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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Canada
3,819 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 198.168.244.0/22 | 1k | ARIN |  CA | 15th Feb 1994 |
| 198.168.248.0/23 | 512 | ARIN | CA | 15th Feb 1994 |
| 198.168.25.0/24 | 256 | ARIN | CA | 20th Sept 1993 |
| 198.168.250.0/23 | 512 | ARIN | CA | 31st Mar 1994 |
| 198.168.26.0/24 | 256 | ARIN | CA | 20th Sept 1993 |
| 198.168.29.0/24 | 256 | ARIN | CA | 18th Jan 1994 |
| 198.168.3.0/24 | 256 | ARIN | CA | 12th Jul 1993 |
| 198.168.4.0/24 | 256 | ARIN | CA | 9th Jul 1993 |
| 198.168.42.0/24 | 256 | ARIN | CA | 14th Feb 1994 |
| 198.168.56.0/21 | 2k | ARIN | CA | 7th Dec 1993 |
| 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 |
| 198.169.196.0/23 | 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 |