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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:38e0::/32 | 4.3B × /64 | LACNIC |  HN | 19th Dec 2019 |
| 2803:3900::/32 | 4.3B × /64 | LACNIC |  VE | 16th Nov 2012 |
| 2803:3940::/32 | 4.3B × /64 | LACNIC |  AR | 17th Dec 2015 |
| 2803:3990::/32 | 4.3B × /64 | LACNIC | VE | 8th Mar 2023 |
| 2803:39a0::/32 | 4.3B × /64 | LACNIC |  CL | 12th Nov 2018 |
| 2803:39c0::/32 | 4.3B × /64 | LACNIC | CL | 21st Apr 2017 |
| 2803:3a40::/32 | 4.3B × /64 | LACNIC | CL | 20th Aug 2015 |
| 2803:3a60::/32 | 4.3B × /64 | LACNIC |  PE | 7th Jun 2019 |
| 2803:3aa0::/32 | 4.3B × /64 | LACNIC |  PY | 6th Aug 2018 |
| 2803:3ac0::/32 | 4.3B × /64 | LACNIC | AR | 27th Jan 2017 |
| 2803:3ad0::/32 | 4.3B × /64 | LACNIC |  CO | 31st Mar 2025 |
| 2803:3ae0::/32 | 4.3B × /64 | LACNIC | CL | 17th Feb 2020 |
| 2803:3b10::/32 | 4.3B × /64 | LACNIC |  GT | 10th Mar 2022 |
| 2803:3b20::/32 | 4.3B × /64 | LACNIC | CL | 12th Mar 2018 |
| 2803:3b30::/32 | 4.3B × /64 | LACNIC | PE | 20th Aug 2026 |
| 2803:3b40::/32 | 4.3B × /64 | LACNIC | AR | 8th Jun 2016 |
| 2803:3bc0::/32 | 4.3B × /64 | LACNIC | PY | 30th Jun 2017 |
| 2803:3c00::/32 | 4.3B × /64 | LACNIC |  EC | 24th May 2012 |
| 2803:3c0::/32 | 4.3B × /64 | LACNIC | PY | 26th May 2017 |
| 2803:3c10::/32 | 4.3B × /64 | LACNIC | AR | 16th Mar 2021 |
| 2803:3c20::/32 | 4.3B × /64 | LACNIC | EC | 4th Oct 2017 |
| 2803:3c30::/32 | 4.3B × /64 | LACNIC | VE | 25th Feb 2026 |
| 2803:3c50::/32 | 4.3B × /64 | LACNIC | GT | 27th Dec 2023 |
| 2803:3c60::/32 | 4.3B × /64 | LACNIC | AR | 13th May 2019 |
| 2803:3ca0::/32 | 4.3B × /64 | LACNIC | AR | 10th Jul 2018 |
| 2803:3cc0::/32 | 4.3B × /64 | LACNIC | CL | 29th Nov 2016 |
| 2803:3ce0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jan 2020 |
| 2803:3d00::/32 | 4.3B × /64 | LACNIC |  BZ | 7th Mar 2013 |
| 2803:3d30::/32 | 4.3B × /64 | LACNIC | AR | 21st Jul 2026 |
| 2803:3d80::/32 | 4.3B × /64 | LACNIC | AR | 26th Aug 2014 |
| 2803:3d90::/32 | 4.3B × /64 | LACNIC | EC | 17th May 2023 |
| 2803:3da0::/32 | 4.3B × /64 | LACNIC | PE | 20th Dec 2018 |
| 2803:3dc0::/32 | 4.3B × /64 | LACNIC | CO | 24th May 2017 |
| 2803:3de0::/32 | 4.3B × /64 | LACNIC | AR | 13th Jul 2020 |
| 2803:3e00::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2012 |
| 2803:3e50::/32 | 4.3B × /64 | LACNIC | PE | 24th Apr 2024 |
| 2803:3e60::/32 | 4.3B × /64 | LACNIC | AR | 4th Jul 2019 |
| 2803:3e80::/32 | 4.3B × /64 | LACNIC | CO | 15th May 2014 |
| 2803:3ed0::/32 | 4.3B × /64 | LACNIC | GT | 22nd May 2025 |
| 2803:3ee0::/32 | 4.3B × /64 | LACNIC | AR | 30th Apr 2020 |
| 2803:3f00::/32 | 4.3B × /64 | LACNIC | HN | 22nd Jul 2013 |
| 2803:3fc0::/32 | 4.3B × /64 | LACNIC | AR | 10th Aug 2017 |
| 2803:3fd0::/32 | 4.3B × /64 | LACNIC |  NI | 27th Nov 2025 |
| 2803:400::/32 | 4.3B × /64 | LACNIC | AR | 19th Mar 2012 |
| 2803:4030::/32 | 4.3B × /64 | LACNIC |  DO | 8th Dec 2025 |
| 2803:4060::/32 | 4.3B × /64 | LACNIC | CL | 20th Mar 2019 |
| 2803:4090::/32 | 4.3B × /64 | LACNIC | AR | 28th Apr 2022 |
| 2803:40::/32 | 4.3B × /64 | LACNIC | PE | 22nd Dec 2016 |
| 2803:40d0::/32 | 4.3B × /64 | LACNIC | CL | 24th Oct 2024 |
| 2803:4100::/32 | 4.3B × /64 | LACNIC | AR | 28th Sept 2012 |