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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:cd80::/29 | 34.4B × /64 | RIPE NCC | 5th Mar 2018 | |
| 2a0d:ce40::/29 | 34.4B × /64 | RIPE NCC | 16th Oct 2018 | |
| 2a0d:cf40::/29 | 34.4B × /64 | RIPE NCC | 1st Feb 2021 | |
| 2a0d:cf80::/29 | 34.4B × /64 | RIPE NCC | 5th Mar 2018 | |
| 2a0d:d000::/29 | 34.4B × /64 | RIPE NCC | 23rd Apr 2020 | |
| 2a0d:d080::/29 | 34.4B × /64 | RIPE NCC | 5th Mar 2018 | |
| 2a0d:d140::/29 | 34.4B × /64 | RIPE NCC | 17th Oct 2018 | |
| 2a0d:d200::/29 | 34.4B × /64 | RIPE NCC | 7th Nov 2024 | |
| 2a0d:d240::/29 | 34.4B × /64 | RIPE NCC | 17th Oct 2018 | |
| 2a0d:d280::/32 | 4.3B × /64 | RIPE NCC | 5th Mar 2018 | |
| 2a0d:d300::/32 | 4.3B × /64 | RIPE NCC | 13th Dec 2017 | |
| 2a0d:d340::/29 | 34.4B × /64 | RIPE NCC | 17th Oct 2018 | |
| 2a0d:d3c0::/29 | 34.4B × /64 | RIPE NCC | 17th Oct 2018 | |
| 2a0d:d440::/29 | 34.4B × /64 | RIPE NCC | 23rd Jan 2020 | |
| 2a0d:d4c0::/32 | 4.3B × /64 | RIPE NCC | 18th Oct 2018 | |
| 2a0d:d500::/29 | 34.4B × /64 | RIPE NCC | 13th Dec 2017 | |
| 2a0d:d540::/29 | 34.4B × /64 | RIPE NCC | 18th Oct 2018 | |
| 2a0d:d5c0::/29 | 34.4B × /64 | RIPE NCC | 18th Oct 2018 | |
| 2a0d:d640::/29 | 34.4B × /64 | RIPE NCC | 19th Oct 2018 | |
| 2a0d:d680::/29 | 34.4B × /64 | RIPE NCC | 6th Mar 2018 | |
| 2a0d:d700::/29 | 34.4B × /64 | RIPE NCC | 12th Sept 2025 | |
| 2a0d:d800::/29 | 34.4B × /64 | RIPE NCC | 2nd Oct 2017 | |
| 2a0d:d840::/29 | 34.4B × /64 | RIPE NCC | 22nd Oct 2018 | |
| 2a0d:d880::/29 | 34.4B × /64 | RIPE NCC | 6th Mar 2018 | |
| 2a0d:da40::/29 | 34.4B × /64 | RIPE NCC | 22nd Oct 2018 | |
| 2a0d:da80::/32 | 4.3B × /64 | RIPE NCC | 6th Mar 2018 | |
| 2a0d:db00::/29 | 34.4B × /64 | RIPE NCC | 13th Dec 2017 | |
| 2a0d:db80::/29 | 34.4B × /64 | RIPE NCC | 6th Mar 2018 | |
| 2a0d:dbc0::/29 | 34.4B × /64 | RIPE NCC | 22nd Oct 2018 | |
| 2a0d:dc0::/29 | 34.4B × /64 | RIPE NCC | 7th Aug 2018 | |
| 2a0d:dc80::/29 | 34.4B × /64 | RIPE NCC | 6th Mar 2018 | |
| 2a0d:dcc0::/29 | 34.4B × /64 | RIPE NCC | 22nd Oct 2018 | |
| 2a0d:dd00::/29 | 34.4B × /64 | RIPE NCC | 13th Dec 2017 | |
| 2a0d:dd40::/29 | 34.4B × /64 | RIPE NCC | 23rd Jan 2020 | |
| 2a0d:ddc0::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2018 | |
| 2a0d:de00::/29 | 34.4B × /64 | RIPE NCC | 3rd Nov 2017 | |
| 2a0d:df40::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2018 | |
| 2a0d:e000::/29 | 34.4B × /64 | RIPE NCC | 20th Sept 2017 | |
| 2a0d:e0c0::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2018 | |
| 2a0d:e100::/29 | 34.4B × /64 | RIPE NCC | 17th Jun 2021 | |
| 2a0d:e180::/32 | 4.3B × /64 | RIPE NCC | 7th Mar 2018 | |
| 2a0d:e1c0::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2018 | |
| 2a0d:e200::/29 | 34.4B × /64 | RIPE NCC | 3rd Nov 2017 | |
| 2a0d:e2c0::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2018 | |
| 2a0d:e300::/29 | 34.4B × /64 | RIPE NCC | 14th Dec 2017 | |
| 2a0d:e340::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2018 | |
| 2a0d:e380::/29 | 34.4B × /64 | RIPE NCC | 7th Mar 2018 | |
| 2a0d:e3c0::/29 | 34.4B × /64 | RIPE NCC | 23rd Oct 2018 | |
| 2a0d:e400::/32 | 4.3B × /64 | RIPE NCC | 13th Oct 2017 | |
| 2a0d:e40::/29 | 34.4B × /64 | RIPE NCC | 7th Aug 2018 |