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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 193.202.56.0/22 | 1k | RIPE NCC |  CH | 12th Oct 1993 |
| 193.202.60.0/23 | 512 | RIPE NCC | CH | 12th Oct 1993 |
| 193.202.62.0/23 | 512 | RIPE NCC |  GB | 22nd Nov 1993 |
| 193.202.77.0/24 | 256 | RIPE NCC |  FR | 9th Sept 1993 |
| 193.202.78.0/23 | 512 | RIPE NCC | FR | 9th Sept 1993 |
| 193.203.114.0/23 | 512 | RIPE NCC |  RO | 3rd Jun 2008 |
| 193.203.192.0/23 | 512 | RIPE NCC | GB | 31st Oct 2005 |
| 193.203.202.0/24 | 256 | RIPE NCC |  MD | 3rd Nov 2005 |
| 193.203.212.0/23 | 512 | RIPE NCC | FR | 8th Nov 2005 |
| 193.203.23.0/24 | 256 | RIPE NCC |  RS | 24th Nov 1994 |
| 193.203.236.0/23 | 512 | RIPE NCC |  UA | 28th Jan 2000 |
| 193.203.255.0/24 | 256 | RIPE NCC | GB | 8th Feb 2000 |
| 193.203.4.0/24 | 256 | RIPE NCC |  IE | 18th Nov 2019 |
| 193.218.105.0/24 | 256 | RIPE NCC |  TR | 18th Nov 2019 |
| 193.218.106.0/23 | 512 | RIPE NCC |  GR | 1st Dec 1994 |
| 193.218.108.0/22 | 1k | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.121.0/24 | 256 | RIPE NCC | TR | 18th Nov 2019 |
| 193.218.123.0/24 | 256 | RIPE NCC |  MC | 19th Nov 2019 |
| 193.218.128.0/22 | 1k | RIPE NCC |  NO | 8th Dec 2006 |
| 193.218.184.0/23 | 512 | RIPE NCC |  DE | 1st Apr 2010 |
| 193.218.2.0/23 | 512 | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.205.0/26 | 64 | RIPE NCC | CH | 19th Nov 2007 |
| 193.218.205.128/26 | 64 | RIPE NCC |  CY | 14th Sept 2012 |
| 193.218.205.192/27 | 32 | RIPE NCC | CY | 14th Sept 2012 |
| 193.218.205.64/26 | 64 | RIPE NCC | CY | 14th Sept 2012 |
| 193.218.207.128/25 | 128 | RIPE NCC |  IL | 9th Jan 2011 |
| 193.218.207.16/28 | 16 | RIPE NCC | CH | 26th Jan 2011 |
| 193.218.207.32/27 | 32 | RIPE NCC | CH | 26th Jan 2011 |
| 193.218.207.80/28 | 16 | RIPE NCC | CY | 14th Sept 2012 |
| 193.218.207.96/27 | 32 | RIPE NCC | CY | 14th Sept 2012 |
| 193.218.4.0/24 | 256 | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.41.0/24 | 256 | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.42.0/24 | 256 | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.43.0/24 | 256 | RIPE NCC | TR | 18th Nov 2019 |
| 193.218.5.0/24 | 256 | RIPE NCC | GR | 6th Mar 1998 |
| 193.218.6.0/24 | 256 | RIPE NCC | GR | 6th Mar 1998 |
| 193.218.72.0/24 | 256 | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.73.0/24 | 256 | RIPE NCC | DE | 1st Dec 1994 |
| 193.218.74.0/23 | 512 | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.76.0/22 | 1k | RIPE NCC | GR | 1st Dec 1994 |
| 193.218.82.0/23 | 512 | RIPE NCC | FR | 16th Oct 2019 |
| 193.219.101.0/24 | 256 | RIPE NCC | GB | 19th Nov 2019 |
| 193.219.103.0/24 | 256 | RIPE NCC |  ES | 27th Sept 2006 |
| 193.219.108.0/24 | 256 | RIPE NCC | GB | 27th Sept 2006 |
| 193.219.113.0/24 | 256 | RIPE NCC | DE | 29th Sept 2006 |
| 193.219.116.0/24 | 256 | RIPE NCC |  NL | 29th Sept 2006 |
| 193.219.122.0/24 | 256 | RIPE NCC |  IT | 16th Dec 2024 |
| 193.219.126.0/24 | 256 | RIPE NCC |  PL | 2nd Oct 2006 |
| 193.219.16.0/21 | 2k | RIPE NCC |  DK | 5th Jan 1998 |
| 193.219.24.0/22 | 1k | RIPE NCC | DK | 5th Jan 1998 |