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It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today.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, 1201 to 1250 of 1447
PrefixAddressesRegistryCountryAllocated
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
2401:3aa0::/324.3B × /64APNICJP19th Sept 2023
2401:3b00::/324.3B × /64APNICJP17th Jun 2011
2401:4360::/324.3B × /64APNICJP11th Oct 2023
2401:43a0::/324.3B × /64APNICJP11th Oct 2023
2401:600::/324.3B × /64APNICJP25th Mar 2010
2401:7040::/324.3B × /64APNICJP27th Jun 2017
2401:7b60::/324.3B × /64APNICJP29th Jan 2024
2401:7f00::/324.3B × /64APNICJP14th Jul 2011
2401:8280::/324.3B × /64APNICJP1st Sept 2014
2401:8520::/324.3B × /64APNICJP4th Mar 2024
2401:9220::/324.3B × /64APNICJP8th Apr 2024
2401:9fe0::/324.3B × /64APNICJP17th May 2024
2401:a1c0::/324.3B × /64APNICJP15th Aug 2017
2401:a380::/324.3B × /64APNICJP6th Oct 2014
2401:a500::/324.3B × /64APNICJP4th Aug 2011
2401:ad00::/324.3B × /64APNICJP9th Aug 2011
2401:b9c0::/324.3B × /64APNICJP5th Sept 2017
2401:c1a0::/324.3B × /64APNICJP9th Sept 2024
2401:cba0::/324.3B × /64APNICJP9th Oct 2024
2401:cee0::/324.3B × /64APNICJP21st Oct 2024
2401:d0a0::/324.3B × /64APNICJP27th Oct 2024
2401:d440::/324.3B × /64APNICJP29th Sept 2017
2401:d700::/324.3B × /64APNICJP30th Aug 2011
2401:dbc0::/324.3B × /64APNICJP10th Oct 2017
2401:efc0::/324.3B × /64APNICJP31st Oct 2017
2401:f280::/324.3B × /64APNICJP21st Jan 2015
2401:f820::/324.3B × /64APNICJP21st Mar 2025
2402:1d00::/324.3B × /64APNICJP3rd Oct 2011
2402:1e80::/324.3B × /64APNICJP9th Mar 2015
2402:3260::/324.3B × /64APNICJP15th Oct 2025
2402:3c60::/324.3B × /64APNICJP3rd Dec 2025
2402:40a0::/324.3B × /64APNICJP17th Dec 2025
2402:5120::/324.3B × /64APNICJP9th Mar 2026
2402:52e0::/324.3B × /64APNICJP26th Mar 2026
2402:56c0::/324.3B × /64APNICJP15th Jan 2018