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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through ARIN, largest first.
Unannounced blocks registered through ARIN
30,449 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2602:f77b::/36 | 268M × /64 | ARIN |  US | 3rd Dec 2024 |
| 2602:f77d::/36 | 268M × /64 | ARIN | US | 2nd Dec 2024 |
| 2602:f77f::/40 | 16.8M × /64 | ARIN | US | 27th Nov 2024 |
| 2602:f780::/36 | 268M × /64 | ARIN |  JP | 27th Nov 2024 |
| 2602:f785::/36 | 268M × /64 | ARIN | US | 22nd Nov 2024 |
| 2602:f786::/36 | 268M × /64 | ARIN | US | 22nd Nov 2024 |
| 2602:f787::/40 | 16.8M × /64 | ARIN | US | 22nd Nov 2024 |
| 2602:f789::/40 | 16.8M × /64 | ARIN | US | 22nd Nov 2024 |
| 2602:f78c::/36 | 268M × /64 | ARIN | US | 21st Nov 2024 |
| 2602:f78d::/36 | 268M × /64 | ARIN |  CA | 21st Nov 2024 |
| 2602:f78e::/36 | 268M × /64 | ARIN |  VN | 20th Nov 2024 |
| 2602:f790::/36 | 268M × /64 | ARIN | US | 20th Nov 2024 |
| 2602:f792::/36 | 268M × /64 | ARIN | US | 19th Nov 2024 |
| 2602:f796::/40 | 16.8M × /64 | ARIN | JP | 18th Nov 2024 |
| 2602:f798::/40 | 16.8M × /64 | ARIN | US | 18th Nov 2024 |
| 2602:f799::/40 | 16.8M × /64 | ARIN | US | 15th Nov 2024 |
| 2602:f79b::/36 | 268M × /64 | ARIN | US | 14th Nov 2024 |
| 2602:f79c::/40 | 16.8M × /64 | ARIN | US | 14th Nov 2024 |
| 2602:f79d::/36 | 268M × /64 | ARIN | US | 14th Nov 2024 |
| 2602:f79e::/40 | 16.8M × /64 | ARIN | US | 12th Nov 2024 |
| 2602:f79f::/36 | 268M × /64 | ARIN |  PR | 12th Nov 2024 |
| 2602:f7a0::/36 | 268M × /64 | ARIN | CA | 12th Nov 2024 |
| 2602:f7a1::/40 | 16.8M × /64 | ARIN | US | 12th Nov 2024 |
| 2602:f7a2::/36 | 268M × /64 | ARIN | US | 12th Nov 2024 |
| 2602:f7a4::/40 | 16.8M × /64 | ARIN | US | 12th Nov 2024 |
| 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:f7bb::/36 | 268M × /64 | ARIN | US | 29th Oct 2024 |
| 2602:f7bc::/40 | 16.8M × /64 | ARIN | US | 29th Oct 2024 |
| 2602:f7bd::/36 | 268M × /64 | ARIN | US | 26th Oct 2024 |
| 2602:f7c0::/40 | 16.8M × /64 | ARIN | US | 25th 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:f7ce::/40 | 16.8M × /64 | ARIN | US | 18th Oct 2024 |
| 2602:f7d2::/40 | 16.8M × /64 | ARIN | US | 15th Oct 2024 |
| 2602:f7d3::/40 | 16.8M × /64 | ARIN | US | 15th 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 |