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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 101 to 150 of 299
PrefixAddressesRegistryCountryAllocated
2001:678:be0::/4865.5k × /64RIPE NCCCZ3rd Jan 2020
2001:67c:134c::/4865.5k × /64RIPE NCCCZ7th Feb 2013
2001:67c:17b4::/4865.5k × /64RIPE NCCCZ4th Jun 2013
2001:67c:17b8::/4865.5k × /64RIPE NCCCZ6th Jun 2013
2001:67c:17d0::/4865.5k × /64RIPE NCCCZ11th Jun 2013
2001:67c:19c4::/4865.5k × /64RIPE NCCCZ21st Jan 2014
2001:67c:216c::/4865.5k × /64RIPE NCCCZ24th Mar 2011
2001:67c:2194::/4865.5k × /64RIPE NCCCZ30th Mar 2011
2001:67c:22b4::/4865.5k × /64RIPE NCCCZ26th May 2011
2001:67c:2494::/4865.5k × /64RIPE NCCCZ23rd Sept 2011
2001:67c:2710::/4865.5k × /64RIPE NCCCZ20th Feb 2012
2001:67c:29d0::/4865.5k × /64RIPE NCCCZ6th Jun 2012
2001:67c:2b7c::/4865.5k × /64RIPE NCCCZ30th Jul 2018
2001:67c:454::/4865.5k × /64RIPE NCCCZ20th Feb 2014
2001:67c:658::/4865.5k × /64RIPE NCCCZ20th Jun 2014
2001:67c:8a8::/4865.5k × /64RIPE NCCCZ15th Oct 2021
2001:67c:aa8::/4865.5k × /64RIPE NCCCZ23rd Sept 2022
2001:67c:ab4::/4865.5k × /64RIPE NCCCZ23rd Sept 2022
2001:67c:ab8::/4865.5k × /64RIPE NCCCZ23rd Sept 2022
2001:7f8:130::/4865.5k × /64RIPE NCCCZ11th Nov 2024
2001:7f8:14::/4865.5k × /64RIPE NCCCZ3rd Feb 2003
2001:7f8:5e::/4865.5k × /64RIPE NCCCZ26th Nov 2010
2001:7f8:7f::/4865.5k × /64RIPE NCCCZ30th Oct 2013
2001:7f8:87::/4865.5k × /64RIPE NCCCZ30th Apr 2014
2001:7f8:91::/4865.5k × /64RIPE NCCCZ9th Dec 2014
2001:7f8:ae::/4865.5k × /64RIPE NCCCZ31st Jan 2017
2001:7f8:d8::/4865.5k × /64RIPE NCCCZ29th Mar 2019
2001:7f8:f6::/4865.5k × /64RIPE NCCCZ9th Jun 2020
217.65.69.0/24256RIPE NCCCZ12th May 2025
217.70.2.0/24256RIPE NCCCZ30th Jul 2025
2a00:1c88::/2934.4B × /64RIPE NCCCZ4th Mar 2010
2a00:9160::/324.3B × /64RIPE NCCCZ27th May 2013
2a00:9fc0::/324.3B × /64RIPE NCCCZ20th Feb 2012
2a00:d040::/324.3B × /64RIPE NCCCZ30th Mar 2012
2a00:e3c0::/324.3B × /64RIPE NCCCZ2nd Jun 2015
2a00:f100::/324.3B × /64RIPE NCCCZ23rd Feb 2011
2a01:57c0::/2934.4B × /64RIPE NCCCZ5th Jun 2012
2a01:6220::/324.3B × /64RIPE NCCCZ5th Dec 2013
2a01:69a0::/324.3B × /64RIPE NCCCZ16th Dec 2013
2a01:6a80::/324.3B × /64RIPE NCCCZ16th Jun 2011
2a01:7ba0::/324.3B × /64RIPE NCCCZ15th Jan 2014
2a01:a4e0::/324.3B × /64RIPE NCCCZ7th Mar 2014
2a01:a8e0::/324.3B × /64RIPE NCCCZ12th Mar 2014
2a01:afc0::/324.3B × /64RIPE NCCCZ29th Aug 2012
2a01:bda0::/324.3B × /64RIPE NCCCZ4th Apr 2014
2a02:1360::/324.3B × /64RIPE NCCCZ14th May 2010
2a02:1638::/324.3B × /64RIPE NCCCZ28th May 2010
2a02:2730::/324.3B × /64RIPE NCCCZ25th Oct 2010
2a02:29c0::/324.3B × /64RIPE NCCCZ17th Nov 2010
2a02:4f0::/324.3B × /64RIPE NCCCZ20th Jun 2008