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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:aa30::/32 | 4.3B × /64 | LACNIC |  CO | 27th Mar 2026 |
| 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:ab30::/32 | 4.3B × /64 | LACNIC | VE | 13th Aug 2026 |
| 2803:ab40::/32 | 4.3B × /64 | LACNIC |  CL | 26th May 2016 |
| 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 |
| 2803:ad00::/32 | 4.3B × /64 | LACNIC | AR | 15th Feb 2013 |
| 2803:ad30::/32 | 4.3B × /64 | LACNIC | AR | 8th Jul 2026 |
| 2803:ad60::/32 | 4.3B × /64 | LACNIC | VE | 5th Sept 2019 |
| 2803:ad90::/32 | 4.3B × /64 | LACNIC | AR | 2nd May 2023 |
| 2803:add0::/32 | 4.3B × /64 | LACNIC | HN | 13th Aug 2025 |
| 2803:ae00::/32 | 4.3B × /64 | LACNIC | AR | 10th Sept 2012 |
| 2803:ae0::/32 | 4.3B × /64 | LACNIC |  PY | 6th Feb 2020 |
| 2803:ae20::/32 | 4.3B × /64 | LACNIC | CR | 14th Nov 2017 |
| 2803:ae30::/32 | 4.3B × /64 | LACNIC | CO | 23rd Apr 2026 |
| 2803:aec0::/32 | 4.3B × /64 | LACNIC | HN | 7th Mar 2017 |
| 2803:aed0::/32 | 4.3B × /64 | LACNIC | VE | 2nd May 2025 |
| 2803:af20::/32 | 4.3B × /64 | LACNIC | AR | 13th Apr 2018 |
| 2803:af60::/32 | 4.3B × /64 | LACNIC |  SV | 7th Nov 2019 |
| 2803:afa0::/32 | 4.3B × /64 | LACNIC | AR | 8th Mar 2019 |
| 2803:afc0::/32 | 4.3B × /64 | LACNIC | AR | 1st Aug 2017 |
| 2803:afd0::/32 | 4.3B × /64 | LACNIC | CL | 18th Nov 2025 |
| 2803:afe0::/32 | 4.3B × /64 | LACNIC | AR | 1st Sept 2020 |
| 2803:b010::/32 | 4.3B × /64 | LACNIC | AR | 6th Oct 2020 |
| 2803:b020::/32 | 4.3B × /64 | LACNIC | AR | 21st Aug 2017 |
| 2803:b030::/32 | 4.3B × /64 | LACNIC | CL | 19th Dec 2025 |
| 2803:b060::/32 | 4.3B × /64 | LACNIC |  PE | 28th Mar 2019 |
| 2803:b080::/32 | 4.3B × /64 | LACNIC |  BZ | 27th Aug 2013 |
| 2803:b110::/32 | 4.3B × /64 | LACNIC | CL | 15th Oct 2021 |
| 2803:b160::/32 | 4.3B × /64 | LACNIC | VE | 26th Jul 2019 |
| 2803:b180::/32 | 4.3B × /64 | LACNIC | CL | 4th Jun 2014 |
| 2803:b1c0::/32 | 4.3B × /64 | LACNIC | CL | 24th Mar 2017 |
| 2803:b1d0::/32 | 4.3B × /64 | LACNIC | AR | 16th Jun 2025 |
| 2803:b200::/32 | 4.3B × /64 | LACNIC | UY | 25th Jun 2012 |
| 2803:b20::/32 | 4.3B × /64 | LACNIC | AR | 20th Feb 2018 |
| 2803:b230::/32 | 4.3B × /64 | LACNIC |  DO | 12th Mar 2026 |
| 2803:b250::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jan 2024 |
| 2803:b260::/32 | 4.3B × /64 | LACNIC | AR | 29th May 2019 |