% 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 '45.121.0.0 - 45.121.3.255'

% Abuse contact for '45.121.0.0 - 45.121.3.255' is 'abuse@railtelindia.com'

inetnum:        45.121.0.0 - 45.121.3.255
netname:        RAILTEL-IN
descr:          RailTel Corporation is an Internet Service Provider.
country:        IN
admin-c:        NA1011-AP
tech-c:         NA1011-AP
abuse-c:        NA1011-AP
status:         ALLOCATED PORTABLE
mnt-by:         MAINT-IN-IRINN
mnt-lower:      MAINT-IN-RAILTEL
mnt-lower:      MAINT-IN-IRINN
mnt-routes:     MAINT-IN-RAILTEL
mnt-routes:     MAINT-IN-IRINN
mnt-irt:        IRT-RAILTEL-IN
last-modified:  2025-08-11T22:47:34Z
source:         APNIC

irt:            IRT-RAILTEL-IN
address:        Plot No, 143
address:        Sector 44 ,Gurugram
address:        Haryana ,122003
e-mail:         abuse@railtelindia.com
abuse-mailbox:  abuse@railtelindia.com
admin-c:        NA1011-AP
tech-c:         NA1011-AP
auth:           # Filtered
mnt-by:         MAINT-IN-RAILTEL
mnt-by:         MAINT-IN-IRINN
last-modified:  2025-11-18T00:26:21Z
source:         APNIC

person:         Network Administrator
address:        Plate-A, 6th Floor, Office Block Tower-2,
address:        East Kidwai Nagar, New Delhi-110023
country:        IN
phone:          +91 11 22900600
e-mail:         ipadmin@railtel.in
nic-hdl:        NA1011-AP
mnt-by:         MAINT-IN-RAILTEL
mnt-by:         MAINT-IN-IRINN
fax-no:         +91 11 22900699
last-modified:  2025-09-27T09:36:11Z
source:         APNIC

% Information related to '45.121.2.0/24AS24186'

route:          45.121.2.0/24
descr:          Railtel
origin:         AS24186
mnt-by:         MAINT-IN-RAILTEL
mnt-by:         MAINT-IN-IRINN
mnt-routes:     MAINT-IN-IRINN
last-modified:  2025-12-14T22:17:54Z
source:         APNIC

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