% 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://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to '188.29.0.0 - 188.29.255.255'

% Abuse contact for '188.29.0.0 - 188.29.255.255' is 'abuse@three.co.uk'

inetnum:        188.29.0.0 - 188.29.255.255
netname:        H3GUK
descr:          Mobile Broadband Service
country:        GB
admin-c:        HURA1-RIPE
tech-c:         HURA1-RIPE
status:         ASSIGNED PA
mnt-by:         H3GUK-MNT
created:        2011-01-26T15:47:31Z
last-modified:  2020-08-20T06:53:25Z
source:         RIPE

role:           H3G UK RIPE Admin
address:        Hutchison 3G UK Ltd
address:        450 Longwater Avenue
address:        Green Park
address:        Reading
address:        RG2 6GF
address:        United Kingdom
mnt-by:         H3GUK-MNT
admin-c:        SW6044-RIPE
admin-c:        JC12241-RIPE
tech-c:         SW6044-RIPE
tech-c:         JC12241-RIPE
abuse-mailbox:  abuse@three.co.uk
nic-hdl:        HURa1-RIPE
created:        2008-06-17T14:18:15Z
last-modified:  2024-07-24T07:56:52Z
source:         RIPE # Filtered

% Information related to '188.28.0.0/15AS206067'

route:          188.28.0.0/15
origin:         AS206067
descr:          Mobile Broadband Service
mnt-by:         H3GUK-MNT
created:        2020-08-20T06:28:38Z
last-modified:  2023-09-10T19:56:20Z
source:         RIPE

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