% 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 'MAINT-ID-SURABAYA'

mntner:         MAINT-ID-SURABAYA
upd-to:         dinkominfo.ti@surabaya.go.id
auth:           # Filtered
descr:          Pemerintah Kota Surabaya
descr:          Goverment
descr:          Jl. Jimerto 25 - 27
descr:          Surabaya, 60272
descr:          Jawa Timur
admin-c:        DKDI9-AP
tech-c:         DKDI9-AP
country:        ID
mnt-nfy:        bidangti@surabaya.go.id
referral-by:    APNIC-HM
mnt-by:         MAINT-ID-SURABAYA
remarks:        Send Spam & Abuse Reports to: hostmaster@surabaya.go.id
last-modified:  2020-06-18T04:15:45Z
source:         APNIC

person:         Dinas Komunikasi dan Informatika Pemerintah Kota Surabaya
address:        Gedung Pemerintah Kota Surabaya
address:        Jl. Jimerto No. 25-27 Lt. V
address:        Surabaya 60272
country:        ID
phone:          +62-31-5312144
e-mail:         dinkominfo.ti@surabaya.go.id
e-mail:         bidangti@surabaya.go.id
nic-hdl:        DKDI9-AP
mnt-by:         MNT-APJII-ID
fax-no:         +62-31-5450154
last-modified:  2020-06-17T03:37:35Z
source:         APNIC

% Information related to 'MAINT-ID-SURABAYA'

mntner:         MAINT-ID-SURABAYA
upd-to:         dinkominfo.ti@surabaya.go.id
descr:          Pemerintah Kota Surabaya
descr:          Goverment
descr:          Jl. Jimerto 25 - 27
descr:          Surabaya, 60272
descr:          Jawa Timur
auth:           # Filtered
admin-c:        IA89-AP
tech-c:         IA89-AP
country:        ID
mnt-nfy:        dinkominfo.ti@surabaya.go.id
referral-by:    MNT-APJII-ID
mnt-by:         MAINT-ID-SURABAYA
remarks:        Send Spam & Abuse Reports to: hostmaster@surabaya.go.id
last-modified:  2021-04-29T02:28:44Z
source:         IDNIC

person:         Irvan Dani Ananda
nic-hdl:        IA89-AP
e-mail:         irvan_da@surabaya.go.id
address:        Pemerintah Kota Surabaya
address:        Jl. Jimerto no 25-27
address:        Surabaya 60272
phone:          +62-31-5312144
fax-no:         +62-31-5450154
country:        ID
mnt-by:         MAINT-ID-SURABAYA
last-modified:  2009-02-12T08:30:42Z
source:         IDNIC

% This query was served by the APNIC Whois Service version 1.88.25 (WHOIS-AU2)

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