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

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% Information related to '210.51.160.0 - 210.51.175.255'

% Abuse contact for '210.51.160.0 - 210.51.175.255' is 'zhaoyz3@chinaunicom.cn'

inetnum:        210.51.160.0 - 210.51.175.255
netname:        CNC-BJ-IDC2
country:        CN
descr:          Beijing YiZhuang IDC of China Netcom
admin-c:        CH140-AP
tech-c:         TJ35-AP
status:         ALLOCATED NON-PORTABLE
mnt-by:         MAINT-CN-ZM28
mnt-lower:      MAINT-CN-BJIDC
last-modified:  2008-09-04T06:57:09Z
source:         APNIC

role:           CNCIDC hostmaster
address:        No.1,Beihuan Donglu,BDA,Beijing,China
country:        CN
phone:          +8610 6787 5599
fax-no:         +8610 6787 8624
e-mail:         cncipaddr@china-netcom.com
remarks:        send spam and abuse reports to tech-group@china-netcom.com
remarks:        Please include detailed information and times in UTC
admin-c:        TJ35-AP
tech-c:         TC254-AP
nic-hdl:        Ch140-AP
notify:         cncipaddr@china-netcom.com
mnt-by:         MAINT-CN-ZM28
last-modified:  2011-12-06T00:11:27Z
source:         APNIC

person:         Tao Jiang
nic-hdl:        TJ35-AP
e-mail:         bjidc-ipaddr@cnc.cn
address:        No.1,Beihuan Donglu, Beijing Economic
address:        -TechnologicalDevelopment Area,Beijing
phone:          +8610-67878534
fax-no:         +8610-67878538
country:        CN
mnt-by:         MAINT-CN-BJIDC
last-modified:  2008-09-04T07:32:50Z
source:         APNIC

% Information related to '210.51.160.0/19AS4808'

route:          210.51.160.0/19
descr:          China Unicom Beijing Province Network
country:        CN
origin:         AS4808
mnt-by:         MAINT-CNCGROUP-RR
last-modified:  2016-05-20T01:24:02Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-AU2)

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