% 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 '59.191.240.0 - 59.191.255.255'

% Abuse contact for '59.191.240.0 - 59.191.255.255' is 'abuse@gtt.net'

inetnum:        59.191.240.0 - 59.191.255.255
netname:        GTT-HK
descr:          GTT Communications HK Limited
descr:          c/o Horwath Management Services Limited
descr:          38th Floor Central Plaza, 18 Harbour Road
country:        HK
org:            ORG-THKL1-AP
admin-c:        GCHL3-AP
tech-c:         GCHL3-AP
status:         ALLOCATED PORTABLE
abuse-c:        AG890-AP
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-GTT-HK
mnt-routes:     MAINT-GTT-HK
mnt-irt:        IRT-GTT-AP
last-modified:  2021-03-09T01:18:31Z
source:         APNIC

irt:            IRT-GTT-AP
address:        GTT Communications, Inc.
address:        7900 Tysons One Place
address:        Suite 1450
address:        McLean, VA 22102
address:        US
phone:          +1 703 442 5500
fax-no:         +1 703 442 5501
e-mail:         noc@gtt.net
abuse-mailbox:  abuse@gtt.net
admin-c:        THKL1-AP
tech-c:         THKL1-AP
auth:           # Filtered
remarks:        noc@gtt.net was validated on 2026-01-23
remarks:        abuse@gtt.net was validated on 2026-04-19
mnt-by:         MAINT-TINET-HK
last-modified:  2026-04-19T09:37:48Z
source:         APNIC

organisation:   ORG-THKL1-AP
org-name:       GTT Communications HK Limited
org-type:       LIR
country:        HK
address:        GTT Communications, Inc
address:        c/o Horwath Management Services Limited
address:        38th Floor Central Plaza, 18 Harbour Road
phone:          +49-6102-8235-381
fax-no:         +49-6102-8235-389
e-mail:         netguartd@gtt.net
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:15:37Z
source:         APNIC

role:           ABUSE GTTAP
country:        ZZ
address:        GTT Communications, Inc.
address:        7900 Tysons One Place
address:        Suite 1450
address:        McLean, VA 22102
address:        US
phone:          +1 703 442 5500
e-mail:         noc@gtt.net
admin-c:        THKL1-AP
tech-c:         THKL1-AP
nic-hdl:        AG890-AP
remarks:        Generated from irt object IRT-GTT-AP
remarks:        noc@gtt.net was validated on 2026-01-23
remarks:        abuse@gtt.net was validated on 2026-04-19
abuse-mailbox:  abuse@gtt.net
mnt-by:         APNIC-ABUSE
last-modified:  2026-04-19T09:38:07Z
source:         APNIC

role:           GTT Communications HK Limited - network administrator
address:        38th Floor Central Plaza, 18 Harbour Road, Wanchai, Hong Kong
country:        HK
phone:          +49-6102-8235 381
fax-no:         +49-6102-8235 389
e-mail:         netguard@gtt.net
admin-c:        GCHL3-AP
tech-c:         GCHL3-AP
nic-hdl:        GCHL3-AP
mnt-by:         MAINT-GTT-HK
last-modified:  2020-09-15T22:58:37Z
source:         APNIC

% Information related to '59.191.240.0/20AS3257'

route:          59.191.240.0/20
origin:         AS3257
descr:          GTT Communications HK Limited
                GTT Communications, Inc
                c/o Horwath Management Services Limited
                38th Floor Central Plaza, 18 Harbour Road
mnt-by:         MAINT-GTT-HK
last-modified:  2021-11-12T12:42:27Z
source:         APNIC

% Information related to '59.191.240.0/20AS4589'

route:          59.191.240.0/20
descr:          Easynet Global Services
remarks:        global managed network, hosting, and telepresence company
origin:         AS4589
mnt-by:         MAINT-GTT-HK
last-modified:  2021-03-09T01:30:18Z
source:         APNIC

% Information related to '59.191.240.0/20AS5580'

route:          59.191.240.0/20
origin:         AS5580
descr:          GTT Communications HK Limited
                GTT Communications, Inc
                c/o Horwath Management Services Limited
                38th Floor Central Plaza, 18 Harbour Road
mnt-by:         MAINT-GTT-HK
last-modified:  2021-11-12T12:42:52Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU4)