% 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 'AS19399 - AS19399'

as-block:       AS19399 - AS19399
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 'AS19399'

% Abuse contact for 'AS19399' is 'abuse@regionstockholm.se'

aut-num:        AS19399
as-name:        SLLNET
org:            ORG-SLL21-RIPE
sponsoring-org: ORG-RESI1-RIPE
import:         from AS8473 accept ANY
import:         from AS714 accept AS-APPLE
import:         from AS2119 accept AS-TELENOR
import:         from AS2603 accept AS-NORDUNET
import:         from AS2906 accept AS-NFLX
import:         from AS16509 accept AS-AMAZON
import:         from AS15169 accept AS-GOOGLE
import:         from AS32934 accept AS-FACEBOOK
import:         from AS29518 accept AS-BREDBAND2
import:         from AS39651 accept AS-COMHEM
import:         from AS9201 accept AS-SWAF
import:         from AS8075 accept AS-MICROSOFT
import:         from AS8674 accept AS-NETNOD-ANYCAST
import:         from AS35706 accept AS-NAO
import:         from AS61955 accept AS-COLOCATIONIX
import:         from AS57208 accept AS-TELECOMPUTING
import:         from AS12552 accept AS-IPO
import:         from AS394354 accept AS-394354
import:         from AS50572 accept AS-NORDLO
import:         from AS6939 accept AS-HURRICANE
export:         to AS8473 announce AS-SLL
export:         to AS714 announce AS-SLL
export:         to AS2119 announce AS-SLL
export:         to AS2603 announce AS-SLL
export:         to AS2906 announce AS-SLL
export:         to AS16509 announce AS-SLL
export:         to AS15169 announce AS-SLL
export:         to AS32934 announce AS-SLL
export:         to AS29518 announce AS-SLL
export:         to AS39651 announce AS-SLL
export:         to AS9201 announce AS-SLL
export:         to AS8075 announce AS-SLL
export:         to AS8674 announce AS-SLL
export:         to AS35706 announce AS-SLL
export:         to AS61955 announce AS-SLL
export:         to AS57208 announce AS-SLL
export:         to AS12552 announce AS-SLL
export:         to AS394354 announce AS-SLL
export:         to AS50572 announce AS-SLL
export:         to AS6939 announce AS-SLL
remarks:        ---------------------------------------------------------
remarks:        This AS is present at the following IX's
remarks:        * Netnod Stockholm, Sweden
remarks:        ---------------------------------------------------------
remarks:        For questions or peering requests peering@regionstockholm.se
remarks:        ---------------------------------------------------------
remarks:        For operational issues, please contact.
remarks:        peering@regionstockholm.se
remarks:        ---------------------------------------------------------
remarks:        Abuse issues only to abuse@regionstockholm.se.
remarks:        ---------------------------------------------------------
admin-c:        SLL10-RIPE
tech-c:         SLL10-RIPE
status:         LEGACY
mnt-by:         RIPE-NCC-LEGACY-MNT
mnt-by:         RESILANS-MNT
created:        2002-08-21T16:28:45Z
last-modified:  2022-09-19T10:04:52Z
source:         RIPE # Filtered

organisation:   ORG-SLL21-RIPE
org-name:       Region Stockholm
country:        SE
org-type:       OTHER
address:        Region Stockholm
address:        Lindhagensgatan 98
address:        SE-112 18 Stockholm
address:        Sweden
admin-c:        SLL10-RIPE
tech-c:         SLL10-RIPE
abuse-c:        SLL10-RIPE
mnt-by:         RESILANS-MNT
mnt-ref:        RESILANS-MNT
created:        2013-02-27T09:47:49Z
last-modified:  2023-04-20T08:05:02Z
source:         RIPE # Filtered

role:           Region Stockholm
address:        Lindhagensgatan 98
address:        SE-112 18 Stockholm
address:        Sweden
phone:          +46 812310000
abuse-mailbox:  abuse@regionstockholm.se
admin-c:        ME5878-RIPE
tech-c:         JE3286-RIPE
tech-c:         ME5878-RIPE
nic-hdl:        SLL10-RIPE
mnt-by:         RESILANS-MNT
created:        2011-03-31T14:47:26Z
last-modified:  2023-04-20T07:54:58Z
source:         RIPE # Filtered

% 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