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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 194.31.100.0/22 | 1k | RIPE NCC |  DE | 19th Sept 2018 |
| 194.31.109.0/24 | 256 | RIPE NCC |  RU | 28th Nov 2022 |
| 194.31.172.0/24 | 256 | RIPE NCC | RU | 28th Nov 2018 |
| 194.31.200.0/22 | 1k | RIPE NCC | DE | 10th Apr 1995 |
| 194.31.206.0/24 | 256 | RIPE NCC |  FR | 10th Apr 1995 |
| 194.31.234.0/23 | 512 | RIPE NCC | DE | 21st Apr 1995 |
| 194.31.238.0/24 | 256 | RIPE NCC | DE | 22nd Apr 1995 |
| 194.31.239.0/24 | 256 | RIPE NCC |  CH | 21st Nov 2019 |
| 194.31.247.0/24 | 256 | RIPE NCC | CH | 21st Nov 2019 |
| 194.31.250.0/24 | 256 | RIPE NCC |  DK | 20th Feb 2023 |
| 194.31.254.0/24 | 256 | RIPE NCC | CH | 7th Jun 2012 |
| 194.31.3.0/24 | 256 | RIPE NCC | DE | 16th Mar 1995 |
| 194.31.63.0/24 | 256 | RIPE NCC |  HR | 15th Jun 2026 |
| 194.31.80.0/23 | 512 | RIPE NCC | DE | 24th Mar 1995 |
| 194.31.82.0/23 | 512 | RIPE NCC |  GB | 27th Mar 1995 |
| 194.31.88.0/22 | 1k | RIPE NCC | GB | 15th May 2018 |
| 194.32.100.0/22 | 1k | RIPE NCC |  IT | 26th Oct 2018 |
| 194.32.125.0/24 | 256 | RIPE NCC |  SC | 29th Oct 2018 |
| 194.32.160.0/24 | 256 | RIPE NCC |  IE | 30th Sept 2024 |
| 194.32.162.0/24 | 256 | RIPE NCC |  RO | 9th Oct 2023 |
| 194.32.165.0/24 | 256 | RIPE NCC |  SA | 21st Nov 2019 |
| 194.32.196.0/24 | 256 | RIPE NCC | GB | 4th Jan 1994 |
| 194.32.197.0/24 | 256 | RIPE NCC | GB | 3rd Aug 1994 |
| 194.32.198.0/23 | 512 | RIPE NCC | GB | 3rd Aug 1994 |
| 194.32.200.0/24 | 256 | RIPE NCC | GB | 4th Jan 1994 |
| 194.32.201.0/24 | 256 | RIPE NCC | GB | 4th Jan 1994 |
| 194.32.202.0/24 | 256 | RIPE NCC | GB | 4th Jan 1994 |
| 194.32.203.0/24 | 256 | RIPE NCC | SA | 21st Nov 2019 |
| 194.32.210.0/24 | 256 | RIPE NCC |  BG | 1st Oct 2024 |
| 194.32.211.0/24 | 256 | RIPE NCC | IT | 1st Oct 2024 |
| 194.32.221.0/24 | 256 | RIPE NCC | GB | 1st Feb 1994 |
| 194.32.232.0/22 | 1k | RIPE NCC | DE | 29th Oct 2018 |
| 194.32.244.0/22 | 1k | RIPE NCC |  US | 29th Oct 2018 |
| 194.32.64.0/23 | 512 | RIPE NCC | GB | 11th Oct 1993 |
| 194.32.66.0/24 | 256 | RIPE NCC | GB | 11th Oct 1993 |
| 194.32.67.0/24 | 256 | RIPE NCC | GB | 6th Jul 1996 |
| 194.32.82.0/24 | 256 | RIPE NCC | RO | 3rd Nov 1993 |
| 194.33.0.0/21 | 2k | RIPE NCC | GB | 4th May 1994 |
| 194.33.125.0/24 | 256 | RIPE NCC |  IR | 4th Jun 2012 |
| 194.33.126.0/23 | 512 | RIPE NCC | IR | 4th Jun 2012 |
| 194.33.144.0/22 | 1k | RIPE NCC |  NL | 12th May 1995 |
| 194.33.148.0/24 | 256 | RIPE NCC | NL | 12th May 1995 |
| 194.33.149.0/24 | 256 | ARIN | US | 18th Jan 2022 |
| 194.33.176.0/22 | 1k | RIPE NCC | GB | 6th Jan 1994 |
| 194.33.185.0/24 | 256 | RIPE NCC |  PL | 6th Nov 2006 |
| 194.33.24.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.25.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.26.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.27.0/24 | 256 | RIPE NCC | GB | 2nd Dec 1993 |
| 194.33.30.0/24 | 256 | RIPE NCC |  NO | 15th Dec 1993 |