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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2a0c:edc0::/29 | 34.4B × /64 | RIPE NCC | 25th Jul 2018 | |
| 2a0c:ee80::/29 | 34.4B × /64 | RIPE NCC | 24th Jan 2018 | |
| 2a0c:ef40::/29 | 34.4B × /64 | RIPE NCC | 18th Aug 2026 | |
| 2a0c:ef80::/32 | 4.3B × /64 | RIPE NCC | 22nd Jan 2020 | |
| 2a0c:f000::/32 | 4.3B × /64 | RIPE NCC | 21st Sept 2017 | |
| 2a0c:f100::/29 | 34.4B × /64 | RIPE NCC | 23rd Jul 2020 | |
| 2a0c:f140::/29 | 34.4B × /64 | RIPE NCC | 5th Oct 2021 | |
| 2a0c:f180::/29 | 34.4B × /64 | RIPE NCC | 24th Jan 2018 | |
| 2a0c:f200::/29 | 34.4B × /64 | RIPE NCC | 5th May 2023 | |
| 2a0c:f240::/29 | 34.4B × /64 | RIPE NCC | 26th Jul 2018 | |
| 2a0c:f280::/29 | 34.4B × /64 | RIPE NCC | 24th Jan 2018 | |
| 2a0c:f2c0::/29 | 34.4B × /64 | RIPE NCC | 29th Aug 2025 | |
| 2a0c:f300::/29 | 34.4B × /64 | RIPE NCC | 24th Nov 2017 | |
| 2a0c:f340::/32 | 4.3B × /64 | RIPE NCC | 26th Jul 2018 | |
| 2a0c:f3c0::/29 | 34.4B × /64 | RIPE NCC | 28th Jan 2021 | |
| 2a0c:f400::/29 | 34.4B × /64 | RIPE NCC | 6th Oct 2017 | |
| 2a0c:f480::/29 | 34.4B × /64 | RIPE NCC | 24th Jan 2018 | |
| 2a0c:f4c0::/29 | 34.4B × /64 | RIPE NCC | 27th Jul 2018 | |
| 2a0c:f600::/29 | 34.4B × /64 | RIPE NCC | 26th Oct 2017 | |
| 2a0c:f6c0::/29 | 34.4B × /64 | RIPE NCC | 27th Jul 2018 | |
| 2a0c:f700::/29 | 34.4B × /64 | RIPE NCC | 27th Nov 2017 | |
| 2a0c:f740::/29 | 34.4B × /64 | RIPE NCC | 7th Apr 2020 | |
| 2a0c:f800::/29 | 34.4B × /64 | RIPE NCC | 26th Sept 2017 | |
| 2a0c:f900::/29 | 34.4B × /64 | RIPE NCC | 27th Nov 2017 | |
| 2a0c:f940::/29 | 34.4B × /64 | RIPE NCC | 19th Aug 2026 | |
| 2a0c:f980::/29 | 34.4B × /64 | RIPE NCC | 24th Jan 2018 | |
| 2a0c:f9c0::/29 | 34.4B × /64 | RIPE NCC | 30th Jul 2018 | |
| 2a0c:fa00::/32 | 4.3B × /64 | RIPE NCC | 26th Oct 2017 | |
| 2a0c:fb00::/29 | 34.4B × /64 | RIPE NCC | 24th Jul 2020 | |
| 2a0c:fb40::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:fb80::/29 | 34.4B × /64 | RIPE NCC | 24th Jan 2018 | |
| 2a0c:fbc0::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:fc40::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:fc80::/29 | 34.4B × /64 | RIPE NCC | 29th Aug 2025 | |
| 2a0c:fcc0::/32 | 4.3B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:fd40::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:fd80::/29 | 34.4B × /64 | RIPE NCC | 29th Aug 2025 | |
| 2a0c:fe40::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:fec0::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:ff00::/29 | 34.4B × /64 | RIPE NCC | 28th Nov 2017 | |
| 2a0c:ff40::/29 | 34.4B × /64 | RIPE NCC | 31st Jul 2018 | |
| 2a0c:ff80::/29 | 34.4B × /64 | RIPE NCC | 24th Jan 2018 | |
| 2a0d:100::/29 | 34.4B × /64 | RIPE NCC | 23rd Apr 2024 | |
| 2a0d:1040::/29 | 34.4B × /64 | RIPE NCC | 9th Feb 2021 | |
| 2a0d:10c0::/29 | 34.4B × /64 | RIPE NCC | 7th Aug 2018 | |
| 2a0d:11c0::/32 | 4.3B × /64 | RIPE NCC | 7th Aug 2018 | |
| 2a0d:1200::/29 | 34.4B × /64 | RIPE NCC | 27th Oct 2017 | |
| 2a0d:1240::/29 | 34.4B × /64 | RIPE NCC | 7th Aug 2018 | |
| 2a0d:1280::/29 | 34.4B × /64 | RIPE NCC | 29th Jan 2018 | |
| 2a0d:1300::/29 | 34.4B × /64 | RIPE NCC | 28th Nov 2017 |