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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:6400::/32 | 4.3B × /64 | LACNIC |  DO | 26th Mar 2012 |
| 2803:640::/32 | 4.3B × /64 | LACNIC |  AR | 28th Aug 2015 |
| 2803:6420::/32 | 4.3B × /64 | LACNIC |  EC | 13th Sept 2017 |
| 2803:6430::/32 | 4.3B × /64 | LACNIC |  VE | 29th Jan 2026 |
| 2803:6480::/32 | 4.3B × /64 | LACNIC |  BZ | 7th Nov 2013 |
| 2803:64a0::/32 | 4.3B × /64 | LACNIC |  CL | 8th Jun 2018 |
| 2803:64c0::/32 | 4.3B × /64 | LACNIC | AR | 25th Oct 2016 |
| 2803:64e0::/32 | 4.3B × /64 | LACNIC |  PE | 2nd Jan 2020 |
| 2803:6500::/32 | 4.3B × /64 | LACNIC | PE | 12th Dec 2012 |
| 2803:6520::/32 | 4.3B × /64 | LACNIC | EC | 27th Dec 2017 |
| 2803:6530::/32 | 4.3B × /64 | LACNIC | CL | 25th Jun 2026 |
| 2803:6580::/32 | 4.3B × /64 | LACNIC | CL | 10th Jul 2014 |
| 2803:65a0::/32 | 4.3B × /64 | LACNIC | AR | 21st Nov 2018 |
| 2803:65c0::/32 | 4.3B × /64 | LACNIC | CL | 8th May 2017 |
| 2803:660::/32 | 4.3B × /64 | LACNIC | AR | 7th Jun 2019 |
| 2803:6650::/32 | 4.3B × /64 | LACNIC | DO | 15th Mar 2024 |
| 2803:6690::/32 | 4.3B × /64 | LACNIC | CL | 26th Oct 2022 |
| 2803:66a0::/32 | 4.3B × /64 | LACNIC | CL | 24th Aug 2018 |
| 2803:66c0::/32 | 4.3B × /64 | LACNIC | AR | 8th Feb 2017 |
| 2803:66d0::/32 | 4.3B × /64 | LACNIC | DO | 16th Apr 2025 |
| 2803:66e0::/32 | 4.3B × /64 | LACNIC | AR | 3rd Mar 2020 |
| 2803:6730::/32 | 4.3B × /64 | LACNIC | DO | 3rd Sept 2026 |
| 2803:6740::/32 | 4.3B × /64 | LACNIC | AR | 24th Jun 2016 |
| 2803:6750::/32 | 4.3B × /64 | LACNIC | AR | 12th Sept 2024 |
| 2803:67a0::/32 | 4.3B × /64 | LACNIC | CL | 18th Feb 2019 |
| 2803:67c0::/32 | 4.3B × /64 | LACNIC | EC | 11th Jul 2017 |
| 2803:67e0::/32 | 4.3B × /64 | LACNIC | AR | 24th Aug 2020 |
| 2803:680::/32 | 4.3B × /64 | LACNIC | AR | 31st Mar 2014 |
| 2803:6860::/32 | 4.3B × /64 | LACNIC | AR | 4th Apr 2019 |
| 2803:6880::/32 | 4.3B × /64 | LACNIC | AR | 11th Oct 2013 |
| 2803:68c0::/32 | 4.3B × /64 | LACNIC | AR | 21st Sept 2016 |
| 2803:6920::/32 | 4.3B × /64 | LACNIC | AR | 11th Dec 2017 |
| 2803:69e0::/32 | 4.3B × /64 | LACNIC | AR | 1st Jun 2020 |
| 2803:6a00::/32 | 4.3B × /64 | LACNIC | EC | 9th Jul 2012 |
| 2803:6a20::/32 | 4.3B × /64 | LACNIC | CL | 23rd Oct 2017 |
| 2803:6a30::/32 | 4.3B × /64 | LACNIC | VE | 30th Mar 2026 |
| 2803:6a40::/32 | 4.3B × /64 | LACNIC | AR | 17th Aug 2015 |
| 2803:6a80::/32 | 4.3B × /64 | LACNIC |  NI | 12th Mar 2014 |
| 2803:6ac0::/32 | 4.3B × /64 | LACNIC | AR | 20th Jan 2017 |
| 2803:6b00::/32 | 4.3B × /64 | LACNIC | AR | 13th May 2013 |
| 2803:6b20::/32 | 4.3B × /64 | LACNIC | AR | 28th Feb 2018 |
| 2803:6b30::/32 | 4.3B × /64 | LACNIC | DO | 18th Aug 2026 |
| 2803:6b50::/32 | 4.3B × /64 | LACNIC | AR | 26th Aug 2024 |
| 2803:6b80::/32 | 4.3B × /64 | LACNIC | AR | 20th Oct 2014 |
| 2803:6ba0::/32 | 4.3B × /64 | LACNIC | AR | 25th Jan 2019 |
| 2803:6c00::/32 | 4.3B × /64 | LACNIC |  HN | 30th Apr 2012 |
| 2803:6c10::/32 | 4.3B × /64 | LACNIC | EC | 8th Mar 2021 |
| 2803:6c20::/32 | 4.3B × /64 | LACNIC | CL | 28th Sept 2017 |
| 2803:6c40::/32 | 4.3B × /64 | LACNIC | AR | 30th Jun 2015 |
| 2803:6c50::/32 | 4.3B × /64 | LACNIC | VE | 11th Dec 2023 |