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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2804:3cb4::/32 | 4.3B × /64 | LACNIC |  BR | 27th Apr 2017 |
| 2804:3cbc::/32 | 4.3B × /64 | LACNIC | BR | 28th Apr 2017 |
| 2804:3cf0::/32 | 4.3B × /64 | LACNIC | BR | 3rd May 2017 |
| 2804:3cf4::/32 | 4.3B × /64 | LACNIC | BR | 4th May 2017 |
| 2804:3cf8::/32 | 4.3B × /64 | LACNIC | BR | 4th May 2017 |
| 2804:3d3c::/32 | 4.3B × /64 | LACNIC | BR | 8th May 2017 |
| 2804:3dc8::/32 | 4.3B × /64 | LACNIC | BR | 16th May 2017 |
| 2804:3df0::/32 | 4.3B × /64 | LACNIC | BR | 18th May 2017 |
| 2804:3dfc::/32 | 4.3B × /64 | LACNIC | BR | 18th May 2017 |
| 2804:3e20::/32 | 4.3B × /64 | LACNIC | BR | 29th May 2017 |
| 2804:3e30::/32 | 4.3B × /64 | LACNIC | BR | 29th May 2017 |
| 2804:3e88::/32 | 4.3B × /64 | LACNIC | BR | 5th Jun 2017 |
| 2804:3ea0::/32 | 4.3B × /64 | LACNIC | BR | 6th Jun 2017 |
| 2804:3eb8::/32 | 4.3B × /64 | LACNIC | BR | 7th Jun 2017 |
| 2804:3ec0::/32 | 4.3B × /64 | LACNIC | BR | 8th Jun 2017 |
| 2804:3f04::/32 | 4.3B × /64 | LACNIC | BR | 13th Jun 2017 |
| 2804:3f38::/32 | 4.3B × /64 | LACNIC | BR | 20th Jun 2017 |
| 2804:3f70::/32 | 4.3B × /64 | LACNIC | BR | 26th Jun 2017 |
| 2804:3fcc::/32 | 4.3B × /64 | LACNIC | BR | 3rd Jul 2017 |
| 2804:3fd0::/32 | 4.3B × /64 | LACNIC | BR | 4th Jul 2017 |
| 2804:3fe4::/32 | 4.3B × /64 | LACNIC | BR | 5th Jul 2017 |
| 2804:3ff8::/32 | 4.3B × /64 | LACNIC | BR | 5th Jul 2017 |
| 2804:400c::/32 | 4.3B × /64 | LACNIC | BR | 6th Jul 2017 |
| 2804:4020::/32 | 4.3B × /64 | LACNIC | BR | 7th Jul 2017 |
| 2804:402c::/32 | 4.3B × /64 | LACNIC | BR | 11th Jul 2017 |
| 2804:404::/32 | 4.3B × /64 | LACNIC | BR | 1st Mar 2011 |
| 2804:4084::/32 | 4.3B × /64 | LACNIC | BR | 14th Jul 2017 |
| 2804:40e8::/32 | 4.3B × /64 | LACNIC | BR | 21st Jul 2017 |
| 2804:4144::/32 | 4.3B × /64 | LACNIC | BR | 27th Jul 2017 |
| 2804:41e4::/32 | 4.3B × /64 | LACNIC | BR | 9th Aug 2017 |
| 2804:4214::/32 | 4.3B × /64 | LACNIC | BR | 14th Aug 2017 |
| 2804:4228::/32 | 4.3B × /64 | LACNIC | BR | 15th Aug 2017 |
| 2804:422c::/32 | 4.3B × /64 | LACNIC | BR | 16th Aug 2017 |
| 2804:4258::/32 | 4.3B × /64 | LACNIC | BR | 18th Aug 2017 |
| 2804:4294::/32 | 4.3B × /64 | LACNIC | BR | 23rd Aug 2017 |
| 2804:42b0::/32 | 4.3B × /64 | LACNIC | BR | 24th Aug 2017 |
| 2804:42c4::/32 | 4.3B × /64 | LACNIC | BR | 25th Aug 2017 |
| 2804:42dc::/32 | 4.3B × /64 | LACNIC | BR | 28th Aug 2017 |
| 2804:42ec::/32 | 4.3B × /64 | LACNIC | BR | 29th Aug 2017 |
| 2804:435c::/32 | 4.3B × /64 | LACNIC | BR | 4th Sept 2017 |
| 2804:4378::/32 | 4.3B × /64 | LACNIC | BR | 5th Sept 2017 |
| 2804:438::/32 | 4.3B × /64 | LACNIC | BR | 17th Mar 2011 |
| 2804:43e8::/32 | 4.3B × /64 | LACNIC | BR | 15th Sept 2017 |
| 2804:4450::/32 | 4.3B × /64 | LACNIC | BR | 27th Sept 2017 |
| 2804:446c::/32 | 4.3B × /64 | LACNIC | BR | 29th Sept 2017 |
| 2804:447c::/32 | 4.3B × /64 | LACNIC | BR | 2nd Oct 2017 |
| 2804:44d0::/32 | 4.3B × /64 | LACNIC | BR | 6th Oct 2017 |
| 2804:44f4::/32 | 4.3B × /64 | LACNIC | BR | 10th Oct 2017 |
| 2804:4554::/32 | 4.3B × /64 | LACNIC | BR | 16th Oct 2017 |
| 2804:4570::/32 | 4.3B × /64 | LACNIC | BR | 18th Oct 2017 |