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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,459 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2607:7800::/32 | 4.3B × /64 | ARIN |  US | 7th Jun 2010 |
| 2607:78c0::/32 | 4.3B × /64 | ARIN | US | 2nd Nov 2023 |
| 2607:7900::/32 | 4.3B × /64 | ARIN | US | 17th May 2012 |
| 2607:7940::/32 | 4.3B × /64 | ARIN | US | 6th Nov 2023 |
| 2607:7980::/32 | 4.3B × /64 | ARIN | US | 28th Jul 2016 |
| 2607:79c0::/32 | 4.3B × /64 | ARIN | US | 6th Nov 2023 |
| 2607:7a00::/32 | 4.3B × /64 | ARIN | US | 4th Mar 2011 |
| 2607:7a80::/32 | 4.3B × /64 | ARIN | US | 28th Jul 2016 |
| 2607:7b40::/32 | 4.3B × /64 | ARIN | US | 13th Nov 2023 |
| 2607:7bc0::/32 | 4.3B × /64 | ARIN | US | 13th Nov 2023 |
| 2607:7c0::/32 | 4.3B × /64 | ARIN |  CA | 15th Nov 2022 |
| 2607:7c40::/32 | 4.3B × /64 | ARIN | US | 14th Nov 2023 |
| 2607:7d80::/32 | 4.3B × /64 | ARIN | US | 1st Aug 2016 |
| 2607:7dc0::/32 | 4.3B × /64 | ARIN | US | 16th Nov 2023 |
| 2607:7e00::/32 | 4.3B × /64 | ARIN | CA | 4th Mar 2011 |
| 2607:7e40::/32 | 4.3B × /64 | ARIN | US | 20th Nov 2023 |
| 2607:7ec0::/32 | 4.3B × /64 | ARIN | US | 12th Jun 2026 |
| 2607:7f00::/32 | 4.3B × /64 | ARIN | US | 8th Oct 2012 |
| 2607:7f80::/32 | 4.3B × /64 | ARIN | US | 4th Aug 2016 |
| 2607:8000::/32 | 4.3B × /64 | ARIN | US | 18th Feb 2010 |
| 2607:8080::/32 | 4.3B × /64 | ARIN | US | 5th Aug 2016 |
| 2607:80::/32 | 4.3B × /64 | ARIN | US | 17th Feb 2016 |
| 2607:8340::/32 | 4.3B × /64 | ARIN | US | 5th Dec 2023 |
| 2607:83c0::/32 | 4.3B × /64 | ARIN | CA | 8th Dec 2023 |
| 2607:840::/32 | 4.3B × /64 | ARIN | US | 15th Nov 2022 |
| 2607:8580::/32 | 4.3B × /64 | ARIN |  VI | 11th Aug 2016 |
| 2607:85c0::/32 | 4.3B × /64 | ARIN | CA | 19th Dec 2023 |
| 2607:8680::/32 | 4.3B × /64 | ARIN | US | 12th Aug 2016 |
| 2607:8780::/32 | 4.3B × /64 | ARIN | US | 12th Aug 2016 |
| 2607:87c0::/32 | 4.3B × /64 | ARIN | US | 4th Jan 2024 |
| 2607:8800::/32 | 4.3B × /64 | ARIN | US | 8th Jun 2010 |
| 2607:880::/32 | 4.3B × /64 | ARIN | US | 29th Feb 2016 |
| 2607:8880::/32 | 4.3B × /64 | ARIN | CA | 17th Aug 2016 |
| 2607:8980::/36 | 268M × /64 | ARIN | US | 17th Aug 2016 |
| 2607:89c0::/32 | 4.3B × /64 | ARIN | US | 8th Jan 2024 |
| 2607:8a80::/32 | 4.3B × /64 | ARIN |  PR | 18th Aug 2016 |
| 2607:8b40::/32 | 4.3B × /64 | ARIN | CA | 16th Jan 2024 |
| 2607:8c00::/32 | 4.3B × /64 | ARIN | US | 11th Oct 2010 |
| 2607:8c0::/28 | 68.7B × /64 | ARIN | US | 16th Nov 2022 |
| 2607:8d00::/32 | 4.3B × /64 | ARIN | US | 31st May 2012 |
| 2607:8d80::/32 | 4.3B × /64 | ARIN | US | 24th Aug 2016 |
| 2607:8e80::/32 | 4.3B × /64 | ARIN | CA | 24th Aug 2016 |
| 2607:8f00::/32 | 4.3B × /64 | ARIN | US | 4th Jun 2012 |
| 2607:8f40::/32 | 4.3B × /64 | ARIN | US | 26th Jan 2024 |
| 2607:8fc0::/32 | 4.3B × /64 | ARIN | US | 26th Jan 2024 |
| 2607:900::/32 | 4.3B × /64 | ARIN | US | 27th Feb 2012 |
| 2607:9040::/32 | 4.3B × /64 | ARIN | US | 30th Jan 2024 |
| 2607:9300::/32 | 4.3B × /64 | ARIN | US | 15th Jun 2026 |
| 2607:9340::/32 | 4.3B × /64 | ARIN | US | 5th Feb 2024 |
| 2607:9380::/32 | 4.3B × /64 | ARIN | US | 31st Aug 2016 |