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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 in Spain
907 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 2a00:c420::/32 | 4.3B × /64 | RIPE NCC |  ES | 2nd Aug 2013 |
| 2a00:ce00::/32 | 4.3B × /64 | RIPE NCC | ES | 26th Jan 2011 |
| 2a00:d080::/32 | 4.3B × /64 | RIPE NCC | ES | 26th May 2011 |
| 2a00:d280::/32 | 4.3B × /64 | RIPE NCC | ES | 26th May 2011 |
| 2a00:d9e0::/32 | 4.3B × /64 | RIPE NCC | ES | 28th May 2015 |
| 2a00:db40::/32 | 4.3B × /64 | RIPE NCC | ES | 13th Apr 2012 |
| 2a00:dbe0::/32 | 4.3B × /64 | RIPE NCC | ES | 6th Sept 2013 |
| 2a00:dc80::/29 | 34.4B × /64 | RIPE NCC | ES | 30th May 2011 |
| 2a00:e160::/32 | 4.3B × /64 | RIPE NCC | ES | 16th Sept 2013 |
| 2a00:e1e0::/32 | 4.3B × /64 | RIPE NCC | ES | 16th Sept 2013 |
| 2a00:e70::/32 | 4.3B × /64 | RIPE NCC | ES | 12th Nov 2008 |
| 2a00:f380::/32 | 4.3B × /64 | RIPE NCC | ES | 1st Jun 2011 |
| 2a00:f640::/29 | 34.4B × /64 | RIPE NCC | ES | 9th May 2012 |
| 2a00:fe40::/32 | 4.3B × /64 | RIPE NCC | ES | 16th May 2012 |
| 2a01:1a0::/29 | 34.4B × /64 | RIPE NCC | ES | 11th Aug 2006 |
| 2a01:4100::/32 | 4.3B × /64 | RIPE NCC | ES | 15th Jun 2015 |
| 2a01:4140::/32 | 4.3B × /64 | RIPE NCC | ES | 17th Jun 2015 |
| 2a01:48::/32 | 4.3B × /64 | RIPE NCC | ES | 24th Feb 2006 |
| 2a01:48e0::/32 | 4.3B × /64 | RIPE NCC | ES | 31st Oct 2013 |
| 2a01:4e40::/32 | 4.3B × /64 | RIPE NCC | ES | 29th Apr 2025 |
| 2a01:5280::/32 | 4.3B × /64 | RIPE NCC | ES | 9th Jun 2011 |
| 2a01:5780::/32 | 4.3B × /64 | RIPE NCC | ES | 10th Jun 2011 |
| 2a01:5b20::/32 | 4.3B × /64 | RIPE NCC | ES | 27th Nov 2013 |
| 2a01:5fe0::/32 | 4.3B × /64 | RIPE NCC | ES | 3rd Dec 2013 |
| 2a01:6040::/32 | 4.3B × /64 | RIPE NCC | ES | 11th Jun 2012 |
| 2a01:6840::/32 | 4.3B × /64 | RIPE NCC | ES | 15th Jun 2012 |
| 2a01:68a0::/32 | 4.3B × /64 | RIPE NCC | ES | 23rd Jun 2015 |
| 2a01:6900::/32 | 4.3B × /64 | RIPE NCC | ES | 2nd Mar 2011 |
| 2a01:6fa0::/32 | 4.3B × /64 | RIPE NCC | ES | 20th Dec 2013 |
| 2a01:72e0::/32 | 4.3B × /64 | RIPE NCC | ES | 27th Dec 2013 |
| 2a01:7560::/32 | 4.3B × /64 | RIPE NCC | ES | 2nd Jun 2016 |
| 2a01:7580::/32 | 4.3B × /64 | RIPE NCC | ES | 20th Jun 2011 |
| 2a01:770::/32 | 4.3B × /64 | RIPE NCC | ES | 18th Jan 2008 |
| 2a01:7880::/32 | 4.3B × /64 | RIPE NCC | ES | 3rd Jul 2015 |
| 2a01:86c0::/32 | 4.3B × /64 | RIPE NCC | ES | 11th Jul 2012 |
| 2a01:88a0::/32 | 4.3B × /64 | RIPE NCC | ES | 4th Feb 2014 |
| 2a01:8c0::/32 | 4.3B × /64 | RIPE NCC | ES | 12th Apr 2006 |
| 2a01:8da0::/32 | 4.3B × /64 | RIPE NCC | ES | 6th Feb 2014 |
| 2a01:92a0::/32 | 4.3B × /64 | RIPE NCC | ES | 13th Feb 2014 |
| 2a01:9340::/32 | 4.3B × /64 | RIPE NCC | ES | 26th Jul 2012 |
| 2a01:98e0::/29 | 34.4B × /64 | RIPE NCC | ES | 20th Feb 2014 |
| 2a01:9f20::/32 | 4.3B × /64 | RIPE NCC | ES | 28th Feb 2014 |
| 2a01:a260::/32 | 4.3B × /64 | RIPE NCC | ES | 4th Mar 2014 |
| 2a01:a8a0::/32 | 4.3B × /64 | RIPE NCC | ES | 12th Mar 2014 |
| 2a01:aba0::/32 | 4.3B × /64 | RIPE NCC | ES | 14th Mar 2014 |
| 2a01:ad20::/32 | 4.3B × /64 | RIPE NCC | ES | 18th Mar 2014 |
| 2a01:b060::/32 | 4.3B × /64 | RIPE NCC | ES | 20th Mar 2014 |
| 2a01:b680::/32 | 4.3B × /64 | RIPE NCC | ES | 5th Jul 2011 |
| 2a01:b900::/32 | 4.3B × /64 | RIPE NCC | ES | 14th Mar 2011 |
| 2a01:e2c0::/32 | 4.3B × /64 | RIPE NCC | ES | 27th Sept 2024 |