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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,124 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a03:49c0::/32 | 4.3B × /64 | RIPE NCC | 6th Nov 2012 | |
| 2a03:49e0::/32 | 4.3B × /64 | RIPE NCC | 24th Oct 2014 | |
| 2a03:4a00::/32 | 4.3B × /64 | RIPE NCC | 8th Sept 2015 | |
| 2a03:4a20::/32 | 4.3B × /64 | RIPE NCC | 27th Oct 2014 | |
| 2a03:4a60::/32 | 4.3B × /64 | RIPE NCC | 27th Oct 2014 | |
| 2a03:4ac0::/32 | 4.3B × /64 | RIPE NCC | 7th Nov 2012 | |
| 2a03:4c60::/32 | 4.3B × /64 | RIPE NCC | 30th Oct 2014 | |
| 2a03:4c80::/32 | 4.3B × /64 | RIPE NCC | 8th Sept 2011 | |
| 2a03:4ce0::/32 | 4.3B × /64 | RIPE NCC | 31st Oct 2014 | |
| 2a03:4d00::/32 | 4.3B × /64 | RIPE NCC | 4th Apr 2011 | |
| 2a03:4d60::/32 | 4.3B × /64 | RIPE NCC | 31st Oct 2014 | |
| 2a03:4d80::/32 | 4.3B × /64 | RIPE NCC | 8th Sept 2011 | |
| 2a03:4dc0::/32 | 4.3B × /64 | RIPE NCC | 8th Nov 2012 | |
| 2a03:4e00::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2011 | |
| 2a03:4e20::/32 | 4.3B × /64 | RIPE NCC | 3rd Nov 2014 | |
| 2a03:4e60::/32 | 4.3B × /64 | RIPE NCC | 4th Nov 2014 | |
| 2a03:4e80::/32 | 4.3B × /64 | RIPE NCC | 12th Sept 2011 | |
| 2a03:4ea0::/32 | 4.3B × /64 | RIPE NCC | 5th Nov 2014 | |
| 2a03:4ec0::/32 | 4.3B × /64 | RIPE NCC | 8th Nov 2012 | |
| 2a03:4ee0::/32 | 4.3B × /64 | RIPE NCC | 6th Nov 2014 | |
| 2a03:4f60::/32 | 4.3B × /64 | RIPE NCC | 6th Nov 2014 | |
| 2a03:4fc0::/32 | 4.3B × /64 | RIPE NCC | 13th May 2015 | |
| 2a03:4fe0::/32 | 4.3B × /64 | RIPE NCC | 10th Sept 2015 | |
| 2a03:500::/32 | 4.3B × /64 | RIPE NCC | 24th Mar 2011 | |
| 2a03:5020::/32 | 4.3B × /64 | RIPE NCC | 10th Nov 2014 | |
| 2a03:5040::/29 | 34.4B × /64 | RIPE NCC | 9th Nov 2012 | |
| 2a03:5060::/32 | 4.3B × /64 | RIPE NCC | 10th Nov 2014 | |
| 2a03:5140::/32 | 4.3B × /64 | RIPE NCC | 9th Nov 2012 | |
| 2a03:5160::/32 | 4.3B × /64 | RIPE NCC | 12th Nov 2014 | |
| 2a03:51c0::/29 | 34.4B × /64 | RIPE NCC | 9th Nov 2012 | |
| 2a03:5200::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2011 | |
| 2a03:5220::/32 | 4.3B × /64 | RIPE NCC | 17th Nov 2014 | |
| 2a03:5280::/32 | 4.3B × /64 | RIPE NCC | 13th Sept 2011 | |
| 2a03:52c0::/32 | 4.3B × /64 | RIPE NCC | 12th Nov 2012 | |
| 2a03:5300::/29 | 34.4B × /64 | RIPE NCC | 4th Apr 2011 | |
| 2a03:5360::/32 | 4.3B × /64 | RIPE NCC | 17th Nov 2014 | |
| 2a03:5460::/32 | 4.3B × /64 | RIPE NCC | 18th Nov 2014 | |
| 2a03:54a0::/32 | 4.3B × /64 | RIPE NCC | 15th Sept 2015 | |
| 2a03:54c0::/32 | 4.3B × /64 | RIPE NCC | 12th Nov 2012 | |
| 2a03:54e0::/32 | 4.3B × /64 | RIPE NCC | 18th Nov 2014 | |
| 2a03:5520::/32 | 4.3B × /64 | RIPE NCC | 18th Nov 2014 | |
| 2a03:5560::/32 | 4.3B × /64 | RIPE NCC | 18th Nov 2014 | |
| 2a03:5580::/29 | 34.4B × /64 | RIPE NCC | 14th Sept 2011 | |
| 2a03:55e0::/32 | 4.3B × /64 | RIPE NCC | 16th Sept 2015 | |
| 2a03:5600::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2011 | |
| 2a03:5660::/32 | 4.3B × /64 | RIPE NCC | 16th Sept 2015 | |
| 2a03:56c0::/32 | 4.3B × /64 | RIPE NCC | 12th Nov 2012 | |
| 2a03:5720::/32 | 4.3B × /64 | RIPE NCC | 20th Nov 2014 | |
| 2a03:5760::/32 | 4.3B × /64 | RIPE NCC | 20th Nov 2014 | |
| 2a03:57a0::/32 | 4.3B × /64 | RIPE NCC | 21st Nov 2014 |