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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.203.108.0/23 | 512 | RIPE NCC |  FI | 21st Aug 1992 |
| 192.203.227.0/24 | 256 | RIPE NCC |  SA | 30th Oct 1992 |
| 192.206.222.0/24 | 256 | RIPE NCC |  IL | 29th Oct 1993 |
| 192.206.223.0/24 | 256 | RIPE NCC | IL | 18th Sept 1992 |
| 192.206.224.0/24 | 256 | RIPE NCC | IL | 18th Sept 1992 |
| 192.206.225.0/24 | 256 | RIPE NCC | IL | 18th Sept 1992 |
| 192.206.226.0/24 | 256 | RIPE NCC | IL | 18th Sept 1992 |
| 192.206.77.0/24 | 256 | RIPE NCC |  GB | 24th Aug 1992 |
| 192.206.78.0/24 | 256 | RIPE NCC | GB | 24th Aug 1992 |
| 192.206.79.0/24 | 256 | RIPE NCC | GB | 24th Aug 1992 |
| 192.206.80.0/24 | 256 | RIPE NCC | GB | 24th Aug 1992 |
| 192.206.81.0/24 | 256 | RIPE NCC | GB | 24th Aug 1992 |
| 192.206.86.0/24 | 256 | RIPE NCC | IL | 24th Aug 1992 |
| 192.207.141.0/24 | 256 | RIPE NCC | GB | 29th Aug 1992 |
| 192.207.142.0/24 | 256 | RIPE NCC |  LU | 29th Aug 1992 |
| 192.207.31.0/24 | 256 | RIPE NCC |  NL | 18th Aug 1992 |
| 192.207.47.0/24 | 256 | RIPE NCC | IL | 18th Aug 1992 |
| 192.21.0.0/16 | 65.5k | RIPE NCC |  SE | 22nd Jan 1986 |
| 192.231.18.0/24 | 256 | RIPE NCC |  TR | 22nd Sept 1992 |
| 192.231.19.0/24 | 256 | RIPE NCC | TR | 22nd Sept 1992 |
| 192.231.22.0/24 | 256 | RIPE NCC | TR | 22nd Sept 1992 |
| 192.231.25.0/24 | 256 | RIPE NCC | TR | 22nd Sept 1992 |
| 192.231.67.0/24 | 256 | RIPE NCC |  AT | 30th Sept 1992 |
| 192.231.82.0/24 | 256 | RIPE NCC |  DE | 1st Oct 1992 |
| 192.238.1.0/24 | 256 | RIPE NCC |  CH | 1st Sept 1993 |
| 192.238.10.0/24 | 256 | RIPE NCC | CH | 1st Sept 1993 |
| 192.238.2.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 192.238.4.0/22 | 1k | RIPE NCC | CH | 1st Sept 1993 |
| 192.238.8.0/23 | 512 | RIPE NCC | CH | 1st Sept 1993 |
| 192.245.152.0/24 | 256 | RIPE NCC |  UA | 9th Nov 1992 |
| 192.245.225.0/24 | 256 | RIPE NCC | GB | 25th Nov 1992 |
| 192.245.97.0/24 | 256 | RIPE NCC | SE | 2nd Nov 1992 |
| 192.247.1.0/24 | 256 | RIPE NCC | GB | 26th Oct 1992 |
| 192.247.10.0/24 | 256 | RIPE NCC | GB | 26th Oct 1992 |
| 192.247.2.0/23 | 512 | RIPE NCC | GB | 26th Oct 1992 |
| 192.247.4.0/22 | 1k | RIPE NCC | GB | 26th Oct 1992 |
| 192.247.8.0/23 | 512 | RIPE NCC | GB | 26th Oct 1992 |
| 192.26.105.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.106.0/24 | 256 | RIPE NCC | FI | 12th Jan 1993 |
| 192.26.107.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.108.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.109.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.112.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.113.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.114.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.115.0/24 | 256 | RIPE NCC | FI | 13th Apr 1994 |
| 192.26.116.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.117.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.118.0/24 | 256 | RIPE NCC | FI | 16th Jan 1987 |
| 192.26.120.0/24 | 256 | RIPE NCC | FI | 2nd Jun 1993 |