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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:eb00::/32 | 4.3B × /64 | LACNIC |  AR | 14th May 2013 |
| 2803:eb20::/32 | 4.3B × /64 | LACNIC | AR | 28th Feb 2018 |
| 2803:eb30::/32 | 4.3B × /64 | LACNIC |  VE | 18th Aug 2026 |
| 2803:eba0::/32 | 4.3B × /64 | LACNIC | AR | 28th Jan 2019 |
| 2803:ebd0::/32 | 4.3B × /64 | LACNIC |  DO | 14th Oct 2025 |
| 2803:ec00::/32 | 4.3B × /64 | LACNIC | AR | 2nd May 2012 |
| 2803:ec10::/32 | 4.3B × /64 | LACNIC | VE | 8th Mar 2021 |
| 2803:ec20::/32 | 4.3B × /64 | LACNIC |  EC | 28th Sept 2017 |
| 2803:ec60::/32 | 4.3B × /64 | LACNIC | AR | 10th May 2019 |
| 2803:eca0::/32 | 4.3B × /64 | LACNIC | AR | 29th Jun 2018 |
| 2803:ece0::/32 | 4.3B × /64 | LACNIC | AR | 17th Jan 2020 |
| 2803:ed10::/32 | 4.3B × /64 | LACNIC | VE | 14th Jan 2022 |
| 2803:ed20::/32 | 4.3B × /64 | LACNIC | AR | 19th Jan 2018 |
| 2803:ed40::/32 | 4.3B × /64 | LACNIC |  PA | 25th Feb 2016 |
| 2803:ed80::/32 | 4.3B × /64 | LACNIC |  CL | 12th Aug 2014 |
| 2803:eda0::/32 | 4.3B × /64 | LACNIC | AR | 10th Dec 2018 |
| 2803:ee00::/32 | 4.3B × /64 | LACNIC | AR | 10th Sept 2012 |
| 2803:ee0::/32 | 4.3B × /64 | LACNIC | AR | 31st Mar 2020 |
| 2803:ee10::/32 | 4.3B × /64 | LACNIC | AR | 6th Sept 2021 |
| 2803:ee30::/32 | 4.3B × /64 | LACNIC |  GT | 24th Apr 2026 |
| 2803:ee40::/32 | 4.3B × /64 | LACNIC |  CR | 9th Oct 2015 |
| 2803:ee80::/32 | 4.3B × /64 | LACNIC | AR | 13th May 2014 |
| 2803:eea0::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2018 |
| 2803:eed0::/32 | 4.3B × /64 | LACNIC |  HN | 8th May 2025 |
| 2803:ef40::/32 | 4.3B × /64 | LACNIC | AR | 4th Aug 2016 |
| 2803:ef50::/32 | 4.3B × /64 | LACNIC | VE | 3rd Oct 2024 |
| 2803:ef60::/32 | 4.3B × /64 | LACNIC | AR | 11th Nov 2019 |
| 2803:ef80::/32 | 4.3B × /64 | LACNIC | CL | 25th Feb 2015 |
| 2803:efc0::/32 | 4.3B × /64 | LACNIC | EC | 1st Aug 2017 |
| 2803:f000::/32 | 4.3B × /64 | LACNIC | AR | 23rd Feb 2012 |
| 2803:f030::/32 | 4.3B × /64 | LACNIC |  SV | 23rd Dec 2025 |
| 2803:f040::/32 | 4.3B × /64 | LACNIC | AR | 17th Apr 2015 |
| 2803:f050::/32 | 4.3B × /64 | LACNIC | AR | 6th Oct 2023 |
| 2803:f0a0::/32 | 4.3B × /64 | LACNIC | EC | 9th May 2018 |
| 2803:f0d0::/32 | 4.3B × /64 | LACNIC | AR | 11th Nov 2024 |
| 2803:f110::/32 | 4.3B × /64 | LACNIC |  GY | 19th Oct 2021 |
| 2803:f140::/32 | 4.3B × /64 | LACNIC | AR | 17th Nov 2015 |
| 2803:f150::/32 | 4.3B × /64 | LACNIC | CR | 17th May 2024 |
| 2803:f180::/32 | 4.3B × /64 | LACNIC | HN | 11th Jun 2014 |
| 2803:f190::/32 | 4.3B × /64 | LACNIC | AR | 24th Jan 2023 |
| 2803:f1e0::/32 | 4.3B × /64 | LACNIC |  PE | 21st May 2020 |
| 2803:f210::/32 | 4.3B × /64 | LACNIC | PE | 21st May 2021 |
| 2803:f220::/32 | 4.3B × /64 | LACNIC | AR | 17th Oct 2017 |
| 2803:f280::/32 | 4.3B × /64 | LACNIC | DO | 12th Feb 2014 |
| 2803:f330::/32 | 4.3B × /64 | LACNIC |  CO | 11th Aug 2026 |
| 2803:f360::/32 | 4.3B × /64 | LACNIC | CO | 30th Sept 2019 |
| 2803:f380::/32 | 4.3B × /64 | LACNIC | AR | 30th Sept 2014 |
| 2803:f390::/32 | 4.3B × /64 | LACNIC | CL | 22nd Jun 2023 |
| 2803:f3a0::/32 | 4.3B × /64 | LACNIC | CL | 22nd Jan 2019 |
| 2803:f3d0::/32 | 4.3B × /64 | LACNIC | CL | 29th Sept 2025 |