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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through ARIN, largest first.
Unannounced blocks in United States
26,289 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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:f790::/36 | 268M × /64 | ARIN | US | 20th Nov 2024 |
| 2602:f792::/36 | 268M × /64 | ARIN | US | 19th 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: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: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: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: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 |
| 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: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:f7f5::/36 | 268M × /64 | ARIN | US | 26th Sept 2024 |
| 2602:f7f9::/40 | 16.8M × /64 | ARIN | US | 24th Sept 2024 |