% 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 '210.212.239.176 - 210.212.239.191'

% Abuse contact for '210.212.239.176 - 210.212.239.191' is 'abuse1@bsnl.co.in'

inetnum:        210.212.239.176 - 210.212.239.191
netname:        IISTNET
descr:          Registrar,IIST,Trivandrum
descr:          Indian Institute of Space Science and Technology
descr:          ATF Campus,Veli
descr:          Trivandrum 695022
admin-c:        RKG8-AP
tech-c:         SG594-AP
country:        IN
admin-c:        NIT5-AP
admin-c:        NC83-AP
tech-c:         CDN1-AP
mnt-by:         MAINT-IN-DOT
status:         ASSIGNED NON-PORTABLE
last-modified:  2009-03-31T11:20:10Z
source:         APNIC

role:           CGM Data Networks
address:        CTS Compound
address:        Netaji Nagar
address:        New Delhi- 110 023
country:        IN
phone:          +91-11-24106782
phone:          +91-11-24102119
fax-no:         +91-11-26116783
fax-no:         +91-11-26887888
e-mail:         dnwplg@bsnl.co.in
e-mail:         hostmaster@bsnl.co.in
admin-c:        CGMD1-AP
tech-c:         DT197-AP
tech-c:         BH155-AP
nic-hdl:        CDN1-AP
mnt-by:         MAINT-IN-DOT
last-modified:  2021-12-08T11:06:57Z
source:         APNIC

role:           NS Cell
address:        Internet Cell
address:        Bharat Sanchar Nigam Limited
address:        8th Floor,148-B Statesman House
address:        Barakhamba Road, New Delhi - 110 001
country:        IN
phone:          +91-11-23734057
phone:          +91-11-23710183
fax-no:         +91-11-23734052
e-mail:         hostmaster@bsnl.co.in
e-mail:         abuse1@bsnl.co.in
admin-c:        CGMD1-AP
tech-c:         DT197-AP
nic-hdl:        NC83-AP
mnt-by:         MAINT-IN-DOT
last-modified:  2022-03-16T10:12:22Z
source:         APNIC

person:         Node Incharge TRIVANDRUM
nic-hdl:        NIT5-AP
address:        NIB TRIVANDRUM
address:        DE NIB, Tele Exchange, Kaithamukku , Trivandrum ,6
phone:          +91-0471-576666
fax-no:         +91-0471-576576
country:        IN
e-mail:         nib_trivandrum@sancharnet.in
mnt-by:         MAINT-IN-PER-DOT
last-modified:  2008-09-04T07:33:21Z
source:         APNIC

person:         Raju K George
nic-hdl:        RKG8-AP
address:        Indian Institute of Space Science and Technology
address:        ATF Campus,Veli
address:        Trivandrum 695022
phone:          +91-471-2563463
fax-no:         +91-471-2564806
country:        IN
e-mail:         rkg.iist@gmail.com
mnt-by:         MAINT-IN-PER-DOT
last-modified:  2009-03-31T11:01:00Z
source:         APNIC

person:         Suja G
nic-hdl:        SG594-AP
address:        Indian Institute of Space Science and Technology
address:        ATF Campus,Veli
address:        Trivandrum 695022
phone:          +91-471-2564825
fax-no:         +91-471-2564806
country:        IN
e-mail:         suja_shiju@yahoo.com
mnt-by:         MAINT-IN-PER-DOT
last-modified:  2009-03-31T11:01:01Z
source:         APNIC

% Information related to '210.212.239.0/24AS9829'

route:          210.212.239.0/24
origin:         AS9829
descr:          Bharat Sanchar Nigam Ltd
                Bharat Sanchar Nigam Limited
                Bharat Sanchar Bhawan, Harish Chandra Mathur Lane, Janpath, New Delhi   110 001
                India
mnt-by:         MAINT-IN-DOT
last-modified:  2026-02-24T12:17:59Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-AU4)