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

% [whois.apnic.net]
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% Information related to '164.100.0.0 - 164.100.255.255'

% Abuse contact for '164.100.0.0 - 164.100.255.255' is 'abuse@nic.in'

inetnum:        164.100.0.0 - 164.100.255.255
netname:        NICNET
descr:          NICNET, INDIA
descr:          NATIONAL INFORMATICS CENTRE
country:        IN
org:            ORG-NIC2-AP
admin-c:        DC2904-AP
tech-c:         DC2904-AP
tech-c:         NNA23-AP
abuse-c:        AN884-AP
status:         ALLOCATED PORTABLE
mnt-by:         APNIC-HM
mnt-lower:      MAINT-IN-NIC
mnt-routes:     MAINT-IN-NIC
mnt-irt:        IRT-NATIONALINFO-IN
last-modified:  2024-11-22T06:17:12Z
source:         APNIC

irt:            IRT-NATIONALINFO-IN
address:        NIC, A-BLOCK CGO Complex
address:        New Delhi - 110003
address:        INDIA
e-mail:         abuse@nic.in
abuse-mailbox:  abuse@nic.in
admin-c:        NNA23-AP
tech-c:         GK397-AP
auth:           # Filtered
remarks:        abuse@nic.in was validated on 2025-09-17
mnt-by:         MAINT-IN-NIC
last-modified:  2025-11-18T00:26:43Z
source:         APNIC

organisation:   ORG-NIC2-AP
org-name:       National Informatics Centre
org-type:       LIR
country:        IN
address:        Devasish Chanda
address:        National Informatics Centre
address:        A-Block, CGO Complex, Lodhi Road
address:        LODHI ROAD
phone:          +91 11 24305594
fax-no:         +91-11-24366681
e-mail:         deva@nic.in
mnt-ref:        APNIC-HM
mnt-by:         APNIC-HM
last-modified:  2025-05-08T12:59:36Z
source:         APNIC

role:           ABUSE NATIONALINFOIN
country:        ZZ
address:        NIC, A-BLOCK CGO Complex
address:        New Delhi - 110003
address:        INDIA
phone:          +000000000
e-mail:         abuse@nic.in
admin-c:        NNA23-AP
tech-c:         GK397-AP
nic-hdl:        AN884-AP
remarks:        Generated from irt object IRT-NATIONALINFO-IN
remarks:        abuse@nic.in was validated on 2025-09-17
abuse-mailbox:  abuse@nic.in
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-17T11:23:57Z
source:         APNIC

role:           NIC - Network Administrator
address:        National Informatics Centre
address:        A - Block, CGO Complex
address:        Lodhi Road
address:        New Delhi - 110003
country:        IN
phone:          +91 - 1800 111 555
e-mail:         support@nic.in
admin-c:        DC2904-AP
tech-c:         GK397-AP
nic-hdl:        NNA23-AP
remarks:        NIC Role Object
abuse-mailbox:  abuse@nic.in
mnt-by:         MAINT-IN-NIC
last-modified:  2025-08-20T06:41:20Z
source:         APNIC

person:         Devashish Chanda
address:
country:        IN
phone:          +91 11 24305594
e-mail:         deva@gov.in
nic-hdl:        DC2904-AP
mnt-by:         MAINT-IN-NIC
last-modified:  2024-11-22T06:05:05Z
source:         APNIC

% Information related to '164.100.177.0/24AS4758'

route:          164.100.177.0/24
origin:         AS4758
descr:          National Informatics Centre
                A4B4 Bay, 3rd Floor
                NATIONAL INFORMATICS CENTRE
                A-BLOCK, CGO COMPLEX
                LODHI ROAD
mnt-by:         MAINT-IN-NIC
last-modified:  2020-10-01T09:04:56Z
source:         APNIC

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