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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 |
|---|---|---|---|---|
| 2a00:ae60::/32 | 4.3B × /64 | RIPE NCC | 4th Jul 2013 | |
| 2a00:ae80::/32 | 4.3B × /64 | RIPE NCC | 19th May 2011 | |
| 2a00:af00::/32 | 4.3B × /64 | RIPE NCC | 17th Feb 2011 | |
| 2a00:af40::/32 | 4.3B × /64 | RIPE NCC | 1st Mar 2012 | |
| 2a00:af60::/32 | 4.3B × /64 | RIPE NCC | 4th Jul 2013 | |
| 2a00:af80::/32 | 4.3B × /64 | RIPE NCC | 19th May 2011 | |
| 2a00:afa0::/32 | 4.3B × /64 | RIPE NCC | 4th Jul 2013 | |
| 2a00:b020::/32 | 4.3B × /64 | RIPE NCC | 8th Jul 2013 | |
| 2a00:b040::/32 | 4.3B × /64 | RIPE NCC | 2nd Mar 2012 | |
| 2a00:b080::/32 | 4.3B × /64 | RIPE NCC | 20th May 2011 | |
| 2a00:b0c0::/32 | 4.3B × /64 | RIPE NCC | 2nd Mar 2012 | |
| 2a00:b120::/32 | 4.3B × /64 | RIPE NCC | 8th Jul 2013 | |
| 2a00:b1a0::/32 | 4.3B × /64 | RIPE NCC | 9th Jul 2013 | |
| 2a00:b1c0::/32 | 4.3B × /64 | RIPE NCC | 5th Mar 2012 | |
| 2a00:b200::/32 | 4.3B × /64 | RIPE NCC | 25th Jan 2011 | |
| 2a00:b2c0::/32 | 4.3B × /64 | RIPE NCC | 20th May 2015 | |
| 2a00:b2e0::/32 | 4.3B × /64 | RIPE NCC | 10th Jul 2013 | |
| 2a00:b320::/32 | 4.3B × /64 | RIPE NCC | 10th Jul 2013 | |
| 2a00:b380::/32 | 4.3B × /64 | RIPE NCC | 20th May 2011 | |
| 2a00:b3c0::/32 | 4.3B × /64 | RIPE NCC | 6th Mar 2012 | |
| 2a00:b480::/32 | 4.3B × /64 | RIPE NCC | 20th May 2011 | |
| 2a00:b560::/32 | 4.3B × /64 | RIPE NCC | 15th Jul 2013 | |
| 2a00:b5a0::/32 | 4.3B × /64 | RIPE NCC | 16th Jul 2013 | |
| 2a00:b5e0::/32 | 4.3B × /64 | RIPE NCC | 16th Jul 2013 | |
| 2a00:b600::/29 | 34.4B × /64 | RIPE NCC | 25th Jan 2011 | |
| 2a00:b660::/32 | 4.3B × /64 | RIPE NCC | 16th Jul 2013 | |
| 2a00:b680::/32 | 4.3B × /64 | RIPE NCC | 23rd May 2011 | |
| 2a00:b6a0::/32 | 4.3B × /64 | RIPE NCC | 26th May 2015 | |
| 2a00:b720::/29 | 34.4B × /64 | RIPE NCC | 16th Jul 2013 | |
| 2a00:b760::/32 | 4.3B × /64 | RIPE NCC | 17th Jul 2013 | |
| 2a00:b780::/32 | 4.3B × /64 | RIPE NCC | 23rd May 2011 | |
| 2a00:b7a0::/32 | 4.3B × /64 | RIPE NCC | 17th Jul 2013 | |
| 2a00:b820::/32 | 4.3B × /64 | RIPE NCC | 18th Jul 2013 | |
| 2a00:b860::/32 | 4.3B × /64 | RIPE NCC | 18th Jul 2013 | |
| 2a00:b8a0::/32 | 4.3B × /64 | RIPE NCC | 18th Jul 2013 | |
| 2a00:b960::/32 | 4.3B × /64 | RIPE NCC | 19th Jul 2013 | |
| 2a00:b9e0::/32 | 4.3B × /64 | RIPE NCC | 19th Jul 2013 | |
| 2a00:ba00::/32 | 4.3B × /64 | RIPE NCC | 25th Jan 2011 | |
| 2a00:ba20::/32 | 4.3B × /64 | RIPE NCC | 22nd Jul 2013 | |
| 2a00:ba40::/32 | 4.3B × /64 | RIPE NCC | 12th Mar 2012 | |
| 2a00:baa0::/32 | 4.3B × /64 | RIPE NCC | 22nd Jul 2013 | |
| 2a00:bae0::/32 | 4.3B × /64 | RIPE NCC | 22nd Jul 2013 | |
| 2a00:bb20::/32 | 4.3B × /64 | RIPE NCC | 22nd Jul 2013 | |
| 2a00:bb60::/32 | 4.3B × /64 | RIPE NCC | 22nd Jul 2013 | |
| 2a00:bbc0::/32 | 4.3B × /64 | RIPE NCC | 13th Mar 2012 | |
| 2a00:bc60::/29 | 34.4B × /64 | RIPE NCC | 24th Jul 2013 | |
| 2a00:bcc0::/32 | 4.3B × /64 | RIPE NCC | 1st Jun 2016 | |
| 2a00:bce0::/29 | 34.4B × /64 | RIPE NCC | 24th Jul 2013 | |
| 2a00:bd40::/32 | 4.3B × /64 | RIPE NCC | 14th Mar 2012 | |
| 2a00:bd60::/32 | 4.3B × /64 | RIPE NCC | 24th Jul 2013 |