% 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 '103.72.136.0 - 103.72.137.255'

% Abuse contact for '103.72.136.0 - 103.72.137.255' is 'systemadmin@spectrabd.net'

inetnum:        103.72.136.0 - 103.72.137.255
netname:        SPECTRA1-BD
descr:          Spectra Technologies Limited
country:        BD
org:            ORG-STL29-AP
admin-c:        STLA12-AP
tech-c:         STLA12-AP
abuse-c:        AS3466-AP
status:         ALLOCATED PORTABLE
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-SPECTRA1-BD
mnt-routes:     MAINT-SPECTRA1-BD
mnt-irt:        IRT-SPECTRA1-BD
last-modified:  2023-01-20T02:12:48Z
source:         APNIC

irt:            IRT-SPECTRA1-BD
address:        222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205, 222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205, Dhaka Dhaka 1205
e-mail:         systemadmin@spectrabd.net
abuse-mailbox:  systemadmin@spectrabd.net
admin-c:        STLA12-AP
tech-c:         STLA12-AP
auth:           # Filtered
remarks:        systemadmin@spectrabd.net was validated on 2025-12-07
mnt-by:         MAINT-SPECTRA1-BD
last-modified:  2025-12-07T06:22:34Z
source:         APNIC

organisation:   ORG-STL29-AP
org-name:       Spectra Technologies Limited
org-type:       LIR
country:        BD
address:        222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205
address:        222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205
phone:          +8809678335566
e-mail:         hello@spectrabd.net
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2023-09-05T02:19:09Z
source:         APNIC

role:           ABUSE SPECTRA1BD
country:        ZZ
address:        222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205, 222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205, Dhaka Dhaka 1205
phone:          +000000000
e-mail:         systemadmin@spectrabd.net
admin-c:        STLA12-AP
tech-c:         STLA12-AP
nic-hdl:        AS3466-AP
remarks:        Generated from irt object IRT-SPECTRA1-BD
remarks:        systemadmin@spectrabd.net was validated on 2025-12-07
abuse-mailbox:  systemadmin@spectrabd.net
mnt-by:         APNIC-ABUSE
last-modified:  2025-12-07T06:22:47Z
source:         APNIC

role:           Spectra Technologies Limited administrator
address:        222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205, 222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205, Dhaka Dhaka 1205
country:        BD
phone:          +8809678335566
e-mail:         systemadmin@spectrabd.net
admin-c:        STLA12-AP
tech-c:         STLA12-AP
nic-hdl:        STLA12-AP
mnt-by:         MAINT-SPECTRA1-BD
last-modified:  2023-01-19T05:32:44Z
source:         APNIC

% Information related to '103.72.137.0/24AS133112'

route:          103.72.137.0/24
origin:         AS133112
descr:          Ashis Kumar Khan
                222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205
                222 Dr. Kudrat- E- Khuda Road, New Elephant Road, Dhaka 1205
mnt-by:         MAINT-SPECTRA1-BD
last-modified:  2023-01-21T08:52:27Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.36-SNAPSHOT (WHOIS-AU5)