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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:1700::/32 | 4.3B × /64 | LACNIC |  AR | 12th Jun 2013 |
| 2803:1710::/32 | 4.3B × /64 | LACNIC |  CO | 28th Mar 2022 |
| 2803:1730::/32 | 4.3B × /64 | LACNIC | CO | 8th Sept 2026 |
| 2803:1760::/32 | 4.3B × /64 | LACNIC | AR | 28th Oct 2019 |
| 2803:17c0::/32 | 4.3B × /64 | LACNIC |  CL | 11th Jul 2017 |
| 2803:1820::/32 | 4.3B × /64 | LACNIC | AR | 1st Sept 2017 |
| 2803:1830::/32 | 4.3B × /64 | LACNIC | CO | 9th Jan 2026 |
| 2803:18a0::/32 | 4.3B × /64 | LACNIC |  PY | 21st May 2018 |
| 2803:18b0::/32 | 4.3B × /64 | LACNIC |  VE | 29th Oct 2026 |
| 2803:18d0::/32 | 4.3B × /64 | LACNIC | VE | 26th Nov 2024 |
| 2803:1940::/32 | 4.3B × /64 | LACNIC | AR | 14th Dec 2015 |
| 2803:1960::/32 | 4.3B × /64 | LACNIC | AR | 5th Aug 2019 |
| 2803:1990::/32 | 4.3B × /64 | LACNIC | CO | 16th Feb 2023 |
| 2803:19a0::/32 | 4.3B × /64 | LACNIC | AR | 5th Nov 2018 |
| 2803:19e0::/32 | 4.3B × /64 | LACNIC |  PE | 3rd Jun 2020 |
| 2803:1a0::/32 | 4.3B × /64 | LACNIC | AR | 27th Sept 2018 |
| 2803:1a10::/32 | 4.3B × /64 | LACNIC | VE | 1st Jul 2021 |
| 2803:1a20::/32 | 4.3B × /64 | LACNIC | AR | 25th Oct 2017 |
| 2803:1aa0::/32 | 4.3B × /64 | LACNIC | AR | 1st Aug 2018 |
| 2803:1ac0::/32 | 4.3B × /64 | LACNIC |  HN | 24th Jan 2017 |
| 2803:1ae0::/32 | 4.3B × /64 | LACNIC | AR | 17th Feb 2020 |
| 2803:1b00::/32 | 4.3B × /64 | LACNIC | AR | 14th May 2013 |
| 2803:1b20::/32 | 4.3B × /64 | LACNIC |  CR | 2nd Mar 2018 |
| 2803:1b60::/32 | 4.3B × /64 | LACNIC | VE | 10th Oct 2019 |
| 2803:1b80::/32 | 4.3B × /64 | LACNIC |  TT | 22nd Oct 2014 |
| 2803:1b90::/32 | 4.3B × /64 | LACNIC | AR | 21st Jul 2023 |
| 2803:1ba0::/32 | 4.3B × /64 | LACNIC | AR | 30th Jan 2019 |
| 2803:1bc0::/32 | 4.3B × /64 | LACNIC | AR | 26th Jun 2017 |
| 2803:1be0::/32 | 4.3B × /64 | LACNIC | AR | 13th Aug 2020 |
| 2803:1c10::/32 | 4.3B × /64 | LACNIC |  SV | 9th Mar 2021 |
| 2803:1c20::/32 | 4.3B × /64 | LACNIC |  EC | 2nd Oct 2017 |
| 2803:1c30::/32 | 4.3B × /64 | LACNIC | CL | 20th Feb 2026 |
| 2803:1c40::/32 | 4.3B × /64 | LACNIC |  NI | 6th Jul 2015 |
| 2803:1c60::/32 | 4.3B × /64 | LACNIC | AR | 10th May 2019 |
| 2803:1ca0::/32 | 4.3B × /64 | LACNIC | CL | 3rd Jul 2018 |
| 2803:1ce0::/32 | 4.3B × /64 | LACNIC | AR | 20th Jan 2020 |
| 2803:1d00::/32 | 4.3B × /64 | LACNIC | AR | 1st Mar 2013 |
| 2803:1d0::/32 | 4.3B × /64 | LACNIC | AR | 30th May 2025 |
| 2803:1d30::/32 | 4.3B × /64 | LACNIC | PE | 9th Jul 2026 |
| 2803:1d60::/32 | 4.3B × /64 | LACNIC | AR | 9th Sept 2019 |
| 2803:1d80::/32 | 4.3B × /64 | LACNIC | AR | 12th Aug 2014 |
| 2803:1e30::/32 | 4.3B × /64 | LACNIC | CO | 24th Apr 2026 |
| 2803:1e40::/32 | 4.3B × /64 | LACNIC | AR | 13th Oct 2015 |
| 2803:1e50::/32 | 4.3B × /64 | LACNIC |  GT | 16th Apr 2024 |
| 2803:1e60::/32 | 4.3B × /64 | LACNIC | AR | 26th Jun 2019 |
| 2803:1e80::/32 | 4.3B × /64 | LACNIC | AR | 15th May 2014 |
| 2803:1ea0::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2018 |
| 2803:1f00::/32 | 4.3B × /64 | LACNIC | AR | 10th Jul 2013 |
| 2803:1f10::/32 | 4.3B × /64 | LACNIC | AR | 13th Apr 2022 |
| 2803:1f20::/32 | 4.3B × /64 | LACNIC | AR | 17th Apr 2018 |