NCC | IQ | 22nd Sept 2015 |
| 185.119.172.0/22 | 1k | RIPE NCC | DE | 1st Oct 2015 |
| 185.119.196.0/24 | 256 | RIPE NCC |  MD | 7th Mar 2023 |
| 185.119.197.0/24 | 256 | RIPE NCC | TR | 7th Mar 2023 |
| 185.119.198.0/24 | 256 | RIPE NCC | DE | 7th Mar 2023 |
| 185.119.199.0/24 | 256 | RIPE NCC |  IR | 7th Mar 2023 |
| 185.12.232.0/22 | 1k | RIPE NCC | GB | 11th Dec 2012 |
| 185.12.48.0/22 | 1k | RIPE NCC |  FR | 4th Dec 2012 |
| 185.12.52.0/22 | 1k | RIPE NCC | RU | 4th Dec 2012 |
| 185.12.80.0/22 | 1k | RIPE NCC | IE | 5th Dec 2012 |
| 185.120.116.0/22 | 1k | RIPE NCC | NL | 8th Oct 2015 |
| 185.120.120.0/22 | 1k | RIPE NCC | IR | 8th Oct 2015 |
| 185.120.140.0/24 | 256 | RIPE NCC | IQ | 29th Jul 2020 |
| 185.120.156.0/22 | 1k | RIPE NCC | DE | 9th Oct 2015 |
| 185.120.20.0/22 | 1k | RIPE NCC | AT | 6th Oct 2015 |
| 185.120.252.0/22 | 1k | RIPE NCC |  ES | 9th Oct 2015 |
| 185.120.4.0/22 | 1k | RIPE NCC | AT | 6th Oct 2015 |
| 185.120.96.0/22 | 1k | RIPE NCC |  GI | 8th Oct 2015 |
| 185.121.144.0/22 | 1k | RIPE NCC | GB | 14th Oct 2015 |
| 185.121.164.0/22 | 1k | RIPE NCC | FR | 15th Oct 2015 |
| 185.121.188.0/22 | 1k | RIPE NCC | NL | 15th Oct 2015 |
| 185.121.212.0/22 | 1k | RIPE NCC | DE | 16th Oct 2015 |
| 185.121.220.0/22 | 1k | RIPE NCC | GB | 16th Oct 2015 |