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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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

Unannounced blocks in Japan

1,422 blocks match, ordered by prefix.

Allocated but unannounced blocks, 1151 to 1200 of 1422
PrefixAddressesRegistryCountryAllocated
220.44.0.0/14262kAPNICJP12th Apr 2002
221.121.176.0/212kAPNICJP31st Jul 2006
221.128.0.0/1816.4kAPNICJP19th Aug 2003
221.128.104.0/221kAPNICJP8th Oct 2003
221.128.108.0/23512APNICJP8th Oct 2003
221.128.110.0/24256APNICJP8th Oct 2003
221.128.115.0/24256APNICJP8th Oct 2003
221.128.116.0/24256APNICJP8th Oct 2003
221.128.118.0/23512APNICJP8th Oct 2003
221.128.121.0/24256APNICJP8th Oct 2003
221.128.123.0/24256APNICJP8th Oct 2003
221.128.71.0/24256APNICJP8th Oct 2003
221.128.73.0/24256APNICJP8th Oct 2003
221.128.77.0/24256APNICJP8th Oct 2003
221.128.79.0/24256APNICJP8th Oct 2003
221.128.81.0/24256APNICJP8th Oct 2003
221.128.87.0/24256APNICJP8th Oct 2003
221.128.88.0/221kAPNICJP8th Oct 2003
221.128.97.0/24256APNICJP8th Oct 2003
221.128.98.0/23512APNICJP8th Oct 2003
221.132.120.0/212kAPNICJP30th Dec 2010
221.46.0.0/15131kAPNICJP15th Jan 2003
222.158.64.0/1816.4kAPNICJP2nd Jun 2004
223.27.124.0/221kAPNICJP30th Aug 2010
2400:1b80::/324.3B × /64APNICJP3rd Oct 2013
2400:1de0::/324.3B × /64APNICJP8th Nov 2021
2400:48c0::/324.3B × /64APNICJP22nd Nov 2016
2400:53a0::/324.3B × /64APNICJP26th Jan 2022
2400:7d20::/324.3B × /64APNICJP17th May 2022
2400:8040::/324.3B × /64APNICJP21st Dec 2016
2400:8400::/324.3B × /64APNICJP17th Jul 2009
2400:8d40::/324.3B × /64APNICJP10th Jan 2017
2400:9180::/324.3B × /64APNICJP16th Jan 2014
2400:a080::/324.3B × /64APNICJP14th Feb 2014
2400:b3c0::/324.3B × /64APNICJP16th Feb 2017
2400:b680::/324.3B × /64APNICJP5th Mar 2014
2400:c8a0::/324.3B × /64APNICJP7th Dec 2022
2400:ce20::/324.3B × /64APNICJP23rd Dec 2022
2400:d640::/324.3B × /64APNICJP10th Mar 2017
2400:d820::/324.3B × /64APNICJP19th Jan 2023
2400:e100::/324.3B × /64APNICJP24th May 2011
2400:e400::/324.3B × /64APNICJP7th Aug 2009
2400:f7a0::/324.3B × /64APNICJP19th Apr 2023
2400:f9a0::/324.3B × /64APNICJP1st May 2023
2400:fba0::/324.3B × /64APNICJP8th May 2023
2401:1f20::/324.3B × /64APNICJP2nd Aug 2023
2401:1f60::/324.3B × /64APNICJP2nd Aug 2023
2401:2100::/324.3B × /64APNICJP14th Jun 2011
2401:2940::/324.3B × /64APNICJP22nd May 2017
2401:2a0::/324.3B × /64APNICJP23rd May 2023