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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:4980::/32 | 4.3B × /64 | LACNIC |  AR | 15th Jun 2014 |
| 2803:49c0::/32 | 4.3B × /64 | LACNIC | AR | 4th Apr 2017 |
| 2803:49d0::/32 | 4.3B × /64 | LACNIC |  PA | 16th Jun 2025 |
| 2803:4aa0::/32 | 4.3B × /64 | LACNIC |  CL | 27th Jul 2018 |
| 2803:4ac0::/32 | 4.3B × /64 | LACNIC |  BO | 11th Jan 2017 |
| 2803:4b10::/32 | 4.3B × /64 | LACNIC |  EC | 16th Feb 2022 |
| 2803:4b30::/32 | 4.3B × /64 | LACNIC |  PE | 12th Aug 2026 |
| 2803:4b40::/32 | 4.3B × /64 | LACNIC | AR | 11th May 2016 |
| 2803:4b60::/32 | 4.3B × /64 | LACNIC | AR | 3rd Oct 2019 |
| 2803:4b90::/32 | 4.3B × /64 | LACNIC | PE | 7th Jul 2023 |
| 2803:4ba0::/32 | 4.3B × /64 | LACNIC | PE | 22nd Jan 2019 |
| 2803:4bd0::/32 | 4.3B × /64 | LACNIC | CL | 7th Oct 2025 |
| 2803:4c00::/32 | 4.3B × /64 | LACNIC | EC | 19th Apr 2012 |
| 2803:4c40::/32 | 4.3B × /64 | LACNIC | AR | 25th Jun 2015 |
| 2803:4c80::/32 | 4.3B × /64 | LACNIC | AR | 21st Nov 2013 |
| 2803:4c90::/32 | 4.3B × /64 | LACNIC | AR | 25th Jul 2022 |
| 2803:4ca0::/32 | 4.3B × /64 | LACNIC | EC | 21st Jun 2018 |
| 2803:4cc0::/32 | 4.3B × /64 | LACNIC | AR | 10th Nov 2016 |
| 2803:4d30::/32 | 4.3B × /64 | LACNIC |  DO | 3rd Jul 2026 |
| 2803:4d40::/32 | 4.3B × /64 | LACNIC | AR | 15th Feb 2016 |
| 2803:4d80::/32 | 4.3B × /64 | LACNIC |  CW | 30th Jul 2014 |
| 2803:4da0::/32 | 4.3B × /64 | LACNIC | AR | 30th Nov 2018 |
| 2803:4dd0::/32 | 4.3B × /64 | LACNIC | AR | 12th Aug 2025 |
| 2803:4e20::/32 | 4.3B × /64 | LACNIC | AR | 13th Nov 2017 |
| 2803:4e30::/32 | 4.3B × /64 | LACNIC |  CO | 20th Apr 2026 |
| 2803:4e40::/32 | 4.3B × /64 | LACNIC | AR | 29th Sept 2015 |
| 2803:4ea0::/32 | 4.3B × /64 | LACNIC | CL | 14th Sept 2018 |
| 2803:4f00::/32 | 4.3B × /64 | LACNIC |  VE | 1st Jul 2013 |
| 2803:4f60::/32 | 4.3B × /64 | LACNIC | AR | 5th Nov 2019 |
| 2803:4f90::/32 | 4.3B × /64 | LACNIC | CL | 4th Sept 2023 |
| 2803:5010::/32 | 4.3B × /64 | LACNIC | CL | 21st Sept 2020 |
| 2803:5040::/32 | 4.3B × /64 | LACNIC |  SV | 6th Apr 2015 |
| 2803:5090::/32 | 4.3B × /64 | LACNIC | AR | 16th May 2022 |
| 2803:50::/32 | 4.3B × /64 | LACNIC | CL | 25th Sept 2023 |
| 2803:50a0::/32 | 4.3B × /64 | LACNIC | AR | 8th May 2018 |
| 2803:50c0::/32 | 4.3B × /64 | LACNIC |  CR | 9th Sept 2016 |
| 2803:510::/32 | 4.3B × /64 | LACNIC | AR | 26th Nov 2021 |
| 2803:51c0::/32 | 4.3B × /64 | LACNIC |  SX | 23rd Mar 2017 |
| 2803:51e0::/32 | 4.3B × /64 | LACNIC | AR | 18th May 2020 |
| 2803:520::/32 | 4.3B × /64 | LACNIC | AR | 21st Dec 2017 |
| 2803:5230::/32 | 4.3B × /64 | LACNIC | CO | 11th Mar 2026 |
| 2803:5240::/32 | 4.3B × /64 | LACNIC | AR | 31st Jul 2015 |
| 2803:5260::/32 | 4.3B × /64 | LACNIC | AR | 28th May 2019 |
| 2803:52a0::/32 | 4.3B × /64 | LACNIC | AR | 17th Jul 2018 |
| 2803:52d0::/32 | 4.3B × /64 | LACNIC | PE | 20th Feb 2025 |
| 2803:52e0::/32 | 4.3B × /64 | LACNIC |  GT | 3rd Feb 2020 |
| 2803:5330::/32 | 4.3B × /64 | LACNIC | CL | 3rd Aug 2026 |
| 2803:5340::/32 | 4.3B × /64 | LACNIC | AR | 25th Apr 2016 |
| 2803:53a0::/32 | 4.3B × /64 | LACNIC | PE | 17th Jan 2019 |
| 2803:53c0::/32 | 4.3B × /64 | LACNIC |  GF | 7th Jun 2017 |