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



% [whois.apnic.net]
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% Information related to '220.157.1.0 - 220.157.1.255'

% Abuse contact for '220.157.1.0 - 220.157.1.255' is 'hostmaster@nic.ad.jp'

inetnum:        220.157.1.0 - 220.157.1.255
netname:        SNTU
descr:          Sanntsu Corporation
descr:          MSB-21Minamiotsuka Bldg 10F, 2-37-5 Minamiotsuka, Toshima-ku, Tokyo 170-0005, Japan
admin-c:        JNIC1-AP
tech-c:         JNIC1-AP
remarks:        Email address for spam or abuse complaints : takata@sanntsu.com
country:        JP
org:            ORG-JNIC1-AP
mnt-by:         MAINT-JPNIC
mnt-lower:      MAINT-JPNIC
mnt-irt:        IRT-JPNIC-JP
status:         ALLOCATED PORTABLE
last-modified:  2019-12-13T02:16:58Z
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

organisation:   ORG-JNIC1-AP
org-name:       Japan Network Information Center
org-type:       NIR
country:        JP
address:        Urbannet-Kanda Bldg 4F
address:        3-6-2 Uchi-Kanda
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         hostmaster@nic.ad.jp
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T01:49:57Z
source:         APNIC

role:           Japan Network Information Center
address:        Uchikanda OS Bldg 4F, 2-12-6 Uchi-Kanda
address:        Chiyoda-ku, Tokyo 101-0047, Japan
country:        JP
phone:          +81-3-5297-2311
fax-no:         +81-3-5297-2312
e-mail:         hostmaster@nic.ad.jp
admin-c:        JI13-AP
tech-c:         JE53-AP
nic-hdl:        JNIC1-AP
mnt-by:         MAINT-JPNIC
last-modified:  2022-01-05T03:04:02Z
source:         APNIC

% Information related to '220.157.1.0 - 220.157.1.255'

inetnum:        220.157.1.0 - 220.157.1.255
netname:        SNTU-CIDR-BLK-JP
descr:          Sanntsu Corporation
remarks:        Email address for spam or abuse complaints : abuse@sanntsu.com
country:        JP
admin-c:        JP00175831
tech-c:         JP00175831
last-modified:  2019-12-11T20:37:57Z
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-AU4)