% 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 '83.166.188.0 - 83.166.188.255'

% Abuse contact for '83.166.188.0 - 83.166.188.255' is 'abuse@node4.co.uk'

inetnum:        83.166.188.0 - 83.166.188.255
netname:        N4-UK-AGGREGATE
descr:          N4 DSL Customers DHCP
country:        GB
admin-c:        AG3192-RIPE
tech-c:         NFNR-RIPE
status:         ASSIGNED PA
mnt-by:         N4-NOC
created:        2005-06-21T11:19:36Z
last-modified:  2023-07-27T09:46:25Z
source:         RIPE # Filtered

role:           Node4 Network Role
address:        Node4 Ltd
address:        Millennium Way
address:        Pride Park
address:        Derby
address:        DE24 8HZ
remarks:        *******************************************************
remarks:        * Node4 has an open peering policy and are        *
remarks:        * located at LINX and Xchange Point   *
remarks:        * t: +44 845 123 2222          *
remarks:        * f: +44 845 123 2221          *
remarks:        * w: http://www.node4.co.uk         *
remarks:        * e: peering at node4.co.uk         *
remarks:        *******************************************************
phone:          +44 845 123 2222
fax-no:         +44 845 123 2221
remarks:        trouble:      Send ABUSE REPORTS to abuse at node4.co.uk
admin-c:        AG3192-RIPE
tech-c:         AG3192-RIPE
nic-hdl:        NFNR-RIPE
mnt-by:         N4-NOC
created:        2004-05-31T17:30:48Z
last-modified:  2011-01-18T13:13:56Z
source:         RIPE # Filtered
abuse-mailbox:  abuse@node4.co.uk

person:         Andrew Gilbert
address:        Node4 Ltd
address:        Millennium Way
address:        Pride Park
address:        Derby
address:        DE24 8HZ
phone:          +44 845 123 2222
nic-hdl:        AG3192-RIPE
mnt-by:         N4-NOC
created:        2004-04-27T13:06:39Z
last-modified:  2011-01-18T13:12:44Z
source:         RIPE # Filtered

% Information related to '83.166.188.0/22AS31727'

route:          83.166.188.0/22
descr:          Node4 DSL Network
origin:         AS31727
mnt-by:         N4-NOC
created:        2006-12-29T08:06:36Z
last-modified:  2006-12-29T08:06:36Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.113.2 (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