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

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% The objects are in RPSL format.
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% Information related to '2001:16a4::/32'

% Abuse contact for '2001:16a4::/32' is 'registry@stc.com.sa'

inet6num:       2001:16a4::/32
netname:        STC_Mobile
country:        SA
admin-c:        STCR1-RIPE
tech-c:         STCR2-RIPE
status:         ASSIGNED
mnt-by:         SAUDINET-STC
created:        2019-06-11T08:03:48Z
last-modified:  2019-06-11T08:03:48Z
source:         RIPE

role:           Saudi Telecom Co. Registry Admin-C contact
address:        STC complex, murslat, Riyadh
address:        P.O.Box: 295997
address:        Riyadh 11351
address:        Saudi Arabia
phone:          +966-11-4525020
fax-no:         +966114433639
abuse-mailbox:  registry@stc.com.sa
admin-c:        AR5383-RIPE
tech-c:         AR5383-RIPE
remarks:        For any Abuse or Spamming please send your requests directly to registry@stc.com.sa
mnt-by:         SAUDINET-STC
nic-hdl:        STCR1-RIPE
created:        2003-12-29T20:33:34Z
last-modified:  2015-11-04T06:35:37Z
source:         RIPE # Filtered

role:           Saudi Telecom Co. Registry Tech-C contact
address:        Murslat Campus, Riyadh
address:        P.O.Box: 295997
address:        Riyadh 11351
address:        Saudi Arabia
phone:          +966114525020
fax-no:         +966114433639
abuse-mailbox:  registry@stc.com.sa
admin-c:        STCR1-RIPE
tech-c:         STCR1-RIPE
remarks:        For any Abuse or Spamming please send your requests directly to registry@stc.com.sa
mnt-by:         SAUDINET-STC
nic-hdl:        STCR2-RIPE
created:        2003-12-29T20:56:08Z
last-modified:  2015-11-04T06:37:15Z
source:         RIPE # Filtered

% Information related to '2001:16a4:5::/48AS39891'

route6:         2001:16a4:5::/48
origin:         AS39891
mnt-by:         SAUDINET-STC
created:        2023-01-10T06:35:14Z
last-modified:  2023-01-10T06:35:14Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.114 (DEXTER)

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