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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
84,502 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 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 |
| 2804:41bc::/32 | 4.3B × /64 | LACNIC | BR | 7th Aug 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 |
| 2804:4234::/32 | 4.3B × /64 | LACNIC | BR | 16th Aug 2017 |
| 2804:4258::/32 | 4.3B × /64 | LACNIC | BR | 18th Aug 2017 |
| 2804:4264::/32 | 4.3B × /64 | LACNIC | BR | 18th Aug 2017 |
| 2804:4294::/32 | 4.3B × /64 | LACNIC | BR | 23rd 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 |
| 2804:4478::/32 | 4.3B × /64 | LACNIC | BR | 2nd Oct 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 |
| 2804:4578::/32 | 4.3B × /64 | LACNIC | BR | 18th Oct 2017 |
| 2804:45a0::/32 | 4.3B × /64 | LACNIC | BR | 24th Oct 2017 |
| 2804:4620::/32 | 4.3B × /64 | LACNIC | BR | 1st Nov 2017 |
| 2804:4640::/32 | 4.3B × /64 | LACNIC | BR | 6th Nov 2017 |
| 2804:464::/32 | 4.3B × /64 | LACNIC | BR | 31st Mar 2011 |
| 2804:4664::/32 | 4.3B × /64 | LACNIC | BR | 6th Nov 2017 |
| 2804:4674::/32 | 4.3B × /64 | LACNIC | BR | 7th Nov 2017 |
| 2804:468c::/32 | 4.3B × /64 | LACNIC | BR | 8th Nov 2017 |
| 2804:4690::/32 | 4.3B × /64 | LACNIC | BR | 9th Nov 2017 |
| 2804:46ac::/32 | 4.3B × /64 | LACNIC | BR | 13th Nov 2017 |
| 2804:4730::/32 | 4.3B × /64 | LACNIC | BR | 30th Nov 2017 |
| 2804:474c::/32 | 4.3B × /64 | LACNIC | BR | 4th Dec 2017 |
| 2804:4770::/32 | 4.3B × /64 | LACNIC | BR | 7th Dec 2017 |
| 2804:4780::/32 | 4.3B × /64 | LACNIC | BR | 7th Dec 2017 |
| 2804:479c::/32 | 4.3B × /64 | LACNIC | BR | 8th Dec 2017 |
| 2804:47ac::/32 | 4.3B × /64 | LACNIC | BR | 11th Dec 2017 |
| 2804:4834::/32 | 4.3B × /64 | LACNIC | BR | 22nd Dec 2017 |
| 2804:4840::/32 | 4.3B × /64 | LACNIC | BR | 22nd Dec 2017 |
| 2804:488::/32 | 4.3B × /64 | LACNIC | BR | 15th Apr 2011 |
| 2804:48bc::/32 | 4.3B × /64 | LACNIC | BR | 12th Jan 2018 |
| 2804:493c::/32 | 4.3B × /64 | LACNIC | BR | 29th Jan 2018 |
| 2804:4940::/32 | 4.3B × /64 | LACNIC | BR | 29th Jan 2018 |