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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,432 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2602:f682::/36 | 268M × /64 | ARIN |  US | 14th Apr 2025 |
| 2602:f686::/40 | 16.8M × /64 | ARIN | US | 11th Apr 2025 |
| 2602:f68b::/40 | 16.8M × /64 | ARIN | US | 9th Apr 2025 |
| 2602:f68c::/40 | 16.8M × /64 | ARIN | US | 9th Apr 2025 |
| 2602:f68d::/40 | 16.8M × /64 | ARIN | US | 9th Apr 2025 |
| 2602:f68e::/40 | 16.8M × /64 | ARIN | US | 8th Apr 2025 |
| 2602:f690::/40 | 16.8M × /64 | ARIN | US | 4th Apr 2025 |
| 2602:f691::/40 | 16.8M × /64 | ARIN | US | 9th Jan 2026 |
| 2602:f693::/40 | 16.8M × /64 | ARIN | US | 3rd Apr 2025 |
| 2602:f694::/40 | 16.8M × /64 | ARIN | US | 3rd Apr 2025 |
| 2602:f695::/40 | 16.8M × /64 | ARIN | US | 3rd Apr 2025 |
| 2602:f699::/36 | 268M × /64 | ARIN | US | 2nd Apr 2025 |
| 2602:f69b::/36 | 268M × /64 | ARIN | US | 31st Mar 2025 |
| 2602:f69d::/40 | 16.8M × /64 | ARIN | US | 31st Mar 2025 |
| 2602:f69e::/40 | 16.8M × /64 | ARIN | US | 31st Mar 2025 |
| 2602:f69f::/40 | 16.8M × /64 | ARIN |  CA | 31st Mar 2025 |
| 2602:f6a1::/40 | 16.8M × /64 | ARIN | US | 28th Mar 2025 |
| 2602:f6a2::/40 | 16.8M × /64 | ARIN | US | 28th Mar 2025 |
| 2602:f6a3::/40 | 16.8M × /64 | ARIN | US | 28th Mar 2025 |
| 2602:f6a4::/40 | 16.8M × /64 | ARIN | US | 27th Mar 2025 |
| 2602:f6a6::/40 | 16.8M × /64 | ARIN | US | 26th Mar 2025 |
| 2602:f6a9::/36 | 268M × /64 | ARIN | US | 25th Mar 2025 |
| 2602:f6aa::/36 | 268M × /64 | ARIN | CA | 24th Mar 2025 |
| 2602:f6ab::/40 | 16.8M × /64 | ARIN | US | 21st Mar 2025 |
| 2602:f6ad::/40 | 16.8M × /64 | ARIN | US | 21st Mar 2025 |
| 2602:f6b2::/40 | 16.8M × /64 | ARIN | US | 19th Mar 2025 |
| 2602:f6b3::/36 | 268M × /64 | ARIN | US | 19th Mar 2025 |
| 2602:f6b4::/40 | 16.8M × /64 | ARIN | CA | 19th Mar 2025 |
| 2602:f6b7::/40 | 16.8M × /64 | ARIN | US | 18th Mar 2025 |
| 2602:f6b9::/40 | 16.8M × /64 | ARIN | US | 17th Mar 2025 |
| 2602:f6bd::/40 | 16.8M × /64 | ARIN | US | 13th Mar 2025 |
| 2602:f6be::/40 | 16.8M × /64 | ARIN | US | 13th Mar 2025 |
| 2602:f6c5::/40 | 16.8M × /64 | ARIN | US | 10th Mar 2025 |
| 2602:f6c7::/36 | 268M × /64 | ARIN | US | 7th Mar 2025 |
| 2602:f6c9::/40 | 16.8M × /64 | ARIN | US | 4th Mar 2025 |
| 2602:f6ce::/40 | 16.8M × /64 | ARIN | US | 27th Feb 2025 |
| 2602:f6cf::/36 | 268M × /64 | ARIN | US | 25th Feb 2025 |
| 2602:f6d2::/40 | 16.8M × /64 | ARIN | US | 21st Feb 2025 |
| 2602:f6d3::/40 | 16.8M × /64 | ARIN | US | 21st Feb 2025 |
| 2602:f6d5::/40 | 16.8M × /64 | ARIN | US | 21st Feb 2025 |
| 2602:f6d9::/40 | 16.8M × /64 | ARIN | US | 20th Feb 2025 |
| 2602:f6da::/40 | 16.8M × /64 | ARIN | US | 20th Feb 2025 |
| 2602:f6dd::/40 | 16.8M × /64 | ARIN | US | 18th Feb 2025 |
| 2602:f6de::/40 | 16.8M × /64 | ARIN | US | 18th Feb 2025 |
| 2602:f6df::/40 | 16.8M × /64 | ARIN | US | 18th Feb 2025 |
| 2602:f6e1::/40 | 16.8M × /64 | ARIN | US | 14th Feb 2025 |
| 2602:f6e2::/36 | 268M × /64 | ARIN | US | 14th Feb 2025 |
| 2602:f6e5::/40 | 16.8M × /64 | ARIN | US | 13th Feb 2025 |
| 2602:f6e6::/40 | 16.8M × /64 | ARIN | US | 12th Feb 2025 |
| 2602:f6e7::/40 | 16.8M × /64 | ARIN | US | 12th Feb 2025 |