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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:9c20::/32 | 4.3B × /64 | LACNIC |  EC | 3rd Oct 2017 |
| 2803:9c40::/32 | 4.3B × /64 | LACNIC |  AR | 6th Jul 2015 |
| 2803:9c80::/32 | 4.3B × /64 | LACNIC | AR | 26th Dec 2013 |
| 2803:9cd0::/32 | 4.3B × /64 | LACNIC |  CR | 21st Jan 2025 |
| 2803:9d00::/32 | 4.3B × /64 | LACNIC |  SV | 1st Mar 2013 |
| 2803:9d40::/32 | 4.3B × /64 | LACNIC |  HN | 26th Feb 2016 |
| 2803:9dd0::/32 | 4.3B × /64 | LACNIC | CR | 26th Aug 2025 |
| 2803:9de0::/32 | 4.3B × /64 | LACNIC | AR | 10th Jul 2020 |
| 2803:9e00::/32 | 4.3B × /64 | LACNIC | AR | 13th Sept 2012 |
| 2803:9e0::/32 | 4.3B × /64 | LACNIC | AR | 26th May 2020 |
| 2803:9e10::/32 | 4.3B × /64 | LACNIC |  PE | 8th Sept 2021 |
| 2803:9e80::/32 | 4.3B × /64 | LACNIC |  CL | 15th May 2014 |
| 2803:9ea0::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2018 |
| 2803:9ec0::/32 | 4.3B × /64 | LACNIC | CR | 10th Mar 2017 |
| 2803:9ee0::/32 | 4.3B × /64 | LACNIC | CL | 28th Apr 2020 |
| 2803:9f50::/32 | 4.3B × /64 | LACNIC | PE | 3rd Oct 2024 |
| 2803:9f60::/32 | 4.3B × /64 | LACNIC | AR | 13th Nov 2019 |
| 2803:9f90::/32 | 4.3B × /64 | LACNIC |  CO | 15th Sept 2023 |
| 2803:9fa0::/32 | 4.3B × /64 | LACNIC |  PY | 12th Mar 2019 |
| 2803::/32 | 4.3B × /64 | LACNIC | AR | 26th Jan 2012 |
| 2803:a020::/32 | 4.3B × /64 | LACNIC | AR | 15th Aug 2017 |
| 2803:a030::/32 | 4.3B × /64 | LACNIC | PE | 10th Dec 2025 |
| 2803:a080::/32 | 4.3B × /64 | LACNIC | AR | 12th Aug 2013 |
| 2803:a090::/32 | 4.3B × /64 | LACNIC | CL | 2nd May 2022 |
| 2803:a0c0::/32 | 4.3B × /64 | LACNIC | AR | 29th Aug 2016 |
| 2803:a0e0::/32 | 4.3B × /64 | LACNIC | AR | 25th Nov 2019 |
| 2803:a120::/32 | 4.3B × /64 | LACNIC | AR | 24th Nov 2017 |
| 2803:a130::/32 | 4.3B × /64 | LACNIC | CO | 11th May 2026 |
| 2803:a140::/32 | 4.3B × /64 | LACNIC | CO | 26th Oct 2015 |
| 2803:a1a0::/32 | 4.3B × /64 | LACNIC | AR | 2nd Oct 2018 |
| 2803:a220::/32 | 4.3B × /64 | LACNIC | AR | 9th Oct 2017 |
| 2803:a230::/32 | 4.3B × /64 | LACNIC |  BO | 6th Mar 2026 |
| 2803:a250::/32 | 4.3B × /64 | LACNIC | HN | 16th Jan 2024 |
| 2803:a260::/32 | 4.3B × /64 | LACNIC | AR | 24th May 2019 |
| 2803:a280::/32 | 4.3B × /64 | LACNIC |  DO | 27th Jan 2014 |
| 2803:a2c0::/32 | 4.3B × /64 | LACNIC | CL | 22nd Dec 2016 |
| 2803:a2d0::/32 | 4.3B × /64 | LACNIC | AR | 17th Feb 2025 |
| 2803:a30::/32 | 4.3B × /64 | LACNIC |  VE | 17th Mar 2026 |
| 2803:a340::/32 | 4.3B × /64 | LACNIC | AR | 8th Apr 2016 |
| 2803:a380::/32 | 4.3B × /64 | LACNIC |  PA | 2nd Sept 2014 |
| 2803:a3c0::/32 | 4.3B × /64 | LACNIC | AR | 1st Jun 2017 |
| 2803:a3d0::/32 | 4.3B × /64 | LACNIC | VE | 23rd Sept 2025 |
| 2803:a400::/32 | 4.3B × /64 | LACNIC | EC | 23rd Mar 2012 |
| 2803:a430::/32 | 4.3B × /64 | LACNIC | PY | 26th Jan 2026 |
| 2803:a460::/32 | 4.3B × /64 | LACNIC | AR | 23rd Apr 2019 |
| 2803:a490::/32 | 4.3B × /64 | LACNIC |  GT | 1st Jul 2022 |
| 2803:a4c0::/32 | 4.3B × /64 | LACNIC | AR | 20th Oct 2016 |
| 2803:a4d0::/32 | 4.3B × /64 | LACNIC | AR | 19th Dec 2024 |
| 2803:a580::/32 | 4.3B × /64 | LACNIC |  HT | 9th Jul 2014 |
| 2803:a590::/32 | 4.3B × /64 | LACNIC | PY | 29th Mar 2023 |