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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,221 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2803:90c0::/32 | 4.3B × /64 | LACNIC |  AR | 7th Sept 2016 |
| 2803:90d0::/32 | 4.3B × /64 | LACNIC | AR | 1st Nov 2024 |
| 2803:90e0::/32 | 4.3B × /64 | LACNIC | AR | 27th Nov 2019 |
| 2803:9190::/32 | 4.3B × /64 | LACNIC |  CO | 12th Jan 2023 |
| 2803:91a0::/32 | 4.3B × /64 | LACNIC |  CL | 5th Oct 2018 |
| 2803:91c0::/32 | 4.3B × /64 | LACNIC | AR | 23rd Mar 2017 |
| 2803:91d0::/32 | 4.3B × /64 | LACNIC | CL | 11th Jun 2025 |
| 2803:91e0::/32 | 4.3B × /64 | LACNIC | CL | 18th May 2020 |
| 2803:920::/32 | 4.3B × /64 | LACNIC | AR | 6th Dec 2017 |
| 2803:9220::/32 | 4.3B × /64 | LACNIC | AR | 11th Oct 2017 |
| 2803:9250::/32 | 4.3B × /64 | LACNIC | CO | 19th Jan 2024 |
| 2803:9280::/32 | 4.3B × /64 | LACNIC | AR | 6th Feb 2014 |
| 2803:92a0::/32 | 4.3B × /64 | LACNIC |  EC | 17th Jul 2018 |
| 2803:92c0::/32 | 4.3B × /64 | LACNIC | AR | 2nd Jan 2017 |
| 2803:930::/32 | 4.3B × /64 | LACNIC |  PE | 2nd Jun 2026 |
| 2803:9330::/32 | 4.3B × /64 | LACNIC |  GT | 3rd Aug 2026 |
| 2803:9380::/32 | 4.3B × /64 | LACNIC | CL | 16th Sept 2014 |
| 2803:9390::/32 | 4.3B × /64 | LACNIC | AR | 12th Jun 2023 |
| 2803:93a0::/32 | 4.3B × /64 | LACNIC | AR | 16th Jan 2019 |
| 2803:93d0::/32 | 4.3B × /64 | LACNIC | AR | 24th Sept 2025 |
| 2803:93e0::/32 | 4.3B × /64 | LACNIC | AR | 29th Jul 2020 |
| 2803:940::/32 | 4.3B × /64 | LACNIC | CL | 19th Nov 2015 |
| 2803:9410::/32 | 4.3B × /64 | LACNIC | CO | 2nd Feb 2021 |
| 2803:9420::/32 | 4.3B × /64 | LACNIC | AR | 18th Sept 2017 |
| 2803:9440::/32 | 4.3B × /64 | LACNIC | AR | 12th Jun 2015 |
| 2803:9480::/32 | 4.3B × /64 | LACNIC | AR | 12th Nov 2013 |
| 2803:94a0::/32 | 4.3B × /64 | LACNIC | AR | 12th Jun 2018 |
| 2803:9500::/32 | 4.3B × /64 | LACNIC | AR | 17th Dec 2012 |
| 2803:950::/32 | 4.3B × /64 | LACNIC |  VE | 20th May 2024 |
| 2803:9520::/32 | 4.3B × /64 | LACNIC | AR | 27th Dec 2017 |
| 2803:9530::/32 | 4.3B × /64 | LACNIC | CL | 26th Jun 2026 |
| 2803:9560::/32 | 4.3B × /64 | LACNIC | AR | 23rd Aug 2019 |
| 2803:95c0::/32 | 4.3B × /64 | LACNIC | CL | 8th May 2017 |
| 2803:95d0::/32 | 4.3B × /64 | LACNIC | PE | 1st Aug 2025 |
| 2803:9620::/32 | 4.3B × /64 | LACNIC | AR | 3rd Nov 2017 |
| 2803:9690::/32 | 4.3B × /64 | LACNIC |  CR | 31st Oct 2022 |
| 2803:96c0::/32 | 4.3B × /64 | LACNIC |  PA | 10th Feb 2017 |
| 2803:96d0::/32 | 4.3B × /64 | LACNIC | AR | 24th Apr 2025 |
| 2803:9720::/32 | 4.3B × /64 | LACNIC | AR | 22nd Mar 2018 |
| 2803:9750::/32 | 4.3B × /64 | LACNIC | VE | 13th Sept 2024 |
| 2803:97e0::/32 | 4.3B × /64 | LACNIC | AR | 27th Aug 2020 |
| 2803:9820::/32 | 4.3B × /64 | LACNIC | AR | 1st Sept 2017 |
| 2803:9850::/32 | 4.3B × /64 | LACNIC | AR | 30th Oct 2023 |
| 2803:9860::/32 | 4.3B × /64 | LACNIC | AR | 8th Apr 2019 |
| 2803:98c0::/32 | 4.3B × /64 | LACNIC | AR | 28th Sept 2016 |
| 2803:98e0::/32 | 4.3B × /64 | LACNIC | CL | 17th Dec 2019 |
| 2803:9910::/32 | 4.3B × /64 | LACNIC |  UY | 3rd Dec 2021 |
| 2803:9920::/32 | 4.3B × /64 | LACNIC | CR | 15th Dec 2017 |
| 2803:9940::/32 | 4.3B × /64 | LACNIC | AR | 15th Dec 2015 |
| 2803:9960::/32 | 4.3B × /64 | LACNIC | VE | 5th Aug 2019 |