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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:410::/32 | 4.3B × /64 | LACNIC |  CL | 4th Jan 2021 |
| 2803:4110::/32 | 4.3B × /64 | LACNIC |  AR | 27th Sept 2021 |
| 2803:4130::/32 | 4.3B × /64 | LACNIC | AR | 8th May 2026 |
| 2803:4140::/32 | 4.3B × /64 | LACNIC | AR | 20th Oct 2015 |
| 2803:41c0::/32 | 4.3B × /64 | LACNIC | CL | 17th Mar 2017 |
| 2803:4200::/32 | 4.3B × /64 | LACNIC | CL | 30th May 2012 |
| 2803:4260::/32 | 4.3B × /64 | LACNIC | AR | 21st May 2019 |
| 2803:42a0::/32 | 4.3B × /64 | LACNIC | CL | 13th Jul 2018 |
| 2803:42c0::/32 | 4.3B × /64 | LACNIC |  HN | 15th Dec 2016 |
| 2803:42e0::/32 | 4.3B × /64 | LACNIC | HN | 24th Jan 2020 |
| 2803:4330::/32 | 4.3B × /64 | LACNIC |  VE | 28th Jul 2026 |
| 2803:4340::/32 | 4.3B × /64 | LACNIC |  CO | 22nd Mar 2016 |
| 2803:4360::/32 | 4.3B × /64 | LACNIC | HN | 16th Sept 2019 |
| 2803:43a0::/32 | 4.3B × /64 | LACNIC | CL | 28th Dec 2018 |
| 2803:43c0::/32 | 4.3B × /64 | LACNIC | CL | 1st Jun 2017 |
| 2803:43e0::/32 | 4.3B × /64 | LACNIC | CL | 22nd Jul 2020 |
| 2803:4400::/32 | 4.3B × /64 | LACNIC | AR | 20th Mar 2012 |
| 2803:4420::/32 | 4.3B × /64 | LACNIC | AR | 7th Sept 2017 |
| 2803:4430::/32 | 4.3B × /64 | LACNIC | CL | 21st Jan 2026 |
| 2803:4490::/32 | 4.3B × /64 | LACNIC | VE | 23rd Jun 2022 |
| 2803:44a0::/32 | 4.3B × /64 | LACNIC | AR | 6th Jun 2018 |
| 2803:44c0::/32 | 4.3B × /64 | LACNIC |  BZ | 18th Oct 2016 |
| 2803:44e0::/32 | 4.3B × /64 | LACNIC |  PE | 2nd Jan 2020 |
| 2803:4540::/32 | 4.3B × /64 | LACNIC | HN | 30th Dec 2015 |
| 2803:4550::/32 | 4.3B × /64 | LACNIC | AR | 6th Jun 2024 |
| 2803:4560::/32 | 4.3B × /64 | LACNIC | AR | 14th Aug 2019 |
| 2803:45e0::/32 | 4.3B × /64 | LACNIC |  PY | 8th Jun 2020 |
| 2803:460::/32 | 4.3B × /64 | LACNIC | AR | 10th Apr 2019 |
| 2803:4610::/32 | 4.3B × /64 | LACNIC | VE | 14th Jul 2021 |
| 2803:4620::/32 | 4.3B × /64 | LACNIC | CO | 30th Oct 2017 |
| 2803:4630::/32 | 4.3B × /64 | LACNIC | CO | 13th Apr 2026 |
| 2803:4650::/32 | 4.3B × /64 | LACNIC | CO | 4th Mar 2024 |
| 2803:4660::/32 | 4.3B × /64 | LACNIC | AR | 10th Jun 2019 |
| 2803:46c0::/32 | 4.3B × /64 | LACNIC |  EC | 6th Feb 2017 |
| 2803:4710::/32 | 4.3B × /64 | LACNIC |  PA | 23rd Mar 2022 |
| 2803:4720::/32 | 4.3B × /64 | LACNIC | CL | 19th Mar 2018 |
| 2803:4730::/32 | 4.3B × /64 | LACNIC |  SV | 2nd Sept 2026 |
| 2803:4740::/32 | 4.3B × /64 | LACNIC | VE | 20th Jun 2016 |
| 2803:4760::/32 | 4.3B × /64 | LACNIC | AR | 22nd Oct 2019 |
| 2803:47a0::/32 | 4.3B × /64 | LACNIC | AR | 15th Feb 2019 |
| 2803:47d0::/32 | 4.3B × /64 | LACNIC | HN | 28th Oct 2025 |
| 2803:4800::/32 | 4.3B × /64 | LACNIC | PE | 24th Feb 2012 |
| 2803:4830::/32 | 4.3B × /64 | LACNIC | AR | 23rd Dec 2025 |
| 2803:48c0::/32 | 4.3B × /64 | LACNIC |  GT | 20th Sept 2016 |
| 2803:4900::/32 | 4.3B × /64 | LACNIC |  BQ | 23rd Oct 2012 |
| 2803:4910::/32 | 4.3B × /64 | LACNIC |  CR | 22nd Oct 2021 |
| 2803:4920::/32 | 4.3B × /64 | LACNIC | CR | 6th Dec 2017 |
| 2803:4930::/32 | 4.3B × /64 | LACNIC | CO | 2nd Jun 2026 |
| 2803:4940::/32 | 4.3B × /64 | LACNIC | AR | 20th Nov 2015 |
| 2803:4960::/32 | 4.3B × /64 | LACNIC | CL | 30th Jul 2019 |