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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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Countries with unannounced space registered through ARIN, largest first.
Unannounced blocks registered through ARIN
30,463 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 198.168.6.0/24 | 256 | ARIN |  CA | 11th Aug 1993 |
| 198.168.7.0/24 | 256 | ARIN | CA | 12th Aug 1993 |
| 198.168.80.0/21 | 2k | ARIN | CA | 7th Dec 1993 |
| 198.168.88.0/22 | 1k | ARIN | CA | 7th Dec 1993 |
| 198.168.92.0/23 | 512 | ARIN | CA | 7th Dec 1993 |
| 198.168.94.0/23 | 512 | ARIN | CA | 3rd Apr 2025 |
| 198.169.100.0/22 | 1k | ARIN | CA | 22nd Nov 1993 |
| 198.169.120.0/22 | 1k | ARIN | CA | 14th Dec 1993 |
| 198.169.124.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.130.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.131.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.150.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.151.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.154.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.156.0/22 | 1k | ARIN | CA | 14th Dec 1993 |
| 198.169.160.0/21 | 2k | ARIN | CA | 14th Dec 1993 |
| 198.169.170.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.171.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.175.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.176.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.178.0/24 | 256 | ARIN | CA | 14th Dec 1994 |
| 198.169.179.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.181.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.182.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.184.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.185.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.186.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.190.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.192.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.194.0/23 | 512 | ARIN |  US | 21st Nov 2013 |
| 198.169.196.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.199.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.200.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.201.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.202.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.210.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.212.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.213.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.214.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.216.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.218.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.219.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.220.0/22 | 1k | ARIN | CA | 14th Dec 1993 |
| 198.169.224.0/22 | 1k | ARIN | CA | 14th Dec 1993 |
| 198.169.228.0/23 | 512 | ARIN | CA | 14th Dec 1993 |
| 198.169.232.0/22 | 1k | ARIN | US | 5th Nov 2012 |
| 198.169.240.0/24 | 256 | ARIN | CA | 14th Dec 1993 |
| 198.169.252.0/24 | 256 | ARIN | CA | 21st Apr 1994 |
| 198.169.253.0/24 | 256 | ARIN | CA | 16th Dec 1993 |
| 198.169.26.0/24 | 256 | ARIN | CA | 11th May 1994 |