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

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% The objects are in RPSL format.
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% Note: this output has been filtered.
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% Information related to '86.188.143.192 - 86.188.143.207'

% Abuse contact for '86.188.143.192 - 86.188.143.207' is 'abuse@bt.com'

inetnum:        86.188.143.192 - 86.188.143.207
netname:        BTNET-CUSTOMER
descr:          FTIP007365829 IP MASTER
country:        GB
admin-c:        BY73-RIPE
tech-c:         BY73-RIPE
status:         ASSIGNED PA
mnt-by:         BTNET-MNT
mnt-lower:      BTNET-MNT
mnt-routes:     BTNET-MNT
remarks:        Please send abuse notification to btnet.abuse@bt.com
remarks:        Please send delisting issues to btnetdns@bt.net
remarks:        This range is statically assigned
created:        2023-02-03T14:19:58Z
last-modified:  2023-02-03T14:19:58Z
source:         RIPE

person:         IP MASTER TEAM
address:        pp HWG298
address:        Virtual Postbox (HOM-NX)
address:        PO Box 400
address:        London
address:        N18 1XU
address:        UK
phone:          +448000850223
nic-hdl:        BY73-RIPE
mnt-by:         BTNET-MNT
remarks:        Please send abuse notification to btnet.abuse@bt.com
created:        2009-11-09T08:39:01Z
last-modified:  2023-03-07T12:38:29Z
source:         RIPE

% Information related to '86.128.0.0/10AS2856'

route:          86.128.0.0/10
descr:          BT Public Internet Service
origin:         AS2856
mnt-by:         BTNET-INFRA-MNT
member-of:      AS2856:RS-UKPL
created:        2005-02-12T08:46:12Z
last-modified:  2018-11-29T09:40:39Z
source:         RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.117 (SHETLAND)