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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
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Countries with the most unannounced blocks, largest first.
Unannounced blocks in Canada
3,819 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2605:7400::/32 | 4.3B × /64 | ARIN |  CA | 10th Aug 2010 |
| 2605:7480::/32 | 4.3B × /64 | ARIN | CA | 23rd May 2014 |
| 2605:74c0::/32 | 4.3B × /64 | ARIN | CA | 23rd Oct 2019 |
| 2605:7e40::/32 | 4.3B × /64 | ARIN | CA | 22nd Nov 2019 |
| 2605:8040::/32 | 4.3B × /64 | ARIN | CA | 26th Nov 2019 |
| 2605:8640::/32 | 4.3B × /64 | ARIN | CA | 17th Dec 2019 |
| 2605:8f40::/32 | 4.3B × /64 | ARIN | CA | 8th Jan 2020 |
| 2605:9340::/32 | 4.3B × /64 | ARIN | CA | 13th Jan 2020 |
| 2605:9680::/32 | 4.3B × /64 | ARIN | CA | 22nd Jul 2014 |
| 2605:98c0::/32 | 4.3B × /64 | ARIN | CA | 23rd Jan 2020 |
| 2605:a4c0::/32 | 4.3B × /64 | ARIN | CA | 14th Feb 2020 |
| 2605:b480::/32 | 4.3B × /64 | ARIN | CA | 13th Oct 2014 |
| 2605:b880::/32 | 4.3B × /64 | ARIN | CA | 21st Oct 2014 |
| 2605:b900::/32 | 4.3B × /64 | ARIN | CA | 16th Aug 2011 |
| 2605:ba80::/32 | 4.3B × /64 | ARIN | CA | 21st Oct 2014 |
| 2605:bac0::/32 | 4.3B × /64 | ARIN | CA | 15th Apr 2020 |
| 2605:c980::/32 | 4.3B × /64 | ARIN | CA | 8th Apr 2026 |
| 2605:d240::/32 | 4.3B × /64 | ARIN | CA | 15th Jun 2020 |
| 2605:d6c0::/32 | 4.3B × /64 | ARIN | CA | 1st Jul 2020 |
| 2605:d8c0::/32 | 4.3B × /64 | ARIN | CA | 10th Jul 2020 |
| 2605:e2c0::/32 | 4.3B × /64 | ARIN | CA | 6th Aug 2020 |
| 2605:e840::/32 | 4.3B × /64 | ARIN | CA | 21st Aug 2020 |
| 2605:f6c0::/32 | 4.3B × /64 | ARIN | CA | 4th Oct 2020 |
| 2605:fa00::/32 | 4.3B × /64 | ARIN | CA | 2nd Feb 2011 |
| 2605:ffc0::/32 | 4.3B × /64 | ARIN | CA | 21st Oct 2020 |
| 2606:16c0::/32 | 4.3B × /64 | ARIN | CA | 30th Dec 2020 |
| 2606:21c0::/32 | 4.3B × /64 | ARIN | CA | 21st Jan 2021 |
| 2606:2340::/32 | 4.3B × /64 | ARIN | CA | 1st Feb 2021 |
| 2606:2bc0::/32 | 4.3B × /64 | ARIN | CA | 4th Mar 2021 |
| 2606:3100::/32 | 4.3B × /64 | ARIN | CA | 13th Oct 2011 |
| 2606:3140::/32 | 4.3B × /64 | ARIN | CA | 16th Mar 2021 |
| 2606:4380::/32 | 4.3B × /64 | ARIN | CA | 8th Jul 2015 |
| 2606:49c0::/32 | 4.3B × /64 | ARIN | CA | 7th May 2026 |
| 2606:4ac0::/32 | 4.3B × /64 | ARIN | CA | 29th Apr 2021 |
| 2606:5fc0::/32 | 4.3B × /64 | ARIN | CA | 8th Jul 2021 |
| 2606:60c0::/32 | 4.3B × /64 | ARIN | CA | 9th Jul 2021 |
| 2606:6180::/32 | 4.3B × /64 | ARIN | CA | 11th May 2026 |
| 2606:64c0::/32 | 4.3B × /64 | ARIN | CA | 21st Jul 2021 |
| 2606:6780::/32 | 4.3B × /64 | ARIN | CA | 18th Aug 2015 |
| 2606:7680::/32 | 4.3B × /64 | ARIN | CA | 2nd Sept 2015 |
| 2606:7880::/32 | 4.3B × /64 | ARIN | CA | 3rd Sept 2015 |
| 2606:7cc0::/32 | 4.3B × /64 | ARIN | CA | 17th Sept 2021 |
| 2606:b0c0::/32 | 4.3B × /64 | ARIN | CA | 9th Feb 2022 |
| 2606:b240::/32 | 4.3B × /64 | ARIN | CA | 11th Feb 2022 |
| 2606:b6c0::/32 | 4.3B × /64 | ARIN | CA | 22nd Feb 2022 |
| 2606:b800::/32 | 4.3B × /64 | ARIN | CA | 26th May 2010 |
| 2606:c340::/32 | 4.3B × /64 | ARIN | CA | 28th Mar 2022 |
| 2606:c880::/32 | 4.3B × /64 | ARIN | CA | 8th Dec 2015 |
| 2606:d180::/32 | 4.3B × /64 | ARIN | CA | 17th Dec 2015 |
| 2606:d4c0::/32 | 4.3B × /64 | ARIN | CA | 24th May 2022 |