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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:bba0::/32 | 4.3B × /64 | LACNIC |  SV | 6th Feb 2019 |
| 2803:bbc0::/32 | 4.3B × /64 | LACNIC |  EC | 5th Jul 2017 |
| 2803:bbd0::/32 | 4.3B × /64 | LACNIC |  CO | 20th Oct 2025 |
| 2803:bc10::/32 | 4.3B × /64 | LACNIC |  AR | 16th Mar 2021 |
| 2803:bc20::/32 | 4.3B × /64 | LACNIC | EC | 5th Oct 2017 |
| 2803:bc30::/32 | 4.3B × /64 | LACNIC |  GT | 26th Feb 2026 |
| 2803:bc50::/32 | 4.3B × /64 | LACNIC | CO | 28th Dec 2023 |
| 2803:bc80::/32 | 4.3B × /64 | LACNIC | CO | 2nd Jan 2014 |
| 2803:bc90::/32 | 4.3B × /64 | LACNIC | AR | 10th Aug 2022 |
| 2803:bca0::/32 | 4.3B × /64 | LACNIC |  CL | 11th Jul 2018 |
| 2803:bcc0::/32 | 4.3B × /64 | LACNIC | AR | 29th Nov 2016 |
| 2803:bce0::/32 | 4.3B × /64 | LACNIC |  PY | 22nd Jan 2020 |
| 2803:bd00::/32 | 4.3B × /64 | LACNIC | AR | 8th Mar 2013 |
| 2803:bd20::/32 | 4.3B × /64 | LACNIC | CL | 23rd Jan 2018 |
| 2803:bd30::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jul 2026 |
| 2803:bd40::/32 | 4.3B × /64 | LACNIC | AR | 8th Mar 2016 |
| 2803:bd60::/32 | 4.3B × /64 | LACNIC | CO | 10th Sept 2019 |
| 2803:bda0::/32 | 4.3B × /64 | LACNIC |  PE | 21st Dec 2018 |
| 2803:bde0::/32 | 4.3B × /64 | LACNIC | CL | 15th Jul 2020 |
| 2803:be0::/32 | 4.3B × /64 | LACNIC |  BO | 10th Aug 2020 |
| 2803:be10::/32 | 4.3B × /64 | LACNIC | AR | 17th Sept 2021 |
| 2803:be50::/32 | 4.3B × /64 | LACNIC | EC | 25th Apr 2024 |
| 2803:be60::/32 | 4.3B × /64 | LACNIC | CL | 5th Jul 2019 |
| 2803:be90::/32 | 4.3B × /64 | LACNIC | AR | 22nd Dec 2022 |
| 2803:bed0::/32 | 4.3B × /64 | LACNIC |  CW | 22nd May 2025 |
| 2803:bf00::/32 | 4.3B × /64 | LACNIC | AR | 22nd Jul 2013 |
| 2803:bf50::/32 | 4.3B × /64 | LACNIC | CO | 15th Oct 2024 |
| 2803:bfd0::/32 | 4.3B × /64 | LACNIC |  DO | 28th Nov 2025 |
| 2803:c020::/32 | 4.3B × /64 | LACNIC | AR | 10th Aug 2017 |
| 2803:c0d0::/32 | 4.3B × /64 | LACNIC |  TT | 24th Oct 2024 |
| 2803:c0e0::/32 | 4.3B × /64 | LACNIC | AR | 22nd Nov 2019 |
| 2803:c10::/32 | 4.3B × /64 | LACNIC | CL | 26th Feb 2021 |
| 2803:c120::/32 | 4.3B × /64 | LACNIC | CL | 23rd Nov 2017 |
| 2803:c130::/32 | 4.3B × /64 | LACNIC | CO | 8th May 2026 |
| 2803:c140::/32 | 4.3B × /64 | LACNIC | AR | 20th Oct 2015 |
| 2803:c190::/32 | 4.3B × /64 | LACNIC | AR | 3rd Jan 2023 |
| 2803:c1c0::/32 | 4.3B × /64 | LACNIC | AR | 17th Mar 2017 |
| 2803:c220::/32 | 4.3B × /64 | LACNIC | EC | 9th Oct 2017 |
| 2803:c230::/32 | 4.3B × /64 | LACNIC | PY | 6th Mar 2026 |
| 2803:c260::/32 | 4.3B × /64 | LACNIC | DO | 21st May 2019 |
| 2803:c2a0::/32 | 4.3B × /64 | LACNIC | CL | 13th Jul 2018 |
| 2803:c320::/32 | 4.3B × /64 | LACNIC | PE | 30th Jan 2018 |
| 2803:c330::/32 | 4.3B × /64 | LACNIC |  VE | 28th Jul 2026 |
| 2803:c350::/32 | 4.3B × /64 | LACNIC | GT | 23rd Jul 2024 |
| 2803:c360::/32 | 4.3B × /64 | LACNIC | AR | 16th Sept 2019 |
| 2803:c3a0::/32 | 4.3B × /64 | LACNIC | PE | 2nd Jan 2019 |
| 2803:c440::/32 | 4.3B × /64 | LACNIC | AR | 4th Jun 2015 |
| 2803:c490::/32 | 4.3B × /64 | LACNIC | AR | 24th Jun 2022 |
| 2803:c4a0::/32 | 4.3B × /64 | LACNIC | AR | 6th Jun 2018 |
| 2803:c500::/32 | 4.3B × /64 | LACNIC | AR | 29th Nov 2012 |