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

% [whois.apnic.net]
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% Information related to '42.100.0.0 - 42.103.255.255'

% Abuse contact for '42.100.0.0 - 42.103.255.255' is 'anti-spam@chinatelecom.cn'

inetnum:        42.100.0.0 - 42.103.255.255
netname:        CHINANET-HL
descr:          CHINANET HEILONGJIANG PROVINCE NETWORK
descr:          Heilongjiang Telecom Corporation
descr:          NO.178 Zhongshan Road,Haerbin,Heilongjiang 150040
country:        CN
admin-c:        XW806-AP
tech-c:         XW806-AP
abuse-c:        AC1573-AP
status:         ALLOCATED PORTABLE
remarks:        service provider
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CHINANET-HL
mnt-routes:     MAINT-CHINANET-HL
mnt-irt:        IRT-CHINANET-CN
last-modified:  2021-06-15T08:05:31Z
source:         APNIC

irt:            IRT-CHINANET-CN
address:        No.31 ,jingrong street,beijing
address:        100032
e-mail:         anti-spam@chinatelecom.cn
abuse-mailbox:  anti-spam@chinatelecom.cn
admin-c:        CH93-AP
tech-c:         CH93-AP
auth:           # Filtered
remarks:        anti-spam@chinatelecom.cn was validated on 2025-11-13
mnt-by:         MAINT-CHINANET
last-modified:  2025-11-18T00:26:23Z
source:         APNIC

role:           ABUSE CHINANETCN
country:        ZZ
address:        No.31 ,jingrong street,beijing
address:        100032
phone:          +000000000
e-mail:         anti-spam@chinatelecom.cn
admin-c:        CH93-AP
tech-c:         CH93-AP
nic-hdl:        AC1573-AP
remarks:        Generated from irt object IRT-CHINANET-CN
remarks:        anti-spam@chinatelecom.cn was validated on 2025-11-13
abuse-mailbox:  anti-spam@chinatelecom.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-11-13T14:15:15Z
source:         APNIC

person:         xiang Wu
nic-hdl:        XW806-AP
e-mail:         jxwx1234@163.com
address:        heilongjiang telecom
phone:          +86-45153902001
country:        CN
mnt-by:         MAINT-CHINANET-HL
last-modified:  2008-09-04T07:46:06Z
source:         APNIC

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