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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2a0e:3c00::/29 | 34.4B × /64 | RIPE NCC | 9th Apr 2019 | |
| 2a0e:3cc0::/29 | 34.4B × /64 | RIPE NCC | 11th Jul 2019 | |
| 2a0e:3d00::/29 | 34.4B × /64 | RIPE NCC | 25th Apr 2019 | |
| 2a0e:3d40::/29 | 34.4B × /64 | RIPE NCC | 11th Jul 2019 | |
| 2a0e:3e00::/29 | 34.4B × /64 | RIPE NCC | 12th Apr 2019 | |
| 2a0e:3e40::/29 | 34.4B × /64 | RIPE NCC | 11th Jul 2019 | |
| 2a0e:3f40::/29 | 34.4B × /64 | RIPE NCC | 11th Jul 2019 | |
| 2a0e:4040::/29 | 34.4B × /64 | RIPE NCC | 12th Jul 2019 | |
| 2a0e:4140::/29 | 34.4B × /64 | RIPE NCC | 12th Jul 2019 | |
| 2a0e:4240::/29 | 34.4B × /64 | RIPE NCC | 12th Jul 2019 | |
| 2a0e:4300::/30 | 17.2B × /64 | RIPE NCC | 25th Apr 2019 | |
| 2a0e:4400::/29 | 34.4B × /64 | RIPE NCC | 5th Apr 2019 | |
| 2a0e:4440::/29 | 34.4B × /64 | RIPE NCC | 15th Jul 2019 | |
| 2a0e:4480::/29 | 34.4B × /64 | RIPE NCC | 19th Sept 2025 | |
| 2a0e:4500::/29 | 34.4B × /64 | RIPE NCC | 25th Apr 2019 | |
| 2a0e:45c0::/29 | 34.4B × /64 | RIPE NCC | 13th Oct 2025 | |
| 2a0e:4600::/29 | 34.4B × /64 | RIPE NCC | 12th Apr 2019 | |
| 2a0e:4640::/29 | 34.4B × /64 | RIPE NCC | 15th Jul 2019 | |
| 2a0e:4700::/29 | 34.4B × /64 | RIPE NCC | 25th Apr 2019 | |
| 2a0e:4740::/29 | 34.4B × /64 | RIPE NCC | 15th Jul 2019 | |
| 2a0e:4780::/29 | 34.4B × /64 | RIPE NCC | 16th May 2019 | |
| 2a0e:4800::/29 | 34.4B × /64 | RIPE NCC | 4th Apr 2019 | |
| 2a0e:4880::/29 | 34.4B × /64 | RIPE NCC | 16th May 2019 | |
| 2a0e:4900::/29 | 34.4B × /64 | RIPE NCC | 25th Apr 2019 | |
| 2a0e:49c0::/32 | 4.3B × /64 | RIPE NCC | 15th Jul 2019 | |
| 2a0e:4a00::/29 | 34.4B × /64 | RIPE NCC | 7th Sept 2026 | |
| 2a0e:4a40::/29 | 34.4B × /64 | RIPE NCC | 15th Jul 2019 | |
| 2a0e:4a80::/29 | 34.4B × /64 | RIPE NCC | 16th May 2019 | |
| 2a0e:4b80::/29 | 34.4B × /64 | RIPE NCC | 30th Dec 2021 | |
| 2a0e:4dc0::/29 | 34.4B × /64 | RIPE NCC | 16th Jul 2019 | |
| 2a0e:4e00::/29 | 34.4B × /64 | RIPE NCC | 12th Apr 2019 | |
| 2a0e:4e80::/29 | 34.4B × /64 | RIPE NCC | 17th May 2019 | |
| 2a0e:4f40::/29 | 34.4B × /64 | RIPE NCC | 16th Jul 2019 | |
| 2a0e:50c0::/29 | 34.4B × /64 | RIPE NCC | 27th Sept 2022 | |
| 2a0e:5100::/29 | 34.4B × /64 | RIPE NCC | 25th Apr 2019 | |
| 2a0e:51c0::/29 | 34.4B × /64 | RIPE NCC | 17th Jul 2019 | |
| 2a0e:5200::/29 | 34.4B × /64 | RIPE NCC | 12th Apr 2019 | |
| 2a0e:5240::/29 | 34.4B × /64 | RIPE NCC | 17th Jul 2019 | |
| 2a0e:52c0::/29 | 34.4B × /64 | RIPE NCC | 18th Jan 2022 | |
| 2a0e:5300::/29 | 34.4B × /64 | RIPE NCC | 25th Apr 2019 | |
| 2a0e:53c0::/29 | 34.4B × /64 | RIPE NCC | 17th Jul 2019 | |
| 2a0e:5400::/29 | 34.4B × /64 | RIPE NCC | 8th Apr 2019 | |
| 2a0e:5440::/29 | 34.4B × /64 | RIPE NCC | 17th Jul 2019 | |
| 2a0e:54c0::/29 | 34.4B × /64 | RIPE NCC | 17th Jul 2019 | |
| 2a0e:5580::/29 | 34.4B × /64 | RIPE NCC | 16th Oct 2025 | |
| 2a0e:55c0::/29 | 34.4B × /64 | RIPE NCC | 27th Sept 2022 | |
| 2a0e:5600::/29 | 34.4B × /64 | RIPE NCC | 12th Apr 2019 | |
| 2a0e:56c0::/29 | 34.4B × /64 | RIPE NCC | 18th Jul 2019 | |
| 2a0e:5700::/32 | 4.3B × /64 | RIPE NCC | 26th Apr 2019 | |
| 2a0e:5740::/29 | 34.4B × /64 | RIPE NCC | 18th Jul 2019 |