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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:d30::/32 | 4.3B × /64 | LACNIC |  AR | 2nd Jul 2026 |
| 2803:d310::/32 | 4.3B × /64 | LACNIC | AR | 7th Feb 2022 |
| 2803:d330::/32 | 4.3B × /64 | LACNIC |  CO | 7th Aug 2026 |
| 2803:d340::/32 | 4.3B × /64 | LACNIC | AR | 4th May 2016 |
| 2803:d360::/32 | 4.3B × /64 | LACNIC | AR | 30th Sept 2019 |
| 2803:d3a0::/32 | 4.3B × /64 | LACNIC |  SV | 18th Jan 2019 |
| 2803:d3c0::/32 | 4.3B × /64 | LACNIC |  CL | 7th Jun 2017 |
| 2803:d3e0::/32 | 4.3B × /64 | LACNIC | CL | 30th Jul 2020 |
| 2803:d400::/32 | 4.3B × /64 | LACNIC | AR | 10th Apr 2012 |
| 2803:d410::/32 | 4.3B × /64 | LACNIC | AR | 2nd Feb 2021 |
| 2803:d420::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2017 |
| 2803:d440::/32 | 4.3B × /64 | LACNIC |  VE | 16th Jun 2015 |
| 2803:d450::/32 | 4.3B × /64 | LACNIC | CO | 28th Nov 2023 |
| 2803:d460::/32 | 4.3B × /64 | LACNIC | VE | 26th Apr 2019 |
| 2803:d490::/32 | 4.3B × /64 | LACNIC |  HN | 20th Jul 2022 |
| 2803:d4c0::/32 | 4.3B × /64 | LACNIC | CO | 1st Nov 2016 |
| 2803:d50::/32 | 4.3B × /64 | LACNIC |  PE | 21st Jun 2024 |
| 2803:d510::/32 | 4.3B × /64 | LACNIC | AR | 29th Dec 2021 |
| 2803:d520::/32 | 4.3B × /64 | LACNIC |  BZ | 28th Dec 2017 |
| 2803:d530::/32 | 4.3B × /64 | LACNIC | AR | 26th Jun 2026 |
| 2803:d540::/32 | 4.3B × /64 | LACNIC | VE | 28th Jan 2016 |
| 2803:d550::/32 | 4.3B × /64 | LACNIC | VE | 20th Jun 2024 |
| 2803:d580::/32 | 4.3B × /64 | LACNIC | CL | 23rd Jul 2014 |
| 2803:d5a0::/32 | 4.3B × /64 | LACNIC | CL | 28th Nov 2018 |
| 2803:d5d0::/32 | 4.3B × /64 | LACNIC | PE | 5th Aug 2025 |
| 2803:d5e0::/32 | 4.3B × /64 | LACNIC | CO | 24th Jun 2020 |
| 2803:d600::/32 | 4.3B × /64 | LACNIC |  UY | 29th Aug 2012 |
| 2803:d620::/32 | 4.3B × /64 | LACNIC | AR | 6th Nov 2017 |
| 2803:d630::/32 | 4.3B × /64 | LACNIC | PE | 17th Apr 2026 |
| 2803:d660::/32 | 4.3B × /64 | LACNIC | AR | 13th Jun 2019 |
| 2803:d690::/32 | 4.3B × /64 | LACNIC | AR | 1st Nov 2022 |
| 2803:d6a0::/32 | 4.3B × /64 | LACNIC | AR | 31st Aug 2018 |
| 2803:d6e0::/32 | 4.3B × /64 | LACNIC | AR | 11th Mar 2020 |
| 2803:d720::/32 | 4.3B × /64 | LACNIC | AR | 28th Mar 2018 |
| 2803:d750::/32 | 4.3B × /64 | LACNIC | PE | 17th Sept 2024 |
| 2803:d780::/32 | 4.3B × /64 | LACNIC | CL | 9th Jan 2015 |
| 2803:d7a0::/32 | 4.3B × /64 | LACNIC | AR | 25th Feb 2019 |
| 2803:d7c0::/32 | 4.3B × /64 | LACNIC | AR | 13th Jul 2017 |
| 2803:d7e0::/32 | 4.3B × /64 | LACNIC | CL | 28th Aug 2020 |
| 2803:d800::/32 | 4.3B × /64 | LACNIC | AR | 16th Mar 2012 |
| 2803:d820::/32 | 4.3B × /64 | LACNIC | AR | 4th Sept 2017 |
| 2803:d840::/32 | 4.3B × /64 | LACNIC |  PA | 18th May 2015 |
| 2803:d860::/32 | 4.3B × /64 | LACNIC | CL | 9th Apr 2019 |
| 2803:d880::/32 | 4.3B × /64 | LACNIC |  CR | 16th Oct 2013 |
| 2803:d8c0::/32 | 4.3B × /64 | LACNIC | AR | 28th Sept 2016 |
| 2803:d8d0::/32 | 4.3B × /64 | LACNIC | VE | 2nd Dec 2024 |
| 2803:d8e0::/32 | 4.3B × /64 | LACNIC | VE | 17th Dec 2019 |
| 2803:d920::/32 | 4.3B × /64 | LACNIC | AR | 18th Dec 2017 |
| 2803:d930::/32 | 4.3B × /64 | LACNIC | PE | 11th Jun 2026 |
| 2803:d950::/32 | 4.3B × /64 | LACNIC |  GT | 24th May 2024 |