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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:b5e0::/32 | 4.3B × /64 | LACNIC |  AR | 24th Jun 2020 |
| 2803:b620::/32 | 4.3B × /64 | LACNIC | AR | 9th Nov 2017 |
| 2803:b680::/32 | 4.3B × /64 | LACNIC | AR | 30th Apr 2014 |
| 2803:b690::/32 | 4.3B × /64 | LACNIC | AR | 7th Nov 2022 |
| 2803:b6c0::/32 | 4.3B × /64 | LACNIC | AR | 20th Feb 2017 |
| 2803:b720::/32 | 4.3B × /64 | LACNIC |  BZ | 2nd Apr 2018 |
| 2803:b730::/32 | 4.3B × /64 | LACNIC |  CL | 11th Sept 2026 |
| 2803:b740::/32 | 4.3B × /64 | LACNIC | AR | 21st Jul 2016 |
| 2803:b750::/32 | 4.3B × /64 | LACNIC |  PE | 17th Sept 2024 |
| 2803:b760::/32 | 4.3B × /64 | LACNIC |  GT | 31st Oct 2019 |
| 2803:b790::/32 | 4.3B × /64 | LACNIC |  EC | 31st Aug 2023 |
| 2803:b7c0::/32 | 4.3B × /64 | LACNIC | AR | 13th Jul 2017 |
| 2803:b830::/32 | 4.3B × /64 | LACNIC |  SV | 9th Jan 2026 |
| 2803:b880::/32 | 4.3B × /64 | LACNIC | AR | 23rd Oct 2013 |
| 2803:b890::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jun 2022 |
| 2803:b8b0::/32 | 4.3B × /64 | LACNIC |  DO | 10th Nov 2026 |
| 2803:b8d0::/32 | 4.3B × /64 | LACNIC |  VE | 2nd Dec 2024 |
| 2803:b8e0::/32 | 4.3B × /64 | LACNIC | AR | 20th Dec 2019 |
| 2803:b90::/32 | 4.3B × /64 | LACNIC | CL | 23rd Jun 2023 |
| 2803:b930::/32 | 4.3B × /64 | LACNIC | PE | 16th Jun 2026 |
| 2803:b940::/32 | 4.3B × /64 | LACNIC | PE | 18th Dec 2015 |
| 2803:b9a0::/32 | 4.3B × /64 | LACNIC | CL | 14th Nov 2018 |
| 2803:b9e0::/32 | 4.3B × /64 | LACNIC | CL | 4th Jun 2020 |
| 2803:ba20::/32 | 4.3B × /64 | LACNIC | AR | 27th Oct 2017 |
| 2803:ba30::/32 | 4.3B × /64 | LACNIC | PE | 6th Apr 2026 |
| 2803:baa0::/32 | 4.3B × /64 | LACNIC | CL | 7th Aug 2018 |
| 2803:bac0::/32 | 4.3B × /64 | LACNIC | AR | 27th Jan 2017 |
| 2803:bad0::/32 | 4.3B × /64 | LACNIC | AR | 31st Mar 2025 |
| 2803:bb00::/32 | 4.3B × /64 | LACNIC | AR | 24th May 2013 |
| 2803:bb10::/32 | 4.3B × /64 | LACNIC | AR | 10th Mar 2022 |
| 2803:bb20::/32 | 4.3B × /64 | LACNIC | AR | 12th Mar 2018 |
| 2803:bb50::/32 | 4.3B × /64 | LACNIC |  HN | 4th Sept 2024 |
| 2803:bb90::/32 | 4.3B × /64 | LACNIC | AR | 7th Aug 2023 |
| 2803:bba0::/32 | 4.3B × /64 | LACNIC | SV | 6th Feb 2019 |
| 2803:bbc0::/32 | 4.3B × /64 | LACNIC | EC | 5th Jul 2017 |
| 2803:bc10::/32 | 4.3B × /64 | LACNIC | AR | 16th Mar 2021 |
| 2803:bc20::/32 | 4.3B × /64 | LACNIC | EC | 5th Oct 2017 |
| 2803:bc30::/32 | 4.3B × /64 | LACNIC | GT | 26th Feb 2026 |
| 2803:bc50::/32 | 4.3B × /64 | LACNIC |  CO | 28th Dec 2023 |
| 2803:bc80::/32 | 4.3B × /64 | LACNIC | CO | 2nd Jan 2014 |
| 2803:bc90::/32 | 4.3B × /64 | LACNIC | AR | 10th Aug 2022 |
| 2803:bca0::/32 | 4.3B × /64 | LACNIC | CL | 11th Jul 2018 |
| 2803:bcc0::/32 | 4.3B × /64 | LACNIC | AR | 29th Nov 2016 |
| 2803:bce0::/32 | 4.3B × /64 | LACNIC |  PY | 22nd Jan 2020 |
| 2803:bd00::/32 | 4.3B × /64 | LACNIC | AR | 8th Mar 2013 |
| 2803:bd20::/32 | 4.3B × /64 | LACNIC | CL | 23rd Jan 2018 |
| 2803:bd30::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jul 2026 |
| 2803:bd40::/32 | 4.3B × /64 | LACNIC | AR | 8th Mar 2016 |
| 2803:bd60::/32 | 4.3B × /64 | LACNIC | CO | 10th Sept 2019 |
| 2803:bda0::/32 | 4.3B × /64 | LACNIC | PE | 21st Dec 2018 |