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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

1,447 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1251 to 1300 of 1447
PrefixAddressesRegistryCountryAllocated
2402:59e0::/324.3B × /64APNICJP22nd Apr 2026
2402:5a20::/324.3B × /64APNICJP22nd Apr 2026
2402:6700::/324.3B × /64APNICJP28th Oct 2011
2402:6800::/324.3B × /64APNICJP2nd Jul 2008
2402:6ba0::/324.3B × /64APNICJP3rd Aug 2026
2402:7440::/324.3B × /64APNICJP7th Feb 2018
2402:7f80::/324.3B × /64APNICJP26th Jun 2015
2402:8240::/324.3B × /64APNICJP26th Feb 2018
2402:af40::/324.3B × /64APNICJP4th Apr 2018
2402:b700::/324.3B × /64APNICJP16th Dec 2011
2402:c080::/318.6B × /64APNICJP13th Aug 2015
2402:d200::/324.3B × /64APNICJP15th Jun 2010
2402:dc00::/324.3B × /64APNICJP16th Nov 2009
2402:de0::/324.3B × /64APNICJP28th May 2025
2402:f2c0::/324.3B × /64APNICJP25th May 2018
2403:1800::/324.3B × /64APNICJP14th Aug 2008
2403:2000::/324.3B × /64APNICJP22nd Jun 2007
2403:2dc0::/324.3B × /64APNICJP10th Jul 2018
2403:4400::/324.3B × /64APNICJP10th Dec 2009
2403:5f00::/324.3B × /64APNICJP20th Mar 2012
2403:8f00::/324.3B × /64APNICJP12th Apr 2012
2403:9600::/324.3B × /64APNICJP29th Jul 2010
2403:a700::/324.3B × /64APNICJP19th Apr 2012
2403:d001::/324.3B × /64APNICJP7th Sept 2020
2403:dd40::/324.3B × /64APNICJP31st Oct 2018
2403:e4c0::/324.3B × /64APNICJP5th Nov 2018
2403:f200::/324.3B × /64APNICJP16th Aug 2010
2404:1300::/324.3B × /64APNICJP30th May 2012
2404:5100::/324.3B × /64APNICJP2nd Jul 2012
2404:5480::/324.3B × /64APNICJP18th Feb 2016
2404:7200::/324.3B × /64APNICJP17th Sept 2010
2404:8200::/324.3B × /64APNICJP23rd Sept 2010
2404:8640::/324.3B × /64APNICJP4th Mar 2019
2404:8740::/324.3B × /64APNICJP4th Mar 2019
2404:9000::/324.3B × /64APNICJP21st Jan 2009
2404:9840::/324.3B × /64APNICJP11th Mar 2019
2404:9ac0::/324.3B × /64APNICJP13th Mar 2019
2404:b600::/324.3B × /64APNICJP5th Oct 2010
2404:ce00::/324.3B × /64APNICJP6th Oct 2010
2404:e000::/324.3B × /64APNICJP23rd Dec 2008
2404:f1c0::/324.3B × /64APNICJP11th Jun 2019
2405:1140::/324.3B × /64APNICJP17th Jul 2019
2405:1440::/324.3B × /64APNICJP22nd Jul 2019
2405:2040::/324.3B × /64APNICJP31st Jul 2019
2405:3600::/324.3B × /64APNICJP16th Nov 2010
2405:3700::/324.3B × /64APNICJP20th Sept 2012
2405:4e00::/324.3B × /64APNICJP19th Nov 2010
2405:640::/324.3B × /64APNICJP8th Jul 2019
2405:7c0::/324.3B × /64APNICJP9th Jul 2019
2405:9ac0::/324.3B × /64APNICJP17th Dec 2019