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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2804:1d6c::/32 | 4.3B × /64 | LACNIC |  BR | 16th Sept 2014 |
| 2804:1d8c::/32 | 4.3B × /64 | LACNIC | BR | 23rd Sept 2014 |
| 2804:1de4::/32 | 4.3B × /64 | LACNIC | BR | 6th Oct 2014 |
| 2804:1dec::/32 | 4.3B × /64 | LACNIC | BR | 7th Oct 2014 |
| 2804:1df0::/32 | 4.3B × /64 | LACNIC | BR | 7th Oct 2014 |
| 2804:1e8::/32 | 4.3B × /64 | LACNIC | BR | 14th Sept 2010 |
| 2804:1eac::/32 | 4.3B × /64 | LACNIC | BR | 27th Oct 2014 |
| 2804:1ee0::/32 | 4.3B × /64 | LACNIC | BR | 4th Nov 2014 |
| 2804:1f14::/32 | 4.3B × /64 | LACNIC | BR | 3rd Nov 2015 |
| 2804:1f1a::/32 | 4.3B × /64 | LACNIC | BR | 21st Dec 2015 |
| 2804:1f1e::/32 | 4.3B × /64 | LACNIC | BR | 18th Jan 2016 |
| 2804:1f28::/32 | 4.3B × /64 | LACNIC | BR | 13th Jun 2016 |
| 2804:1f2a::/32 | 4.3B × /64 | LACNIC | BR | 24th Jun 2016 |
| 2804:1f30::/32 | 4.3B × /64 | LACNIC | BR | 31st May 2017 |
| 2804:1f3e::/32 | 4.3B × /64 | LACNIC | BR | 10th Sept 2019 |
| 2804:1f40::/32 | 4.3B × /64 | LACNIC | BR | 21st Feb 2020 |
| 2804:1f44::/32 | 4.3B × /64 | LACNIC | BR | 14th May 2020 |
| 2804:1f50::/32 | 4.3B × /64 | LACNIC | BR | 20th May 2021 |
| 2804:1f5c::/32 | 4.3B × /64 | LACNIC | BR | 9th Apr 2024 |
| 2804:1f60::/32 | 4.3B × /64 | LACNIC | BR | 13th Aug 2026 |
| 2804:1f80::/32 | 4.3B × /64 | LACNIC | BR | 16th Jul 2026 |
| 2804:1f8::/32 | 4.3B × /64 | LACNIC | BR | 16th Sept 2010 |
| 2804:202c::/32 | 4.3B × /64 | LACNIC | BR | 17th Nov 2014 |
| 2804:20e8::/32 | 4.3B × /64 | LACNIC | BR | 16th Dec 2014 |
| 2804:210c::/32 | 4.3B × /64 | LACNIC | BR | 18th Dec 2014 |
| 2804:212c::/32 | 4.3B × /64 | LACNIC | BR | 22nd Dec 2014 |
| 2804:2130::/32 | 4.3B × /64 | LACNIC | BR | 22nd Dec 2014 |
| 2804:2158::/32 | 4.3B × /64 | LACNIC | BR | 6th Jan 2015 |
| 2804:216c::/32 | 4.3B × /64 | LACNIC | BR | 8th Jan 2015 |
| 2804:2188::/32 | 4.3B × /64 | LACNIC | BR | 13th Jan 2015 |
| 2804:218c::/32 | 4.3B × /64 | LACNIC | BR | 13th Jan 2015 |
| 2804:21b8::/32 | 4.3B × /64 | LACNIC | BR | 26th Mar 2018 |
| 2804:2208::/32 | 4.3B × /64 | LACNIC | BR | 4th Feb 2015 |
| 2804:2224::/32 | 4.3B × /64 | LACNIC | BR | 9th Feb 2015 |
| 2804:2260::/32 | 4.3B × /64 | LACNIC | BR | 20th Feb 2015 |
| 2804:2274::/32 | 4.3B × /64 | LACNIC | BR | 3rd Mar 2015 |
| 2804:2284::/32 | 4.3B × /64 | LACNIC | BR | 4th Mar 2015 |
| 2804:2298::/32 | 4.3B × /64 | LACNIC | BR | 6th Mar 2015 |
| 2804:22d4::/32 | 4.3B × /64 | LACNIC | BR | 10th Mar 2015 |
| 2804:2368::/32 | 4.3B × /64 | LACNIC | BR | 19th Mar 2015 |
| 2804:239c::/32 | 4.3B × /64 | LACNIC | BR | 24th Mar 2015 |
| 2804:23c8::/32 | 4.3B × /64 | LACNIC | BR | 27th Mar 2015 |
| 2804:23e0::/32 | 4.3B × /64 | LACNIC | BR | 30th Mar 2015 |
| 2804:23f8::/32 | 4.3B × /64 | LACNIC | BR | 2nd Apr 2015 |
| 2804:2434::/32 | 4.3B × /64 | LACNIC | BR | 9th Apr 2015 |
| 2804:246c::/32 | 4.3B × /64 | LACNIC | BR | 23rd Apr 2015 |
| 2804:2480::/32 | 4.3B × /64 | LACNIC | BR | 28th Apr 2015 |
| 2804:2490::/32 | 4.3B × /64 | LACNIC | BR | 30th Apr 2015 |
| 2804:24::/32 | 4.3B × /64 | LACNIC | BR | 8th May 2009 |
| 2804:24a0::/32 | 4.3B × /64 | LACNIC | BR | 5th May 2015 |