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

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://apps.db.ripe.net/docs/HTML-Terms-And-Conditions

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '81.163.0.0 - 81.163.7.255'

% Abuse contact for '81.163.0.0 - 81.163.7.255' is 'abuse@skydsl.ir'

inetnum:        81.163.0.0 - 81.163.7.255
netname:        IR-RasanaPishtaz
country:        IR
org:            ORG-RPIS1-RIPE
geoloc:         35.9579353 50.6819961
admin-c:        ENZ70-RIPE
admin-c:        EM12153-RIPE
tech-c:         ENZ70-RIPE
tech-c:         EM12153-RIPE
status:         ASSIGNED PI
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNT-MIHAN
mnt-by:         MNT-HAMED
mnt-routes:     MNT-MIHAN
mnt-routes:     MNT-HAMED
mnt-routes:     Rasanapishtaz
mnt-domains:    MNT-MIHAN
mnt-domains:    MNT-HAMED
mnt-domains:    Rasanapishtaz
mnt-lower:      Rasanapishtaz
mnt-by:         Rasanapishtaz
created:        2011-08-23T07:48:01Z
last-modified:  2019-12-16T20:14:55Z
source:         RIPE # Filtered
sponsoring-org: ORG-MCSC2-RIPE

organisation:   ORG-RPIS1-RIPE
org-name:       Rasana Pishtaz Iranian Service Cooperative Co.
country:        IR
org-type:       Other
address:        Floor 3,Haj Madani Building, Imam Blvd., Hashtgerd-IRAN
phone:          +98-262-4233031
abuse-c:        AR28499-RIPE
mnt-ref:        MNT-MIHAN
mnt-by:         MNT-HAMED
mnt-by:         MNT-MIHAN
created:        2011-08-11T13:20:39Z
last-modified:  2022-12-01T16:45:40Z
source:         RIPE # Filtered

person:         Ebrahim Mamani
address:        Unit5, No2, Emam Khomeini AVE, Hashtgerd City, Tehraan Provice, Iran
phone:          +989195999975
nic-hdl:        EM12153-RIPE
mnt-by:         RPI-Mamani
mnt-by:         Rasanapishtaz
created:        2018-01-18T06:12:13Z
last-modified:  2018-01-26T21:25:42Z
source:         RIPE # Filtered
fax-no:         +98 26 44233031 - 8

person:         Ebrahim Nokhbeh Zaeim
address:        Floor 3,Haj Madani Building, Imam Blvd., Hashtgerd-IRAN
phone:          +98-262-4233031
nic-hdl:        ENZ70-RIPE
mnt-by:         Rasanapishtaz
created:        2018-02-17T12:47:34Z
last-modified:  2018-10-09T16:15:36Z
source:         RIPE

% Information related to '81.163.5.0/24AS58303'

route:          81.163.5.0/24
descr:          Rasana Pishtaz Iranian Service Cooperative Co.
origin:         AS58303
mnt-by:         MNT-MIHAN
mnt-by:         MNT-RPI
mnt-by:         Rasanapishtaz
created:        2014-04-07T05:24:01Z
last-modified:  2021-10-03T00:24:11Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.112 (DEXTER)

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