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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,432 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2602:f7a6::/40 | 16.8M × /64 | ARIN |  US | 12th Jan 2026 |
| 2602:f7a8::/36 | 268M × /64 | ARIN | US | 7th Nov 2024 |
| 2602:f7a9::/36 | 268M × /64 | ARIN |  JP | 7th Nov 2024 |
| 2602:f7ab::/36 | 268M × /64 | ARIN | US | 6th Nov 2024 |
| 2602:f7ad::/36 | 268M × /64 | ARIN | US | 5th Nov 2024 |
| 2602:f7b0::/40 | 16.8M × /64 | ARIN | US | 5th Nov 2024 |
| 2602:f7b7::/36 | 268M × /64 | ARIN |  VN | 31st Oct 2024 |
| 2602:f7b9::/36 | 268M × /64 | ARIN | US | 30th Oct 2024 |
| 2602:f7ba::/40 | 16.8M × /64 | ARIN | US | 30th Oct 2024 |
| 2602:f7bb::/36 | 268M × /64 | ARIN | US | 29th Oct 2024 |
| 2602:f7bd::/36 | 268M × /64 | ARIN | US | 26th Oct 2024 |
| 2602:f7c1::/36 | 268M × /64 | ARIN | US | 24th Oct 2024 |
| 2602:f7c2::/36 | 268M × /64 | ARIN |  CA | 24th Oct 2024 |
| 2602:f7c3::/40 | 16.8M × /64 | ARIN | US | 24th Oct 2024 |
| 2602:f7c9::/40 | 16.8M × /64 | ARIN | US | 21st Oct 2024 |
| 2602:f7cb::/36 | 268M × /64 | ARIN | US | 18th Oct 2024 |
| 2602:f7cd::/40 | 16.8M × /64 | ARIN | US | 18th Oct 2024 |
| 2602:f7d3::/40 | 16.8M × /64 | ARIN | US | 15th Oct 2024 |
| 2602:f7d5::/32 | 4.3B × /64 | ARIN | JP | 14th Oct 2024 |
| 2602:f7d7::/36 | 268M × /64 | ARIN | US | 11th Oct 2024 |
| 2602:f7d9::/36 | 268M × /64 | ARIN | US | 10th Oct 2024 |
| 2602:f7db::/40 | 16.8M × /64 | ARIN | US | 9th Oct 2024 |
| 2602:f7dd::/36 | 268M × /64 | ARIN | US | 9th Oct 2024 |
| 2602:f7df::/40 | 16.8M × /64 | ARIN | US | 8th Oct 2024 |
| 2602:f7e4::/40 | 16.8M × /64 | ARIN | US | 7th Oct 2024 |
| 2602:f7e5::/40 | 16.8M × /64 | ARIN | US | 7th Oct 2024 |
| 2602:f7e6::/36 | 268M × /64 | ARIN | US | 7th Oct 2024 |
| 2602:f7e8::/36 | 268M × /64 | ARIN | US | 4th Oct 2024 |
| 2602:f7ea::/40 | 16.8M × /64 | ARIN | US | 4th Oct 2024 |
| 2602:f7eb::/40 | 16.8M × /64 | ARIN | US | 4th Oct 2024 |
| 2602:f7ed::/40 | 16.8M × /64 | ARIN | US | 3rd Oct 2024 |
| 2602:f7ef::/36 | 268M × /64 | ARIN | US | 2nd Oct 2024 |
| 2602:f7f1::/40 | 16.8M × /64 | ARIN | US | 2nd Oct 2024 |
| 2602:f7f2::/36 | 268M × /64 | ARIN | US | 1st Oct 2024 |
| 2602:f7f3::/40 | 16.8M × /64 | ARIN | US | 1st Oct 2024 |
| 2602:f7f4::/36 | 268M × /64 | ARIN | CA | 27th Sept 2024 |
| 2602:f7f5::/36 | 268M × /64 | ARIN | US | 26th Sept 2024 |
| 2602:f7f9::/40 | 16.8M × /64 | ARIN | US | 24th Sept 2024 |
| 2602:f7fa::/40 | 16.8M × /64 | ARIN | US | 20th Sept 2024 |
| 2602:f7fd::/36 | 268M × /64 | ARIN | US | 17th Sept 2024 |
| 2602:f801::/36 | 268M × /64 | ARIN | US | 12th Sept 2024 |
| 2602:f807::/40 | 16.8M × /64 | ARIN | US | 9th Sept 2024 |
| 2602:f808::/40 | 16.8M × /64 | ARIN | US | 9th Sept 2024 |
| 2602:f809::/36 | 268M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80a::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80c::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80e::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f80f::/40 | 16.8M × /64 | ARIN | US | 6th Sept 2024 |
| 2602:f810::/40 | 16.8M × /64 | ARIN | US | 5th Sept 2024 |
| 2602:f811::/40 | 16.8M × /64 | ARIN | US | 5th Sept 2024 |