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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 192.147.36.0/24 | 256 | RIPE NCC |  GB | 12th Feb 1992 |
| 192.147.42.0/24 | 256 | RIPE NCC |  PL | 12th Feb 1992 |
| 192.147.76.0/24 | 256 | RIPE NCC |  PT | 14th Feb 1992 |
| 192.147.77.0/24 | 256 | RIPE NCC | PT | 14th Feb 1992 |
| 192.147.78.0/24 | 256 | RIPE NCC | PT | 14th Feb 1992 |
| 192.147.79.0/24 | 256 | RIPE NCC |  FR | 14th Feb 1992 |
| 192.148.103.0/24 | 256 | RIPE NCC | PT | 5th Mar 1992 |
| 192.148.166.0/24 | 256 | RIPE NCC |  RU | 27th Feb 1992 |
| 192.148.177.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.178.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.179.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.180.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.181.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.182.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.183.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.184.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.185.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.186.0/24 | 256 | RIPE NCC | GB | 28th Feb 1992 |
| 192.148.192.0/24 | 256 | RIPE NCC |  NL | 2nd Mar 1992 |
| 192.148.194.0/24 | 256 | RIPE NCC | GB | 2nd Mar 1992 |
| 192.148.198.0/24 | 256 | RIPE NCC | GB | 3rd Mar 1992 |
| 192.148.199.0/24 | 256 | RIPE NCC | GB | 3rd Mar 1992 |
| 192.148.200.0/24 | 256 | RIPE NCC | NL | 3rd Mar 1992 |
| 192.148.216.0/24 | 256 | RIPE NCC | GB | 3rd Mar 1992 |
| 192.148.220.0/24 | 256 | RIPE NCC |  IT | 4th Mar 1992 |
| 192.148.33.0/24 | 256 | RIPE NCC |  SE | 19th Feb 1992 |
| 192.148.34.0/23 | 512 | RIPE NCC | SE | 19th Feb 1992 |
| 192.148.36.0/22 | 1k | RIPE NCC | SE | 19th Feb 1992 |
| 192.148.40.0/21 | 2k | RIPE NCC | SE | 19th Feb 1992 |
| 192.148.48.0/20 | 4.1k | RIPE NCC | SE | 19th Feb 1992 |
| 192.148.80.0/21 | 2k | RIPE NCC | SE | 19th Feb 1992 |
| 192.148.88.0/22 | 1k | RIPE NCC | SE | 19th Feb 1992 |
| 192.148.92.0/24 | 256 | RIPE NCC | SE | 19th Feb 1992 |
| 192.149.100.0/24 | 256 | RIPE NCC |  NO | 6th Mar 1992 |
| 192.149.102.0/24 | 256 | RIPE NCC | NO | 6th Mar 1992 |
| 192.149.110.0/24 | 256 | RIPE NCC | IT | 6th Mar 1992 |
| 192.149.118.0/24 | 256 | RIPE NCC | NL | 10th Mar 1992 |
| 192.149.121.0/24 | 256 | RIPE NCC | GB | 10th Mar 1992 |
| 192.149.126.0/24 | 256 | RIPE NCC |  DE | 10th Mar 1992 |
| 192.149.19.0/24 | 256 | RIPE NCC |  ES | 24th Feb 1992 |
| 192.149.227.0/24 | 256 | RIPE NCC | NL | 23rd Mar 1992 |
| 192.149.238.0/24 | 256 | RIPE NCC | GB | 24th Mar 1992 |
| 192.149.27.0/24 | 256 | RIPE NCC |  AT | 25th Feb 1992 |
| 192.149.29.0/24 | 256 | RIPE NCC | SE | 26th Feb 1992 |
| 192.149.3.0/24 | 256 | RIPE NCC | PL | 21st Feb 1992 |
| 192.149.30.0/23 | 512 | RIPE NCC | SE | 26th Feb 1992 |
| 192.149.32.0/23 | 512 | RIPE NCC | SE | 26th Feb 1992 |
| 192.149.35.0/24 | 256 | RIPE NCC | SE | 26th Feb 1992 |
| 192.149.41.0/24 | 256 | RIPE NCC | FR | 26th Feb 1992 |
| 192.149.5.0/24 | 256 | RIPE NCC |  FI | 21st Feb 1992 |