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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:5c60::/32 | 4.3B × /64 | LACNIC |  EC | 13th May 2019 |
| 2803:5c90::/32 | 4.3B × /64 | LACNIC |  AR | 10th Aug 2022 |
| 2803:5ca0::/32 | 4.3B × /64 | LACNIC | AR | 6th Jul 2018 |
| 2803:5cc0::/32 | 4.3B × /64 | LACNIC |  HN | 28th Nov 2016 |
| 2803:5cd0::/32 | 4.3B × /64 | LACNIC |  GT | 23rd Jan 2025 |
| 2803:5d00::/32 | 4.3B × /64 | LACNIC |  SV | 5th Mar 2013 |
| 2803:5d0::/32 | 4.3B × /64 | LACNIC |  CL | 10th Jul 2025 |
| 2803:5d30::/32 | 4.3B × /64 | LACNIC | CL | 16th Jul 2026 |
| 2803:5d50::/32 | 4.3B × /64 | LACNIC |  VE | 9th Jul 2024 |
| 2803:5d60::/32 | 4.3B × /64 | LACNIC |  PE | 9th Sept 2019 |
| 2803:5da0::/32 | 4.3B × /64 | LACNIC | HN | 14th Dec 2018 |
| 2803:5dd0::/32 | 4.3B × /64 | LACNIC | VE | 4th Sept 2025 |
| 2803:5de0::/32 | 4.3B × /64 | LACNIC | AR | 10th Jul 2020 |
| 2803:5e0::/32 | 4.3B × /64 | LACNIC | AR | 5th Jun 2020 |
| 2803:5e30::/32 | 4.3B × /64 | LACNIC | VE | 30th Apr 2026 |
| 2803:5e80::/32 | 4.3B × /64 | LACNIC | AR | 15th May 2014 |
| 2803:5ea0::/32 | 4.3B × /64 | LACNIC |  CO | 19th Sept 2018 |
| 2803:5f20::/32 | 4.3B × /64 | LACNIC | AR | 18th Apr 2018 |
| 2803:5f40::/32 | 4.3B × /64 | LACNIC | AR | 9th Aug 2016 |
| 2803:5f50::/32 | 4.3B × /64 | LACNIC | AR | 4th Oct 2024 |
| 2803:5f60::/32 | 4.3B × /64 | LACNIC | AR | 14th Nov 2019 |
| 2803:5f80::/32 | 4.3B × /64 | LACNIC | EC | 10th Mar 2015 |
| 2803:5fc0::/32 | 4.3B × /64 | LACNIC | AR | 3rd Aug 2017 |
| 2803:5fd0::/32 | 4.3B × /64 | LACNIC | CO | 25th Nov 2025 |
| 2803:6010::/32 | 4.3B × /64 | LACNIC | AR | 16th Sept 2020 |
| 2803:6020::/32 | 4.3B × /64 | LACNIC | AR | 17th Aug 2017 |
| 2803:6040::/32 | 4.3B × /64 | LACNIC | AR | 6th Apr 2015 |
| 2803:6060::/32 | 4.3B × /64 | LACNIC | AR | 26th Mar 2019 |
| 2803:6080::/29 | 34.4B × /64 | LACNIC |  US | 23rd Nov 2015 |
| 2803:60::/32 | 4.3B × /64 | LACNIC | AR | 19th Mar 2019 |
| 2803:60c0::/32 | 4.3B × /64 | LACNIC | CL | 31st Aug 2016 |
| 2803:60e0::/32 | 4.3B × /64 | LACNIC | AR | 25th Nov 2019 |
| 2803:610::/32 | 4.3B × /64 | LACNIC | CL | 14th Jul 2021 |
| 2803:6130::/32 | 4.3B × /64 | LACNIC | CO | 12th May 2026 |
| 2803:6160::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jul 2019 |
| 2803:6180::/32 | 4.3B × /64 | LACNIC | HN | 29th May 2014 |
| 2803:61a0::/32 | 4.3B × /64 | LACNIC | AR | 2nd Oct 2018 |
| 2803:61e0::/32 | 4.3B × /64 | LACNIC | AR | 18th May 2020 |
| 2803:6220::/32 | 4.3B × /64 | LACNIC | AR | 9th Oct 2017 |
| 2803:6230::/32 | 4.3B × /64 | LACNIC | AR | 6th Mar 2026 |
| 2803:6260::/32 | 4.3B × /64 | LACNIC | AR | 24th May 2019 |
| 2803:62a0::/32 | 4.3B × /64 | LACNIC | AR | 17th Jul 2018 |
| 2803:62e0::/32 | 4.3B × /64 | LACNIC | CL | 29th Jan 2020 |
| 2803:6300::/32 | 4.3B × /64 | LACNIC | GT | 27th Mar 2013 |
| 2803:630::/32 | 4.3B × /64 | LACNIC | PE | 13th Apr 2026 |
| 2803:6310::/32 | 4.3B × /64 | LACNIC | VE | 28th Jan 2022 |
| 2803:6330::/32 | 4.3B × /64 | LACNIC |  DO | 31st Jul 2026 |
| 2803:6350::/32 | 4.3B × /64 | LACNIC |  CR | 26th Jul 2024 |
| 2803:6360::/32 | 4.3B × /64 | LACNIC | CL | 24th Sept 2019 |
| 2803:63c0::/32 | 4.3B × /64 | LACNIC | AR | 1st Jun 2017 |