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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2a0d:b800::/29 | 34.4B × /64 | RIPE NCC | 2nd Oct 2017 | |
| 2a0d:b8c0::/29 | 34.4B × /64 | RIPE NCC | 9th Oct 2018 | |
| 2a0d:b980::/29 | 34.4B × /64 | RIPE NCC | 27th Feb 2018 | |
| 2a0d:ba00::/29 | 34.4B × /64 | RIPE NCC | 2nd Nov 2017 | |
| 2a0d:ba40::/29 | 34.4B × /64 | RIPE NCC | 9th Oct 2018 | |
| 2a0d:ba80::/29 | 34.4B × /64 | RIPE NCC | 28th Feb 2018 | |
| 2a0d:bb00::/29 | 34.4B × /64 | RIPE NCC | 12th Dec 2017 | |
| 2a0d:bb80::/29 | 34.4B × /64 | RIPE NCC | 28th Feb 2018 | |
| 2a0d:bc00::/29 | 34.4B × /64 | RIPE NCC | 12th Oct 2017 | |
| 2a0d:bc40::/30 | 17.2B × /64 | RIPE NCC | 10th Oct 2018 | |
| 2a0d:bc80::/29 | 34.4B × /64 | RIPE NCC | 28th Feb 2018 | |
| 2a0d:bd00::/29 | 34.4B × /64 | RIPE NCC | 12th Dec 2017 | |
| 2a0d:bd40::/29 | 34.4B × /64 | RIPE NCC | 10th Oct 2018 | |
| 2a0d:bd80::/29 | 34.4B × /64 | RIPE NCC | 1st Mar 2018 | |
| 2a0d:bdc0::/29 | 34.4B × /64 | RIPE NCC | 10th Oct 2018 | |
| 2a0d:be00::/29 | 34.4B × /64 | RIPE NCC | 17th Jun 2021 | |
| 2a0d:be80::/29 | 34.4B × /64 | RIPE NCC | 1st Mar 2018 | |
| 2a0d:bec0::/29 | 34.4B × /64 | RIPE NCC | 11th Oct 2018 | |
| 2a0d:bf40::/29 | 34.4B × /64 | RIPE NCC | 11th Oct 2018 | |
| 2a0d:bf80::/29 | 34.4B × /64 | RIPE NCC | 3rd Sept 2026 | |
| 2a0d:c0::/29 | 34.4B × /64 | RIPE NCC | 19th Aug 2026 | |
| 2a0d:c140::/29 | 34.4B × /64 | RIPE NCC | 28th Apr 2021 | |
| 2a0d:c180::/32 | 4.3B × /64 | RIPE NCC | 4th Sept 2026 | |
| 2a0d:c1c0::/29 | 34.4B × /64 | RIPE NCC | 11th Oct 2018 | |
| 2a0d:c200::/29 | 34.4B × /64 | RIPE NCC | 2nd Nov 2017 | |
| 2a0d:c240::/29 | 34.4B × /64 | RIPE NCC | 11th Oct 2018 | |
| 2a0d:c280::/29 | 34.4B × /64 | RIPE NCC | 1st Mar 2018 | |
| 2a0d:c300::/29 | 34.4B × /64 | RIPE NCC | 13th Dec 2017 | |
| 2a0d:c380::/29 | 34.4B × /64 | RIPE NCC | 1st Mar 2018 | |
| 2a0d:c3c0::/29 | 34.4B × /64 | RIPE NCC | 12th Oct 2018 | |
| 2a0d:c40::/29 | 34.4B × /64 | RIPE NCC | 3rd Aug 2018 | |
| 2a0d:c4c0::/29 | 34.4B × /64 | RIPE NCC | 12th Oct 2018 | |
| 2a0d:c540::/29 | 34.4B × /64 | RIPE NCC | 12th Sept 2025 | |
| 2a0d:c640::/29 | 34.4B × /64 | RIPE NCC | 15th Oct 2018 | |
| 2a0d:c700::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2020 | |
| 2a0d:c780::/29 | 34.4B × /64 | RIPE NCC | 2nd Mar 2018 | |
| 2a0d:c800::/29 | 34.4B × /64 | RIPE NCC | 2nd Oct 2017 | |
| 2a0d:c840::/29 | 34.4B × /64 | RIPE NCC | 15th Oct 2018 | |
| 2a0d:c880::/29 | 34.4B × /64 | RIPE NCC | 2nd Mar 2018 | |
| 2a0d:c900::/29 | 34.4B × /64 | RIPE NCC | 13th Dec 2017 | |
| 2a0d:c940::/29 | 34.4B × /64 | RIPE NCC | 15th Oct 2018 | |
| 2a0d:c980::/29 | 34.4B × /64 | RIPE NCC | 2nd Mar 2018 | |
| 2a0d:ca80::/29 | 34.4B × /64 | RIPE NCC | 2nd Mar 2018 | |
| 2a0d:cb00::/29 | 34.4B × /64 | RIPE NCC | 12th Sept 2025 | |
| 2a0d:cb40::/29 | 34.4B × /64 | RIPE NCC | 16th Oct 2018 | |
| 2a0d:cc00::/29 | 34.4B × /64 | RIPE NCC | 13th Oct 2017 | |
| 2a0d:cc40::/29 | 34.4B × /64 | RIPE NCC | 16th Oct 2018 | |
| 2a0d:ccc0::/29 | 34.4B × /64 | RIPE NCC | 23rd Jan 2020 | |
| 2a0d:cd00::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2020 | |
| 2a0d:cd40::/29 | 34.4B × /64 | RIPE NCC | 16th Oct 2018 |