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

% [whois.apnic.net]
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% Information related to '203.196.128.0 - 203.196.143.255'

% Abuse contact for '203.196.128.0 - 203.196.143.255' is 'karamjeet.singh@tatatel.co.in'

inetnum:        203.196.128.0 - 203.196.143.255
netname:        TCISL-IN
descr:          TATA Communications Internet Services Ltd
descr:          Scope Minar
descr:          Core 1, 2nd Floor
descr:          Laxmi Nagar
descr:          New Delhi - 110 092
country:        IN
org:            ORG-TCIS1-AP
admin-c:        KS1346-AP
tech-c:         KS1346-AP
abuse-c:        AT1380-AP
status:         ALLOCATED PORTABLE
mnt-by:         APNIC-HM
mnt-lower:      MAINT-IN-DIL
mnt-routes:     MAINT-IN-DIL
mnt-irt:        IRT-TCISL-IN
last-modified:  2024-11-28T04:11:18Z
source:         APNIC

irt:            IRT-TCISL-IN
address:        Scope Minar, Core 1
address:        2nd Floor, Laxmi Nagar
address:        New Delhi - 110092
e-mail:         karamjeet.singh@tatatel.co.in
abuse-mailbox:  karamjeet.singh@tatatel.co.in
admin-c:        KS1346-AP
tech-c:         KS1346-AP
auth:           # Filtered
remarks:        karamjeet.singh@tatatel.co.in is invalid
mnt-by:         MAINT-IN-DIL
last-modified:  2024-12-12T16:50:30Z
source:         APNIC

organisation:   ORG-TCIS1-AP
org-name:       TATA Communications Internet Services Ltd
org-type:       LIR
country:        IN
address:        Tata Communications Ltd
address:        GCSC, Alandi Road
address:        Dighi
phone:          +91-9805084887
fax-no:         +91-20-66143278
e-mail:         karamjeet.singh@tatatel.co.in
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2025-01-02T12:58:45Z
source:         APNIC

role:           ABUSE TCISLIN
country:        ZZ
address:        Scope Minar, Core 1
address:        2nd Floor, Laxmi Nagar
address:        New Delhi - 110092
phone:          +000000000
e-mail:         karamjeet.singh@tatatel.co.in
admin-c:        KS1346-AP
tech-c:         KS1346-AP
nic-hdl:        AT1380-AP
remarks:        Generated from irt object IRT-TCISL-IN
remarks:        karamjeet.singh@tatatel.co.in is invalid
abuse-mailbox:  karamjeet.singh@tatatel.co.in
mnt-by:         APNIC-ABUSE
last-modified:  2024-12-12T16:50:40Z
source:         APNIC

person:         Karamjeet Singh
address:        Scope Minar
country:        IN
phone:          +91-11-224-48000
e-mail:         karamjeet.singh@tatatel.co.in
nic-hdl:        KS1346-AP
mnt-by:         MAINT-IN-DIL
last-modified:  2024-11-27T16:51:23Z
source:         APNIC

% Information related to '203.196.128.0/21AS17820'

route:          203.196.128.0/21
descr:          VISL-203.196.128.0/21 route object
origin:         AS17820
country:        IN
mnt-by:         MAINT-IN-DIL
last-modified:  2008-09-04T07:54:45Z
source:         APNIC

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