% 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 '45.250.244.0 - 45.250.247.255'

% Abuse contact for '45.250.244.0 - 45.250.247.255' is 'kaushik@alliancekolkata.com'

inetnum:        45.250.244.0 - 45.250.247.255
netname:        FURTAIN
descr:          Futain Trading Co.
admin-c:        AM1297-AP
tech-c:         MN573-AP
country:        IN
mnt-by:         MAINT-IN-IRINN
mnt-irt:        IRT-FURTAIN-IN
mnt-routes:     MAINT-IN-FURTAIN
status:         ASSIGNED PORTABLE
last-modified:  2016-05-19T05:27:47Z
source:         APNIC

irt:            IRT-FURTAIN-IN
address:        unit No-257,2nd Floor,near North ex mall railway batala road,New Delhi,Delhi-110085
e-mail:         kaushik@alliancekolkata.com
abuse-mailbox:  kaushik@alliancekolkata.com
admin-c:        CD791-AP
tech-c:         CD791-AP
auth:           # Filtered
mnt-by:         MAINT-ABAWSPL-IN
last-modified:  2016-05-30T11:20:38Z
source:         APNIC

role:           manager noc
address:        unit No-257,2nd Floor,near North ex mall railway batala road
country:        IN
phone:          +91 03322277132
e-mail:         abhijitm@alliancekolkata.com
admin-c:        AM1297-AP
tech-c:         AM1297-AP
nic-hdl:        MN573-AP
mnt-by:         MAINT-IN-FURTAIN
last-modified:  2016-05-19T05:26:18Z
source:         APNIC

person:         Abhijit Modak
address:        unit No-257,2nd Floor,near North ex mall railway batala road
country:        IN
phone:          +91 03322277132
e-mail:         abhijitm@alliancekolkata.com
nic-hdl:        AM1297-AP
mnt-by:         MAINT-IN-FURTAIN
last-modified:  2016-05-19T05:12:52Z
source:         APNIC

% Information related to '45.250.245.0/24AS23860'

route:          45.250.245.0/24
descr:          Route for 45.250.245.0/24
origin:         AS23860
country:        IN
mnt-lower:      MAINT-IN-ABSPL
mnt-routes:     MAINT-IN-ABSPL
mnt-by:         MAINT-IN-ABSPL
notify:         support@alliancebroadband.co.in
last-modified:  2020-08-04T05:34:16Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-AU3)

Search for
IP address lookups			Miscellaneous queries
-l	1st level less specific		-i	Inverse attributes	None admin-c admin-c,tech-c,zone-c author cross-mnt cross-nfy local-as mbrs-by-ref member-of mnt-by mnt-lower mnt-nfy mnt-routes notify nserver origin person referral-by rev-srv sub-dom tech-c upd-to zone-c
-L	All less specific		-T	Object types	All as-block as-set aut-num domain filter-set inet-rtr inet6num inetnum irt key-cert mntner peering-set person role route route-set rtr-set
-m	1st level more specific
-M	All more specific		Query hints Include "AS" in front of an AS number. Example: AS4808 Include "-t" (template only) or "-v" (template and description) in front of an object name to view the template Example: -t inetnum
-x	Exact match only
-d	Associated reverse domain