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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through RIPE NCC, largest first.
Unannounced blocks registered through RIPE NCC
25,273 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.93.64.0/19 | 8.2k | RIPE NCC |  FR | 1st Jan 1984 |
| 192.94.111.0/24 | 256 | RIPE NCC |  GB | 22nd Feb 1991 |
| 192.94.112.0/22 | 1k | RIPE NCC | GB | 22nd Feb 1991 |
| 192.94.116.0/23 | 512 | RIPE NCC | GB | 22nd Feb 1991 |
| 192.94.156.0/22 | 1k | RIPE NCC |  DK | 26th Feb 1991 |
| 192.94.160.0/23 | 512 | RIPE NCC | DK | 26th Feb 1991 |
| 192.94.162.0/24 | 256 | RIPE NCC | DK | 26th Feb 1991 |
| 192.94.172.0/24 | 256 | RIPE NCC | GB | 28th Feb 1991 |
| 192.94.175.0/24 | 256 | RIPE NCC | FR | 28th Feb 1991 |
| 192.94.176.0/20 | 4.1k | RIPE NCC | FR | 28th Feb 1991 |
| 192.94.192.0/21 | 2k | RIPE NCC | FR | 28th Feb 1991 |
| 192.94.221.0/24 | 256 | RIPE NCC |  RU | 5th Mar 1991 |
| 192.94.239.0/24 | 256 | RIPE NCC |  AT | 6th Mar 1991 |
| 192.94.57.0/24 | 256 | RIPE NCC | AT | 15th Feb 1991 |
| 192.94.58.0/24 | 256 | RIPE NCC | GB | 15th Feb 1991 |
| 192.94.76.0/24 | 256 | RIPE NCC |  DE | 22nd Feb 1991 |
| 192.94.78.0/24 | 256 | RIPE NCC |  US | 12th Nov 2019 |
| 193.0.129.0/24 | 256 | RIPE NCC | US | 12th Nov 2019 |
| 193.0.144.0/24 | 256 | RIPE NCC |  PL | 27th Apr 2012 |
| 193.0.166.0/23 | 512 | RIPE NCC | RU | 9th Aug 2012 |
| 193.0.184.0/24 | 256 | RIPE NCC | US | 12th Nov 2019 |
| 193.0.198.0/24 | 256 | RIPE NCC | DE | 7th Dec 2020 |
| 193.0.212.0/24 | 256 | RIPE NCC | US | 12th Nov 2019 |
| 193.0.229.0/24 | 256 | RIPE NCC |  LV | 12th Nov 2019 |
| 193.0.238.0/24 | 256 | RIPE NCC | DE | 6th Aug 2002 |
| 193.0.249.0/24 | 256 | RIPE NCC | US | 15th Aug 2002 |
| 193.0.250.0/24 | 256 | RIPE NCC | DE | 16th Aug 2002 |
| 193.0.32.0/20 | 4.1k | RIPE NCC |  CH | 8th Jan 1998 |
| 193.0.48.0/21 | 2k | RIPE NCC | CH | 8th Jan 1998 |
| 193.100.228.0/22 | 1k | RIPE NCC |  SE | 15th Feb 1994 |
| 193.100.254.0/24 | 256 | RIPE NCC | DE | 15th Feb 1994 |
| 193.100.255.0/24 | 256 | RIPE NCC | DE | 15th Feb 1994 |
| 193.101.144.0/22 | 1k | RIPE NCC | DE | 15th Feb 1994 |
| 193.101.176.0/23 | 512 | RIPE NCC | DE | 15th Feb 1994 |
| 193.101.178.0/24 | 256 | RIPE NCC | DE | 15th Feb 1994 |
| 193.101.192.0/22 | 1k | RIPE NCC | DE | 15th Feb 1994 |
| 193.101.67.0/24 | 256 | RIPE NCC | DE | 15th Feb 1994 |
| 193.102.152.0/24 | 256 | RIPE NCC | DE | 15th May 1994 |
| 193.102.226.0/24 | 256 | RIPE NCC | DE | 15th May 1994 |
| 193.102.77.0/24 | 256 | RIPE NCC | DE | 15th May 1994 |
| 193.102.98.0/24 | 256 | RIPE NCC | DE | 15th May 1994 |
| 193.103.159.0/24 | 256 | RIPE NCC | DE | 27th Sept 1994 |
| 193.103.160.0/23 | 512 | RIPE NCC | DE | 27th Sept 1994 |
| 193.103.4.0/22 | 1k | RIPE NCC | DE | 27th Sept 1994 |
| 193.103.8.0/21 | 2k | RIPE NCC | DE | 27th Sept 1994 |
| 193.104.100.0/24 | 256 | RIPE NCC | SE | 2nd Nov 2009 |
| 193.104.105.0/24 | 256 | RIPE NCC |  NO | 3rd Nov 2009 |
| 193.104.106.0/24 | 256 | RIPE NCC |  RO | 15th Aug 2011 |
| 193.104.122.0/24 | 256 | RIPE NCC | SE | 10th Nov 2009 |
| 193.104.126.0/24 | 256 | RIPE NCC | US | 17th Aug 2026 |