% APNIC found the following authoritative answer from: whois.apnic.net

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

% Information related to '163.42.0.0 - 163.42.255.255'

% Abuse contact for '163.42.0.0 - 163.42.255.255' is 'hostmaster@nic.ad.jp'

inetnum:        163.42.0.0 - 163.42.255.255
netname:        GSI-NET
country:        JP
descr:          Geospatial Information Authority of Japan, Ministry of Land, Infrastructure, Transport and Tourism
admin-c:        IS300-AP
tech-c:         IS300-AP
status:         ALLOCATED PORTABLE
notify:         gsi-www-staff2+2@gxb.mlit.go.jp
mnt-by:         MAINT-JPNIC
mnt-irt:        IRT-JPNIC-JP
mnt-lower:      MAINT-JPNIC
last-modified:  2023-10-25T02:56:02Z
source:         APNIC

irt:            IRT-JPNIC-JP
address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, japan
e-mail:         hostmaster@nic.ad.jp
abuse-mailbox:  hostmaster@nic.ad.jp
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
auth:           # Filtered
remarks:        hostmaster@nic.ad.jp was validated on 2024-11-27
mnt-by:         MAINT-JPNIC
last-modified:  2025-09-04T01:00:00Z
source:         APNIC

person:         Info System
nic-hdl:        IS300-AP
e-mail:         gsi-infosys-g-2@gxb.mlit.go.jp
address:        1 Kitasato, Tsukuba, Ibaraki 305-0811, Japan
phone:          +81-29-864-4705
country:        JP
mnt-by:         MAINT-JPNIC
last-modified:  2023-10-25T02:48:02Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.36-SNAPSHOT (WHOIS-AU5)