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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:8a40::/32 | 4.3B × /64 | LACNIC |  AR | 10th Aug 2015 |
| 2803:8a60::/32 | 4.3B × /64 | LACNIC | AR | 30th May 2019 |
| 2803:8ad0::/32 | 4.3B × /64 | LACNIC |  PE | 10th Mar 2025 |
| 2803:8ae0::/32 | 4.3B × /64 | LACNIC | AR | 7th Feb 2020 |
| 2803:8b10::/32 | 4.3B × /64 | LACNIC |  DO | 16th Feb 2022 |
| 2803:8b60::/32 | 4.3B × /64 | LACNIC | AR | 3rd Oct 2019 |
| 2803:8b90::/32 | 4.3B × /64 | LACNIC |  VE | 27th Jun 2023 |
| 2803:8ba0::/32 | 4.3B × /64 | LACNIC |  PY | 22nd Jan 2019 |
| 2803:8bc0::/32 | 4.3B × /64 | LACNIC | AR | 13th Jun 2017 |
| 2803:8c20::/32 | 4.3B × /64 | LACNIC |  EC | 26th Sept 2017 |
| 2803:8c60::/32 | 4.3B × /64 | LACNIC | AR | 7th May 2019 |
| 2803:8c80::/32 | 4.3B × /64 | LACNIC |  PA | 21st Nov 2013 |
| 2803:8cc0::/32 | 4.3B × /64 | LACNIC | AR | 10th Nov 2016 |
| 2803:8d10::/32 | 4.3B × /64 | LACNIC | AR | 5th Jan 2022 |
| 2803:8d50::/32 | 4.3B × /64 | LACNIC | VE | 25th Jun 2024 |
| 2803:8dd0::/32 | 4.3B × /64 | LACNIC | PE | 12th Aug 2025 |
| 2803:8e00::/32 | 4.3B × /64 | LACNIC |  CL | 4th Sept 2012 |
| 2803:8e0::/32 | 4.3B × /64 | LACNIC | AR | 5th Dec 2019 |
| 2803:8e10::/32 | 4.3B × /64 | LACNIC |  CR | 17th Aug 2021 |
| 2803:8e40::/32 | 4.3B × /64 | LACNIC | CL | 25th Sept 2015 |
| 2803:8e80::/32 | 4.3B × /64 | LACNIC | PY | 7th May 2014 |
| 2803:8ec0::/32 | 4.3B × /64 | LACNIC |  BO | 3rd Mar 2017 |
| 2803:8ee0::/32 | 4.3B × /64 | LACNIC | AR | 3rd Apr 2020 |
| 2803:8f10::/32 | 4.3B × /64 | LACNIC | AR | 7th Apr 2022 |
| 2803:8f20::/32 | 4.3B × /64 | LACNIC |  HN | 6th Apr 2018 |
| 2803:8f40::/32 | 4.3B × /64 | LACNIC | AR | 26th Jul 2016 |
| 2803:8f50::/32 | 4.3B × /64 | LACNIC | AR | 24th Sept 2024 |
| 2803:8f60::/32 | 4.3B × /64 | LACNIC | AR | 5th Nov 2019 |
| 2803:8fa0::/32 | 4.3B × /64 | LACNIC | AR | 1st Mar 2019 |
| 2803:8fc0::/32 | 4.3B × /64 | LACNIC | AR | 25th Jul 2017 |
| 2803:9000::/32 | 4.3B × /64 | LACNIC | AR | 7th Feb 2012 |
| 2803:9010::/32 | 4.3B × /64 | LACNIC | AR | 21st Sept 2020 |
| 2803:9020::/32 | 4.3B × /64 | LACNIC | AR | 17th Aug 2017 |
| 2803:90a0::/32 | 4.3B × /64 | LACNIC |  TT | 29th Apr 2018 |
| 2803:90b0::/32 | 4.3B × /64 | LACNIC | PA | 14th Oct 2026 |
| 2803:90c0::/32 | 4.3B × /64 | LACNIC | AR | 7th Sept 2016 |
| 2803:90d0::/32 | 4.3B × /64 | LACNIC | AR | 1st Nov 2024 |
| 2803:90e0::/32 | 4.3B × /64 | LACNIC | AR | 27th Nov 2019 |
| 2803:9120::/32 | 4.3B × /64 | LACNIC | AR | 28th Nov 2017 |
| 2803:9190::/32 | 4.3B × /64 | LACNIC |  CO | 12th Jan 2023 |
| 2803:91a0::/32 | 4.3B × /64 | LACNIC | CL | 5th Oct 2018 |
| 2803:91c0::/32 | 4.3B × /64 | LACNIC | AR | 23rd Mar 2017 |
| 2803:91d0::/32 | 4.3B × /64 | LACNIC | CL | 11th Jun 2025 |
| 2803:91e0::/32 | 4.3B × /64 | LACNIC | CL | 18th May 2020 |
| 2803:920::/32 | 4.3B × /64 | LACNIC | AR | 6th Dec 2017 |
| 2803:9210::/32 | 4.3B × /64 | LACNIC | VE | 29th Apr 2021 |
| 2803:9220::/32 | 4.3B × /64 | LACNIC | AR | 11th Oct 2017 |
| 2803:9250::/32 | 4.3B × /64 | LACNIC | CO | 19th Jan 2024 |
| 2803:9280::/32 | 4.3B × /64 | LACNIC | AR | 6th Feb 2014 |
| 2803:92a0::/32 | 4.3B × /64 | LACNIC | EC | 17th Jul 2018 |