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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,256 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 2602:f5df::/36 | 268M × /64 | ARIN | US | 15th Jul 2025 |
| 2602:f5e0::/40 | 16.8M × /64 | ARIN | US | 15th Jul 2025 |
| 2602:f5e1::/40 | 16.8M × /64 | ARIN | US | 14th Jul 2025 |
| 2602:f5e2::/40 | 16.8M × /64 | ARIN | CA | 14th Jul 2025 |
| 2602:f5e3::/36 | 268M × /64 | ARIN | US | 14th Jul 2025 |
| 2602:f5e4::/40 | 16.8M × /64 | ARIN | US | 14th Jul 2025 |
| 2602:f5e6::/40 | 16.8M × /64 | ARIN | US | 11th Jul 2025 |
| 2602:f5e7::/36 | 268M × /64 | ARIN | US | 11th Jul 2025 |
| 2602:f5e9::/40 | 16.8M × /64 | ARIN | US | 10th Jul 2025 |
| 2602:f5ea::/36 | 268M × /64 | ARIN |  VN | 10th Jul 2025 |
| 2602:f5eb::/40 | 16.8M × /64 | ARIN | US | 9th Jul 2025 |
| 2602:f5ec::/36 | 268M × /64 | ARIN | US | 8th Jul 2025 |
| 2602:f5ed::/40 | 16.8M × /64 | ARIN | US | 8th Jul 2025 |
| 2602:f5f0::/40 | 16.8M × /64 | ARIN | US | 8th Jul 2025 |
| 2602:f5f1::/40 | 16.8M × /64 | ARIN |  HK | 8th Jul 2025 |
| 2602:f5f2::/40 | 16.8M × /64 | ARIN | US | 8th Jul 2025 |
| 2602:f5f3::/40 | 16.8M × /64 | ARIN |  TH | 8th Jul 2025 |
| 2602:f5f4::/40 | 16.8M × /64 | ARIN | US | 8th Jul 2025 |
| 2602:f5f5::/40 | 16.8M × /64 | ARIN | US | 8th Jul 2025 |
| 2602:f5f7::/40 | 16.8M × /64 | ARIN | US | 3rd Jul 2025 |
| 2602:f5f8::/36 | 268M × /64 | ARIN | US | 3rd Jul 2025 |
| 2602:f5f9::/40 | 16.8M × /64 | ARIN | US | 2nd Jul 2025 |
| 2602:f5fa::/40 | 16.8M × /64 | ARIN | US | 1st Jul 2025 |
| 2602:f5fb::/40 | 16.8M × /64 | ARIN | US | 1st Jul 2025 |
| 2602:f5fc::/40 | 16.8M × /64 | ARIN | US | 1st Jul 2025 |
| 2602:f5fd::/40 | 16.8M × /64 | ARIN | US | 1st Jul 2025 |
| 2602:f5fe::/40 | 16.8M × /64 | ARIN | US | 30th Jun 2025 |
| 2602:f5ff::/40 | 16.8M × /64 | ARIN | US | 30th Jun 2025 |
| 2602:f600::/40 | 16.8M × /64 | ARIN | US | 30th Jun 2025 |
| 2602:f602::/40 | 16.8M × /64 | ARIN | US | 30th Jun 2025 |
| 2602:f603::/40 | 16.8M × /64 | ARIN | US | 27th Jun 2025 |
| 2602:f604::/36 | 268M × /64 | ARIN | US | 27th Jun 2025 |
| 2602:f606::/40 | 16.8M × /64 | ARIN | US | 27th Jun 2025 |
| 2602:f607::/40 | 16.8M × /64 | ARIN | US | 27th Jun 2025 |
| 2602:f60a::/40 | 16.8M × /64 | ARIN | US | 25th Jun 2025 |