% 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 '203.115.10.0 - 203.115.10.127'

% Abuse contact for '203.115.10.0 - 203.115.10.127' is 'abuse@slt.lk'

inetnum:        203.115.10.0 - 203.115.10.127
netname:        POP3-SLT-LK
country:        LK
descr:          POP3
descr:          Sri Lanka Telecom, Lotus Rd, Colombo-01
admin-c:        NS198-AP
tech-c:         NS198-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         MNT-SLT-LK
last-modified:  2010-08-16T02:55:28Z
source:         APNIC

person:         Network Administrator SLTNet
nic-hdl:        NS198-AP
e-mail:         nwadmin@sltnet.lk
address:        Sri Lanka Telecom
address:        Internet Operations Centre
address:        5th Floor, OTS Building, Lotus Road
address:        Colombo - 1
phone:          +94-11-2021653
fax-no:         +94-11- 2434020
country:        LK
remarks:        -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-
remarks:        Please send all IP abuse complaints to abuse@slt.lk
remarks:        -+-+-+-+-+-+-+-+-+-+-+-++-+-+-+-+-+-+-+-+-+-+-+-+-+-
mnt-by:         MNT-SLT-LK
last-modified:  2009-03-13T10:31:02Z
source:         APNIC

% Information related to '203.115.0.0/18AS9329'

route:          203.115.0.0/18
origin:         AS9329
descr:          Sri Lanka Telecom Ltd
                Lotus Road
                OTS Building.  7 / F
                ISP Opeartions Section
mnt-by:         MNT-SLT-LK
last-modified:  2019-10-17T07:52:17Z
source:         APNIC

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