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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.137.44.0/22 | 1k | RIPE NCC |  ES | 3rd Feb 2016 |
| 185.137.96.0/24 | 256 | RIPE NCC |  FR | 6th Feb 2023 |
| 185.137.99.0/24 | 256 | RIPE NCC |  EE | 7th Feb 2023 |
| 185.138.0.0/22 | 1k | RIPE NCC |  GB | 9th Feb 2016 |
| 185.138.12.0/22 | 1k | RIPE NCC |  AZ | 9th Feb 2016 |
| 185.138.164.0/24 | 256 | RIPE NCC |  MD | 29th Jun 2021 |
| 185.138.192.0/22 | 1k | RIPE NCC |  US | 15th Feb 2016 |
| 185.138.24.0/22 | 1k | RIPE NCC |  DE | 9th Feb 2016 |
| 185.138.60.0/22 | 1k | RIPE NCC |  IT | 10th Feb 2016 |
| 185.138.96.0/22 | 1k | RIPE NCC |  BE | 11th Feb 2016 |
| 185.139.144.0/22 | 1k | RIPE NCC | GB | 18th Feb 2016 |
| 185.139.180.0/24 | 256 | RIPE NCC | IT | 19th Feb 2016 |
| 185.139.184.0/22 | 1k | RIPE NCC |  CH | 19th Feb 2016 |
| 185.139.218.0/23 | 512 | RIPE NCC |  CZ | 22nd Feb 2016 |
| 185.139.72.0/22 | 1k | RIPE NCC | DE | 18th Feb 2016 |
| 185.139.84.0/22 | 1k | RIPE NCC |  CA | 18th Feb 2016 |
| 185.139.96.0/22 | 1k | RIPE NCC | DE | 18th Feb 2016 |
| 185.14.152.0/22 | 1k | RIPE NCC | GB | 31st Dec 2012 |
| 185.14.192.0/22 | 1k | RIPE NCC |  UA | 4th Jan 2013 |
| 185.14.99.0/24 | 256 | RIPE NCC |  MQ | 9th Jun 2021 |
| 185.140.144.0/22 | 1k | RIPE NCC | GB | 26th Feb 2016 |
| 185.140.36.0/22 | 1k | RIPE NCC |  SE | 23rd Feb 2016 |
| 185.140.88.0/22 | 1k | RIPE NCC | CH | 24th Feb 2016 |
| 185.140.96.0/22 | 1k | RIPE NCC | SE | 24th Feb 2016 |
| 185.141.117.0/24 | 256 | RIPE NCC | GB | 2nd Mar 2016 |
| 185.141.118.0/24 | 256 | RIPE NCC | GB | 2nd Mar 2016 |
| 185.141.148.0/22 | 1k | RIPE NCC | DE | 3rd Mar 2016 |
| 185.141.244.0/22 | 1k | RIPE NCC |  IR | 4th Mar 2016 |
| 185.141.44.0/22 | 1k | RIPE NCC | ES | 1st Mar 2016 |
| 185.142.0.0/22 | 1k | RIPE NCC |  NL | 4th Mar 2016 |
| 185.142.108.0/22 | 1k | RIPE NCC | DE | 9th Mar 2016 |
| 185.142.128.0/24 | 256 | RIPE NCC |  RU | 20th Nov 2023 |
| 185.142.129.0/24 | 256 | RIPE NCC | RU | 20th Nov 2023 |
| 185.142.164.0/22 | 1k | RIPE NCC |  IL | 9th Mar 2016 |
| 185.142.204.0/22 | 1k | RIPE NCC |  PL | 10th Mar 2016 |
| 185.142.244.0/22 | 1k | RIPE NCC | IT | 11th Mar 2016 |
| 185.142.4.0/22 | 1k | RIPE NCC | US | 4th Mar 2016 |
| 185.142.96.0/23 | 512 | RIPE NCC | RU | 23rd Feb 2018 |
| 185.142.98.0/24 | 256 | RIPE NCC | RU | 23rd Feb 2018 |
| 185.143.120.0/23 | 512 | RIPE NCC |  RS | 15th Mar 2016 |
| 185.143.132.0/22 | 1k | RIPE NCC | SE | 15th Mar 2016 |
| 185.143.188.0/22 | 1k | RIPE NCC | BE | 16th Mar 2016 |
| 185.143.239.0/24 | 256 | RIPE NCC |  AE | 8th Apr 2025 |
| 185.143.244.0/22 | 1k | RIPE NCC | FR | 17th Mar 2016 |
| 185.143.248.0/22 | 1k | RIPE NCC |  GG | 17th Mar 2016 |
| 185.143.64.0/22 | 1k | RIPE NCC |  OM | 14th Jan 2019 |
| 185.143.84.0/22 | 1k | RIPE NCC | GB | 14th Mar 2016 |
| 185.144.108.0/22 | 1k | RIPE NCC | GB | 23rd Mar 2016 |
| 185.144.130.0/23 | 512 | RIPE NCC |  NO | 23rd Mar 2016 |
| 185.144.140.0/22 | 1k | RIPE NCC | GB | 23rd Mar 2016 |