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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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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:f59e::/40 | 16.8M × /64 | ARIN |  US | 13th Aug 2025 |
| 2602:f5a1::/40 | 16.8M × /64 | ARIN | US | 7th Aug 2025 |
| 2602:f5a2::/40 | 16.8M × /64 | ARIN |  CA | 6th Aug 2025 |
| 2602:f5a3::/40 | 16.8M × /64 | ARIN | US | 6th Aug 2025 |
| 2602:f5a4::/40 | 16.8M × /64 | ARIN | US | 6th Aug 2025 |
| 2602:f5a6::/40 | 16.8M × /64 | ARIN | US | 5th Aug 2025 |
| 2602:f5a8::/36 | 268M × /64 | ARIN | US | 4th Aug 2025 |
| 2602:f5a9::/36 | 268M × /64 | ARIN | US | 4th Aug 2025 |
| 2602:f5aa::/40 | 16.8M × /64 | ARIN | US | 4th Aug 2025 |
| 2602:f5ab::/40 | 16.8M × /64 | ARIN | US | 4th Aug 2025 |
| 2602:f5ae::/40 | 16.8M × /64 | ARIN | US | 1st Aug 2025 |
| 2602:f5af::/40 | 16.8M × /64 | ARIN | US | 1st Aug 2025 |
| 2602:f5b2::/36 | 268M × /64 | ARIN | CA | 30th Jul 2025 |
| 2602:f5b3::/40 | 16.8M × /64 | ARIN | US | 30th Jul 2025 |
| 2602:f5b4::/40 | 16.8M × /64 | ARIN | US | 30th Jul 2025 |
| 2602:f5b5::/40 | 16.8M × /64 | ARIN | US | 29th Jul 2025 |
| 2602:f5b6::/40 | 16.8M × /64 | ARIN | US | 28th Jul 2025 |
| 2602:f5b7::/40 | 16.8M × /64 | ARIN | US | 25th Jul 2025 |
| 2602:f5b9::/40 | 16.8M × /64 | ARIN | US | 25th Jul 2025 |
| 2602:f5ba::/40 | 16.8M × /64 | ARIN | US | 24th Jul 2025 |
| 2602:f5bb::/36 | 268M × /64 | ARIN | US | 24th Jul 2025 |
| 2602:f5bc::/40 | 16.8M × /64 | ARIN | US | 23rd Jul 2025 |
| 2602:f5bd::/40 | 16.8M × /64 | ARIN | US | 23rd Jul 2025 |
| 2602:f5be::/36 | 268M × /64 | ARIN |  AU | 23rd Jul 2025 |
| 2602:f5bf::/36 | 268M × /64 | ARIN | US | 23rd Jul 2025 |
| 2602:f5c2::/36 | 268M × /64 | ARIN | US | 22nd Jul 2025 |
| 2602:f5c3::/40 | 16.8M × /64 | ARIN | US | 22nd Jul 2025 |
| 2602:f5c4::/40 | 16.8M × /64 | ARIN | US | 22nd Jul 2025 |
| 2602:f5c5::/36 | 268M × /64 | ARIN | CA | 22nd Jul 2025 |
| 2602:f5c7::/36 | 268M × /64 | ARIN | US | 21st Jul 2025 |
| 2602:f5c8::/40 | 16.8M × /64 | ARIN | US | 21st Jul 2025 |
| 2602:f5cb::/40 | 16.8M × /64 | ARIN | US | 21st Jul 2025 |
| 2602:f5cc::/40 | 16.8M × /64 | ARIN | US | 21st Jul 2025 |
| 2602:f5cd::/40 | 16.8M × /64 | ARIN | US | 21st Jul 2025 |
| 2602:f5ce::/40 | 16.8M × /64 | ARIN | US | 18th Jul 2025 |
| 2602:f5cf::/40 | 16.8M × /64 | ARIN | US | 18th Jul 2025 |
| 2602:f5d0::/36 | 268M × /64 | ARIN | US | 18th Jul 2025 |
| 2602:f5d1::/40 | 16.8M × /64 | ARIN |  KR | 17th Jul 2025 |
| 2602:f5d2::/40 | 16.8M × /64 | ARIN | US | 17th Jul 2025 |
| 2602:f5d3::/40 | 16.8M × /64 | ARIN | US | 17th Jul 2025 |
| 2602:f5d4::/40 | 16.8M × /64 | ARIN | US | 17th Jul 2025 |
| 2602:f5d5::/40 | 16.8M × /64 | ARIN | US | 17th Jul 2025 |
| 2602:f5d6::/40 | 16.8M × /64 | ARIN | US | 17th Jul 2025 |
| 2602:f5d7::/36 | 268M × /64 | ARIN | CA | 17th Jul 2025 |
| 2602:f5d8::/36 | 268M × /64 | ARIN | US | 16th Jul 2025 |
| 2602:f5d9::/40 | 16.8M × /64 | ARIN | US | 16th Jul 2025 |
| 2602:f5db::/40 | 16.8M × /64 | ARIN | US | 16th Jul 2025 |
| 2602:f5dc::/40 | 16.8M × /64 | ARIN | US | 15th Jul 2025 |
| 2602:f5dd::/40 | 16.8M × /64 | ARIN | US | 15th Jul 2025 |
| 2602:f5de::/40 | 16.8M × /64 | ARIN | US | 15th Jul 2025 |