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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,001 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a12:3180::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:31c0::/29 | 34.4B × /64 | RIPE NCC | 28th Dec 2021 | |
| 2a12:3280::/32 | 4.3B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:3340::/29 | 34.4B × /64 | RIPE NCC | 28th Dec 2021 | |
| 2a12:3380::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:3480::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:3500::/29 | 34.4B × /64 | RIPE NCC | 11th Nov 2021 | |
| 2a12:3680::/32 | 4.3B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:36c0::/29 | 34.4B × /64 | RIPE NCC | 3rd Jan 2022 | |
| 2a12:3740::/29 | 34.4B × /64 | RIPE NCC | 3rd Jan 2022 | |
| 2a12:3780::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:37c0::/29 | 34.4B × /64 | RIPE NCC | 23rd Feb 2026 | |
| 2a12:3800::/29 | 34.4B × /64 | RIPE NCC | 29th Oct 2021 | |
| 2a12:3840::/29 | 34.4B × /64 | RIPE NCC | 4th Jan 2022 | |
| 2a12:3880::/32 | 4.3B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:3900::/29 | 34.4B × /64 | RIPE NCC | 11th Nov 2021 | |
| 2a12:3980::/29 | 34.4B × /64 | RIPE NCC | 16th Dec 2025 | |
| 2a12:3a00::/29 | 34.4B × /64 | RIPE NCC | 4th Nov 2021 | |
| 2a12:3a40::/32 | 4.3B × /64 | RIPE NCC | 23rd Feb 2026 | |
| 2a12:3c40::/29 | 34.4B × /64 | RIPE NCC | 5th Jan 2022 | |
| 2a12:3e00::/29 | 34.4B × /64 | RIPE NCC | 4th Nov 2021 | |
| 2a12:3e40::/29 | 34.4B × /64 | RIPE NCC | 5th Jan 2022 | |
| 2a12:3ec0::/29 | 34.4B × /64 | RIPE NCC | 5th Jan 2022 | |
| 2a12:3f80::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:400::/29 | 34.4B × /64 | RIPE NCC | 2nd Nov 2021 | |
| 2a12:4080::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:40::/29 | 34.4B × /64 | RIPE NCC | 10th Dec 2021 | |
| 2a12:4100::/29 | 34.4B × /64 | RIPE NCC | 11th Nov 2021 | |
| 2a12:4280::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:4300::/29 | 34.4B × /64 | RIPE NCC | 11th Nov 2021 | |
| 2a12:4380::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:43c0::/29 | 34.4B × /64 | RIPE NCC | 6th Jan 2022 | |
| 2a12:4400::/29 | 34.4B × /64 | RIPE NCC | 2nd Nov 2021 | |
| 2a12:4580::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:45c0::/29 | 34.4B × /64 | RIPE NCC | 7th Jan 2022 | |
| 2a12:46c0::/29 | 34.4B × /64 | RIPE NCC | 7th Jan 2022 | |
| 2a12:4780::/32 | 4.3B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:47c0::/29 | 34.4B × /64 | RIPE NCC | 7th Jan 2022 | |
| 2a12:4800::/29 | 34.4B × /64 | RIPE NCC | 29th Oct 2021 | |
| 2a12:480::/29 | 34.4B × /64 | RIPE NCC | 18th Nov 2021 | |
| 2a12:4880::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:4900::/29 | 34.4B × /64 | RIPE NCC | 11th Nov 2021 | |
| 2a12:4a00::/29 | 34.4B × /64 | RIPE NCC | 5th Nov 2021 | |
| 2a12:4a40::/29 | 34.4B × /64 | RIPE NCC | 10th Jan 2022 | |
| 2a12:4a80::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:4b40::/29 | 34.4B × /64 | RIPE NCC | 10th Jan 2022 | |
| 2a12:4b80::/29 | 34.4B × /64 | RIPE NCC | 22nd Nov 2021 | |
| 2a12:4e40::/29 | 34.4B × /64 | RIPE NCC | 11th Jan 2022 | |
| 2a12:4ec0::/29 | 34.4B × /64 | RIPE NCC | 11th Jan 2022 | |
| 2a12:4f40::/29 | 34.4B × /64 | RIPE NCC | 11th Jan 2022 |