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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.76.125.0/24 | 256 | RIPE NCC |  DE | 2nd May 1994 |
| 192.76.126.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.127.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.128.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.130.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.131.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.132.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.136.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.139.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.140.0/24 | 256 | RIPE NCC | DE | 6th Jun 1996 |
| 192.76.141.0/24 | 256 | RIPE NCC | DE | 8th Jun 1992 |
| 192.76.142.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.143.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.149.0/24 | 256 | RIPE NCC |  GB | 12th Nov 2019 |
| 192.76.152.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.155.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.156.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.159.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.165.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.170.0/24 | 256 | RIPE NCC | DE | 17th Sept 1990 |
| 192.76.171.0/24 | 256 | RIPE NCC |  US | 12th Nov 2019 |
| 192.76.242.0/24 | 256 | RIPE NCC |  PT | 8th Oct 1990 |
| 192.76.244.0/24 | 256 | RIPE NCC |  AT | 8th Oct 1990 |
| 192.77.11.0/24 | 256 | RIPE NCC |  CH | 17th Oct 1990 |
| 192.77.132.0/22 | 1k | RIPE NCC | GB | 23rd Aug 1991 |
| 192.77.136.0/23 | 512 | RIPE NCC | GB | 23rd Aug 1991 |
| 192.77.138.0/24 | 256 | RIPE NCC | GB | 23rd Aug 1991 |
| 192.77.140.0/24 | 256 | RIPE NCC |  ES | 26th Aug 1991 |
| 192.77.141.0/24 | 256 | RIPE NCC | ES | 26th Aug 1991 |
| 192.78.160.0/20 | 4.1k | RIPE NCC | DE | 3rd Oct 1989 |
| 192.78.192.0/20 | 4.1k | RIPE NCC | DE | 1st Jun 1990 |
| 192.80.21.0/24 | 256 | RIPE NCC | PT | 30th Mar 1990 |
| 192.80.31.0/24 | 256 | RIPE NCC | CH | 3rd May 1990 |
| 192.80.32.0/21 | 2k | RIPE NCC | CH | 3rd May 1990 |
| 192.80.40.0/23 | 512 | RIPE NCC | CH | 3rd May 1990 |
| 192.80.42.0/24 | 256 | RIPE NCC | CH | 3rd May 1990 |
| 192.80.46.0/24 | 256 | RIPE NCC | GB | 7th May 1990 |
| 192.80.51.0/24 | 256 | RIPE NCC | DE | 8th May 1990 |
| 192.81.109.0/24 | 256 | RIPE NCC |  NO | 13th Jan 1993 |
| 192.81.160.0/24 | 256 | RIPE NCC |  FI | 1st Sept 1993 |
| 192.81.182.0/23 | 512 | RIPE NCC | FI | 1st Sept 1993 |
| 192.81.193.0/24 | 256 | RIPE NCC |  IT | 10th Mar 2017 |
| 192.81.194.0/24 | 256 | RIPE NCC |  SE | 29th Oct 1992 |
| 192.81.230.0/24 | 256 | RIPE NCC | DE | 1st Jan 1984 |
| 192.81.234.0/24 | 256 | RIPE NCC | GB | 1st Jan 1984 |
| 192.81.59.0/24 | 256 | RIPE NCC |  BE | 18th May 1994 |
| 192.81.61.0/24 | 256 | RIPE NCC | GB | 31st Aug 1995 |
| 192.81.62.0/24 | 256 | RIPE NCC | GB | 31st Aug 1995 |
| 192.82.121.0/24 | 256 | RIPE NCC | GB | 16th Jul 1990 |
| 192.82.124.0/24 | 256 | RIPE NCC | GB | 30th Jul 1990 |