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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
3,800 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 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 |
| 68.169.92.0/23 | 512 | ARIN | CA | 26th May 2026 |
| 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 |
| 69.58.26.0/24 | 256 | ARIN | CA | 16th Jul 2012 |
| 69.67.184.0/24 | 256 | ARIN | CA | 12th Aug 2003 |
| 69.80.232.0/21 | 2k | ARIN | CA | 1st Jun 2018 |
| 69.90.160.0/21 | 2k | ARIN | CA | 6th Nov 2003 |
| 69.90.224.0/22 | 1k | ARIN | CA | 6th Nov 2003 |
| 69.90.228.0/23 | 512 | ARIN | CA | 6th Nov 2003 |
| 69.90.231.0/24 | 256 | ARIN | CA | 6th Nov 2003 |
| 69.90.232.0/22 | 1k | ARIN | CA | 6th Nov 2003 |
| 69.90.44.0/22 | 1k | ARIN | CA | 6th Nov 2003 |
| 72.172.64.0/22 | 1k | ARIN | CA | 19th Dec 2022 |
| 72.19.12.0/22 | 1k | ARIN | CA | 30th Aug 2019 |
| 72.28.72.0/22 | 1k | ARIN | CA | 1st Sept 2006 |
| 72.28.78.0/23 | 512 | ARIN | CA | 1st Sept 2006 |
| 74.112.124.0/22 | 1k | ARIN | CA | 20th Apr 2009 |
| 74.112.144.0/21 | 2k | ARIN | CA | 21st Apr 2009 |
| 74.113.68.0/22 | 1k | ARIN | CA | 5th May 2009 |
| 74.117.52.0/22 | 1k | ARIN | CA | 27th Aug 2009 |
| 74.118.100.0/22 | 1k | ARIN | CA | 6th Oct 2009 |
| 74.118.134.0/24 | 256 | ARIN | CA | 26th Dec 2024 |
| 74.118.248.0/22 | 1k | ARIN | CA | 20th Oct 2009 |
| 74.119.120.0/22 | 1k | ARIN | CA | 31st Mar 2021 |
| 76.76.96.0/19 | 8.2k | ARIN | CA | 2nd May 2007 |
| 80.71.32.0/20 | 4.1k | ARIN | CA | 18th Sept 2018 |
| 85.8.224.0/24 | 256 | RIPE NCC | CA | 29th Jun 2026 |
| 91.209.179.0/24 | 256 | RIPE NCC | CA | 7th Nov 2019 |
| 91.230.28.0/22 | 1k | RIPE NCC | CA | 1st Jul 2011 |
| 91.242.227.0/24 | 256 | RIPE NCC | CA | 14th Oct 2021 |
| 96.45.48.0/22 | 1k | ARIN | CA | 3rd Oct 2025 |