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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 185.1.231.0/24 | 256 | RIPE NCC |  IT | 13th Jan 2022 |
| 185.1.232.0/24 | 256 | RIPE NCC |  GB | 8th Feb 2022 |
| 185.1.233.0/24 | 256 | RIPE NCC |  SE | 11th Feb 2022 |
| 185.1.234.0/24 | 256 | RIPE NCC |  SK | 15th Feb 2022 |
| 185.1.235.0/24 | 256 | RIPE NCC |  EE | 17th Feb 2022 |
| 185.1.236.0/24 | 256 | RIPE NCC |  LV | 18th Feb 2022 |
| 185.1.237.0/24 | 256 | RIPE NCC |  ES | 28th Feb 2022 |
| 185.1.238.0/24 | 256 | RIPE NCC |  UA | 17th Mar 2022 |
| 185.1.239.0/24 | 256 | RIPE NCC |  SA | 8th Apr 2022 |
| 185.1.24.0/24 | 256 | RIPE NCC |  HU | 3rd Apr 2014 |
| 185.1.240.0/24 | 256 | RIPE NCC |  NL | 8th Apr 2022 |
| 185.1.241.0/24 | 256 | RIPE NCC |  PS | 6th May 2022 |
| 185.1.243.0/24 | 256 | RIPE NCC |  BE | 24th May 2022 |
| 185.1.244.0/24 | 256 | RIPE NCC |  DE | 14th Jun 2022 |
| 185.1.245.0/24 | 256 | RIPE NCC | DE | 15th Jun 2022 |
| 185.1.246.0/24 | 256 | RIPE NCC | DE | 6th Jul 2022 |
| 185.1.248.0/24 | 256 | RIPE NCC | DE | 12th Aug 2022 |
| 185.1.25.0/24 | 256 | RIPE NCC |  CZ | 30th Apr 2014 |
| 185.1.250.0/24 | 256 | RIPE NCC |  UZ | 2nd Aug 2022 |
| 185.1.252.0/24 | 256 | RIPE NCC | DE | 12th Aug 2022 |
| 185.1.253.0/24 | 256 | RIPE NCC | DE | 12th Aug 2022 |
| 185.1.26.0/24 | 256 | RIPE NCC |  FR | 26th May 2014 |
| 185.1.27.0/24 | 256 | RIPE NCC |  RS | 28th May 2014 |
| 185.1.29.0/24 | 256 | RIPE NCC |  GR | 3rd Jun 2020 |
| 185.1.30.0/24 | 256 | RIPE NCC |  BG | 2nd Sept 2014 |
| 185.1.31.0/24 | 256 | RIPE NCC |  AT | 18th Aug 2014 |
| 185.1.32.0/24 | 256 | RIPE NCC | NL | 5th Nov 2014 |
| 185.1.33.0/24 | 256 | RIPE NCC | GB | 21st Nov 2014 |
| 185.1.34.0/24 | 256 | RIPE NCC | CZ | 9th Dec 2014 |
| 185.1.35.0/24 | 256 | RIPE NCC | DE | 11th Dec 2014 |
| 185.1.36.0/24 | 256 | RIPE NCC |  RO | 3rd Feb 2015 |
| 185.1.37.0/24 | 256 | RIPE NCC |  PL | 28th Jan 2015 |
| 185.1.38.0/24 | 256 | RIPE NCC | FR | 25th Feb 2015 |
| 185.1.39.0/24 | 256 | RIPE NCC | UA | 9th Oct 2015 |
| 185.1.4.0/22 | 1k | RIPE NCC | PL | 29th Oct 2012 |
| 185.1.40.0/24 | 256 | RIPE NCC | BG | 27th Feb 2015 |
| 185.1.41.0/24 | 256 | RIPE NCC |  RU | 13th Mar 2015 |
| 185.1.42.0/24 | 256 | RIPE NCC | PL | 17th Mar 2015 |
| 185.1.43.0/24 | 256 | RIPE NCC | AT | 1st Apr 2015 |
| 185.1.44.0/24 | 256 | RIPE NCC |  ME | 26th May 2015 |
| 185.1.45.0/24 | 256 | RIPE NCC |  MD | 26th May 2015 |
| 185.1.46.0/24 | 256 | RIPE NCC | DE | 30th Jun 2015 |
| 185.1.47.0/24 | 256 | RIPE NCC | DE | 3rd Aug 2015 |
| 185.1.48.0/24 | 256 | RIPE NCC | DE | 3rd Aug 2015 |
| 185.1.50.0/23 | 512 | RIPE NCC | UA | 1st Oct 2015 |
| 185.1.53.0/24 | 256 | RIPE NCC | GB | 13th Oct 2015 |
| 185.1.54.0/24 | 256 | RIPE NCC | DE | 20th Oct 2015 |
| 185.1.55.0/24 | 256 | RIPE NCC |  NO | 21st Dec 2015 |
| 185.1.57.0/24 | 256 | RIPE NCC |  DK | 4th Nov 2015 |
| 185.1.58.0/24 | 256 | RIPE NCC | SA | 2nd Feb 2021 |