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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

511 blocks match, ordered by prefix.

Allocated but unannounced blocks, 351 to 400 of 511
PrefixAddressesRegistryCountryAllocated
2400:1800::/324.3B × /64APNICKR27th Jan 2009
2400:3300::/324.3B × /64APNICKR5th Apr 2011
2400:4780::/324.3B × /64APNICKR31st Oct 2013
2400:4980::/324.3B × /64APNICKR1st Nov 2013
2400:5920::/324.3B × /64APNICKR8th Feb 2022
2400:9e80::/324.3B × /64APNICKR13th Feb 2014
2400:9f80::/324.3B × /64APNICKR13th Feb 2014
2400:a0a0::/324.3B × /64APNICKR16th Aug 2022
2400:a580::/324.3B × /64APNICKR18th Feb 2014
2400:ab00::/324.3B × /64APNICKR5th May 2011
2400:cf00::/324.3B × /64APNICKR16th May 2011
2400:e180::/324.3B × /64APNICKR14th Apr 2014
2400:fda6::/324.3B × /64APNICKR25th Oct 2023
2401:4000::/324.3B × /64APNICKR16th Mar 2007
2401:9ec0::/324.3B × /64APNICKR11th Aug 2017
2401:a000::/324.3B × /64APNICKR31st Jul 2007
2401:a800::/324.3B × /64APNICKR2nd Jun 2008
2401:ae40::/324.3B × /64APNICKR24th Aug 2017
2401:e200::/324.3B × /64APNICKR29th Apr 2010
2401:f560::/324.3B × /64APNICKR12th Mar 2025
2402:1a00::/324.3B × /64APNICKR5th May 2010
2402:3100::/324.3B × /64APNICKR11th Oct 2011
2402:5800::/324.3B × /64APNICKR1st Jul 2008
2402:6100::/324.3B × /64APNICKR27th Oct 2011
2402:7000::/324.3B × /64APNICKR2nd Apr 2008
2402:be00::/324.3B × /64APNICKR8th Jun 2010
2402:de00::/324.3B × /64APNICKR16th Jun 2010
2402:f400::/324.3B × /64APNICKR19th Nov 2009
2403:3700::/324.3B × /64APNICKR1st Mar 2012
2403:3e00::/324.3B × /64APNICKR6th Jul 2010
2403:6300::/324.3B × /64APNICKR21st Mar 2012
2403:6500::/324.3B × /64APNICKR21st Mar 2012
2404:2300::/324.3B × /64APNICKR5th Jun 2012
2404:800::/324.3B × /64APNICKR11th Sept 2008
2405:3500::/324.3B × /64APNICKR20th Sept 2012
2405:3d00::/324.3B × /64APNICKR21st Sept 2012
2405:4300::/324.3B × /64APNICKR24th Sept 2012
2405:5800::/324.3B × /64APNICKR20th Oct 2008
2405:5f00::/324.3B × /64APNICKR10th Oct 2012
2405:8600::/324.3B × /64APNICKR29th Nov 2010
2405:9500::/324.3B × /64APNICKR8th Nov 2012
2405:c000::/324.3B × /64APNICKR8th May 2007
2405:d880::/324.3B × /64APNICKR28th Jun 2016
2406:1ac0::/324.3B × /64APNICKR19th May 2020
2406:4000::/324.3B × /64APNICKR16th Mar 2007
2406:6600::/324.3B × /64APNICKR20th Jan 2011
2406:6800::/324.3B × /64APNICKR1st Apr 2009
2406:6a00::/324.3B × /64APNICKR21st Jan 2011
2406:ad00::/324.3B × /64APNICKR10th Apr 2013
2406:b000::/324.3B × /64APNICKR20th Mar 2008