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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:d960::/32 | 4.3B × /64 | LACNIC |  AR | 6th Aug 2019 |
| 2803:d9d0::/32 | 4.3B × /64 | LACNIC |  CR | 2nd Jul 2025 |
| 2803:da0::/32 | 4.3B × /64 | LACNIC | AR | 30th Nov 2018 |
| 2803:da40::/32 | 4.3B × /64 | LACNIC | AR | 18th Aug 2015 |
| 2803:da80::/32 | 4.3B × /64 | LACNIC | AR | 21st Mar 2014 |
| 2803:daa0::/32 | 4.3B × /64 | LACNIC | CR | 2nd Aug 2018 |
| 2803:dad0::/32 | 4.3B × /64 | LACNIC | AR | 31st Mar 2025 |
| 2803:dae0::/32 | 4.3B × /64 | LACNIC | AR | 17th Feb 2020 |
| 2803:db10::/32 | 4.3B × /64 | LACNIC |  PE | 8th Mar 2022 |
| 2803:db20::/32 | 4.3B × /64 | LACNIC | AR | 8th Mar 2018 |
| 2803:db30::/32 | 4.3B × /64 | LACNIC |  CO | 20th Aug 2026 |
| 2803:db60::/32 | 4.3B × /64 | LACNIC |  PA | 14th Oct 2019 |
| 2803:db80::/32 | 4.3B × /64 | LACNIC |  CL | 4th Nov 2014 |
| 2803:dba0::/32 | 4.3B × /64 | LACNIC |  PY | 4th Feb 2019 |
| 2803:dc0::/32 | 4.3B × /64 | LACNIC | AR | 15th May 2017 |
| 2803:dc10::/32 | 4.3B × /64 | LACNIC | AR | 15th Mar 2021 |
| 2803:dc30::/32 | 4.3B × /64 | LACNIC |  VE | 25th Feb 2026 |
| 2803:dc80::/32 | 4.3B × /64 | LACNIC | AR | 27th Dec 2013 |
| 2803:dca0::/32 | 4.3B × /64 | LACNIC | CL | 9th Jul 2018 |
| 2803:dcc0::/32 | 4.3B × /64 | LACNIC | CR | 28th Nov 2016 |
| 2803:dd20::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jan 2018 |
| 2803:dd30::/32 | 4.3B × /64 | LACNIC | AR | 16th Jul 2026 |
| 2803:dd40::/32 | 4.3B × /64 | LACNIC | AR | 3rd Mar 2016 |
| 2803:dd50::/32 | 4.3B × /64 | LACNIC | PA | 9th Jul 2024 |
| 2803:dd60::/32 | 4.3B × /64 | LACNIC | PE | 9th Sept 2019 |
| 2803:ddc0::/32 | 4.3B × /64 | LACNIC | PE | 19th May 2017 |
| 2803:dde0::/32 | 4.3B × /64 | LACNIC |  SV | 13th Jul 2020 |
| 2803:de00::/32 | 4.3B × /64 | LACNIC | AR | 17th Sept 2012 |
| 2803:de0::/32 | 4.3B × /64 | LACNIC | AR | 30th Jun 2020 |
| 2803:dec0::/32 | 4.3B × /64 | LACNIC | AR | 10th Mar 2017 |
| 2803:dee0::/32 | 4.3B × /64 | LACNIC | CO | 30th Apr 2020 |
| 2803:df60::/32 | 4.3B × /64 | LACNIC | AR | 14th Nov 2019 |
| 2803:df80::/32 | 4.3B × /64 | LACNIC | AR | 13th Mar 2015 |
| 2803:dfd0::/32 | 4.3B × /64 | LACNIC | CL | 27th Nov 2025 |
| 2803:dfe0::/32 | 4.3B × /64 | LACNIC | CL | 7th Sept 2020 |
| 2803:e00::/32 | 4.3B × /64 | LACNIC | CL | 3rd Sept 2012 |
| 2803:e010::/32 | 4.3B × /64 | LACNIC | AR | 17th Sept 2020 |
| 2803:e020::/32 | 4.3B × /64 | LACNIC | PE | 17th Aug 2017 |
| 2803:e040::/32 | 4.3B × /64 | LACNIC | AR | 6th Apr 2015 |
| 2803:e050::/32 | 4.3B × /64 | LACNIC | AR | 3rd Oct 2023 |
| 2803:e0a0::/32 | 4.3B × /64 | LACNIC | AR | 29th Apr 2018 |
| 2803:e100::/32 | 4.3B × /64 | LACNIC | AR | 10th Oct 2012 |
| 2803:e10::/32 | 4.3B × /64 | LACNIC |  EC | 13th Aug 2021 |
| 2803:e160::/32 | 4.3B × /64 | LACNIC | PY | 23rd Jul 2019 |
| 2803:e180::/32 | 4.3B × /64 | LACNIC | CL | 30th May 2014 |
| 2803:e1a0::/32 | 4.3B × /64 | LACNIC | AR | 3rd Oct 2018 |
| 2803:e1d0::/32 | 4.3B × /64 | LACNIC | VE | 4th Jun 2025 |
| 2803:e1e0::/32 | 4.3B × /64 | LACNIC | AR | 18th May 2020 |
| 2803:e200::/32 | 4.3B × /64 | LACNIC | AR | 6th Jun 2012 |
| 2803:e20::/32 | 4.3B × /64 | LACNIC | AR | 9th Nov 2017 |