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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2804:392c::/32 | 4.3B × /64 | LACNIC |  BR | 24th Jan 2017 |
| 2804:3958::/32 | 4.3B × /64 | LACNIC | BR | 30th Jan 2017 |
| 2804:39a4::/32 | 4.3B × /64 | LACNIC | BR | 20th Feb 2017 |
| 2804:39a8::/32 | 4.3B × /64 | LACNIC | BR | 21st Feb 2017 |
| 2804:39b8::/32 | 4.3B × /64 | LACNIC | BR | 22nd Feb 2017 |
| 2804:39cc::/32 | 4.3B × /64 | LACNIC | BR | 23rd Feb 2017 |
| 2804:39d0::/32 | 4.3B × /64 | LACNIC | BR | 24th Feb 2017 |
| 2804:39e4::/32 | 4.3B × /64 | LACNIC | BR | 24th Feb 2017 |
| 2804:3a10::/32 | 4.3B × /64 | LACNIC | BR | 2nd Mar 2017 |
| 2804:3a14::/32 | 4.3B × /64 | LACNIC | BR | 3rd Mar 2017 |
| 2804:3a24::/32 | 4.3B × /64 | LACNIC | BR | 3rd Mar 2017 |
| 2804:3a28::/32 | 4.3B × /64 | LACNIC | BR | 3rd Mar 2017 |
| 2804:3a2c::/32 | 4.3B × /64 | LACNIC | BR | 3rd Mar 2017 |
| 2804:3a68::/32 | 4.3B × /64 | LACNIC | BR | 13th Mar 2017 |
| 2804:3ac::/32 | 4.3B × /64 | LACNIC | BR | 4th Feb 2011 |
| 2804:3ad0::/32 | 4.3B × /64 | LACNIC | BR | 24th Mar 2017 |
| 2804:3b28::/32 | 4.3B × /64 | LACNIC | BR | 3rd Apr 2017 |
| 2804:3be8::/32 | 4.3B × /64 | LACNIC | BR | 18th Apr 2017 |
| 2804:3bec::/32 | 4.3B × /64 | LACNIC | BR | 18th Apr 2017 |
| 2804:3c04::/32 | 4.3B × /64 | LACNIC | BR | 19th Apr 2017 |
| 2804:3c08::/32 | 4.3B × /64 | LACNIC | BR | 19th Apr 2017 |
| 2804:3c14::/32 | 4.3B × /64 | LACNIC | BR | 20th Apr 2017 |
| 2804:3c28::/32 | 4.3B × /64 | LACNIC | BR | 24th Apr 2017 |
| 2804:3c2c::/32 | 4.3B × /64 | LACNIC | BR | 24th Apr 2017 |
| 2804:3c4::/32 | 4.3B × /64 | LACNIC | BR | 14th Feb 2011 |
| 2804:3c4c::/32 | 4.3B × /64 | LACNIC | BR | 24th Apr 2017 |
| 2804:3c5c::/32 | 4.3B × /64 | LACNIC | BR | 25th Apr 2017 |
| 2804:3c98::/32 | 4.3B × /64 | LACNIC | BR | 27th Apr 2017 |
| 2804:3cb4::/32 | 4.3B × /64 | LACNIC | BR | 27th Apr 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 |
| 2804:3ea0::/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 |
| 2804:3ec8::/32 | 4.3B × /64 | LACNIC | BR | 8th Jun 2017 |
| 2804:3ee4::/32 | 4.3B × /64 | LACNIC | BR | 12th Jun 2017 |
| 2804:3f04::/32 | 4.3B × /64 | LACNIC | BR | 13th Jun 2017 |
| 2804:3f70::/32 | 4.3B × /64 | LACNIC | BR | 26th Jun 2017 |
| 2804:3fcc::/32 | 4.3B × /64 | LACNIC | BR | 3rd Jul 2017 |
| 2804:3fe4::/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 |