% 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 '213.18.248.0 - 213.18.255.255'

% No abuse contact registered for 213.18.248.0 - 213.18.255.255

inetnum:        213.18.248.0 - 213.18.255.255
netname:        RMPLC
descr:          Research Machines plc
country:        GB
admin-c:        RMS4-RIPE
tech-c:         RMS4-RIPE
status:         ASSIGNED PA
mnt-by:         RIPE-NCC-HM-MNT
mnt-lower:      RMIFL-MNT
mnt-routes:     RMIFL-MNT
created:        2002-06-13T08:04:41Z
last-modified:  2002-06-13T08:04:41Z
source:         RIPE

role:           Research Machines Staff
address:        RM Education Ltd
address:        142B Park Drive
address:        Milton Park
address:        Abingdon
address:        Oxfordshire
address:        OX14 4SE
address:        United Kingdom
phone:          +44 1235 826000
fax-no:         +44 1235 826999
remarks:        trouble: IMPORTANT NOTICE
remarks:        trouble: If you wish to report abuse originating from within the
remarks:        trouble: from within the Internet for Learning network please
remarks:        trouble: mailto:abuse@ifl.net
admin-c:        AD12732-RIPE
tech-c:         SR753
tech-c:         AD12732-RIPE
nic-hdl:        RMS4-RIPE
mnt-by:         RMIFL-MNT
created:        2001-11-27T13:22:14Z
last-modified:  2023-04-05T07:51:46Z
source:         RIPE # Filtered
abuse-mailbox:  abuse@ifl.net

% Information related to '213.18.192.0/18AS19905'

route:          213.18.192.0/18
descr:          RM Education
origin:         AS19905
created:        2024-02-27T14:57:19Z
last-modified:  2024-02-27T14:57:19Z
source:         RIPE
mnt-by:         AS5503-MNT

% Information related to '213.18.192.0/18AS5503'

route:          213.18.192.0/18
descr:          RM Education
descr:          Internet for Learning
origin:         AS5503
mnt-by:         AS5503-MNT
created:        2019-10-07T12:13:24Z
last-modified:  2019-10-07T12:15:12Z
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