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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 193.41.33.0/24 | 256 | RIPE NCC |  LV | 12th Oct 2000 |
| 193.41.34.0/24 | 256 | RIPE NCC |  HU | 14th Nov 2019 |
| 193.41.46.0/24 | 256 | RIPE NCC |  SE | 20th Oct 2000 |
| 193.41.58.0/24 | 256 | RIPE NCC |  DK | 6th Jan 2020 |
| 193.41.70.0/24 | 256 | RIPE NCC | HU | 14th Nov 2019 |
| 193.41.71.0/24 | 256 | RIPE NCC |  FR | 30th Oct 2000 |
| 193.41.80.0/24 | 256 | RIPE NCC |  UA | 2nd Nov 2000 |
| 193.41.81.0/24 | 256 | RIPE NCC |  LT | 7th Nov 2000 |
| 193.41.89.0/24 | 256 | RIPE NCC |  SI | 23rd Nov 2000 |
| 193.41.91.0/24 | 256 | RIPE NCC |  PL | 14th Nov 2019 |
| 193.41.92.0/24 | 256 | RIPE NCC | PL | 14th Nov 2019 |
| 193.42.10.0/24 | 256 | RIPE NCC | FR | 9th Sept 1993 |
| 193.42.104.0/22 | 1k | RIPE NCC | UA | 23rd Oct 2018 |
| 193.42.13.0/24 | 256 | RIPE NCC |  IT | 9th Dec 1993 |
| 193.42.133.0/24 | 256 | RIPE NCC | IT | 9th Mar 1994 |
| 193.42.140.0/23 | 512 | RIPE NCC | IT | 27th May 1994 |
| 193.42.143.0/24 | 256 | RIPE NCC |  ES | 15th Sept 2008 |
| 193.42.144.0/24 | 256 | RIPE NCC |  GB | 16th Sept 2008 |
| 193.42.147.0/24 | 256 | RIPE NCC | PL | 17th Sept 2008 |
| 193.42.155.0/24 | 256 | RIPE NCC |  DE | 18th Sept 2008 |
| 193.42.212.0/24 | 256 | RIPE NCC |  NL | 4th Jan 2005 |
| 193.42.216.0/24 | 256 | RIPE NCC |  TR | 5th Jan 2005 |
| 193.42.28.0/22 | 1k | RIPE NCC | ES | 13th Sept 2018 |
| 193.42.8.0/23 | 512 | RIPE NCC | FR | 9th Sept 1993 |
| 193.43.0.0/26 | 64 | RIPE NCC | FR | 28th Aug 2012 |
| 193.43.0.128/25 | 128 | RIPE NCC | PL | 31st May 2012 |
| 193.43.0.64/27 | 32 | RIPE NCC |  CY | 14th Sept 2012 |
| 193.43.0.96/27 | 32 | RIPE NCC | GB | 11th May 2012 |
| 193.43.1.0/24 | 256 | RIPE NCC | IT | 3rd Feb 1995 |
| 193.43.111.0/24 | 256 | RIPE NCC |  CH | 15th Feb 1995 |
| 193.43.112.0/22 | 1k | RIPE NCC | CH | 15th Feb 1995 |
| 193.43.118.0/23 | 512 | RIPE NCC | DE | 9th Oct 2019 |
| 193.43.125.0/24 | 256 | RIPE NCC |  IE | 16th Dec 2004 |
| 193.43.137.0/24 | 256 | RIPE NCC | IT | 28th Mar 1994 |
| 193.43.142.0/23 | 512 | RIPE NCC |  AT | 9th Oct 2019 |
| 193.43.146.0/23 | 512 | RIPE NCC |  RU | 9th Oct 2019 |
| 193.43.181.0/24 | 256 | RIPE NCC | PL | 10th Dec 2004 |
| 193.43.222.0/23 | 512 | RIPE NCC | UA | 3rd Oct 2005 |
| 193.43.236.0/22 | 1k | RIPE NCC |  BE | 30th Dec 2004 |
| 193.43.25.0/24 | 256 | RIPE NCC | GB | 17th Dec 2004 |
| 193.43.3.0/25 | 128 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.128/27 | 32 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.160/28 | 16 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.176/30 | 4 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.180/30 | 4 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.184/29 | 8 | RIPE NCC | IT | 31st May 1994 |
| 193.43.3.192/26 | 64 | RIPE NCC | IT | 31st May 1994 |
| 193.43.32.0/23 | 512 | RIPE NCC |  CZ | 9th Oct 2019 |
| 193.43.38.0/23 | 512 | RIPE NCC | CH | 10th Oct 1994 |
| 193.43.43.0/24 | 256 | RIPE NCC | DE | 23rd Apr 2021 |