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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,783 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 89.47.35.0/24 | 256 | RIPE NCC |  TR | 29th Nov 2005 |
| 89.47.37.0/24 | 256 | RIPE NCC |  LT | 29th Nov 2005 |
| 89.47.60.0/23 | 512 | RIPE NCC |  RO | 29th Nov 2005 |
| 89.47.91.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.48.0.0/13 | 524k | ARIN |  US | 4th Dec 2024 |
| 9.0.0.0/13 | 524k | ARIN | US | 16th Dec 1988 |
| 9.10.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.12.0.0/14 | 262k | ARIN | US | 16th Dec 1988 |
| 9.137.0.0/16 | 65.5k | RIPE NCC |  AE | 16th Dec 1988 |
| 9.147.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.148.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.150.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.152.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.153.0.0/16 | 65.5k | RIPE NCC | AE | 16th Dec 1988 |
| 9.155.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.156.0.0/16 | 65.5k | APNIC |  TH | 16th Dec 1988 |
| 9.16.0.0/12 | 1M | ARIN | US | 16th Dec 1988 |
| 9.162.0.0/16 | 65.5k | RIPE NCC |  SA | 16th Dec 1988 |
| 9.171.0.0/16 | 65.5k | RIPE NCC | AE | 16th Dec 1988 |
| 9.172.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.174.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.178.0.0/16 | 65.5k | RIPE NCC | AE | 16th Dec 1988 |
| 9.180.0.0/14 | 262k | ARIN | US | 16th Dec 1988 |
| 9.184.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.186.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.188.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.194.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.197.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.199.0.0/16 | 65.5k | RIPE NCC | AE | 16th Dec 1988 |
| 9.200.0.0/14 | 262k | ARIN | US | 16th Dec 1988 |
| 9.207.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.208.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.210.0.0/15 | 131k | RIPE NCC |  DE | 16th Dec 1988 |
| 9.212.0.0/16 | 65.5k | RIPE NCC | SA | 16th Dec 1988 |
| 9.213.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.214.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.216.0.0/14 | 262k | ARIN | US | 16th Dec 1988 |
| 9.221.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.222.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.224.0.0/14 | 262k | ARIN | US | 16th Dec 1988 |
| 9.230.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.236.0.0/16 | 65.5k | RIPE NCC | US | 16th Dec 1988 |
| 9.238.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.240.0.0/15 | 131k | RIPE NCC | US | 16th Dec 1988 |
| 9.242.0.0/15 | 131k | ARIN | US | 16th Dec 1988 |
| 9.247.0.0/16 | 65.5k | ARIN | US | 16th Dec 1988 |
| 9.250.0.0/15 | 131k | RIPE NCC | SA | 16th Dec 1988 |
| 9.252.0.0/14 | 262k | ARIN | US | 16th Dec 1988 |
| 9.32.0.0/11 | 2.1M | ARIN | US | 16th Dec 1988 |
| 9.64.0.0/10 | 4.2M | ARIN | US | 16th Dec 1988 |