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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
3,830 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 64.65.32.0/24 | 256 | ARIN |  CA | 23rd Mar 2000 |
| 64.65.42.0/24 | 256 | ARIN | CA | 23rd Mar 2000 |
| 64.65.46.0/24 | 256 | ARIN | CA | 23rd Mar 2000 |
| 64.65.60.0/24 | 256 | ARIN | CA | 23rd Mar 2000 |
| 64.66.32.0/22 | 1k | ARIN | CA | 12th Jul 2019 |
| 64.74.58.0/24 | 256 | ARIN | CA | 5th Nov 2026 |
| 64.87.128.0/17 | 32.8k | ARIN | CA | 4th May 2001 |
| 64.94.86.0/24 | 256 | ARIN | CA | 14th Sept 2023 |
| 65.181.110.0/24 | 256 | ARIN | CA | 22nd Apr 2025 |
| 65.255.224.0/20 | 4.1k | ARIN | CA | 14th Jan 2004 |
| 65.39.204.0/24 | 256 | ARIN | CA | 21st Jun 2002 |
| 65.39.206.0/23 | 512 | ARIN | CA | 21st Jun 2002 |
| 65.61.58.0/24 | 256 | ARIN | CA | 30th Aug 2018 |
| 66.111.32.0/20 | 4.1k | ARIN | CA | 26th Sept 2018 |
| 66.118.32.0/22 | 1k | ARIN | CA | 4th Oct 2021 |
| 66.132.135.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.142.0/23 | 512 | ARIN | CA | 1st Aug 2025 |
| 66.132.149.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.150.0/23 | 512 | ARIN | CA | 8th Aug 2003 |
| 66.132.173.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.174.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.132.236.0/24 | 256 | ARIN | CA | 8th Aug 2003 |
| 66.133.72.0/21 | 2k | ARIN | CA | 29th Sept 2026 |
| 66.180.68.0/22 | 1k | ARIN | CA | 19th Dec 2016 |
| 66.187.14.0/24 | 256 | ARIN | CA | 26th Dec 2024 |
| 66.223.48.0/24 | 256 | ARIN | CA | 25th Jan 2002 |
| 66.33.7.0/24 | 256 | ARIN | CA | 13th Oct 2000 |
| 66.36.128.0/19 | 8.2k | ARIN | CA | 22nd Aug 2002 |
| 66.40.192.0/18 | 16.4k | ARIN | CA | 31st Oct 2000 |
| 66.40.64.0/19 | 8.2k | ARIN | CA | 31st Oct 2000 |
| 66.40.96.0/21 | 2k | ARIN | CA | 31st Oct 2000 |
| 66.59.128.0/18 | 16.4k | ARIN | CA | 5th Jan 2001 |
| 66.6.60.0/22 | 1k | ARIN | CA | 21st Dec 2023 |
| 66.85.35.0/24 | 256 | ARIN | CA | 28th Aug 2026 |
| 67.21.193.0/24 | 256 | ARIN | CA | 6th Feb 2009 |
| 67.221.251.0/24 | 256 | ARIN | CA | 26th Feb 2025 |
| 67.226.188.0/23 | 512 | ARIN | CA | 19th Dec 2007 |
| 67.226.224.0/19 | 8.2k | ARIN | CA | 4th Jun 2009 |
| 68.170.12.0/22 | 1k | ARIN | CA | 10th Jul 2023 |
| 69.0.160.0/23 | 512 | ARIN | CA | 23rd Sept 2002 |
| 69.0.162.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.197.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.203.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.209.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.210.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.0.215.0/24 | 256 | ARIN | CA | 23rd Sept 2002 |
| 69.12.106.0/23 | 512 | ARIN | CA | 22nd Feb 2019 |
| 69.160.161.0/24 | 256 | ARIN | CA | 3rd Aug 2020 |
| 69.28.216.0/23 | 512 | ARIN | CA | 10th Mar 2003 |
| 69.28.220.0/22 | 1k | ARIN | CA | 10th Mar 2003 |