% 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 '85.31.136.0 - 85.31.139.255'

% Abuse contact for '85.31.136.0 - 85.31.139.255' is 'ripe@c2kni.org.uk'

inetnum:        85.31.136.0 - 85.31.139.255
netname:        NETC2K
mnt-routes:     MNT-HPC2K
mnt-lower:      MNT-HPC2K
org:            ORG-CA744-RIPE
descr:          C2k Ext Gen Services
country:        GB
admin-c:        AM8141-RIPE
tech-c:         AM8141-RIPE
status:         ASSIGNED PA
mnt-by:         MNT-HPC2K
created:        2005-07-11T16:32:48Z
last-modified:  2005-07-11T16:32:48Z
source:         RIPE

organisation:   ORG-CA744-RIPE
org-name:       C2k
country:        GB
org-type:       LIR
address:        LANYON PLACE  9
address:        BT1 3FJ
address:        BELFAST
address:        IRELAND
phone:          +44 28 90279009
fax-no:         +44 28 90279017
abuse-c:        AR17542-RIPE
admin-c:        JM2721-RIPE
admin-c:        AM8141-RIPE
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        EIRCOM-NOC-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         EIRCOM-NOC-MNT
created:        2005-07-05T05:11:08Z
last-modified:  2023-02-17T14:36:42Z
source:         RIPE # Filtered

person:         Angus McBride
address:        4th Floor
address:        9, Lanyon Place
address:        Belfast
address:        N.Ireland
address:        UK
address:        BT1 3FJ
phone:          +44 28902687811
nic-hdl:        AM8141-RIPE
created:        2005-07-11T13:42:52Z
last-modified:  2020-06-03T11:00:17Z
source:         RIPE
mnt-by:         MNT-HPC2K

% Information related to '85.31.136.0/21AS35299'

route:          85.31.136.0/21
descr:          C2k NI
origin:         AS35299
mnt-by:         MNT-HPC2K
created:        2005-07-20T15:19:28Z
last-modified:  2005-07-20T15:19:28Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.111 (SHETLAND)

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