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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
85,195 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a00:6f20::/32 | 4.3B × /64 | RIPE NCC | 11th Apr 2013 | |
| 2a00:6f40::/32 | 4.3B × /64 | RIPE NCC | 5th Jan 2012 | |
| 2a00:6f80::/29 | 34.4B × /64 | RIPE NCC | 5th May 2011 | |
| 2a00:7020::/32 | 4.3B × /64 | RIPE NCC | 11th Apr 2013 | |
| 2a00:7040::/32 | 4.3B × /64 | RIPE NCC | 6th Jan 2012 | |
| 2a00:7060::/32 | 4.3B × /64 | RIPE NCC | 11th Apr 2013 | |
| 2a00:7080::/32 | 4.3B × /64 | RIPE NCC | 6th May 2011 | |
| 2a00:70a0::/32 | 4.3B × /64 | RIPE NCC | 11th Apr 2013 | |
| 2a00:70e0::/32 | 4.3B × /64 | RIPE NCC | 12th Apr 2013 | |
| 2a00:7100::/32 | 4.3B × /64 | RIPE NCC | 11th Feb 2011 | |
| 2a00:7120::/32 | 4.3B × /64 | RIPE NCC | 12th Apr 2013 | |
| 2a00:71a0::/29 | 34.4B × /64 | RIPE NCC | 15th Apr 2013 | |
| 2a00:71c0::/32 | 4.3B × /64 | RIPE NCC | 9th Jan 2012 | |
| 2a00:71e0::/32 | 4.3B × /64 | RIPE NCC | 15th Apr 2013 | |
| 2a00:7220::/32 | 4.3B × /64 | RIPE NCC | 16th Apr 2013 | |
| 2a00:7260::/29 | 34.4B × /64 | RIPE NCC | 16th Apr 2013 | |
| 2a00:72a0::/32 | 4.3B × /64 | RIPE NCC | 16th Apr 2013 | |
| 2a00:72c0::/32 | 4.3B × /64 | RIPE NCC | 28th Apr 2015 | |
| 2a00:72e0::/32 | 4.3B × /64 | RIPE NCC | 16th Apr 2013 | |
| 2a00:7340::/32 | 4.3B × /64 | RIPE NCC | 11th Jan 2012 | |
| 2a00:7360::/32 | 4.3B × /64 | RIPE NCC | 16th Apr 2013 | |
| 2a00:73a0::/32 | 4.3B × /64 | RIPE NCC | 17th Apr 2013 | |
| 2a00:73c0::/32 | 4.3B × /64 | RIPE NCC | 12th Jan 2012 | |
| 2a00:73e0::/32 | 4.3B × /64 | RIPE NCC | 28th Apr 2015 | |
| 2a00:7400::/32 | 4.3B × /64 | RIPE NCC | 21st Dec 2010 | |
| 2a00:7480::/32 | 4.3B × /64 | RIPE NCC | 6th May 2011 | |
| 2a00:7500::/32 | 4.3B × /64 | RIPE NCC | 14th Feb 2011 | |
| 2a00:7520::/32 | 4.3B × /64 | RIPE NCC | 17th Apr 2013 | |
| 2a00:75c0::/32 | 4.3B × /64 | RIPE NCC | 13th Jan 2012 | |
| 2a00:7620::/32 | 4.3B × /64 | RIPE NCC | 19th Apr 2013 | |
| 2a00:7640::/32 | 4.3B × /64 | RIPE NCC | 16th Jan 2012 | |
| 2a00:7660::/29 | 34.4B × /64 | RIPE NCC | 19th Apr 2013 | |
| 2a00:7680::/32 | 4.3B × /64 | RIPE NCC | 8th May 2011 | |
| 2a00:76a0::/32 | 4.3B × /64 | RIPE NCC | 19th Apr 2013 | |
| 2a00:76c0::/29 | 34.4B × /64 | RIPE NCC | 16th Jan 2012 | |
| 2a00:76e0::/32 | 4.3B × /64 | RIPE NCC | 22nd Apr 2013 | |
| 2a00:7760::/29 | 34.4B × /64 | RIPE NCC | 22nd Apr 2013 | |
| 2a00:7780::/32 | 4.3B × /64 | RIPE NCC | 9th May 2011 | |
| 2a00:77c0::/32 | 4.3B × /64 | RIPE NCC | 18th Jan 2012 | |
| 2a00:7860::/32 | 4.3B × /64 | RIPE NCC | 23rd Apr 2013 | |
| 2a00:78a0::/32 | 4.3B × /64 | RIPE NCC | 23rd Apr 2013 | |
| 2a00:78e0::/29 | 34.4B × /64 | RIPE NCC | 23rd Apr 2013 | |
| 2a00:7900::/32 | 4.3B × /64 | RIPE NCC | 14th Feb 2011 | |
| 2a00:7960::/32 | 4.3B × /64 | RIPE NCC | 23rd Apr 2013 | |
| 2a00:79a0::/32 | 4.3B × /64 | RIPE NCC | 23rd Apr 2013 | |
| 2a00:7a00::/32 | 4.3B × /64 | RIPE NCC | 20th Jan 2011 | |
| 2a00:7ac0::/32 | 4.3B × /64 | RIPE NCC | 19th Jan 2012 | |
| 2a00:7ae0::/32 | 4.3B × /64 | RIPE NCC | 25th Apr 2013 | |
| 2a00:7b40::/32 | 4.3B × /64 | RIPE NCC | 19th Jan 2012 | |
| 2a00:7ba0::/32 | 4.3B × /64 | RIPE NCC | 25th Apr 2013 |