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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 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:f46c::/40 | 16.8M × /64 | ARIN |  US | 6th Feb 2026 |
| 2602:f46e::/36 | 268M × /64 | ARIN | US | 6th Feb 2026 |
| 2602:f46f::/40 | 16.8M × /64 | ARIN | US | 5th Feb 2026 |
| 2602:f471::/40 | 16.8M × /64 | ARIN | US | 8th Jan 2026 |
| 2602:f477::/40 | 16.8M × /64 | ARIN | US | 6th Jan 2026 |
| 2602:f47b::/40 | 16.8M × /64 | ARIN | US | 30th Dec 2025 |
| 2602:f47c::/40 | 16.8M × /64 | ARIN | US | 30th Dec 2025 |
| 2602:f47d::/40 | 16.8M × /64 | ARIN | US | 30th Dec 2025 |
| 2602:f47e::/36 | 268M × /64 | ARIN | US | 29th Dec 2025 |
| 2602:f47f::/40 | 16.8M × /64 | ARIN | US | 29th Dec 2025 |
| 2602:f482::/40 | 16.8M × /64 | ARIN | US | 24th Dec 2025 |
| 2602:f485::/36 | 268M × /64 | ARIN | US | 23rd Dec 2025 |
| 2602:f487::/40 | 16.8M × /64 | ARIN | US | 23rd Dec 2025 |
| 2602:f489::/40 | 16.8M × /64 | ARIN | US | 22nd Dec 2025 |
| 2602:f48a::/40 | 16.8M × /64 | ARIN | US | 19th Dec 2025 |
| 2602:f48e::/40 | 16.8M × /64 | ARIN | US | 17th Dec 2025 |
| 2602:f48f::/40 | 16.8M × /64 | ARIN | US | 17th Dec 2025 |
| 2602:f492::/40 | 16.8M × /64 | ARIN | US | 16th Dec 2025 |
| 2602:f493::/36 | 268M × /64 | ARIN | US | 16th Dec 2025 |
| 2602:f495::/40 | 16.8M × /64 | ARIN | US | 16th Dec 2025 |
| 2602:f496::/40 | 16.8M × /64 | ARIN | US | 16th Dec 2025 |
| 2602:f497::/40 | 16.8M × /64 | ARIN | US | 16th Dec 2025 |
| 2602:f498::/40 | 16.8M × /64 | ARIN | US | 12th Dec 2025 |
| 2602:f499::/40 | 16.8M × /64 | ARIN | US | 12th Dec 2025 |
| 2602:f49a::/40 | 16.8M × /64 | ARIN | US | 11th Dec 2025 |
| 2602:f49c::/40 | 16.8M × /64 | ARIN | US | 10th Dec 2025 |
| 2602:f49d::/40 | 16.8M × /64 | ARIN | US | 9th Dec 2025 |
| 2602:f49e::/40 | 16.8M × /64 | ARIN | US | 9th Dec 2025 |
| 2602:f49f::/40 | 16.8M × /64 | ARIN |  CA | 9th Dec 2025 |
| 2602:f4a0::/40 | 16.8M × /64 | ARIN | US | 8th Dec 2025 |
| 2602:f4a1::/40 | 16.8M × /64 | ARIN | US | 8th Dec 2025 |
| 2602:f4a2::/36 | 268M × /64 | ARIN | US | 5th Dec 2025 |
| 2602:f4a4::/40 | 16.8M × /64 | ARIN | US | 4th Dec 2025 |
| 2602:f4a5::/40 | 16.8M × /64 | ARIN | US | 4th Dec 2025 |
| 2602:f4a6::/40 | 16.8M × /64 | ARIN | US | 4th Dec 2025 |
| 2602:f4a7::/40 | 16.8M × /64 | ARIN | US | 4th Dec 2025 |
| 2602:f4a9::/36 | 268M × /64 | ARIN | US | 3rd Dec 2025 |
| 2602:f4aa::/40 | 16.8M × /64 | ARIN | US | 3rd Dec 2025 |
| 2602:f4ac::/40 | 16.8M × /64 | ARIN | US | 1st Dec 2025 |
| 2602:f4ad::/40 | 16.8M × /64 | ARIN | US | 1st Dec 2025 |
| 2602:f4ae::/40 | 16.8M × /64 | ARIN | US | 1st Dec 2025 |
| 2602:f4af::/40 | 16.8M × /64 | ARIN | US | 1st Dec 2025 |
| 2602:f4b0::/40 | 16.8M × /64 | ARIN | US | 25th Nov 2025 |
| 2602:f4b1::/40 | 16.8M × /64 | ARIN | CA | 25th Nov 2025 |
| 2602:f4b2::/40 | 16.8M × /64 | ARIN | US | 25th Nov 2025 |
| 2602:f4b3::/40 | 16.8M × /64 | ARIN | US | 25th Nov 2025 |
| 2602:f4b4::/40 | 16.8M × /64 | ARIN | US | 25th Nov 2025 |
| 2602:f4b5::/40 | 16.8M × /64 | ARIN | US | 25th Nov 2025 |
| 2602:f4b6::/40 | 16.8M × /64 | ARIN | US | 25th Nov 2025 |
| 2602:f4b7::/40 | 16.8M × /64 | ARIN | US | 25th Nov 2025 |