% 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 '210.66.0.0 - 210.66.255.255'

% Abuse contact for '210.66.0.0 - 210.66.255.255' is 'antispam@seed.net.tw'

inetnum:        210.66.0.0 - 210.66.255.255
netname:        NCICNET-NET
descr:          New Century InfoComm Tech. Co., Ltd.
descr:          1F~11F, No. 218, Rueiguang Road
descr:          Taipei, Taiwan
country:        TW
admin-c:        nNA3-AP
tech-c:         nNA3-AP
abuse-c:        AT939-AP
status:         ALLOCATED PORTABLE
mnt-by:         MAINT-TW-TWNIC
mnt-irt:        IRT-NCIC-TW
last-modified:  2025-11-07T02:31:01Z
source:         APNIC

irt:            IRT-NCIC-TW
address:        New Century InfoComm Tech. Co., Ltd.
address:        1F~11F, No. 218, Rueiguang Road
address:        Taipei Taiwan 114
e-mail:         antispam@seed.net.tw
abuse-mailbox:  antispam@seed.net.tw
admin-c:        JC256-AP
tech-c:         JC256-AP
auth:           # Filtered
mnt-by:         MAINT-TW-TWNIC
last-modified:  2025-11-06T07:26:18Z
source:         APNIC

role:           ABUSE TWNICAP
country:        ZZ
address:        3F., No. 123, Sec. 4, Bade Rd., Songshan Dist., Taipei 105, Taiwan
phone:          +000000000
e-mail:         hostmaster@twnic.tw
admin-c:        TWA2-AP
tech-c:         TWA2-AP
nic-hdl:        AT939-AP
remarks:        Generated from irt object IRT-TWNIC-AP
remarks:        hostmaster@twnic.tw was validated on 2025-05-23
abuse-mailbox:  hostmaster@twnic.tw
mnt-by:         APNIC-ABUSE
last-modified:  2025-05-23T00:02:10Z
source:         APNIC

role:           ncic Network Administrator
address:        1F~11F, No. 218, Rueiguang Road
address:        Taipei, Taiwan, 114, R.O.C
country:        TW
phone:          +886-2-7715-5128
fax-no:         +886-2-7715-5299
e-mail:         DavidLin1@fareastone.com.tw
admin-c:        JC256-AP
tech-c:         JC256-AP
nic-hdl:        nNA3-AP
remarks:        The role object should be used when making
remarks:        changes to admin-c or tech-c handle.
notify:         hostmaster@twnic.net.tw
mnt-by:         MAINT-TW-TWNIC
last-modified:  2010-05-31T07:44:01Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-AU4)