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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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:e4e0::/32 | 4.3B × /64 | RIPE NCC | 3rd Jun 2015 | |
| 2a00:e500::/32 | 4.3B × /64 | RIPE NCC | 21st Feb 2011 | |
| 2a00:e560::/32 | 4.3B × /64 | RIPE NCC | 18th Sept 2013 | |
| 2a00:e5a0::/32 | 4.3B × /64 | RIPE NCC | 18th Sept 2013 | |
| 2a00:e5c0::/32 | 4.3B × /64 | RIPE NCC | 25th Apr 2012 | |
| 2a00:e5e0::/32 | 4.3B × /64 | RIPE NCC | 18th Sept 2013 | |
| 2a00:e620::/32 | 4.3B × /64 | RIPE NCC | 19th Sept 2013 | |
| 2a00:e640::/29 | 34.4B × /64 | RIPE NCC | 25th Apr 2012 | |
| 2a00:e680::/32 | 4.3B × /64 | RIPE NCC | 30th May 2011 | |
| 2a00:e6e0::/32 | 4.3B × /64 | RIPE NCC | 20th Sept 2013 | |
| 2a00:e70::/32 | 4.3B × /64 | RIPE NCC | 12th Nov 2008 | |
| 2a00:e7c0::/32 | 4.3B × /64 | RIPE NCC | 27th Apr 2012 | |
| 2a00:e7e0::/32 | 4.3B × /64 | RIPE NCC | 23rd Sept 2013 | |
| 2a00:e80::/32 | 4.3B × /64 | RIPE NCC | 13th Nov 2008 | |
| 2a00:e840::/32 | 4.3B × /64 | RIPE NCC | 27th Apr 2012 | |
| 2a00:e880::/32 | 4.3B × /64 | RIPE NCC | 31st May 2011 | |
| 2a00:e8a0::/32 | 4.3B × /64 | RIPE NCC | 23rd Sept 2013 | |
| 2a00:e940::/32 | 4.3B × /64 | RIPE NCC | 27th Apr 2012 | |
| 2a00:e960::/32 | 4.3B × /64 | RIPE NCC | 24th Sept 2013 | |
| 2a00:e980::/32 | 4.3B × /64 | RIPE NCC | 31st May 2011 | |
| 2a00:ea00::/32 | 4.3B × /64 | RIPE NCC | 27th Jan 2011 | |
| 2a00:eaa0::/32 | 4.3B × /64 | RIPE NCC | 24th Sept 2013 | |
| 2a00:eac0::/32 | 4.3B × /64 | RIPE NCC | 1st May 2012 | |
| 2a00:eae0::/29 | 34.4B × /64 | RIPE NCC | 25th Sept 2013 | |
| 2a00:eb00::/32 | 4.3B × /64 | RIPE NCC | 22nd Feb 2011 | |
| 2a00:eb40::/32 | 4.3B × /64 | RIPE NCC | 1st May 2012 | |
| 2a00:eba::/31 | 8.6B × /64 | RIPE NCC | 19th Feb 2010 | |
| 2a00:ebc::/30 | 17.2B × /64 | RIPE NCC | 19th Feb 2010 | |
| 2a00:ebe0::/29 | 34.4B × /64 | RIPE NCC | 26th Sept 2013 | |
| 2a00:ed60::/32 | 4.3B × /64 | RIPE NCC | 27th Sept 2013 | |
| 2a00:ede0::/29 | 34.4B × /64 | RIPE NCC | 27th Sept 2013 | |
| 2a00:ee20::/32 | 4.3B × /64 | RIPE NCC | 27th Sept 2013 | |
| 2a00:ee40::/32 | 4.3B × /64 | RIPE NCC | 2nd May 2012 | |
| 2a00:ee60::/32 | 4.3B × /64 | RIPE NCC | 27th Sept 2013 | |
| 2a00:ee80::/32 | 4.3B × /64 | RIPE NCC | 5th Jun 2015 | |
| 2a00:ee8::/32 | 4.3B × /64 | RIPE NCC | 20th Nov 2008 | |
| 2a00:eea0::/29 | 34.4B × /64 | RIPE NCC | 30th Sept 2013 | |
| 2a00:eee0::/32 | 4.3B × /64 | RIPE NCC | 30th Sept 2013 | |
| 2a00:ef00::/32 | 4.3B × /64 | RIPE NCC | 12th Jan 2016 | |
| 2a00:ef80::/32 | 4.3B × /64 | RIPE NCC | 31st May 2011 | |
| 2a00:f000::/32 | 4.3B × /64 | RIPE NCC | 3rd Dec 2010 | |
| 2a00:f040::/32 | 4.3B × /64 | RIPE NCC | 2nd May 2012 | |
| 2a00:f0a0::/29 | 34.4B × /64 | RIPE NCC | 1st Oct 2013 | |
| 2a00:f0c0::/32 | 4.3B × /64 | RIPE NCC | 2nd May 2012 | |
| 2a00:f100::/32 | 4.3B × /64 | RIPE NCC | 23rd Feb 2011 | |
| 2a00:f160::/32 | 4.3B × /64 | RIPE NCC | 2nd Oct 2013 | |
| 2a00:f200::/32 | 4.3B × /64 | RIPE NCC | 27th Jan 2011 | |
| 2a00:f20::/32 | 4.3B × /64 | RIPE NCC | 25th Nov 2008 | |
| 2a00:f240::/29 | 34.4B × /64 | RIPE NCC | 5th Jun 2015 | |
| 2a00:f260::/32 | 4.3B × /64 | RIPE NCC | 3rd Oct 2013 |