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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2804:4578::/32 | 4.3B × /64 | LACNIC |  BR | 18th Oct 2017 |
| 2804:4598::/32 | 4.3B × /64 | LACNIC | BR | 20th 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 |
| 2804:476c::/32 | 4.3B × /64 | LACNIC | BR | 6th 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 |
| 2804:4834::/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 |
| 2804:48c4::/32 | 4.3B × /64 | LACNIC | BR | 12th Jan 2018 |
| 2804:48e4::/32 | 4.3B × /64 | LACNIC | BR | 17th Jan 2018 |
| 2804:493c::/32 | 4.3B × /64 | LACNIC | BR | 29th Jan 2018 |
| 2804:4940::/32 | 4.3B × /64 | LACNIC | BR | 29th Jan 2018 |
| 2804:494c::/32 | 4.3B × /64 | LACNIC | BR | 31st Jan 2018 |
| 2804:4958::/32 | 4.3B × /64 | LACNIC | BR | 2nd Feb 2018 |
| 2804:49bc::/32 | 4.3B × /64 | LACNIC | BR | 15th Feb 2018 |
| 2804:49d8::/32 | 4.3B × /64 | LACNIC | BR | 16th Feb 2018 |
| 2804:49f8::/32 | 4.3B × /64 | LACNIC | BR | 19th Feb 2018 |
| 2804:4a3c::/32 | 4.3B × /64 | LACNIC | BR | 23rd Feb 2018 |
| 2804:4a44::/32 | 4.3B × /64 | LACNIC | BR | 23rd Feb 2018 |
| 2804:4a74::/32 | 4.3B × /64 | LACNIC | BR | 1st Mar 2018 |
| 2804:4a98::/32 | 4.3B × /64 | LACNIC | BR | 6th Mar 2018 |
| 2804:4a9c::/32 | 4.3B × /64 | LACNIC | BR | 6th Mar 2018 |
| 2804:4b24::/32 | 4.3B × /64 | LACNIC | BR | 15th Mar 2018 |
| 2804:4b3c::/32 | 4.3B × /64 | LACNIC | BR | 19th Mar 2018 |
| 2804:4b50::/32 | 4.3B × /64 | LACNIC | BR | 20th Mar 2018 |
| 2804:4b6c::/32 | 4.3B × /64 | LACNIC | BR | 21st Mar 2018 |
| 2804:4b74::/32 | 4.3B × /64 | LACNIC | BR | 21st Mar 2018 |
| 2804:4b80::/32 | 4.3B × /64 | LACNIC | BR | 22nd Mar 2018 |
| 2804:4bd4::/32 | 4.3B × /64 | LACNIC | BR | 29th Mar 2018 |
| 2804:4c3c::/32 | 4.3B × /64 | LACNIC | BR | 5th Apr 2018 |
| 2804:4c5c::/32 | 4.3B × /64 | LACNIC | BR | 6th Apr 2018 |
| 2804:4c94::/32 | 4.3B × /64 | LACNIC | BR | 10th Apr 2018 |
| 2804:4ca4::/32 | 4.3B × /64 | LACNIC | BR | 11th Apr 2018 |
| 2804:4cc8::/32 | 4.3B × /64 | LACNIC | BR | 11th Apr 2018 |
| 2804:4cf4::/32 | 4.3B × /64 | LACNIC | BR | 16th Apr 2018 |
| 2804:4d2c::/32 | 4.3B × /64 | LACNIC | BR | 20th Apr 2018 |
| 2804:4d9c::/32 | 4.3B × /64 | LACNIC | BR | 7th May 2018 |