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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2803:3130::/32 | 4.3B × /64 | LACNIC |  CO | 26th May 2026 |
| 2803:3160::/32 | 4.3B × /64 | LACNIC |  CL | 26th Jul 2019 |
| 2803:3180::/32 | 4.3B × /64 | LACNIC |  AR | 4th Jun 2014 |
| 2803:31a0::/32 | 4.3B × /64 | LACNIC | CO | 10th Oct 2018 |
| 2803:31c0::/32 | 4.3B × /64 | LACNIC | AR | 24th Mar 2017 |
| 2803:31d0::/32 | 4.3B × /64 | LACNIC | CL | 11th Jun 2025 |
| 2803:31e0::/32 | 4.3B × /64 | LACNIC | AR | 20th May 2020 |
| 2803:3200::/32 | 4.3B × /64 | LACNIC |  CR | 22nd Jun 2012 |
| 2803:320::/32 | 4.3B × /64 | LACNIC | AR | 26th Jan 2018 |
| 2803:3230::/32 | 4.3B × /64 | LACNIC |  PE | 11th Mar 2026 |
| 2803:3260::/32 | 4.3B × /64 | LACNIC | AR | 29th May 2019 |
| 2803:32a0::/32 | 4.3B × /64 | LACNIC |  PY | 20th Jul 2018 |
| 2803:330::/32 | 4.3B × /64 | LACNIC | CO | 24th Jul 2026 |
| 2803:3320::/32 | 4.3B × /64 | LACNIC | CL | 14th Feb 2018 |
| 2803:3330::/32 | 4.3B × /64 | LACNIC | CO | 7th Aug 2026 |
| 2803:3390::/32 | 4.3B × /64 | LACNIC |  VE | 15th Jun 2023 |
| 2803:33d0::/32 | 4.3B × /64 | LACNIC |  DO | 29th Sept 2025 |
| 2803:3400::/32 | 4.3B × /64 | LACNIC |  PA | 11th Apr 2012 |
| 2803:3410::/32 | 4.3B × /64 | LACNIC | CL | 19th Feb 2021 |
| 2803:3420::/32 | 4.3B × /64 | LACNIC |  CW | 20th Sept 2017 |
| 2803:3460::/32 | 4.3B × /64 | LACNIC | AR | 30th Apr 2019 |
| 2803:350::/32 | 4.3B × /64 | LACNIC | PE | 17th Jul 2024 |
| 2803:3520::/32 | 4.3B × /64 | LACNIC | PA | 4th Jan 2018 |
| 2803:3530::/32 | 4.3B × /64 | LACNIC | PE | 30th Jun 2026 |
| 2803:3580::/32 | 4.3B × /64 | LACNIC | PE | 24th Jul 2014 |
| 2803:35a0::/32 | 4.3B × /64 | LACNIC | AR | 28th Nov 2018 |
| 2803:35c0::/32 | 4.3B × /64 | LACNIC | AR | 12th May 2017 |
| 2803:35d0::/32 | 4.3B × /64 | LACNIC | VE | 7th Aug 2025 |
| 2803:35e0::/32 | 4.3B × /64 | LACNIC |  TT | 24th Jun 2020 |
| 2803:3600::/32 | 4.3B × /64 | LACNIC | CR | 29th Aug 2012 |
| 2803:3630::/32 | 4.3B × /64 | LACNIC | CO | 17th Apr 2026 |
| 2803:3690::/32 | 4.3B × /64 | LACNIC | AR | 3rd Nov 2022 |
| 2803:36a0::/32 | 4.3B × /64 | LACNIC | AR | 31st Aug 2018 |
| 2803:36e0::/32 | 4.3B × /64 | LACNIC | AR | 13th Mar 2020 |
| 2803:3710::/32 | 4.3B × /64 | LACNIC | CR | 1st Apr 2022 |
| 2803:3740::/32 | 4.3B × /64 | LACNIC | AR | 21st Jul 2016 |
| 2803:3760::/32 | 4.3B × /64 | LACNIC | CL | 31st Oct 2019 |
| 2803:3780::/32 | 4.3B × /64 | LACNIC | AR | 16th Jan 2015 |
| 2803:37c0::/32 | 4.3B × /64 | LACNIC | AR | 13th Jul 2017 |
| 2803:37e0::/32 | 4.3B × /64 | LACNIC | DO | 28th Aug 2020 |
| 2803:3800::/32 | 4.3B × /64 | LACNIC | CL | 16th Mar 2012 |
| 2803:380::/32 | 4.3B × /64 | LACNIC | CL | 31st Aug 2014 |
| 2803:3810::/32 | 4.3B × /64 | LACNIC | CL | 17th Dec 2020 |
| 2803:3820::/32 | 4.3B × /64 | LACNIC |  BO | 5th Sept 2017 |
| 2803:3830::/32 | 4.3B × /64 | LACNIC |  GT | 9th Jan 2026 |
| 2803:3840::/32 | 4.3B × /64 | LACNIC | AR | 19th May 2015 |
| 2803:3860::/32 | 4.3B × /64 | LACNIC | AR | 9th Apr 2019 |
| 2803:38a0::/32 | 4.3B × /64 | LACNIC | AR | 25th May 2018 |
| 2803:38c0::/32 | 4.3B × /64 | LACNIC | BO | 4th Oct 2016 |
| 2803:38d0::/32 | 4.3B × /64 | LACNIC | PE | 2nd Dec 2024 |