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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 1301 to 1350 of 1447
PrefixAddressesRegistryCountryAllocated
2405:9fc0::/324.3B × /64APNICJP19th Dec 2019
2405::/324.3B × /64APNICJP7th Nov 2006
2405:c100::/324.3B × /64APNICJP20th Nov 2012
2405:d780::/324.3B × /64APNICJP28th Jun 2016
2405:e00::/324.3B × /64APNICJP2nd Nov 2010
2406:1c0::/324.3B × /64APNICJP15th Apr 2020
2406:2900::/324.3B × /64APNICJP29th Jan 2013
2406:500::/324.3B × /64APNICJP4th Jan 2013
2406:5200::/324.3B × /64APNICJP17th Jan 2011
2406:63c0::/324.3B × /64APNICJP26th Aug 2020
2406:6e40::/324.3B × /64APNICJP8th Sept 2020
2406:c700::/324.3B × /64APNICJP19th Apr 2013
2406:d6c0::/324.3B × /64APNICJP4th Dec 2020
2406:e700::/324.3B × /64APNICJP8th May 2013
2406:e800::/324.3B × /64APNICJP28th Apr 2009
2406:fd40::/324.3B × /64APNICJP6th Jan 2021
2407:1dc0::/324.3B × /64APNICJP15th Feb 2021
2407:5300::/324.3B × /64APNICJP27th Jun 2013
2407:5680::/324.3B × /64APNICJP22nd Sept 2016
2407:6140::/324.3B × /64APNICJP13th May 2021
2407:8a00::/324.3B × /64APNICJP4th Mar 2011
2407:9580::/324.3B × /64APNICJP19th Oct 2016
2407:a840::/324.3B × /64APNICJP16th Jul 2021
2407:d800::/324.3B × /64APNICJP26th May 2009
2407:e600::/324.3B × /64APNICJP28th Mar 2011
2407:eb40::/324.3B × /64APNICJP25th Sept 2021
2407:ee40::/324.3B × /64APNICJP27th Sept 2021
2407:f240::/324.3B × /64APNICJP29th Sept 2021
2407:f600::/324.3B × /64APNICJP29th Mar 2011
2602:f75d::/36268M × /64ARINJP19th Dec 2024
2602:f780::/36268M × /64ARINJP27th Nov 2024
2602:f796::/4016.8M × /64ARINJP18th Nov 2024
2602:f7a9::/36268M × /64ARINJP7th Nov 2024
2602:f840::/36268M × /64ARINJP14th Aug 2024
2602:fec7::/4016.8M × /64ARINJP23rd Jan 2026
2602:fece::/4016.8M × /64ARINJP23rd Jan 2026
2602:ff22::/4016.8M × /64ARINJP27th Jan 2026
27.120.176.0/221kAPNICJP2nd Sept 2010
27.122.4.0/221kAPNICJP2nd Mar 2011
27.122.48.0/212kAPNICJP4th Oct 2010
27.123.236.0/221kAPNICJP5th Aug 2016
27.126.160.0/204.1kAPNICJP19th Oct 2010
27.131.200.0/212kAPNICJP21st Apr 2010
27.132.0.0/212kAPNICJP21st Apr 2010
27.132.176.0/204.1kAPNICJP21st Apr 2010
27.133.10.0/23512APNICJP21st Apr 2010
27.133.172.0/23512APNICJP21st Apr 2010
27.133.174.0/24256APNICJP21st Apr 2010
27.133.175.0/24256APNICJP21st Apr 2010
27.133.208.0/204.1kAPNICJP21st Apr 2010