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

% [whois.apnic.net]
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% Information related to '103.77.16.0 - 103.77.16.255'

% Abuse contact for '103.77.16.0 - 103.77.16.255' is 'abuse@pcnetbd.com'

inetnum:        103.77.16.0 - 103.77.16.255
netname:        ICCNET-DHK-BD
descr:          ICC Communication Ltd.
country:        BD
admin-c:        ICNA6-AP
tech-c:         ICNA6-AP
abuse-c:        AP942-AP
status:         ASSIGNED NON-PORTABLE
mnt-by:         MAINT-PC-NET-BD
mnt-lower:      MAINT-PC-NET-BD
mnt-routes:     MAINT-PC-NET-BD
mnt-irt:        IRT-PC-NET-BD
last-modified:  2022-04-23T21:10:00Z
source:         APNIC

irt:            IRT-PC-NET-BD
address:        Section
e-mail:         sdbmani@gmail.com
abuse-mailbox:  abuse@pcnetbd.com
admin-c:        PNA20-AP
tech-c:         PNA20-AP
auth:           # Filtered
remarks:        abuse@pcnetbd.com is invalid
remarks:        sdbmani@gmail.com was validated on 2025-06-16
mnt-by:         MAINT-PC-NET-BD
last-modified:  2025-11-18T00:31:11Z
source:         APNIC

role:           ABUSE PCNETBD
country:        ZZ
address:        Section # 2, Avenue 3, Plot 12, Haji Road, Mirpur, Dhaka Bangladesh 1216
phone:          +000000000
e-mail:         sdbmani@gmail.com
admin-c:        PNA20-AP
tech-c:         PNA20-AP
nic-hdl:        AP942-AP
remarks:        Generated from irt object IRT-PC-NET-BD
remarks:        abuse@pcnetbd.com is invalid
remarks:        sdbmani@gmail.com was validated on 2025-06-16
abuse-mailbox:  abuse@pcnetbd.com
mnt-by:         APNIC-ABUSE
last-modified:  2025-06-16T13:28:13Z
source:         APNIC

role:           ICC COMMUNICATION - Network Administrator
address:        SN Centre, Plot# 15-18, Lane# 6, Block# D, Mirpur# 12, Dhaka 1216
country:        BD
phone:          +8809639123123
e-mail:         smani@icc-communication.com
admin-c:        ICNA6-AP
tech-c:         ICNA6-AP
nic-hdl:        ICNA6-AP
mnt-by:         MAINT-ICCNET-DHK-BD
last-modified:  2019-01-23T10:43:05Z
source:         APNIC

% Information related to '103.77.16.0/24AS58689'

route:          103.77.16.0/24
origin:         AS58689
descr:          ICC Communication Ltd.
mnt-by:         MAINT-PC-NET-BD
last-modified:  2022-04-23T21:24:18Z
country:        BD
mnt-routes:     MAINT-PC-NET-BD
mnt-lower:      MAINT-PC-NET-BD
source:         APNIC

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