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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
84,481 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:66c0::/32 | 4.3B × /64 | LACNIC |  AR | 8th Feb 2017 |
| 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 |
| 2803:68b0::/32 | 4.3B × /64 | LACNIC | AR | 26th Oct 2026 |
| 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 |
| 2803:6b50::/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 |
| 2803:6c60::/32 | 4.3B × /64 | LACNIC | AR | 10th May 2019 |
| 2803:6c80::/32 | 4.3B × /64 | LACNIC | AR | 6th Dec 2013 |
| 2803:6ca0::/32 | 4.3B × /64 | LACNIC | AR | 28th Jun 2018 |
| 2803:6cc0::/32 | 4.3B × /64 | LACNIC |  SV | 17th Nov 2016 |
| 2803:6d30::/32 | 4.3B × /64 | LACNIC |  CO | 9th Jul 2026 |
| 2803:6d40::/32 | 4.3B × /64 | LACNIC | AR | 25th Feb 2016 |
| 2803:6d50::/32 | 4.3B × /64 | LACNIC |  PE | 4th Jul 2024 |
| 2803:6d60::/32 | 4.3B × /64 | LACNIC | SV | 10th Sept 2019 |
| 2803:6da0::/32 | 4.3B × /64 | LACNIC | AR | 10th Dec 2018 |
| 2803:6dc0::/32 | 4.3B × /64 | LACNIC | AR | 18th May 2017 |
| 2803:6e10::/32 | 4.3B × /64 | LACNIC |  CR | 31st Aug 2021 |
| 2803:6e30::/32 | 4.3B × /64 | LACNIC | AR | 23rd Apr 2026 |
| 2803:6e40::/32 | 4.3B × /64 | LACNIC | AR | 8th Oct 2015 |
| 2803:6e50::/32 | 4.3B × /64 | LACNIC | VE | 15th Apr 2024 |
| 2803:6e60::/32 | 4.3B × /64 | LACNIC | AR | 26th Jun 2019 |
| 2803:6ea0::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2018 |
| 2803:6ec0::/32 | 4.3B × /64 | LACNIC | EC | 7th Mar 2017 |
| 2803:6ed0::/32 | 4.3B × /64 | LACNIC | CO | 7th May 2025 |
| 2803:6ee0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Apr 2020 |