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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
85,195 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 192.65.52.0/24 | 256 | RIPE NCC |  NL | 3rd Nov 1989 |
| 192.65.53.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.54.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.55.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.56.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.57.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.58.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.59.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.60.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.61.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.62.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.63.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.64.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.65.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.66.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.67.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.68.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.69.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.70.0/24 | 256 | RIPE NCC | NL | 3rd Nov 1989 |
| 192.65.71.0/24 | 256 | ARIN |  US | 3rd Nov 1989 |
| 192.65.72.0/24 | 256 | ARIN | US | 6th Nov 1989 |
| 192.65.73.0/24 | 256 | ARIN | US | 6th Nov 1989 |
| 192.65.74.0/24 | 256 | ARIN | US | 6th Nov 1989 |
| 192.65.75.0/24 | 256 | ARIN | US | 6th Nov 1989 |
| 192.65.76.0/24 | 256 | ARIN | US | 6th Nov 1989 |
| 192.65.80.0/24 | 256 | ARIN | US | 29th Jul 1994 |
| 192.65.9.0/24 | 256 | ARIN | US | 1st Nov 1989 |
| 192.65.94.0/24 | 256 | RIPE NCC |  CH | 8th Nov 1989 |
| 192.65.96.0/24 | 256 | RIPE NCC | NL | 1st Sept 1993 |
| 192.65.98.0/24 | 256 | ARIN | US | 10th Nov 1989 |
| 192.65.99.0/24 | 256 | ARIN | US | 13th Nov 1989 |
| 192.66.0.0/24 | 256 | RIPE NCC |  DK | 7th Nov 1989 |
| 192.66.1.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.116.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.117.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.118.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.119.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.120.0/21 | 2k | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.128.0/22 | 1k | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.13.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.132.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.133.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.134.0/23 | 512 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.136.0/21 | 2k | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.14.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.144.0/22 | 1k | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.148.0/23 | 512 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.15.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.150.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |
| 192.66.151.0/24 | 256 | RIPE NCC | DK | 7th Nov 1989 |