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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:ad00::/32 | 4.3B × /64 | LACNIC |  AR | 15th Feb 2013 |
| 2803:ad30::/32 | 4.3B × /64 | LACNIC | AR | 8th Jul 2026 |
| 2803:ad60::/32 | 4.3B × /64 | LACNIC |  VE | 5th Sept 2019 |
| 2803:ada0::/32 | 4.3B × /64 | LACNIC | AR | 10th Dec 2018 |
| 2803:add0::/32 | 4.3B × /64 | LACNIC |  HN | 13th Aug 2025 |
| 2803:ae00::/32 | 4.3B × /64 | LACNIC | AR | 10th Sept 2012 |
| 2803:ae0::/32 | 4.3B × /64 | LACNIC |  PY | 6th Feb 2020 |
| 2803:ae20::/32 | 4.3B × /64 | LACNIC |  CR | 14th Nov 2017 |
| 2803:ae30::/32 | 4.3B × /64 | LACNIC |  CO | 23rd Apr 2026 |
| 2803:aec0::/32 | 4.3B × /64 | LACNIC | HN | 7th Mar 2017 |
| 2803:aed0::/32 | 4.3B × /64 | LACNIC | VE | 2nd May 2025 |
| 2803:af00::/32 | 4.3B × /64 | LACNIC | AR | 8th Jul 2013 |
| 2803:af20::/32 | 4.3B × /64 | LACNIC | AR | 13th Apr 2018 |
| 2803:af30::/32 | 4.3B × /64 | LACNIC |  EC | 23rd Sept 2026 |
| 2803:af60::/32 | 4.3B × /64 | LACNIC |  SV | 7th Nov 2019 |
| 2803:afa0::/32 | 4.3B × /64 | LACNIC | AR | 8th Mar 2019 |
| 2803:afc0::/32 | 4.3B × /64 | LACNIC | AR | 1st Aug 2017 |
| 2803:afd0::/32 | 4.3B × /64 | LACNIC |  CL | 18th Nov 2025 |
| 2803:b010::/32 | 4.3B × /64 | LACNIC | AR | 6th Oct 2020 |
| 2803:b020::/32 | 4.3B × /64 | LACNIC | AR | 21st Aug 2017 |
| 2803:b030::/32 | 4.3B × /64 | LACNIC | CL | 19th Dec 2025 |
| 2803:b060::/32 | 4.3B × /64 | LACNIC |  PE | 28th Mar 2019 |
| 2803:b080::/32 | 4.3B × /64 | LACNIC |  BZ | 27th Aug 2013 |
| 2803:b0b0::/32 | 4.3B × /64 | LACNIC | CO | 16th Oct 2026 |
| 2803:b110::/32 | 4.3B × /64 | LACNIC | CL | 15th Oct 2021 |
| 2803:b160::/32 | 4.3B × /64 | LACNIC | VE | 26th Jul 2019 |
| 2803:b180::/32 | 4.3B × /64 | LACNIC | CL | 4th Jun 2014 |
| 2803:b1c0::/32 | 4.3B × /64 | LACNIC | CL | 24th Mar 2017 |
| 2803:b1d0::/32 | 4.3B × /64 | LACNIC | AR | 16th Jun 2025 |
| 2803:b200::/32 | 4.3B × /64 | LACNIC |  UY | 25th Jun 2012 |
| 2803:b20::/32 | 4.3B × /64 | LACNIC | AR | 20th Feb 2018 |
| 2803:b230::/32 | 4.3B × /64 | LACNIC |  DO | 12th Mar 2026 |
| 2803:b250::/32 | 4.3B × /64 | LACNIC | AR | 23rd Jan 2024 |
| 2803:b260::/32 | 4.3B × /64 | LACNIC | AR | 29th May 2019 |
| 2803:b280::/32 | 4.3B × /64 | LACNIC | CL | 7th Feb 2014 |
| 2803:b2e0::/32 | 4.3B × /64 | LACNIC | AR | 5th Feb 2020 |
| 2803:b30::/32 | 4.3B × /64 | LACNIC | VE | 11th Aug 2026 |
| 2803:b330::/32 | 4.3B × /64 | LACNIC | CL | 7th Aug 2026 |
| 2803:b340::/32 | 4.3B × /64 | LACNIC |  SX | 6th May 2016 |
| 2803:b360::/32 | 4.3B × /64 | LACNIC | AR | 30th Sept 2019 |
| 2803:b380::/32 | 4.3B × /64 | LACNIC | AR | 24th Sept 2014 |
| 2803:b3e0::/32 | 4.3B × /64 | LACNIC | PE | 31st Jul 2020 |
| 2803:b400::/32 | 4.3B × /64 | LACNIC | VE | 11th Apr 2012 |
| 2803:b420::/32 | 4.3B × /64 | LACNIC | EC | 26th Sept 2017 |
| 2803:b490::/32 | 4.3B × /64 | LACNIC | CO | 22nd Jul 2022 |
| 2803:b4::/32 | 4.3B × /64 | LACNIC | BZ | 15th Apr 2015 |
| 2803:b4a0::/32 | 4.3B × /64 | LACNIC | AR | 13th Jun 2018 |
| 2803:b50::/32 | 4.3B × /64 | LACNIC | VE | 14th Aug 2024 |
| 2803:b520::/32 | 4.3B × /64 | LACNIC | AR | 4th Jan 2018 |
| 2803:b560::/32 | 4.3B × /64 | LACNIC | CR | 28th Aug 2019 |