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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 the most unannounced blocks, largest first.
Unannounced blocks
84,555 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a11:1d80::/29 | 34.4B × /64 | RIPE NCC | 13th Aug 2021 | |
| 2a11:1dc0::/29 | 34.4B × /64 | RIPE NCC | 5th Dec 2025 | |
| 2a11:1e00::/29 | 34.4B × /64 | RIPE NCC | 15th Jul 2021 | |
| 2a11:1f00::/29 | 34.4B × /64 | RIPE NCC | 27th Jul 2021 | |
| 2a11:1f80::/29 | 34.4B × /64 | RIPE NCC | 8th Feb 2024 | |
| 2a11:20c0::/29 | 34.4B × /64 | RIPE NCC | 16th Sept 2021 | |
| 2a11:2140::/29 | 34.4B × /64 | RIPE NCC | 16th Sept 2021 | |
| 2a11:2180::/29 | 34.4B × /64 | RIPE NCC | 13th Aug 2021 | |
| 2a11:21c0::/29 | 34.4B × /64 | RIPE NCC | 16th Sept 2021 | |
| 2a11:2200::/29 | 34.4B × /64 | RIPE NCC | 15th Jul 2021 | |
| 2a11:2380::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2021 | |
| 2a11:2400::/29 | 34.4B × /64 | RIPE NCC | 8th Jul 2021 | |
| 2a11:2480::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2021 | |
| 2a11:24c0::/29 | 34.4B × /64 | RIPE NCC | 17th Sept 2021 | |
| 2a11:2500::/29 | 34.4B × /64 | RIPE NCC | 28th Jul 2021 | |
| 2a11:2580::/32 | 4.3B × /64 | RIPE NCC | 16th Aug 2021 | |
| 2a11:25c0::/29 | 34.4B × /64 | RIPE NCC | 17th Sept 2021 | |
| 2a11:2600::/29 | 34.4B × /64 | RIPE NCC | 16th Jul 2021 | |
| 2a11:2680::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2021 | |
| 2a11:2700::/29 | 34.4B × /64 | RIPE NCC | 28th Jul 2021 | |
| 2a11:2740::/29 | 34.4B × /64 | RIPE NCC | 17th Sept 2021 | |
| 2a11:2880::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2021 | |
| 2a11:2980::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2021 | |
| 2a11:2a00::/29 | 34.4B × /64 | RIPE NCC | 16th Jul 2021 | |
| 2a11:2a40::/29 | 34.4B × /64 | RIPE NCC | 20th Sept 2021 | |
| 2a11:2ac0::/29 | 34.4B × /64 | RIPE NCC | 20th Sept 2021 | |
| 2a11:2c40::/29 | 34.4B × /64 | RIPE NCC | 20th Sept 2021 | |
| 2a11:2d40::/29 | 34.4B × /64 | RIPE NCC | 20th Sept 2021 | |
| 2a11:2f80::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2021 | |
| 2a11:2fc0::/32 | 4.3B × /64 | RIPE NCC | 21st Sept 2021 | |
| 2a11:300::/29 | 34.4B × /64 | RIPE NCC | 16th Feb 2026 | |
| 2a11:3080::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2021 | |
| 2a11:30c0::/29 | 34.4B × /64 | RIPE NCC | 21st Sept 2021 | |
| 2a11:3100::/29 | 34.4B × /64 | RIPE NCC | 29th Jul 2021 | |
| 2a11:3140::/29 | 34.4B × /64 | RIPE NCC | 21st Sept 2021 | |
| 2a11:3200::/29 | 34.4B × /64 | RIPE NCC | 16th Jul 2021 | |
| 2a11:3280::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2021 | |
| 2a11:32c0::/29 | 34.4B × /64 | RIPE NCC | 21st Sept 2021 | |
| 2a11:3300::/29 | 34.4B × /64 | RIPE NCC | 29th Jul 2021 | |
| 2a11:33c0::/29 | 34.4B × /64 | RIPE NCC | 21st Sept 2021 | |
| 2a11:3400::/29 | 34.4B × /64 | RIPE NCC | 8th Jul 2021 | |
| 2a11:3440::/29 | 34.4B × /64 | RIPE NCC | 21st Sept 2021 | |
| 2a11:3480::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2021 | |
| 2a11:35c0::/29 | 34.4B × /64 | RIPE NCC | 22nd Sept 2021 | |
| 2a11:3600::/29 | 34.4B × /64 | RIPE NCC | 7th Nov 2025 | |
| 2a11:3640::/29 | 34.4B × /64 | RIPE NCC | 18th Feb 2026 | |
| 2a11:3680::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2021 | |
| 2a11:3700::/29 | 34.4B × /64 | RIPE NCC | 29th Jul 2021 | |
| 2a11:3800::/29 | 34.4B × /64 | RIPE NCC | 6th Jul 2021 | |
| 2a11:3880::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2021 |