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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,239 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:7dc0::/32 | 4.3B × /64 | LACNIC |  AR | 24th May 2017 |
| 2803:7e0::/32 | 4.3B × /64 | LACNIC |  EC | 20th Aug 2020 |
| 2803:7e10::/32 | 4.3B × /64 | LACNIC |  HN | 17th Sept 2021 |
| 2803:7e20::/32 | 4.3B × /64 | LACNIC | AR | 23rd Nov 2017 |
| 2803:7e30::/32 | 4.3B × /64 | LACNIC |  PE | 4th May 2026 |
| 2803:7e40::/32 | 4.3B × /64 | LACNIC | AR | 16th Oct 2015 |
| 2803:7e60::/32 | 4.3B × /64 | LACNIC |  CO | 8th Jul 2019 |
| 2803:7e80::/32 | 4.3B × /64 | LACNIC | AR | 19th May 2014 |
| 2803:7ea0::/32 | 4.3B × /64 | LACNIC | AR | 27th Sept 2018 |
| 2803:7ec0::/32 | 4.3B × /64 | LACNIC | HN | 16th Mar 2017 |
| 2803:7f80::/32 | 4.3B × /64 | LACNIC | AR | 23rd Mar 2015 |
| 2803:7fa0::/32 | 4.3B × /64 | LACNIC | AR | 18th Mar 2019 |
| 2803:7fc0::/32 | 4.3B × /64 | LACNIC | HN | 10th Aug 2017 |
| 2803:7fe0::/32 | 4.3B × /64 | LACNIC | AR | 10th Sept 2020 |
| 2803:8000::/32 | 4.3B × /64 | LACNIC | AR | 26th Jan 2012 |
| 2803:8010::/32 | 4.3B × /64 | LACNIC | AR | 11th Sept 2020 |
| 2803:8020::/32 | 4.3B × /64 | LACNIC | AR | 10th Aug 2017 |
| 2803:8080::/32 | 4.3B × /64 | LACNIC | AR | 2nd Aug 2013 |
| 2803:80a0::/32 | 4.3B × /64 | LACNIC | AR | 23rd Apr 2018 |
| 2803:80c0::/32 | 4.3B × /64 | LACNIC | AR | 19th Aug 2016 |
| 2803:80d0::/32 | 4.3B × /64 | LACNIC |  SV | 22nd Oct 2024 |
| 2803:80e0::/32 | 4.3B × /64 | LACNIC |  VE | 22nd Nov 2019 |
| 2803:8120::/32 | 4.3B × /64 | LACNIC | AR | 23rd Nov 2017 |
| 2803:8130::/32 | 4.3B × /64 | LACNIC | AR | 7th May 2026 |
| 2803:8140::/32 | 4.3B × /64 | LACNIC |  CL | 19th Oct 2015 |
| 2803:81a0::/32 | 4.3B × /64 | LACNIC | AR | 27th Sept 2018 |
| 2803:8210::/32 | 4.3B × /64 | LACNIC | PE | 24th Mar 2021 |
| 2803:82e0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jan 2020 |
| 2803:8300::/32 | 4.3B × /64 | LACNIC | EC | 18th Mar 2013 |
| 2803:8320::/32 | 4.3B × /64 | LACNIC | CL | 29th Jan 2018 |
| 2803:8330::/32 | 4.3B × /64 | LACNIC |  PY | 27th Jul 2026 |
| 2803:8350::/32 | 4.3B × /64 | LACNIC | PE | 17th Jul 2024 |
| 2803:8380::/32 | 4.3B × /64 | LACNIC | AR | 1st Sept 2014 |
| 2803:8390::/32 | 4.3B × /64 | LACNIC | CL | 24th May 2023 |
| 2803:83c0::/32 | 4.3B × /64 | LACNIC | AR | 31st May 2017 |
| 2803:83d0::/32 | 4.3B × /64 | LACNIC |  UY | 17th Sept 2025 |
| 2803:83e0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jul 2020 |
| 2803:8400::/32 | 4.3B × /64 | LACNIC | CO | 20th Mar 2012 |
| 2803:8410::/32 | 4.3B × /64 | LACNIC | AR | 14th Jan 2021 |
| 2803:8430::/32 | 4.3B × /64 | LACNIC | AR | 16th Jan 2026 |
| 2803:8440::/32 | 4.3B × /64 | LACNIC | AR | 26th May 2015 |
| 2803:8450::/32 | 4.3B × /64 | LACNIC | CO | 9th Nov 2023 |
| 2803:8480::/32 | 4.3B × /64 | LACNIC | AR | 29th Oct 2013 |
| 2803:8520::/32 | 4.3B × /64 | LACNIC | EC | 21st Dec 2017 |
| 2803:8550::/32 | 4.3B × /64 | LACNIC | CO | 6th Jun 2024 |
| 2803:8560::/32 | 4.3B × /64 | LACNIC | AR | 14th Aug 2019 |
| 2803:85a0::/32 | 4.3B × /64 | LACNIC | CL | 20th Nov 2018 |
| 2803:860::/32 | 4.3B × /64 | LACNIC | AR | 29th Mar 2019 |
| 2803:8620::/32 | 4.3B × /64 | LACNIC | AR | 30th Oct 2017 |
| 2803:8630::/32 | 4.3B × /64 | LACNIC | CO | 13th Apr 2026 |