subnet.im

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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 United Kingdom

2,663 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1601 to 1650 of 2663
PrefixAddressesRegistryCountryAllocated
2a02:71c0::/324.3B × /64RIPE NCCGB27th Sept 2012
2a02:7580::/324.3B × /64RIPE NCCGB1st Aug 2011
2a02:7700::/324.3B × /64RIPE NCCGB22nd Mar 2011
2a02:78e0::/324.3B × /64RIPE NCCGB18th Jun 2014
2a02:7f00::/324.3B × /64RIPE NCCGB23rd Mar 2011
2a02:8d0::/2934.4B × /64RIPE NCCGB19th Jan 2009
2a02:b00::/324.3B × /64RIPE NCCGB6th Mar 2009
2a02:c2c0::/2934.4B × /64RIPE NCCGB18th Sept 2012
2a02:ca8::/324.3B × /64RIPE NCCGB6th Apr 2009
2a02:d000::/2934.4B × /64RIPE NCCGB9th Oct 2012
2a02:d680::/3017.2B × /64RIPE NCCGB23rd Oct 2012
2a02:da40::/2934.4B × /64RIPE NCCGB30th Oct 2012
2a02:dd40::/2934.4B × /64RIPE NCCGB6th Nov 2012
2a02:e600::/3017.2B × /64RIPE NCCGB14th Jul 2015
2a02:e68::/324.3B × /64RIPE NCCGB12th May 2009
2a02:e6c0::/2934.4B × /64RIPE NCCGB26th Mar 2015
2a02:e8c0::/2934.4B × /64RIPE NCCGB26th Mar 2015
2a02:ea40::/2934.4B × /64RIPE NCCGB27th Nov 2012
2a02:eb0::/324.3B × /64RIPE NCCGB13th May 2009
2a02:eb40::/2934.4B × /64RIPE NCCGB29th Nov 2012
2a02:f0a0::/3017.2B × /64RIPE NCCGB11th Dec 2012
2a02:f100::/2934.4B × /64RIPE NCCGB6th Dec 2012
2a02:fe40::/2934.4B × /64RIPE NCCGB14th Jan 2013
2a02:fec0::/2934.4B × /64RIPE NCCGB15th Jan 2013
2a03:1120::/324.3B × /64RIPE NCCGB15th Jul 2014
2a03:15c0::/324.3B × /64RIPE NCCGB12th Oct 2012
2a03:1620::/324.3B × /64RIPE NCCGB23rd Jul 2014
2a03:1760::/324.3B × /64RIPE NCCGB24th Jul 2014
2a03:17a0::/324.3B × /64RIPE NCCGB24th Jul 2014
2a03:1940::/324.3B × /64RIPE NCCGB12th Oct 2012
2a03:1b60::/324.3B × /64RIPE NCCGB29th Jul 2014
2a03:1be0::/324.3B × /64RIPE NCCGB29th Jul 2014
2a03:1ea0::/2934.4B × /64RIPE NCCGB4th Aug 2014
2a03:1f20::/324.3B × /64RIPE NCCGB4th Aug 2014
2a03:2000::/324.3B × /64RIPE NCCGB2nd Dec 2010
2a03:20a0::/324.3B × /64RIPE NCCGB7th Aug 2014
2a03:21a0::/324.3B × /64RIPE NCCGB7th Aug 2014
2a03:2580::/324.3B × /64RIPE NCCGB19th Aug 2011
2a03:2d00::/324.3B × /64RIPE NCCGB29th Mar 2011
2a03:2e40::/324.3B × /64RIPE NCCGB25th Oct 2012
2a03:3020::/324.3B × /64RIPE NCCGB8th Sept 2014
2a03:31a0::/324.3B × /64RIPE NCCGB9th Sept 2014
2a03:33c0::/324.3B × /64RIPE NCCGB26th Oct 2012
2a03:340::/324.3B × /64RIPE NCCGB7th Apr 2026
2a03:3640::/324.3B × /64RIPE NCCGB26th Oct 2012
2a03:36e0::/324.3B × /64RIPE NCCGB17th Sept 2014
2a03:3ea0::/324.3B × /64RIPE NCCGB6th Oct 2014
2a03:4160::/324.3B × /64RIPE NCCGB13th Oct 2014
2a03:4640::/324.3B × /64RIPE NCCGB5th Nov 2012
2a03:480::/324.3B × /64RIPE NCCGB5th Aug 2011