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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
84,424 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2602:f2ad::/36 | 268M × /64 | ARIN |  US | 9th Oct 2026 |
| 2602:f2af::/40 | 16.8M × /64 | ARIN | US | 9th Oct 2026 |
| 2602:f2b0::/40 | 16.8M × /64 | ARIN | US | 8th Oct 2026 |
| 2602:f2b2::/40 | 16.8M × /64 | ARIN |  TH | 8th Oct 2026 |
| 2602:f2b4::/40 | 16.8M × /64 | ARIN | US | 8th Oct 2026 |
| 2602:f2b7::/40 | 16.8M × /64 | ARIN | US | 8th Oct 2026 |
| 2602:f2b8::/36 | 268M × /64 | ARIN | US | 7th Oct 2026 |
| 2602:f2ba::/40 | 16.8M × /64 | ARIN | US | 6th Oct 2026 |
| 2602:f2bb::/40 | 16.8M × /64 | ARIN | US | 6th Oct 2026 |
| 2602:f2bc::/40 | 16.8M × /64 | ARIN |  SG | 6th Oct 2026 |
| 2602:f2bd::/40 | 16.8M × /64 | ARIN | US | 6th Oct 2026 |
| 2602:f2bf::/40 | 16.8M × /64 | ARIN | SG | 2nd Oct 2026 |
| 2602:f2c0::/40 | 16.8M × /64 | ARIN | SG | 2nd Oct 2026 |
| 2602:f2c1::/40 | 16.8M × /64 | ARIN | US | 2nd Oct 2026 |
| 2602:f2c2::/36 | 268M × /64 | ARIN | US | 2nd Oct 2026 |
| 2602:f2c5::/40 | 16.8M × /64 | ARIN | US | 2nd Oct 2026 |
| 2602:f2c6::/36 | 268M × /64 | ARIN | US | 1st Oct 2026 |
| 2602:f2c7::/40 | 16.8M × /64 | ARIN | US | 1st Oct 2026 |
| 2602:f2c9::/36 | 268M × /64 | ARIN |  CA | 30th Sept 2026 |
| 2602:f2ca::/40 | 16.8M × /64 | ARIN | US | 30th Sept 2026 |
| 2602:f2cb::/40 | 16.8M × /64 | ARIN | SG | 30th Sept 2026 |
| 2602:f2cc::/40 | 16.8M × /64 | ARIN | SG | 30th Sept 2026 |
| 2602:f2cd::/40 | 16.8M × /64 | ARIN | SG | 30th Sept 2026 |
| 2602:f2ce::/40 | 16.8M × /64 | ARIN |  MX | 30th Sept 2026 |
| 2602:f2d0::/40 | 16.8M × /64 | ARIN | US | 30th Sept 2026 |
| 2602:f2d1::/36 | 268M × /64 | ARIN | US | 30th Sept 2026 |
| 2602:f2d2::/40 | 16.8M × /64 | ARIN | US | 29th Sept 2026 |
| 2602:f2d6::/40 | 16.8M × /64 | ARIN | US | 25th Sept 2026 |
| 2602:f2d9::/36 | 268M × /64 | ARIN | US | 24th Sept 2026 |
| 2602:f2da::/40 | 16.8M × /64 | ARIN | US | 23rd Sept 2026 |
| 2602:f2db::/40 | 16.8M × /64 | ARIN | US | 23rd Sept 2026 |
| 2602:f2dd::/40 | 16.8M × /64 | ARIN | MX | 22nd Sept 2026 |
| 2602:f2de::/40 | 16.8M × /64 | ARIN | CA | 22nd Sept 2026 |
| 2602:f2df::/40 | 16.8M × /64 | ARIN |  MY | 21st Sept 2026 |
| 2602:f2e1::/40 | 16.8M × /64 | ARIN |  PH | 18th Sept 2026 |
| 2602:f2e3::/40 | 16.8M × /64 | ARIN | CA | 18th Sept 2026 |
| 2602:f2e4::/40 | 16.8M × /64 | ARIN | TH | 18th Sept 2026 |
| 2602:f2e6::/40 | 16.8M × /64 | ARIN | TH | 17th Sept 2026 |
| 2602:f2e7::/40 | 16.8M × /64 | ARIN | US | 17th Sept 2026 |
| 2602:f2e8::/32 | 4.3B × /64 | ARIN | US | 17th Sept 2026 |
| 2602:f2ec::/40 | 16.8M × /64 | ARIN | US | 15th Sept 2026 |
| 2602:f2ed::/40 | 16.8M × /64 | ARIN | US | 15th Sept 2026 |
| 2602:f2ee::/32 | 4.3B × /64 | ARIN | CA | 11th Sept 2026 |
| 2602:f2ef::/40 | 16.8M × /64 | ARIN | US | 11th Sept 2026 |
| 2602:f2f0::/40 | 16.8M × /64 | ARIN | US | 9th Sept 2026 |
| 2602:f2f4::/36 | 268M × /64 | ARIN | US | 2nd Sept 2026 |
| 2602:f2f5::/36 | 268M × /64 | ARIN | US | 2nd Sept 2026 |
| 2602:f2f7::/40 | 16.8M × /64 | ARIN | US | 2nd Sept 2026 |
| 2602:f2f8::/36 | 268M × /64 | ARIN | US | 2nd Sept 2026 |
| 2602:f2f9::/40 | 16.8M × /64 | ARIN | US | 1st Sept 2026 |