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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,256 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 198.62.155.0/24 | 256 | ARIN |  US | 2nd Mar 1993 |
| 198.62.16.0/20 | 4.1k | ARIN |  CA | 22nd Feb 1993 |
| 198.62.162.0/24 | 256 | ARIN | US | 2nd Mar 1993 |
| 198.62.165.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.166.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.167.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.168.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.170.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.171.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.172.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.173.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.174.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.175.0/24 | 256 | ARIN | CA | 3rd Mar 1993 |
| 198.62.178.0/24 | 256 | ARIN | US | 3rd Mar 1993 |
| 198.62.182.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.183.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.184.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.185.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.186.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.187.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.188.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.189.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.190.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.191.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.192.0/23 | 512 | ARIN | US | 5th Mar 1993 |
| 198.62.194.0/24 | 256 | ARIN | US | 5th Mar 1993 |
| 198.62.195.0/24 | 256 | ARIN | US | 8th Mar 1993 |
| 198.62.199.0/24 | 256 | ARIN | US | 11th Mar 1993 |
| 198.62.200.0/24 | 256 | ARIN | US | 11th Mar 1993 |
| 198.62.201.0/24 | 256 | ARIN | US | 18th Oct 2013 |
| 198.62.204.0/24 | 256 | ARIN | US | 11th Mar 1993 |
| 198.62.205.0/24 | 256 | ARIN | US | 11th Mar 1993 |
| 198.62.206.0/24 | 256 | ARIN | US | 11th Mar 1993 |
| 198.62.207.0/24 | 256 | ARIN | US | 21st Oct 2013 |
| 198.62.208.0/24 | 256 | ARIN | US | 11th Mar 1993 |
| 198.62.211.0/24 | 256 | ARIN | US | 17th Mar 1993 |
| 198.62.212.0/24 | 256 | ARIN | US | 17th Mar 1993 |
| 198.62.213.0/24 | 256 | ARIN | US | 17th Mar 1993 |
| 198.62.214.0/24 | 256 | ARIN | US | 17th Mar 1993 |
| 198.62.216.0/24 | 256 | ARIN | US | 18th Mar 1993 |
| 198.62.220.0/24 | 256 | ARIN | US | 19th Mar 1993 |
| 198.62.221.0/24 | 256 | ARIN | US | 19th Mar 1993 |
| 198.62.222.0/24 | 256 | ARIN | US | 19th Mar 1993 |
| 198.62.223.0/24 | 256 | ARIN | US | 19th Mar 1993 |
| 198.62.224.0/24 | 256 | ARIN | US | 6th Aug 1993 |
| 198.62.225.0/24 | 256 | ARIN | US | 23rd Mar 1993 |
| 198.62.228.0/24 | 256 | ARIN | US | 23rd Mar 1993 |
| 198.62.230.0/24 | 256 | ARIN | US | 23rd Mar 1993 |
| 198.62.231.0/24 | 256 | ARIN | US | 23rd Mar 1993 |
| 198.62.232.0/24 | 256 | ARIN | US | 23rd Mar 1993 |