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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:f3e0::/32 | 4.3B × /64 | LACNIC |  AR | 10th Aug 2020 |
| 2803:f410::/32 | 4.3B × /64 | LACNIC |  GY | 25th Feb 2021 |
| 2803:f430::/32 | 4.3B × /64 | LACNIC | AR | 6th Feb 2026 |
| 2803:f460::/32 | 4.3B × /64 | LACNIC | AR | 2nd May 2019 |
| 2803:f480::/32 | 4.3B × /64 | LACNIC |  CO | 15th Nov 2013 |
| 2803:f50::/32 | 4.3B × /64 | LACNIC |  PE | 23rd Sept 2024 |
| 2803:f530::/32 | 4.3B × /64 | LACNIC | CO | 2nd Jul 2026 |
| 2803:f5a0::/32 | 4.3B × /64 | LACNIC |  CL | 29th Nov 2018 |
| 2803:f5d0::/32 | 4.3B × /64 | LACNIC |  GT | 8th Aug 2025 |
| 2803:f600::/32 | 4.3B × /64 | LACNIC |  CR | 3rd Sept 2012 |
| 2803:f620::/32 | 4.3B × /64 | LACNIC | PE | 9th Nov 2017 |
| 2803:f630::/32 | 4.3B × /64 | LACNIC |  VE | 20th Apr 2026 |
| 2803:f660::/32 | 4.3B × /64 | LACNIC | AR | 21st Jun 2019 |
| 2803:f6d0::/32 | 4.3B × /64 | LACNIC | AR | 28th Apr 2025 |
| 2803:f700::/32 | 4.3B × /64 | LACNIC | AR | 26th Jun 2013 |
| 2803:f740::/32 | 4.3B × /64 | LACNIC | AR | 26th Jul 2016 |
| 2803:f7a0::/32 | 4.3B × /64 | LACNIC | VE | 28th Feb 2019 |
| 2803:f7c0::/32 | 4.3B × /64 | LACNIC | AR | 14th Jul 2017 |
| 2803:f810::/32 | 4.3B × /64 | LACNIC | CL | 29th Dec 2020 |
| 2803:f8a0::/32 | 4.3B × /64 | LACNIC | CL | 1st Jun 2018 |
| 2803:f8e0::/32 | 4.3B × /64 | LACNIC | CR | 23rd Dec 2019 |
| 2803:f910::/32 | 4.3B × /64 | LACNIC | AR | 24th Nov 2021 |
| 2803:f930::/32 | 4.3B × /64 | LACNIC | AR | 17th Jun 2026 |
| 2803:f940::/32 | 4.3B × /64 | LACNIC |  SX | 22nd Dec 2015 |
| 2803:f980::/32 | 4.3B × /64 | LACNIC | CL | 1st Jul 2014 |
| 2803:f9a0::/32 | 4.3B × /64 | LACNIC | AR | 16th Nov 2018 |
| 2803:fa00::/32 | 4.3B × /64 | LACNIC |  BO | 30th Jul 2012 |
| 2803:fa0::/32 | 4.3B × /64 | LACNIC | AR | 1st Mar 2019 |
| 2803:fa20::/32 | 4.3B × /64 | LACNIC | AR | 30th Oct 2017 |
| 2803:fa40::/32 | 4.3B × /64 | LACNIC |  SV | 27th Aug 2015 |
| 2803:fa60::/32 | 4.3B × /64 | LACNIC | VE | 7th Jun 2019 |
| 2803:faa0::/32 | 4.3B × /64 | LACNIC | AR | 15th Aug 2018 |
| 2803:fac0::/32 | 4.3B × /64 | LACNIC | AR | 31st Jan 2017 |
| 2803:fad0::/32 | 4.3B × /64 | LACNIC |  DO | 8th Apr 2025 |
| 2803:fb10::/32 | 4.3B × /64 | LACNIC | VE | 18th Mar 2022 |
| 2803:fb20::/32 | 4.3B × /64 | LACNIC | AR | 12th Mar 2018 |
| 2803:fb30::/32 | 4.3B × /64 | LACNIC |  PY | 27th Aug 2026 |
| 2803:fb40::/32 | 4.3B × /64 | LACNIC | CR | 9th Jun 2016 |
| 2803:fb50::/32 | 4.3B × /64 | LACNIC |  EC | 4th Sept 2024 |
| 2803:fb80::/32 | 4.3B × /64 | LACNIC | AR | 12th Nov 2014 |
| 2803:fba0::/32 | 4.3B × /64 | LACNIC | AR | 8th Feb 2019 |
| 2803:fc00::/32 | 4.3B × /64 | LACNIC | PY | 20th Aug 2014 |
| 2803:fc0::/32 | 4.3B × /64 | LACNIC | EC | 20th Jul 2017 |
| 2803:fc20::/32 | 4.3B × /64 | LACNIC | EC | 5th Oct 2017 |
| 2803:fc30::/32 | 4.3B × /64 | LACNIC | CO | 26th Feb 2026 |
| 2803:fc60::/32 | 4.3B × /64 | LACNIC | AR | 17th May 2019 |
| 2803:fc80::/32 | 4.3B × /64 | LACNIC | AR | 9th Jan 2014 |
| 2803:fcc0::/32 | 4.3B × /64 | LACNIC | CL | 5th Dec 2016 |
| 2803:fcd0::/32 | 4.3B × /64 | LACNIC | CO | 6th Feb 2025 |
| 2803:fce0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jan 2020 |