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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.54.225.0/24 | 256 | RIPE NCC |  SE | 15th Jun 1989 |
| 192.54.244.0/24 | 256 | RIPE NCC |  GB | 12th Nov 2019 |
| 192.54.245.0/24 | 256 | RIPE NCC | GB | 23rd Jun 1989 |
| 192.54.254.0/24 | 256 | RIPE NCC |  DE | 5th Jul 1989 |
| 192.54.31.0/24 | 256 | RIPE NCC | DE | 29th Aug 1989 |
| 192.54.32.0/24 | 256 | RIPE NCC | DE | 29th Aug 1989 |
| 192.54.33.0/24 | 256 | RIPE NCC | DE | 29th Aug 1989 |
| 192.54.37.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.38.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.40.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.46.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.47.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.50.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.51.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.52.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.54.0/23 | 512 | RIPE NCC |  RS | 4th Oct 2019 |
| 192.54.61.0/24 | 256 | RIPE NCC | DE | 1st Jan 1984 |
| 192.54.62.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.63.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.64.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.65.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.72.0/24 | 256 | RIPE NCC |  FR | 1st Jan 1984 |
| 192.54.74.0/24 | 256 | RIPE NCC | DE | 30th Mar 1994 |
| 192.54.75.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.78.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.54.80.0/24 | 256 | RIPE NCC | DE | 22nd May 1989 |
| 192.55.105.0/24 | 256 | RIPE NCC |  NL | 19th Jul 1989 |
| 192.55.115.0/24 | 256 | RIPE NCC | NL | 28th Jul 1989 |
| 192.55.129.0/24 | 256 | RIPE NCC | NL | 3rd Aug 1989 |
| 192.55.132.0/24 | 256 | RIPE NCC | GB | 4th Aug 1989 |
| 192.55.197.0/24 | 256 | RIPE NCC | DE | 16th Aug 1989 |
| 192.55.212.0/24 | 256 | RIPE NCC | GB | 24th Aug 1989 |
| 192.55.89.0/24 | 256 | RIPE NCC | DE | 10th Jul 1989 |
| 192.58.197.0/24 | 256 | RIPE NCC | SE | 11th Oct 1989 |
| 192.58.218.0/24 | 256 | RIPE NCC |  IT | 25th Oct 1989 |
| 192.58.228.0/23 | 512 | RIPE NCC | NL | 25th Oct 1989 |
| 192.58.28.0/24 | 256 | RIPE NCC |  LU | 5th Sept 1989 |
| 192.58.29.0/24 | 256 | RIPE NCC |  AE | 4th Jan 2012 |
| 192.64.100.0/24 | 256 | RIPE NCC |  BE | 14th Oct 1993 |
| 192.64.101.0/24 | 256 | RIPE NCC | BE | 14th Oct 1993 |
| 192.64.102.0/24 | 256 | RIPE NCC | BE | 14th Oct 1993 |
| 192.64.103.0/24 | 256 | RIPE NCC | BE | 14th Oct 1993 |
| 192.64.125.0/24 | 256 | RIPE NCC | GB | 12th Nov 2019 |
| 192.64.202.0/24 | 256 | RIPE NCC | DE | 1st Jan 1984 |
| 192.64.28.0/24 | 256 | RIPE NCC |  AT | 13th Jan 1994 |
| 192.65.132.0/24 | 256 | RIPE NCC | GB | 14th Nov 1989 |
| 192.65.139.0/24 | 256 | RIPE NCC | DE | 16th Nov 1989 |
| 192.65.144.0/24 | 256 | RIPE NCC | GB | 20th Nov 1989 |
| 192.65.145.0/24 | 256 | RIPE NCC | GB | 20th Nov 1989 |
| 192.65.146.0/24 | 256 | RIPE NCC | GB | 20th Nov 1989 |