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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,545 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a0d:1340::/29 | 34.4B × /64 | RIPE NCC | 8th Aug 2018 | |
| 2a0d:13c0::/29 | 34.4B × /64 | RIPE NCC | 8th Aug 2018 | |
| 2a0d:1400::/30 | 17.2B × /64 | RIPE NCC | 6th Oct 2017 | |
| 2a0d:140::/29 | 34.4B × /64 | RIPE NCC | 1st Aug 2018 | |
| 2a0d:1480::/29 | 34.4B × /64 | RIPE NCC | 27th Jul 2020 | |
| 2a0d:1500::/32 | 4.3B × /64 | RIPE NCC | 29th Nov 2017 | |
| 2a0d:1540::/29 | 34.4B × /64 | RIPE NCC | 8th Aug 2018 | |
| 2a0d:15c0::/32 | 4.3B × /64 | RIPE NCC | 8th Aug 2018 | |
| 2a0d:1680::/29 | 34.4B × /64 | RIPE NCC | 25th Jun 2019 | |
| 2a0d:16c0::/32 | 4.3B × /64 | RIPE NCC | 8th Aug 2018 | |
| 2a0d:17c0::/29 | 34.4B × /64 | RIPE NCC | 9th Aug 2018 | |
| 2a0d:1840::/29 | 34.4B × /64 | RIPE NCC | 9th Aug 2018 | |
| 2a0d:18c0::/29 | 34.4B × /64 | RIPE NCC | 10th Aug 2018 | |
| 2a0d:1900::/29 | 34.4B × /64 | RIPE NCC | 29th Nov 2017 | |
| 2a0d:1940::/29 | 34.4B × /64 | RIPE NCC | 13th Sept 2021 | |
| 2a0d:1980::/29 | 34.4B × /64 | RIPE NCC | 29th Jan 2018 | |
| 2a0d:19c0::/29 | 34.4B × /64 | RIPE NCC | 10th Aug 2018 | |
| 2a0d:1b00::/29 | 34.4B × /64 | RIPE NCC | 29th Nov 2017 | |
| 2a0d:1b40::/32 | 4.3B × /64 | RIPE NCC | 10th Aug 2018 | |
| 2a0d:1bc0::/29 | 34.4B × /64 | RIPE NCC | 13th Aug 2018 | |
| 2a0d:1c40::/29 | 34.4B × /64 | RIPE NCC | 13th Aug 2018 | |
| 2a0d:1c80::/29 | 34.4B × /64 | RIPE NCC | 30th Jan 2018 | |
| 2a0d:1d00::/29 | 34.4B × /64 | RIPE NCC | 28th Jul 2020 | |
| 2a0d:1d80::/29 | 34.4B × /64 | RIPE NCC | 28th Jan 2021 | |
| 2a0d:1e00::/29 | 34.4B × /64 | RIPE NCC | 27th Oct 2017 | |
| 2a0d:1ec0::/29 | 34.4B × /64 | RIPE NCC | 13th Aug 2018 | |
| 2a0d:1f40::/29 | 34.4B × /64 | RIPE NCC | 13th Aug 2018 | |
| 2a0d:2000::/29 | 34.4B × /64 | RIPE NCC | 19th Sept 2017 | |
| 2a0d:2040::/29 | 34.4B × /64 | RIPE NCC | 14th Aug 2018 | |
| 2a0d:20c0::/29 | 34.4B × /64 | RIPE NCC | 14th Aug 2018 | |
| 2a0d:2180::/32 | 4.3B × /64 | RIPE NCC | 22nd Oct 2019 | |
| 2a0d:21c0::/29 | 34.4B × /64 | RIPE NCC | 14th Aug 2018 | |
| 2a0d:2200::/29 | 34.4B × /64 | RIPE NCC | 28th Jul 2020 | |
| 2a0d:2240::/29 | 34.4B × /64 | RIPE NCC | 14th Aug 2018 | |
| 2a0d:2280::/29 | 34.4B × /64 | RIPE NCC | 22nd Jul 2025 | |
| 2a0d:2300::/29 | 34.4B × /64 | RIPE NCC | 30th Nov 2017 | |
| 2a0d:2340::/29 | 34.4B × /64 | RIPE NCC | 15th Aug 2018 | |
| 2a0d:2380::/29 | 34.4B × /64 | RIPE NCC | 21st Sept 2020 | |
| 2a0d:23c0::/29 | 34.4B × /64 | RIPE NCC | 16th Aug 2018 | |
| 2a0d:2440::/30 | 17.2B × /64 | RIPE NCC | 3rd Sept 2025 | |
| 2a0d:2480::/29 | 34.4B × /64 | RIPE NCC | 31st Jan 2018 | |
| 2a0d:2740::/29 | 34.4B × /64 | RIPE NCC | 17th Aug 2018 | |
| 2a0d:2840::/29 | 34.4B × /64 | RIPE NCC | 1st May 2026 | |
| 2a0d:2880::/29 | 34.4B × /64 | RIPE NCC | 31st Jan 2018 | |
| 2a0d:2980::/29 | 34.4B × /64 | RIPE NCC | 1st Feb 2018 | |
| 2a0d:2b80::/29 | 34.4B × /64 | RIPE NCC | 1st Feb 2018 | |
| 2a0d:2c00::/29 | 34.4B × /64 | RIPE NCC | 9th Oct 2017 | |
| 2a0d:2c0::/29 | 34.4B × /64 | RIPE NCC | 29th Aug 2025 | |
| 2a0d:2cc0::/29 | 34.4B × /64 | RIPE NCC | 21st Aug 2018 | |
| 2a0d:2d00::/32 | 4.3B × /64 | RIPE NCC | 30th Nov 2017 |