% 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 'AS15965 - AS16057'

as-block:       AS15965 - AS16057
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2018-11-22T15:27:26Z
last-modified:  2018-11-22T15:27:26Z
source:         RIPE

% Information related to 'AS15991'

% Abuse contact for 'AS15991' is 'abuse@skatteverket.se'

aut-num:        AS15991
as-name:        Swedish_Tax_Agency
org:            ORG-STA47-RIPE
descr:          IT-department Korta gatan 10 SE-17194 Solna Sweden
import:         from AS3301 action pref=100; accept ANY
import:         from AS3292 action pref=100; accept ANY
export:         to AS3301 announce AS15991
export:         to AS3292 announce AS15991
default:        to AS3301 action pref=100; networks ANY
admin-c:        RP15441-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
tech-c:         RP15441-RIPE
mnt-by:         TAX-MNT
created:        1970-01-01T00:00:00Z
last-modified:  2022-04-28T11:12:42Z
source:         RIPE

organisation:   ORG-STA47-RIPE
org-name:       Swedish Tax Agency
country:        SE
org-type:       LIR
address:        Sturegatan 4
address:        172 31
address:        Sundbyberg
address:        SWEDEN
phone:          +4677156 75 67
fax-no:         +46105748550
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        TAX-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         TAX-MNT
admin-c:        RP15441-RIPE
abuse-c:        AC23770-RIPE
created:        2011-04-11T11:28:32Z
last-modified:  2022-04-26T12:10:34Z
source:         RIPE # Filtered

person:         Reine Persson
address:        Sturegatan 4, 172 31 Sundbyberg, Sweden
phone:          +46 708189832
nic-hdl:        RP15441-RIPE
mnt-by:         SKV-137-60
mnt-by:         TAX-MNT
mnt-by:         SKV-137-61
created:        2019-05-23T13:30:33Z
last-modified:  2022-04-25T07:27:32Z
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