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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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 unannounced space registered through RIPE NCC, largest first.

Unannounced blocks in Czechia

299 blocks match, ordered by prefix.

Allocated but unannounced blocks, 151 to 200 of 299
PrefixAddressesRegistryCountryAllocated
2a02:52c0::/324.3B × /64RIPE NCCCZ29th Jul 2015
2a02:53c0::/324.3B × /64RIPE NCCCZ19th Sept 2012
2a02:5e80::/324.3B × /64RIPE NCCCZ18th Jul 2011
2a03:3760::/324.3B × /64RIPE NCCCZ23rd Sept 2014
2a03:3ae0::/2934.4B × /64RIPE NCCCZ1st Oct 2014
2a03:4e60::/324.3B × /64RIPE NCCCZ4th Nov 2014
2a03:76e0::/324.3B × /64RIPE NCCCZ3rd Feb 2015
2a03:7ba0::/324.3B × /64RIPE NCCCZ12th Feb 2015
2a03:8da0::/324.3B × /64RIPE NCCCZ20th Mar 2015
2a03:9200::/324.3B × /64RIPE NCCCZ27th Mar 2015
2a03:f240::/324.3B × /64RIPE NCCCZ9th Apr 2015
2a04:77c0::/2934.4B × /64RIPE NCCCZ23rd Oct 2013
2a04:c3c0::/2934.4B × /64RIPE NCCCZ25th Mar 2014
2a04:e1c0::/318.6B × /64RIPE NCCCZ2nd Dec 2025
2a05:2c20::/3017.2B × /64RIPE NCCCZ1st Oct 2014
2a05:4d00::/2934.4B × /64RIPE NCCCZ27th Oct 2014
2a05:500::/2934.4B × /64RIPE NCCCZ4th Aug 2014
2a05:5fc0::/2934.4B × /64RIPE NCCCZ13th Nov 2014
2a05:95c0::/2934.4B × /64RIPE NCCCZ16th Oct 2018
2a05:ebc0::/2934.4B × /64RIPE NCCCZ12th Mar 2015
2a05:ec00::/2934.4B × /64RIPE NCCCZ12th Mar 2015
2a06:1240::/2934.4B × /64RIPE NCCCZ7th May 2015
2a06:3740::/2934.4B × /64RIPE NCCCZ19th Jun 2015
2a06:400::/2934.4B × /64RIPE NCCCZ21st Apr 2015
2a06:4d00::/324.3B × /64RIPE NCCCZ19th May 2025
2a06:4d40::/2934.4B × /64RIPE NCCCZ27th Aug 2025
2a06:7640::/2934.4B × /64RIPE NCCCZ31st Aug 2015
2a06:bac0::/2934.4B × /64RIPE NCCCZ9th Nov 2015
2a06:d540::/2934.4B × /64RIPE NCCCZ3rd Dec 2015
2a06:e3c0::/2934.4B × /64RIPE NCCCZ23rd Dec 2015
2a06:f540::/2934.4B × /64RIPE NCCCZ22nd Jan 2016
2a07:11c0::/2934.4B × /64RIPE NCCCZ16th Feb 2016
2a07:30c0::/2934.4B × /64RIPE NCCCZ10th Mar 2016
2a07:7380::/2934.4B × /64RIPE NCCCZ6th May 2016
2a07:e4c0::/2934.4B × /64RIPE NCCCZ4th Jul 2018
2a09:4240::/324.3B × /64RIPE NCCCZ4th Feb 2019
2a09:9a40::/2934.4B × /64RIPE NCCCZ27th Feb 2019
2a09:b000::/2934.4B × /64RIPE NCCCZ16th Aug 2023
2a09:cf80::/2934.4B × /64RIPE NCCCZ21st Dec 2018
2a09:d880::/2934.4B × /64RIPE NCCCZ21st Dec 2018
2a09:e100::/2934.4B × /64RIPE NCCCZ23rd Nov 2018
2a09:e80::/2934.4B × /64RIPE NCCCZ27th Nov 2018
2a09:f040::/2934.4B × /64RIPE NCCCZ25th Mar 2019
2a09:fac0::/324.3B × /64RIPE NCCCZ27th Mar 2019
2a09:fc00::/2934.4B × /64RIPE NCCCZ6th Nov 2018
2a0a:940::/2934.4B × /64RIPE NCCCZ16th Feb 2017
2a0a:9680::/2934.4B × /64RIPE NCCCZ1st Dec 2016
2a0a:ae40::/2934.4B × /64RIPE NCCCZ21st Apr 2017
2a0a:bdc0::/2934.4B × /64RIPE NCCCZ28th Apr 2017
2a0a:cc00::/2934.4B × /64RIPE NCCCZ18th Aug 2016