Whois

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to '2404:d540::/32'

% Abuse contact for '2404:d540::/32' is '[email protected]'

inet6num:       2404:d540::/32
netname:        HGC1-JPNIC-JP-20190507
descr:          Japan Network Information Center
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
remarks:        JPNIC Allocation Block
remarks:        Authoritative information regarding assignments and
remarks:        allocations made from within this block can also be
remarks:        queried at whois.nic.ad.jp. To obtain an English
remarks:        output query whois -h whois.nic.ad.jp x.x.x.x/e
remarks:        ***********************************
remarks:        For abuse/any contacts regarding this address range,
remarks:        please refer to the contacts listed on the inet6num
remarks:        object displayed down below, or look up JPNIC Whois.
remarks:        ************************************
country:        JP
mnt-by:         MAINT-JPNIC
mnt-lower:      MAINT-JPNIC
mnt-irt:        IRT-JPNIC-JP
mnt-routes:     MAINT-JPNIC
status:         ALLOCATED PORTABLE
last-modified:  2019-05-07T05:53:29Z
source:         APNIC

% Information related to '2404:d540:1::/48'

inet6num:       2404:d540:1::/48
netname:        UTNET-V6
descr:          THE UNIVERSITY OF TOKYO
country:        JP
admin-c:        MN010JP
tech-c:         MN010JP
tech-c:         YS7474JP
last-modified:  2019-11-26T23:20:03Z
remarks:        This information has been partially mirrored by APNIC from
remarks:        JPNIC. To obtain more specific information, please use the
remarks:        JPNIC WHOIS Gateway at
remarks:        http://www.nic.ad.jp/en/db/whois/en-gateway.html or
remarks:        whois.nic.ad.jp for WHOIS client. (The WHOIS client
remarks:        defaults to Japanese output, use the /e switch for English
remarks:        output)
source:         JPNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-UK2)