% 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 'MAINT-CN-ZM28'

mntner:         MAINT-CN-ZM28
upd-to:         tech-group@china-netcom.com
auth:           # Filtered
descr:          The staff who is in charge of China Netcom Corp. Internet
descr:          registering.
admin-c:        YG1-AP
tech-c:         TC254-AP
referral-by:    APNIC-HM
mnt-by:         MAINT-CN-ZM28
remarks:        http://www.cnc.net.cn
last-modified:  2018-03-20T07:04:43Z
source:         APNIC

person:         TECH GROUP CNC
nic-hdl:        TC254-AP
address:        9/F, Building A, Corporate Square, No. 35 Financial Street,
address:        Xicheng District, Beijing 100032, P.R.China
country:        CN
phone:          +86-10-88093588
fax-no:         +86-10-88091442
e-mail:         hqs-ipabuse@chinaunicom.cn
mnt-by:         MAINT-CN-ZM28
last-modified:  2017-08-17T06:13:18Z
source:         APNIC

person:         Yibei Guo
nic-hdl:        YG1-AP
e-mail:         hqs-ipabuse@chinaunicom.cn
address:        No.1,Beihuan Donglu,Beijing Development Area, Beijing 100176
phone:          +86-10-67875599
fax-no:         +86-10-67878624
country:        CN
mnt-by:         MAINT-CN-ZM28
last-modified:  2017-08-17T06:13:19Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-AU1)

Search for
IP address lookups			Miscellaneous queries
-l	1st level less specific		-i	Inverse attributes	None admin-c admin-c,tech-c,zone-c author cross-mnt cross-nfy local-as mbrs-by-ref member-of mnt-by mnt-lower mnt-nfy mnt-routes notify nserver origin person referral-by rev-srv sub-dom tech-c upd-to zone-c
-L	All less specific		-T	Object types	All as-block as-set aut-num domain filter-set inet-rtr inet6num inetnum irt key-cert mntner peering-set person role route route-set rtr-set
-m	1st level more specific
-M	All more specific		Query hints Include "AS" in front of an AS number. Example: AS4808 Include "-t" (template only) or "-v" (template and description) in front of an object name to view the template Example: -t inetnum
-x	Exact match only
-d	Associated reverse domain