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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 1501 to 1550 of 2663
PrefixAddressesRegistryCountryAllocated
2a01:150::/324.3B × /64RIPE NCCGB10th Jul 2006
2a01:1a8::/324.3B × /64RIPE NCCGB14th Aug 2006
2a01:428::/324.3B × /64RIPE NCCGB9th Aug 2007
2a01:4300::/324.3B × /64RIPE NCCGB24th Feb 2011
2a01:46e0::/324.3B × /64RIPE NCCGB29th Oct 2013
2a01:4760::/2934.4B × /64RIPE NCCGB30th Oct 2013
2a01:50::/324.3B × /64RIPE NCCGB27th Feb 2006
2a01:5180::/324.3B × /64RIPE NCCGB9th Jun 2011
2a01:530::/2934.4B × /64RIPE NCCGB4th May 2010
2a01:56a0::/324.3B × /64RIPE NCCGB22nd Nov 2013
2a01:5820::/324.3B × /64RIPE NCCGB19th Jun 2015
2a01:59c0::/324.3B × /64RIPE NCCGB7th Jun 2012
2a01:5a0::/324.3B × /64RIPE NCCGB2nd Nov 2007
2a01:5b00::/324.3B × /64RIPE NCCGB21st Mar 2016
2a01:5b60::/324.3B × /64RIPE NCCGB27th Nov 2013
2a01:5ba0::/324.3B × /64RIPE NCCGB27th Nov 2013
2a01:5c20::/324.3B × /64RIPE NCCGB27th Nov 2013
2a01:5ce0::/324.3B × /64RIPE NCCGB29th Nov 2013
2a01:5de0::/324.3B × /64RIPE NCCGB29th Nov 2013
2a01:7280::/324.3B × /64RIPE NCCGB20th Jun 2011
2a01:738::/324.3B × /64RIPE NCCGB10th Jan 2008
2a01:74a0::/324.3B × /64RIPE NCCGB3rd Jan 2014
2a01:7740::/2934.4B × /64RIPE NCCGB26th Jun 2012
2a01:78c0::/324.3B × /64RIPE NCCGB28th Jun 2012
2a01:7940::/324.3B × /64RIPE NCCGB28th Jun 2012
2a01:7980::/324.3B × /64RIPE NCCGB21st Jun 2011
2a01:7fa0::/324.3B × /64RIPE NCCGB21st Jan 2014
2a01:7fc0::/324.3B × /64RIPE NCCGB4th Jul 2012
2a01:82e0::/324.3B × /64RIPE NCCGB24th Jan 2014
2a01:8560::/324.3B × /64RIPE NCCGB8th Jul 2015
2a01:86e0::/324.3B × /64RIPE NCCGB30th Jan 2014
2a01:8940::/324.3B × /64RIPE NCCGB12th Jul 2012
2a01:89e0::/324.3B × /64RIPE NCCGB4th Feb 2014
2a01:90c0::/2934.4B × /64RIPE NCCGB19th Jul 2012
2a01:940::/2934.4B × /64RIPE NCCGB1st Jun 2026
2a01:9740::/324.3B × /64RIPE NCCGB31st Jul 2012
2a01:9880::/324.3B × /64RIPE NCCGB28th Jun 2011
2a01:9be0::/324.3B × /64RIPE NCCGB25th Feb 2014
2a01:9e60::/324.3B × /64RIPE NCCGB27th Feb 2014
2a01:9e80::/324.3B × /64RIPE NCCGB30th Jun 2011
2a01:a140::/324.3B × /64RIPE NCCGB15th Jul 2015
2a01:a2c0::/324.3B × /64RIPE NCCGB16th Aug 2012
2a01:a5a0::/324.3B × /64RIPE NCCGB10th Mar 2014
2a01:a5c0::/324.3B × /64RIPE NCCGB17th Aug 2012
2a01:ae00::/324.3B × /64RIPE NCCGB2nd Feb 2011
2a01:b240::/324.3B × /64RIPE NCCGB31st Aug 2012
2a01:b280::/2934.4B × /64RIPE NCCGB5th Jul 2011
2a01:b2a0::/324.3B × /64RIPE NCCGB21st Mar 2014
2a01:b2c0::/324.3B × /64RIPE NCCGB31st Aug 2012
2a01:b660::/324.3B × /64RIPE NCCGB26th Mar 2014