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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,650 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 89.41.152.0/21 | 2k | RIPE NCC |  ES | 29th Nov 2005 |
| 89.41.224.0/20 | 4.1k | ARIN |  US | 21st Jun 2021 |
| 89.41.25.0/24 | 256 | RIPE NCC |  RO | 29th Nov 2005 |
| 89.41.27.0/24 | 256 | RIPE NCC |  GB | 29th Nov 2005 |
| 89.41.58.0/23 | 512 | RIPE NCC |  IR | 29th Nov 2005 |
| 89.42.104.0/22 | 1k | RIPE NCC |  MD | 29th Nov 2005 |
| 89.42.128.0/22 | 1k | RIPE NCC | MD | 29th Nov 2005 |
| 89.42.154.0/24 | 256 | RIPE NCC | GB | 29th Nov 2005 |
| 89.42.155.0/24 | 256 | RIPE NCC | GB | 29th Nov 2005 |
| 89.42.156.0/23 | 512 | RIPE NCC | RO | 29th Nov 2005 |
| 89.42.158.0/23 | 512 | RIPE NCC |  AT | 29th Nov 2005 |
| 89.42.162.0/24 | 256 | RIPE NCC |  PL | 29th Nov 2005 |
| 89.42.180.0/22 | 1k | RIPE NCC | MD | 29th Nov 2005 |
| 89.42.224.0/22 | 1k | RIPE NCC | MD | 29th Nov 2005 |
| 89.42.240.0/21 | 2k | RIPE NCC | RO | 29th Nov 2005 |
| 89.42.25.0/24 | 256 | RIPE NCC |  IT | 29th Nov 2005 |
| 89.42.26.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.42.56.0/23 | 512 | RIPE NCC | IR | 29th Nov 2005 |
| 89.42.64.0/22 | 1k | RIPE NCC | MD | 29th Nov 2005 |
| 89.43.128.0/22 | 1k | RIPE NCC | MD | 29th Nov 2005 |
| 89.43.160.0/22 | 1k | RIPE NCC | RO | 29th Nov 2005 |
| 89.43.168.0/22 | 1k | RIPE NCC | MD | 29th Nov 2005 |
| 89.43.176.0/22 | 1k | RIPE NCC | ES | 29th Nov 2005 |
| 89.43.180.0/23 | 512 | RIPE NCC | RO | 29th Nov 2005 |
| 89.43.248.0/21 | 2k | RIPE NCC | RO | 29th Nov 2005 |
| 89.43.54.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.43.62.0/24 | 256 | RIPE NCC |  AE | 29th Nov 2005 |
| 89.43.80.0/22 | 1k | RIPE NCC | RO | 29th Nov 2005 |
| 89.44.125.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.44.136.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.44.145.0/24 | 256 | RIPE NCC | ES | 29th Nov 2005 |
| 89.44.152.0/22 | 1k | RIPE NCC | MD | 29th Nov 2005 |
| 89.44.188.0/24 | 256 | RIPE NCC | PL | 29th Nov 2005 |
| 89.44.189.0/24 | 256 | RIPE NCC | IT | 29th Nov 2005 |
| 89.44.208.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.44.212.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.44.36.0/22 | 1k | RIPE NCC | ES | 29th Nov 2005 |
| 89.44.44.0/23 | 512 | RIPE NCC | RO | 29th Nov 2005 |
| 89.44.46.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.44.88.0/22 | 1k | RIPE NCC | RO | 29th Nov 2005 |
| 89.45.11.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.45.126.0/23 | 512 | RIPE NCC | IR | 29th Nov 2005 |
| 89.45.128.0/20 | 4.1k | RIPE NCC |  SY | 29th Nov 2005 |
| 89.45.144.0/21 | 2k | RIPE NCC | RO | 29th Nov 2005 |
| 89.45.162.0/24 | 256 | RIPE NCC | AE | 29th Nov 2005 |
| 89.45.210.0/23 | 512 | RIPE NCC | RO | 29th Nov 2005 |
| 89.45.225.0/24 | 256 | RIPE NCC | RO | 29th Nov 2005 |
| 89.45.229.0/24 | 256 | RIPE NCC | IT | 29th Nov 2005 |
| 89.45.248.0/21 | 2k | RIPE NCC | RO | 29th Nov 2005 |
| 89.45.32.0/23 | 512 | RIPE NCC | RO | 29th Nov 2005 |