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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,481 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:a5d0::/32 | 4.3B × /64 | LACNIC |  CO | 17th Jul 2025 |
| 2803:a5e0::/32 | 4.3B × /64 | LACNIC |  AR | 11th Jun 2020 |
| 2803:a60::/32 | 4.3B × /64 | LACNIC | AR | 30th May 2019 |
| 2803:a620::/32 | 4.3B × /64 | LACNIC | AR | 1st Nov 2017 |
| 2803:a660::/32 | 4.3B × /64 | LACNIC |  EC | 12th Jun 2019 |
| 2803:a680::/32 | 4.3B × /64 | LACNIC | AR | 15th Apr 2014 |
| 2803:a690::/32 | 4.3B × /64 | LACNIC |  VE | 25th Oct 2022 |
| 2803:a6e0::/32 | 4.3B × /64 | LACNIC |  HN | 3rd Mar 2020 |
| 2803:a700::/32 | 4.3B × /64 | LACNIC | HN | 6th Jun 2013 |
| 2803:a730::/32 | 4.3B × /64 | LACNIC | CO | 3rd Sept 2026 |
| 2803:a740::/32 | 4.3B × /64 | LACNIC | CO | 21st Jun 2016 |
| 2803:a790::/32 | 4.3B × /64 | LACNIC | AR | 16th Aug 2023 |
| 2803:a7a0::/32 | 4.3B × /64 | LACNIC |  GT | 18th Feb 2019 |
| 2803:a7e0::/32 | 4.3B × /64 | LACNIC | EC | 21st Aug 2020 |
| 2803:a80::/32 | 4.3B × /64 | LACNIC | CO | 19th Feb 2014 |
| 2803:a830::/32 | 4.3B × /64 | LACNIC | VE | 29th Dec 2025 |
| 2803:a860::/32 | 4.3B × /64 | LACNIC | AR | 4th Apr 2019 |
| 2803:a880::/32 | 4.3B × /64 | LACNIC | AR | 30th Sept 2013 |
| 2803:a890::/32 | 4.3B × /64 | LACNIC | AR | 31st May 2022 |
| 2803:a8b0::/32 | 4.3B × /64 | LACNIC | VE | 26th Oct 2026 |
| 2803:a8c0::/32 | 4.3B × /64 | LACNIC |  BZ | 20th Sept 2016 |
| 2803:a8d0::/32 | 4.3B × /64 | LACNIC |  PE | 22nd Nov 2024 |
| 2803:a8e0::/32 | 4.3B × /64 | LACNIC | AR | 11th Dec 2019 |
| 2803:a900::/32 | 4.3B × /64 | LACNIC | AR | 6th Nov 2012 |
| 2803:a90::/32 | 4.3B × /64 | LACNIC | AR | 16th Sept 2022 |
| 2803:a910::/32 | 4.3B × /64 | LACNIC | CO | 22nd Oct 2021 |
| 2803:a960::/32 | 4.3B × /64 | LACNIC |  CL | 1st Aug 2019 |
| 2803:a980::/32 | 4.3B × /64 | LACNIC | CL | 18th Jun 2014 |
| 2803:a9a0::/32 | 4.3B × /64 | LACNIC |  SV | 30th Oct 2018 |
| 2803:a9d0::/32 | 4.3B × /64 | LACNIC | GT | 23rd Jun 2025 |
| 2803:a9e0::/32 | 4.3B × /64 | LACNIC | CL | 29th May 2020 |
| 2803:aa0::/32 | 4.3B × /64 | LACNIC | CL | 25th Jul 2018 |
| 2803:aa10::/32 | 4.3B × /64 | LACNIC | AR | 18th Jun 2021 |
| 2803:aa40::/32 | 4.3B × /64 | LACNIC | AR | 13th Aug 2015 |
| 2803:aa50::/32 | 4.3B × /64 | LACNIC |  UY | 31st Jan 2024 |
| 2803:aa80::/32 | 4.3B × /64 | LACNIC |  CR | 11th Mar 2014 |
| 2803:aa90::/32 | 4.3B × /64 | LACNIC | AR | 22nd Sept 2022 |
| 2803:aaa0::/32 | 4.3B × /64 | LACNIC | AR | 31st Jul 2018 |
| 2803:aac0::/32 | 4.3B × /64 | LACNIC | AR | 20th Jan 2017 |
| 2803:ab20::/32 | 4.3B × /64 | LACNIC | VE | 28th Feb 2018 |
| 2803:ab40::/32 | 4.3B × /64 | LACNIC | CL | 26th May 2016 |
| 2803:aba0::/32 | 4.3B × /64 | LACNIC | CO | 25th Jan 2019 |
| 2803:abd0::/32 | 4.3B × /64 | LACNIC | AR | 7th Oct 2025 |
| 2803:ac0::/32 | 4.3B × /64 | LACNIC | CL | 9th Jan 2017 |
| 2803:ac20::/32 | 4.3B × /64 | LACNIC | AR | 26th Sept 2017 |
| 2803:ac40::/32 | 4.3B × /64 | LACNIC |  PA | 29th Jun 2015 |
| 2803:ac60::/32 | 4.3B × /64 | LACNIC | EC | 9th May 2019 |
| 2803:ac90::/32 | 4.3B × /64 | LACNIC | EC | 3rd Aug 2022 |
| 2803:aca0::/32 | 4.3B × /64 | LACNIC | AR | 27th Jun 2018 |
| 2803:acc0::/32 | 4.3B × /64 | LACNIC | HN | 16th Nov 2016 |