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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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
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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 |
|---|---|---|---|---|
| 2a01:822::/31 | 8.6B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8240::/32 | 4.3B × /64 | RIPE NCC | 6th Jul 2012 | |
| 2a01:824::/31 | 8.6B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8260::/32 | 4.3B × /64 | RIPE NCC | 22nd Jan 2014 | |
| 2a01:826::/32 | 4.3B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:828::/29 | 34.4B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:82a0::/32 | 4.3B × /64 | RIPE NCC | 24th Jan 2014 | |
| 2a01:82e0::/32 | 4.3B × /64 | RIPE NCC | 24th Jan 2014 | |
| 2a01:8360::/32 | 4.3B × /64 | RIPE NCC | 27th Jan 2014 | |
| 2a01:83c0::/32 | 4.3B × /64 | RIPE NCC | 6th Jul 2012 | |
| 2a01:8420::/32 | 4.3B × /64 | RIPE NCC | 28th Jan 2014 | |
| 2a01:8440::/32 | 4.3B × /64 | RIPE NCC | 10th Jul 2012 | |
| 2a01:84c0::/32 | 4.3B × /64 | RIPE NCC | 10th Jul 2012 | |
| 2a01:84e0::/32 | 4.3B × /64 | RIPE NCC | 28th Jan 2014 | |
| 2a01:8500::/32 | 4.3B × /64 | RIPE NCC | 4th Mar 2011 | |
| 2a01:8520::/32 | 4.3B × /64 | RIPE NCC | 28th Jan 2014 | |
| 2a01:8560::/32 | 4.3B × /64 | RIPE NCC | 8th Jul 2015 | |
| 2a01:85e0::/32 | 4.3B × /64 | RIPE NCC | 29th Jan 2014 | |
| 2a01:8680::/32 | 4.3B × /64 | RIPE NCC | 23rd Jun 2011 | |
| 2a01:86a0::/32 | 4.3B × /64 | RIPE NCC | 30th Jan 2014 | |
| 2a01:86c0::/32 | 4.3B × /64 | RIPE NCC | 11th Jul 2012 | |
| 2a01:86e0::/32 | 4.3B × /64 | RIPE NCC | 30th Jan 2014 | |
| 2a01:8700::/32 | 4.3B × /64 | RIPE NCC | 4th Mar 2011 | |
| 2a01:8720::/32 | 4.3B × /64 | RIPE NCC | 31st Jan 2014 | |
| 2a01:8780::/29 | 34.4B × /64 | RIPE NCC | 23rd Jun 2011 | |
| 2a01:87e0::/32 | 4.3B × /64 | RIPE NCC | 31st Jan 2014 | |
| 2a01:880::/26 | 275B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8820::/29 | 34.4B × /64 | RIPE NCC | 10th Jul 2015 | |
| 2a01:8860::/32 | 4.3B × /64 | RIPE NCC | 3rd Feb 2014 | |
| 2a01:88a0::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2014 | |
| 2a01:8920::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2014 | |
| 2a01:8940::/32 | 4.3B × /64 | RIPE NCC | 12th Jul 2012 | |
| 2a01:89e0::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2014 | |
| 2a01:8a00::/32 | 4.3B × /64 | RIPE NCC | 1st Feb 2011 | |
| 2a01:8a20::/32 | 4.3B × /64 | RIPE NCC | 4th Feb 2014 | |
| 2a01:8ac0::/32 | 4.3B × /64 | RIPE NCC | 13th Jul 2012 | |
| 2a01:8ae0::/32 | 4.3B × /64 | RIPE NCC | 5th Feb 2014 | |
| 2a01:8b20::/29 | 34.4B × /64 | RIPE NCC | 5th Feb 2014 | |
| 2a01:8b60::/32 | 4.3B × /64 | RIPE NCC | 5th Feb 2014 | |
| 2a01:8ba0::/29 | 34.4B × /64 | RIPE NCC | 5th Feb 2014 | |
| 2a01:8c0::/32 | 4.3B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8c1::/32 | 4.3B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8c2::/31 | 8.6B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8c4::/30 | 17.2B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8c60::/32 | 4.3B × /64 | RIPE NCC | 6th Feb 2014 | |
| 2a01:8ce0::/32 | 4.3B × /64 | RIPE NCC | 6th Feb 2014 | |
| 2a01:8d1::/32 | 4.3B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8d2::/31 | 8.6B × /64 | RIPE NCC | 12th Apr 2006 | |
| 2a01:8d40::/29 | 34.4B × /64 | RIPE NCC | 16th Jul 2012 | |
| 2a01:8d4::/30 | 17.2B × /64 | RIPE NCC | 12th Apr 2006 |